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| author | Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com> | 2022-11-25 21:07:45 -0800 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2022-12-05 13:54:29 +0100 |
| commit | 8b997b2bb2c53b76a6db6c195930e9ab8e4b0c79 (patch) | |
| tree | f309026b6174a2fa4399b370c6169e44fb9ecb74 /drivers/block/xen-blkback | |
| parent | ca84ce153d887b1dc8b118029976cc9faf2a9b40 (diff) | |
xen/privcmd: Fix a possible warning in privcmd_ioctl_mmap_resource()
As 'kdata.num' is user-controlled data, if user tries to allocate
memory larger than(>=) MAX_ORDER, then kcalloc() will fail, it
creates a stack trace and messes up dmesg with a warning.
Call trace:
-> privcmd_ioctl
--> privcmd_ioctl_mmap_resource
Add __GFP_NOWARN in order to avoid too large allocation warning.
This is detected by static analysis using smatch.
Fixes: 3ad0876554ca ("xen/privcmd: add IOCTL_PRIVCMD_MMAP_RESOURCE")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20221126050745.778967-1-harshit.m.mogalapalli@oracle.com
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'drivers/block/xen-blkback')
0 files changed, 0 insertions, 0 deletions