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2019-11-17crypto: lib - tidy up lib/crypto Kconfig and MakefileArd Biesheuvel2-8/+23
In preparation of introducing a set of crypto library interfaces, tidy up the Makefile and split off the Kconfig symbols into a separate file. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-11-15lib/xz: fix XZ_DYNALLOC to avoid useless memory reallocationsLasse Collin1-0/+1
s->dict.allocated was initialized to 0 but never set after a successful allocation, thus the code always thought that the dictionary buffer has to be reallocated. Link: http://lkml.kernel.org/r/20191104185107.3b6330df@tukaani.org Signed-off-by: Lasse Collin <lasse.collin@tukaani.org> Reported-by: Yu Sun <yusun2@cisco.com> Acked-by: Daniel Walker <danielwa@cisco.com> Cc: "Yixia Si (yisi)" <yisi@cisco.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-11-15pipe: Allow pipes to have kernel-reserved slotsDavid Howells1-2/+2
Split pipe->ring_size into two numbers: (1) pipe->ring_size - indicates the hard size of the pipe ring. (2) pipe->max_usage - indicates the maximum number of pipe ring slots that userspace orchestrated events can fill. This allows for a pipe that is both writable by the general kernel notification facility and by userspace, allowing plenty of ring space for notifications to be added whilst preventing userspace from being able to pin too much unswappable kernel space. Signed-off-by: David Howells <dhowells@redhat.com>
2019-11-15y2038: vdso: change time_t to __kernel_old_time_tArnd Bergmann1-2/+2
Only x86 uses the 'time' syscall in vdso, so change that to __kernel_old_time_t as a preparation for removing 'time_t' and '__kernel_time_t' later. Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-14seq_buf: Add printing formatted hex dumpsPiotr Maziarz1-0/+62
Provided function is an analogue of print_hex_dump(). Implementing this function in seq_buf allows using for multiple purposes (e.g. for tracing) and therefore prevents from code duplication in every layer that uses seq_buf. print_hex_dump() is an essential part of logging data to dmesg. Adding similar capability for other purposes is beneficial to all users. Example usage: seq_buf_hex_dump(seq, "", DUMP_PREFIX_OFFSET, 16, 4, buf, ARRAY_SIZE(buf), true); Example output: 00000000: 00000000 ffffff10 ffffff32 ffff3210 ........2....2.. 00000010: ffff3210 83d00437 c0700000 00000000 .2..7.....p..... 00000020: 02010004 0000000f 0000000f 00004002 .............@.. 00000030: 00000fff 00000000 ........ Link: http://lkml.kernel.org/r/1573130738-29390-1-git-send-email-piotrx.maziarz@linux.intel.com Signed-off-by: Piotr Maziarz <piotrx.maziarz@linux.intel.com> Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-11-14lib/bsearch: Use generic type for comparator functionAndy Shevchenko1-1/+1
Comparator function type, cmp_func_t, is defined in the types.h, use it in bsearch() and, thus, add more sense to the corresponding comment in the code. Link: http://lkml.kernel.org/r/20191007135656.37734-2-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-11-14lib/sort: Move swap, cmp and cmp_r function types for wider useAndy Shevchenko1-10/+5
The function types for swap, cmp and cmp_r functions are already being in use by modules. Move them to types.h that everybody in kernel will be able to use generic types instead of custom ones. This adds more sense to the comment in bsearch() later on. Link: http://lkml.kernel.org/r/20191007135656.37734-1-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-11-15kbuild: move headers_check rule to usr/include/MakefileMasahiro Yamada1-11/+0
Currently, some sanity checks for uapi headers are done by scripts/headers_check.pl, which is wired up to the 'headers_check' target in the top Makefile. It is true compiling headers has better test coverage, but there are still several headers excluded from the compile test. I like to keep headers_check.pl for a while, but we can delete a lot of code by moving the build rule to usr/include/Makefile. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-11-13sbitmap: Delete sbitmap_any_bit_clear()John Garry1-17/+0
Since the only caller of this function has been deleted, delete this one also. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-11-11Merge tag 'hisi-drivers-for-5.5' of git://github.com/hisilicon/linux-hisi ↵Olof Johansson2-7/+9
into arm/drivers ARM64: hisi: SoC driver updates for 5.5 - check the LOGIC_PIO_INDIRECT region ops at registration instead of in the IO port accessors to optimise the lib/ligic_pio.c - add the hisi LPC driver to the build test for the other architectures except ALPHA, C6X, HEXAGON and PARISC as they do not define {read,write}sb by updating the hisi LPC Kconfig and adding a dummy PIO_INDIRECT_SIZE - clean the sparse complains of the hisi LPC driver - build logic_pio into a lib to avoid including in the vmlinux when not referenced * tag 'hisi-drivers-for-5.5' of git://github.com/hisilicon/linux-hisi: logic_pio: Build into a library bus: hisi_lpc: Expand build test coverage bus: hisi_lpc: Clean some types logic_pio: Define PIO_INDIRECT_SIZE for !CONFIG_INDIRECT_PIO lib: logic_pio: Enforce LOGIC_PIO_INDIRECT region ops are set at registration Link: https://lore.kernel.org/r/5DC959B9.80301@hisilicon.com Signed-off-by: Olof Johansson <olof@lixom.net>
2019-11-11lib: provide a simple generic ioremap implementationChristoph Hellwig2-0/+42
A lot of architectures reuse the same simple ioremap implementation, so start lifting the most simple variant to lib/ioremap.c. It provides ioremap_prot and iounmap, plus a default ioremap that uses prot_noncached, although that can be overridden by asm/io.h. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Palmer Dabbelt <palmer@dabbelt.com>
2019-11-11lib: devres: add a helper function for ioremap_ucTuowen Zhao1-0/+19
Implement a resource managed strongly uncachable ioremap function. Cc: <stable@vger.kernel.org> # v4.19+ Tested-by: AceLan Kao <acelan.kao@canonical.com> Signed-off-by: Tuowen Zhao <ztuowen@gmail.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2019-11-10lib: Remove select of inexistant GENERIC_IOCorentin Labbe1-1/+0
config option GENERIC_IO was removed but still selected by lib/kconfig This patch finish the cleaning. Fixes: 9de8da47742b ("kconfig: kill off GENERIC_IO option") Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Corentin Labbe <clabbe@baylibre.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-11-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller5-22/+46
One conflict in the BPF samples Makefile, some fixes in 'net' whilst we were converting over to Makefile.target rules in 'net-next'. Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-08XArray: Fix xas_pause at ULONG_MAXMatthew Wilcox (Oracle)2-3/+27
If we were unlucky enough to call xas_pause() when the index was at ULONG_MAX (or a multi-slot entry which ends at ULONG_MAX), we would wrap the index back around to 0 and restart the iteration from the beginning. Use the XAS_BOUNDS state to indicate that we should just stop the iteration. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
2019-11-08Merge tag 'xarray-5.4' of git://git.infradead.org/users/willy/linux-daxLinus Torvalds4-21/+40
Pull XArray fixes from Matthew Wilcox: "These all fix various bugs, some of which people have tripped over and some of which have been caught by automatic tools" * tag 'xarray-5.4' of git://git.infradead.org/users/willy/linux-dax: idr: Fix idr_alloc_u32 on 32-bit systems idr: Fix integer overflow in idr_for_each_entry radix tree: Remove radix_tree_iter_find idr: Fix idr_get_next_ul race with idr_remove XArray: Fix xas_next() with a single entry at 0
2019-11-07lib: Uplevel the pmem "region" ida to a global allocatorDan Williams3-0/+22
In preparation for handling platform differentiated memory types beyond persistent memory, uplevel the "region" identifier to a global number space. This enables a device-dax instance to be registered to any memory type with guaranteed unique names. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-11-06dump_stack: avoid the livelock of the dump_lockKevin Hao1-1/+6
In the current code, we use the atomic_cmpxchg() to serialize the output of the dump_stack(), but this implementation suffers the thundering herd problem. We have observed such kind of livelock on a Marvell cn96xx board(24 cpus) when heavily using the dump_stack() in a kprobe handler. Actually we can let the competitors to wait for the releasing of the lock before jumping to atomic_cmpxchg(). This will definitely mitigate the thundering herd problem. Thanks Linus for the suggestion. [akpm@linux-foundation.org: fix comment] Link: http://lkml.kernel.org/r/20191030031637.6025-1-haokexin@gmail.com Fixes: b58d977432c8 ("dump_stack: serialize the output from dump_stack()") Signed-off-by: Kevin Hao <haokexin@gmail.com> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-11-05lib: devres: provide devm_ioremap_resource_wc()Bartosz Golaszewski1-0/+15
Provide a variant of devm_ioremap_resource() for write-combined ioremap. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20191022084318.22256-4-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-11-05lib: devres: prepare devm_ioremap_resource() for more variantsBartosz Golaszewski1-20/+27
We want to add the write-combined variant of devm_ioremap_resource(). Let's first implement __devm_ioremap_resource() which takes an additional argument type. The types are the same as for __devm_ioremap(). The existing devm_ioremap_resource() now simply calls __devm_ioremap_resource() with regular DEVM_IOREMAP type. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20191022084318.22256-3-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-11-05logic_pio: Build into a libraryJohn Garry1-1/+1
Object file logic_pio.o is always built. Ideally the object file should only be built when required. This is tricky, as that would be for archs which define PCI_IOBASE, but no common config option exists for that. For now, continue to always build but at least ensure the symbols are not included in the vmlinux when not referenced. Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Wei Xu <xuwei5@hisilicon.com>
2019-11-05lib: logic_pio: Enforce LOGIC_PIO_INDIRECT region ops are set at registrationJohn Garry1-6/+8
Since the only LOGIC_PIO_INDIRECT host (hisi-lpc) now sets the ops prior to registration, enforce this check for accessors ops at registration instead of in the IO port accessors to simplify and marginally optimise the code. A slight misalignment is also tidied. Also add myself as an author. Suggested-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Wei Xu <xuwei5@hisilicon.com>
2019-11-03idr: Fix idr_alloc_u32 on 32-bit systemsMatthew Wilcox (Oracle)1-1/+1
Attempting to allocate an entry at 0xffffffff when one is already present would succeed in allocating one at 2^32, which would confuse everything. Return -ENOSPC in this case, as expected. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
2019-11-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller1-9/+103
Alexei Starovoitov says: ==================== pull-request: bpf-next 2019-11-02 The following pull-request contains BPF updates for your *net-next* tree. We've added 30 non-merge commits during the last 7 day(s) which contain a total of 41 files changed, 1864 insertions(+), 474 deletions(-). The main changes are: 1) Fix long standing user vs kernel access issue by introducing bpf_probe_read_user() and bpf_probe_read_kernel() helpers, from Daniel. 2) Accelerated xskmap lookup, from Björn and Maciej. 3) Support for automatic map pinning in libbpf, from Toke. 4) Cleanup of BTF-enabled raw tracepoints, from Alexei. 5) Various fixes to libbpf and selftests. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-01idr: Fix idr_get_next_ul race with idr_removeMatthew Wilcox (Oracle)1-20/+11
Commit 5c089fd0c734 ("idr: Fix idr_get_next race with idr_remove") neglected to fix idr_get_next_ul(). As far as I can tell, nobody's actually using this interface under the RCU read lock, but fix it now before anybody decides to use it. Fixes: 5c089fd0c734 ("idr: Fix idr_get_next race with idr_remove") Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
2019-11-01lib/list-test: add a test for the 'list' doubly linked listDavid Gow3-0/+767
Add a KUnit test for the kernel doubly linked list implementation in include/linux/list.h Each test case (list_test_x) is focused on testing the behaviour of the list function/macro 'x'. None of the tests pass invalid lists to these macros, and so should behave identically with DEBUG_LIST enabled and disabled. Note that, at present, it only tests the list_ types (not the singly-linked hlist_), and does not yet test all of the list_for_each_entry* macros (and some related things like list_prepare_entry). Ignoring checkpatch.pl spurious errors related to its handling of for_each and other list macros. checkpatch.pl expects anything with for_each in its name to be a loop and expects that the open brace is placed on the same line as for a for loop. In this case, test case naming scheme includes name of the macro it is testing, which results in the spurious errors. Commit message updated by Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: David Gow <davidgow@google.com> Reviewed-by: Brendan Higgins <brendanhiggins@google.com> Tested-by: Brendan Higgins <brendanhiggins@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2019-11-01livepatch: Selftests of the API for tracking system state changesPetr Mladek4-1/+362
Four selftests for the new API. Link: http://lkml.kernel.org/r/20191030154313.13263-6-pmladek@suse.com To: Jiri Kosina <jikos@kernel.org> Cc: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Cc: Nicolai Stange <nstange@suse.de> Cc: live-patching@vger.kernel.org Cc: linux-kernel@vger.kernel.org Acked-by: Miroslav Benes <mbenes@suse.cz> Acked-by: Joe Lawrence <joe.lawrence@redhat.com> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Petr Mladek <pmladek@suse.com>
2019-10-31pipe: Use head and tail pointers for the ring, not cursor and lengthDavid Howells1-118/+151
Convert pipes to use head and tail pointers for the buffer ring rather than pointer and length as the latter requires two atomic ops to update (or a combined op) whereas the former only requires one. (1) The head pointer is the point at which production occurs and points to the slot in which the next buffer will be placed. This is equivalent to pipe->curbuf + pipe->nrbufs. The head pointer belongs to the write-side. (2) The tail pointer is the point at which consumption occurs. It points to the next slot to be consumed. This is equivalent to pipe->curbuf. The tail pointer belongs to the read-side. (3) head and tail are allowed to run to UINT_MAX and wrap naturally. They are only masked off when the array is being accessed, e.g.: pipe->bufs[head & mask] This means that it is not necessary to have a dead slot in the ring as head == tail isn't ambiguous. (4) The ring is empty if "head == tail". A helper, pipe_empty(), is provided for this. (5) The occupancy of the ring is "head - tail". A helper, pipe_occupancy(), is provided for this. (6) The number of free slots in the ring is "pipe->ring_size - occupancy". A helper, pipe_space_for_user() is provided to indicate how many slots userspace may use. (7) The ring is full if "head - tail >= pipe->ring_size". A helper, pipe_full(), is provided for this. Signed-off-by: David Howells <dhowells@redhat.com>
2019-10-30bpf, testing: Introduce 'gso_linear_no_head_frag' skb_segment testShmulik Ladkani1-0/+63
Following reports of skb_segment() hitting a BUG_ON when working on GROed skbs which have their gso_size mangled (e.g. after a bpf_skb_change_proto call), add a reproducer test that mimics the input skbs that lead to the mentioned BUG_ON as in [1] and validates the fix submitted in [2]. [1] https://lists.openwall.net/netdev/2019/08/26/110 [2] commit 3dcbdb134f32 ("net: gso: Fix skb_segment splat when splitting gso_size mangled skb having linear-headed frag_list") Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20191025134223.2761-3-shmulik.ladkani@gmail.com
2019-10-30bpf, testing: Refactor test_skb_segment() for testing skb_segment() on ↵Shmulik Ladkani1-10/+41
different skbs Currently, test_skb_segment() builds a single test skb and runs skb_segment() on it. Extend test_skb_segment() so it processes an array of numerous skb/feature pairs to test. Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20191025134223.2761-2-shmulik.ladkani@gmail.com
2019-10-29Merge tag 'v5.4-rc4' into docs-nextJonathan Corbet8-51/+260
I need to pick up the independent changes made to Documentation/core-api/memory-allocation.rst to be able to merge further work without creating a total mess.
2019-10-28ubsan, x86: Annotate and allow __ubsan_handle_shift_out_of_bounds() in ↵Peter Zijlstra1-1/+4
uaccess regions The new check_zeroed_user() function uses variable shifts inside of a user_access_begin()/user_access_end() section and that results in GCC emitting __ubsan_handle_shift_out_of_bounds() calls, even though through value range analysis it would be able to see that the UB in question is impossible. Annotate and whitelist this UBSAN function; continued use of user_access_begin()/user_access_end() will undoubtedly result in further uses of function. Reported-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: cyphar@cyphar.com Cc: keescook@chromium.org Cc: linux@rasmusvillemoes.dk Fixes: f5a1a536fa14 ("lib: introduce copy_struct_from_user() helper") Link: https://lkml.kernel.org/r/20191021131149.GA19358@hirez.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-10-23compat_ioctl: reimplement SG_IO handlingArnd Bergmann1-0/+1
There are two code locations that implement the SG_IO ioctl: the old sg.c driver, and the generic scsi_ioctl helper that is in turn used by multiple drivers. To eradicate the old compat_ioctl conversion handler for the SG_IO command, I implement a readable pair of put_sg_io_hdr() /get_sg_io_hdr() helper functions that can be used for both compat and native mode, and then I call this from both drivers. For the iovec handling, there is already a compat_import_iovec() function that can simply be called in place of import_iovec(). To avoid having to pass the compat/native state through multiple indirections, I mark the SG_IO command itself as compatible in fs/compat_ioctl.c and use in_compat_syscall() to figure out where we are called from. As a side-effect of this, the sg.c driver now also accepts the 32-bit sg_io_hdr format in compat mode using the read/write interface, not just ioctl. This should improve compatiblity with old 32-bit binaries, but it would break if any application intentionally passes the 64-bit data structure in compat mode here. Steffen Maier helped debug an issue in an earlier version of this patch. Cc: Steffen Maier <maier@linux.ibm.com> Cc: linux-scsi@vger.kernel.org Cc: Doug Gilbert <dgilbert@interlog.com> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-10-23lib/vdso: Make clock_getres() POSIX compliant againThomas Gleixner1-4/+5
A recent commit removed the NULL pointer check from the clock_getres() implementation causing a test case to fault. POSIX requires an explicit NULL pointer check for clock_getres() aside of the validity check of the clock_id argument for obscure reasons. Add it back for both 32bit and 64bit. Note, this is only a partial revert of the offending commit which does not bring back the broken fallback invocation in the the 32bit compat implementations of clock_getres() and clock_gettime(). Fixes: a9446a906f52 ("lib/vdso/32: Remove inconsistent NULL pointer checks") Reported-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Christophe Leroy <christophe.leroy@c-s.fr> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1910211202260.1904@nanos.tec.linutronix.de
2019-10-18Merge tag 'copy-struct-from-user-v5.4-rc4' of ↵Linus Torvalds1-9/+28
gitolite.kernel.org:pub/scm/linux/kernel/git/brauner/linux Pull usercopy test fixlets from Christian Brauner: "This contains two improvements for the copy_struct_from_user() tests: - a coding style change to get rid of the ugly "if ((ret |= test()))" pointed out when pulling the original patchset. - avoid a soft lockups when running the usercopy tests on machines with large page sizes by scanning only a 1024 byte region" * tag 'copy-struct-from-user-v5.4-rc4' of gitolite.kernel.org:pub/scm/linux/kernel/git/brauner/linux: usercopy: Avoid soft lockups in test_check_nonzero_user() lib: test_user_copy: style cleanup
2019-10-18Merge branch 'for-5.5-pr-warn' into for-5.5Petr Mladek1-1/+1
2019-10-18lib: cpu_rmap: Use pr_warn instead of pr_warningKefeng Wang1-1/+1
As said in commit f2c2cbcc35d4 ("powerpc: Use pr_warn instead of pr_warning"), removing pr_warning so all logging messages use a consistent <prefix>_warn style. Let's do it. Link: http://lkml.kernel.org/r/20191018031850.48498-27-wangkefeng.wang@huawei.com To: linux-kernel@vger.kernel.org Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Petr Mladek <pmladek@suse.com>
2019-10-17printf: add support for printing symbolic error namesRasmus Villemoes5-0/+281
It has been suggested several times to extend vsnprintf() to be able to convert the numeric value of ENOSPC to print "ENOSPC". This implements that as a %p extension: With %pe, one can do if (IS_ERR(foo)) { pr_err("Sorry, can't do that: %pe\n", foo); return PTR_ERR(foo); } instead of what is seen in quite a few places in the kernel: if (IS_ERR(foo)) { pr_err("Sorry, can't do that: %ld\n", PTR_ERR(foo)); return PTR_ERR(foo); } If the value passed to %pe is an ERR_PTR, but the library function errname() added here doesn't know about the value, the value is simply printed in decimal. If the value passed to %pe is not an ERR_PTR, we treat it as an ordinary %p and thus print the hashed value (passing non-ERR_PTR values to %pe indicates a bug in the caller, but we can't do much about that). With my embedded hat on, and because it's not very invasive to do, I've made it possible to remove this. The errname() function and associated lookup tables take up about 3K. For most, that's probably quite acceptable and a price worth paying for more readable dmesg (once this starts getting used), while for those that disable printk() it's of very little use - I don't see a procfs/sysfs/seq_printf() file reasonably making use of this - and they clearly want to squeeze vmlinux as much as possible. Hence the default y if PRINTK. The symbols to include have been found by massaging the output of find arch include -iname 'errno*.h' | xargs grep -E 'define\s*E' In the cases where some common aliasing exists (e.g. EAGAIN=EWOULDBLOCK on all platforms, EDEADLOCK=EDEADLK on most), I've moved the more popular one (in terms of 'git grep -w Efoo | wc) to the bottom so that one takes precedence. Link: http://lkml.kernel.org/r/20191015190706.15989-1-linux@rasmusvillemoes.dk To: "Jonathan Corbet" <corbet@lwn.net> To: linux-kernel@vger.kernel.org Cc: "Andy Shevchenko" <andy.shevchenko@gmail.com> Cc: "Andrew Morton" <akpm@linux-foundation.org> Cc: "Joe Perches" <joe@perches.com> Cc: linux-doc@vger.kernel.org Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Acked-by: Uwe Kleine-König <uwe@kleine-koenig.org> Reviewed-by: Petr Mladek <pmladek@suse.com> [andy.shevchenko@gmail.com: use abs()] Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Petr Mladek <pmladek@suse.com>
2019-10-16usercopy: Avoid soft lockups in test_check_nonzero_user()Michael Ellerman1-3/+19
On a machine with a 64K PAGE_SIZE, the nested for loops in test_check_nonzero_user() can lead to soft lockups, eg: watchdog: BUG: soft lockup - CPU#4 stuck for 22s! [modprobe:611] Modules linked in: test_user_copy(+) vmx_crypto gf128mul crc32c_vpmsum virtio_balloon ip_tables x_tables autofs4 CPU: 4 PID: 611 Comm: modprobe Tainted: G L 5.4.0-rc1-gcc-8.2.0-00001-gf5a1a536fa14-dirty #1151 ... NIP __might_sleep+0x20/0xc0 LR __might_fault+0x40/0x60 Call Trace: check_zeroed_user+0x12c/0x200 test_user_copy_init+0x67c/0x1210 [test_user_copy] do_one_initcall+0x60/0x340 do_init_module+0x7c/0x2f0 load_module+0x2d94/0x30e0 __do_sys_finit_module+0xc8/0x150 system_call+0x5c/0x68 Even with a 4K PAGE_SIZE the test takes multiple seconds. Instead tweak it to only scan a 1024 byte region, but make it cross the page boundary. Fixes: f5a1a536fa14 ("lib: introduce copy_struct_from_user() helper") Suggested-by: Aleksa Sarai <cyphar@cyphar.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Aleksa Sarai <cyphar@cyphar.com> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Link: https://lore.kernel.org/r/20191016122732.13467-1-mpe@ellerman.id.au Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
2019-10-14lib/test_meminit: add a kmem_cache_alloc_bulk() testAlexander Potapenko1-0/+27
Make sure allocations from kmem_cache_alloc_bulk() and kmem_cache_free_bulk() are properly initialized. Link: http://lkml.kernel.org/r/20191007091605.30530-2-glider@google.com Signed-off-by: Alexander Potapenko <glider@google.com> Cc: Kees Cook <keescook@chromium.org> Cc: Christoph Lameter <cl@linux.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Thibaut Sautereau <thibaut@sautereau.fr> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-14lib/generic-radix-tree.c: add kmemleak annotationsEric Biggers1-6/+26
Kmemleak is falsely reporting a leak of the slab allocation in sctp_stream_init_ext(): BUG: memory leak unreferenced object 0xffff8881114f5d80 (size 96): comm "syz-executor934", pid 7160, jiffies 4294993058 (age 31.950s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000ce7a1326>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline] [<00000000ce7a1326>] slab_post_alloc_hook mm/slab.h:439 [inline] [<00000000ce7a1326>] slab_alloc mm/slab.c:3326 [inline] [<00000000ce7a1326>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 [<000000007abb7ac9>] kmalloc include/linux/slab.h:547 [inline] [<000000007abb7ac9>] kzalloc include/linux/slab.h:742 [inline] [<000000007abb7ac9>] sctp_stream_init_ext+0x2b/0xa0 net/sctp/stream.c:157 [<0000000048ecb9c1>] sctp_sendmsg_to_asoc+0x946/0xa00 net/sctp/socket.c:1882 [<000000004483ca2b>] sctp_sendmsg+0x2a8/0x990 net/sctp/socket.c:2102 [...] But it's freed later. Kmemleak misses the allocation because its pointer is stored in the generic radix tree sctp_stream::out, and the generic radix tree uses raw pages which aren't tracked by kmemleak. Fix this by adding the kmemleak hooks to the generic radix tree code. Link: http://lkml.kernel.org/r/20191004065039.727564-1-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com> Reported-by: <syzbot+7f3b6b106be8dcdcdeec@syzkaller.appspotmail.com> Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Kent Overstreet <kent.overstreet@gmail.com> Cc: Vlad Yasevich <vyasevich@gmail.com> Cc: Xin Long <lucien.xin@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-14PCI: Add PCI_STD_NUM_BARS for the number of standard BARsDenis Efremov1-1/+1
Code that iterates over all standard PCI BARs typically uses PCI_STD_RESOURCE_END. However, that requires the unusual test "i <= PCI_STD_RESOURCE_END" rather than something the typical "i < PCI_STD_NUM_BARS". Add a definition for PCI_STD_NUM_BARS and change loops to use the more idiomatic C style to help avoid fencepost errors. Link: https://lore.kernel.org/r/20190927234026.23342-1-efremov@linux.com Link: https://lore.kernel.org/r/20190927234308.23935-1-efremov@linux.com Link: https://lore.kernel.org/r/20190916204158.6889-3-efremov@linux.com Signed-off-by: Denis Efremov <efremov@linux.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Sebastian Ott <sebott@linux.ibm.com> # arch/s390/ Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> # video/fbdev/ Acked-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> # pci/controller/dwc/ Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com> # scsi/pm8001/ Acked-by: Martin K. Petersen <martin.petersen@oracle.com> # scsi/pm8001/ Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # memstick/
2019-10-12Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds1-21/+0
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Ingo Molnar: "A handful of fixes: a kexec linking fix, an AMD MWAITX fix, a vmware guest support fix when built under Clang, and new CPU model number definitions" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/cpu: Add Comet Lake to the Intel CPU models header lib/string: Make memzero_explicit() inline instead of external x86/cpu/vmware: Use the full form of INL in VMWARE_PORT x86/asm: Fix MWAITX C-state hint value
2019-10-11lib/test_printf: Add tests for %pfw printk modifierSakari Ailus1-0/+32
Add a test for the %pfw printk modifier using software nodes. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-10-11lib/vsprintf: Add %pfw conversion specifier for printing fwnode namesSakari Ailus1-0/+36
Add support for %pfw conversion specifier (with "f" and "P" modifiers) to support printing full path of the node, including its name ("f") and only the node's name ("P") in the printk family of functions. The two flags have equivalent functionality to existing %pOF with the same two modifiers ("f" and "P") on OF based systems. The ability to do the same on ACPI based systems is added by this patch. On ACPI based systems the resulting strings look like \_SB.PCI0.CIO2.port@1.endpoint@0 where the nodes are separated by a dot (".") and the first three are ACPI device nodes and the latter two ACPI data nodes. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-10-11lib/vsprintf: OF nodes are first and foremost, struct device_nodesSakari Ailus1-12/+4
Factor out static kobject_string() function that simply calls device_node_string(), and thus remove references to kobjects (as these are struct device_node). Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-10-11lib/vsprintf: Make use of fwnode API to obtain node names and separatorsSakari Ailus1-22/+17
Instead of implementing our own means of discovering parent nodes, node names or counting how many parents a node has, use the newly added functions in the fwnode API to obtain that information. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-10-11lib/vsprintf: Add a note on re-using %pf or %pFSakari Ailus1-0/+2
Add a note warning of re-use of obsolete %pf or %pF extensions. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Suggested-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-10-11lib/vsprintf: Remove support for %pF and %pf in favour of %pS and %psSakari Ailus1-8/+2
%pS and %ps are now the preferred conversion specifiers to print function names. The functionality is equivalent; remove the old, deprecated %pF and %pf support. Depends-on: commit 2d44d165e939 ("scsi: lpfc: Convert existing %pf users to %ps") Depends-on: commit b295c3e39c13 ("tools lib traceevent: Convert remaining %p[fF] users to %p[sS]") Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-10-09Merge tag 'arm64-fixes' of ↵Linus Torvalds1-9/+0
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Will Deacon: "A larger-than-usual batch of arm64 fixes for -rc3. The bulk of the fixes are dealing with a bunch of issues with the build system from the compat vDSO, which unfortunately led to some significant Makefile rework to manage the horrible combinations of toolchains that we can end up needing to drive simultaneously. We came close to disabling the thing entirely, but Vincenzo was quick to spin up some patches and I ended up picking up most of the bits that were left [*]. Future work will look at disentangling the header files properly. Other than that, we have some important fixes all over, including one papering over the miscompilation fallout from forcing CONFIG_OPTIMIZE_INLINING=y, which I'm still unhappy about. Harumph. We've still got a couple of open issues, so I'm expecting to have some more fixes later this cycle. Summary: - Numerous fixes to the compat vDSO build system, especially when combining gcc and clang - Fix parsing of PAR_EL1 in spurious kernel fault detection - Partial workaround for Neoverse-N1 erratum #1542419 - Fix IRQ priority masking on entry from compat syscalls - Fix advertisment of FRINT HWCAP to userspace - Attempt to workaround inlining breakage with '__always_inline' - Fix accidental freeing of parent SVE state on fork() error path - Add some missing NULL pointer checks in instruction emulation init - Some formatting and comment fixes" [*] Will's final fixes were Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com> but they were already in linux-next by then and he didn't rebase just to add those. * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (21 commits) arm64: armv8_deprecated: Checking return value for memory allocation arm64: Kconfig: Make CONFIG_COMPAT_VDSO a proper Kconfig option arm64: vdso32: Rename COMPATCC to CC_COMPAT arm64: vdso32: Pass '--target' option to clang via VDSO_CAFLAGS arm64: vdso32: Don't use KBUILD_CPPFLAGS unconditionally arm64: vdso32: Move definition of COMPATCC into vdso32/Makefile arm64: Default to building compat vDSO with clang when CONFIG_CC_IS_CLANG lib: vdso: Remove CROSS_COMPILE_COMPAT_VDSO arm64: vdso32: Remove jump label config option in Makefile arm64: vdso32: Detect binutils support for dmb ishld arm64: vdso: Remove stale files from old assembly implementation arm64: vdso32: Fix broken compat vDSO build warnings arm64: mm: fix spurious fault detection arm64: ftrace: Ensure synchronisation in PLT setup for Neoverse-N1 #1542419 arm64: Fix incorrect irqflag restore for priority masking for compat arm64: mm: avoid virt_to_phys(init_mm.pgd) arm64: cpufeature: Effectively expose FRINT capability to userspace arm64: Mark functions using explicit register variables as '__always_inline' docs: arm64: Fix indentation and doc formatting arm64/sve: Fix wrong free for task->thread.sve_state ...
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