On 03/28/2019 10:38 AM, Jiufei Xue wrote: > 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@xxxxxxxxxxxxxxxxx> Patch queued for v5.2, thanks. Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics
