Hello, syzbot found the following issue on: HEAD commit: 67a9c943 net: validate lwtstate->data before returning fro.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=16191402300000 kernel config: https://syzkaller.appspot.com/x/.config?x=51ea6c9df4ed04c4 dashboard link: https://syzkaller.appspot.com/bug?extid=cb62a9d937430bacc247 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cb62a9d937430bacc247@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: sleeping function called from invalid context at mm/page_alloc.c:5179 in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 8435, name: syz-fuzzer INFO: lockdep is turned off. irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] 0x0 hardirqs last disabled at (0): [<ffffffff814406db>] copy_process+0x1e1b/0x74c0 kernel/fork.c:2061 softirqs last enabled at (0): [<ffffffff8144071c>] copy_process+0x1e5c/0x74c0 kernel/fork.c:2065 softirqs last disabled at (0): [<0000000000000000>] 0x0 CPU: 1 PID: 8435 Comm: syz-fuzzer Tainted: G W 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:96 ___might_sleep.cold+0x1f1/0x237 kernel/sched/core.c:9153 prepare_alloc_pages+0x3da/0x580 mm/page_alloc.c:5179 __alloc_pages+0x12f/0x500 mm/page_alloc.c:5375 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2272 stack_depot_save+0x39d/0x4e0 lib/stackdepot.c:303 save_stack+0x15e/0x1e0 mm/page_owner.c:120 __set_page_owner+0x50/0x290 mm/page_owner.c:181 prep_new_page mm/page_alloc.c:2445 [inline] __alloc_pages_bulk+0x8b9/0x1870 mm/page_alloc.c:5313 alloc_pages_bulk_array_node include/linux/gfp.h:557 [inline] vm_area_alloc_pages mm/vmalloc.c:2775 [inline] __vmalloc_area_node mm/vmalloc.c:2845 [inline] __vmalloc_node_range+0x39d/0x960 mm/vmalloc.c:2947 __vmalloc_node mm/vmalloc.c:2996 [inline] __vmalloc+0x69/0x80 mm/vmalloc.c:3010 snd_dma_alloc_pages+0x433/0x590 sound/core/memalloc.c:150 do_alloc_pages+0x9b/0x160 sound/core/pcm_memory.c:43 snd_pcm_lib_malloc_pages+0x3f6/0x880 sound/core/pcm_memory.c:404 snd_pcm_hw_params+0x1408/0x1990 sound/core/pcm_native.c:705 snd_pcm_kernel_ioctl+0xd1/0x240 sound/core/pcm_native.c:3332 snd_pcm_oss_change_params_locked+0x1958/0x3990 sound/core/oss/pcm_oss.c:947 snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1090 [inline] snd_pcm_oss_make_ready+0xe7/0x1b0 sound/core/oss/pcm_oss.c:1149 snd_pcm_oss_sync+0x1de/0x800 sound/core/oss/pcm_oss.c:1714 snd_pcm_oss_release+0x276/0x300 sound/core/oss/pcm_oss.c:2556 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4af19b Code: fb ff eb bd e8 a6 b6 fb ff e9 61 ff ff ff cc e8 9b 82 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 RSP: 002b:000000c0000db430 EFLAGS: 00000206 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 000000c00001e800 RCX: 00000000004af19b RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 000000c0000db470 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000013e R13: 000000000000013d R14: 0000000000000200 R15: 000000c00045a000 can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
