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| author | Jiufei Xue <jiufei.xue@linux.alibaba.com> | 2019-04-11 20:25:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-31 16:43:12 +0300 |
| commit | e630b9ac9dce61e080d1cea80819f99c67892a48 (patch) | |
| tree | 1c82fd64fb5425b0a84b8485936ce055c1d647c4 /drivers/video | |
| parent | ebe6000e90edd5ee4ad8e88f811f42dd800e17f9 (diff) | |
| download | linux-e630b9ac9dce61e080d1cea80819f99c67892a48.tar.xz | |
fbdev: fix WARNING in __alloc_pages_nodemask bug
commit 8c40292be9169a9cbe19aadd1a6fc60cbd1af82f upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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) |