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| author | Jiufei Xue <jiufei.xue@linux.alibaba.com> | 2019-04-11 19:25:12 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2019-04-11 19:25:12 +0200 |
| commit | 8c40292be9169a9cbe19aadd1a6fc60cbd1af82f (patch) | |
| tree | 1291cb8fcedef150dd21f93589a996f9d1775462 /drivers/video | |
| parent | a6fdbd551573d9e303823c93075c0f0edff8d98e (diff) | |
| download | linux-8c40292be9169a9cbe19aadd1a6fc60cbd1af82f.tar.gz linux-8c40292be9169a9cbe19aadd1a6fc60cbd1af82f.tar.bz2 linux-8c40292be9169a9cbe19aadd1a6fc60cbd1af82f.zip | |
fbdev: fix WARNING in __alloc_pages_nodemask bug
Syzkaller hit 'WARNING in __alloc_pages_nodemask' bug.
WARNING: CPU: 1 PID: 1473 at mm/page_alloc.c:4377
__alloc_pages_nodemask+0x4da/0x2130
Kernel panic - not syncing: panic_on_warn set ...
Call Trace:
alloc_pages_current+0xb1/0x1e0
kmalloc_order+0x1f/0x60
kmalloc_order_trace+0x1d/0x120
fb_alloc_cmap_gfp+0x85/0x2b0
fb_set_user_cmap+0xff/0x370
do_fb_ioctl+0x949/0xa20
fb_ioctl+0xdd/0x120
do_vfs_ioctl+0x186/0x1070
ksys_ioctl+0x89/0xa0
__x64_sys_ioctl+0x74/0xb0
do_syscall_64+0xc8/0x550
entry_SYSCALL_64_after_hwframe+0x49/0xbe
This is a warning about order >= MAX_ORDER and the order is from
userspace ioctl. Add flag __NOWARN to silence this warning.
Signed-off-by: Jiufei Xue <jiufei.xue@linux.alibaba.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/fbdev/core/fbcmap.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/video/fbdev/core/fbcmap.c b/drivers/video/fbdev/core/fbcmap.c index 68a113594808..2811c4afde01 100644 --- a/drivers/video/fbdev/core/fbcmap.c +++ b/drivers/video/fbdev/core/fbcmap.c @@ -94,6 +94,8 @@ int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags) int size = len * sizeof(u16); int ret = -ENOMEM; + flags |= __GFP_NOWARN; + if (cmap->len != len) { fb_dealloc_cmap(cmap); if (!len) |