fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10f/0x159 lib/fault-inject.c:149
 should_failslab+0xdb/0x130 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:421 [inline]
 slab_alloc_node mm/slab.c:3297 [inline]
 kmem_cache_alloc_node_trace+0x280/0x770 mm/slab.c:3659
 __do_kmalloc_node mm/slab.c:3681 [inline]
 __kmalloc_node_track_caller+0x3d/0x80 mm/slab.c:3696
 __kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137
general protection fault: 0000 [#1] PREEMPT SMP KASAN
 __alloc_skb+0xcf/0x500 net/core/skbuff.c:205
Modules linked in:
CPU: 0 PID: 14603 Comm: syz-executor.4 Not tainted 4.14.138 #34
 alloc_skb include/linux/skbuff.h:980 [inline]
 kobject_uevent_env+0x781/0xc23 lib/kobject_uevent.c:479
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a018e5c0 task.stack: ffff8880602f8000
 kobject_uevent+0x20/0x26 lib/kobject_uevent.c:553
RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline]
RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP: 0010:refcount_sub_and_test+0x2b/0xf0 lib/refcount.c:179
 loop_set_fd drivers/block/loop.c:938 [inline]
 lo_ioctl+0x11e7/0x1ce0 drivers/block/loop.c:1407
RSP: 0018:ffff8880602ffb98 EFLAGS: 00010202
 __blkdev_driver_ioctl block/ioctl.c:297 [inline]
 blkdev_ioctl+0x96b/0x1860 block/ioctl.c:594
RAX: dffffc0000000000 RBX: ffff8880956e0c80 RCX: ffffffff842618b0
RDX: 0000000000000004 RSI: 0000000000000020 RDI: 0000000000000001
RBP: ffff8880602ffbc0 R08: 00000000f11ffe5d R09: ffff8880a018ee88
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000020
R13: 0000000000000001 R14: ffff8880956e0c94 R15: 0000000000000000
FS:  00000000023b6940(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000
 block_ioctl+0xde/0x120 fs/block_dev.c:1881
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff79e09d028 CR3: 000000006028e000 CR4: 00000000001406f0
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 refcount_dec_and_test+0x1b/0x20 lib/refcount.c:212
 vb2_vmalloc_put+0x18/0x70 drivers/media/v4l2-core/videobuf2-vmalloc.c:68
 __vb2_buf_mem_free+0x103/0x1e0 drivers/media/v4l2-core/videobuf2-core.c:240
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 __vb2_free_mem drivers/media/v4l2-core/videobuf2-core.c:409 [inline]
 __vb2_queue_free+0x634/0x7d0 drivers/media/v4l2-core/videobuf2-core.c:454
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 vb2_core_queue_release+0x64/0x80 drivers/media/v4l2-core/videobuf2-core.c:2043
 vb2_queue_release drivers/media/v4l2-core/videobuf2-v4l2.c:669 [inline]
 _vb2_fop_release+0x1cf/0x2a0 drivers/media/v4l2-core/videobuf2-v4l2.c:840
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
 vb2_fop_release+0x75/0xc0 drivers/media/v4l2-core/videobuf2-v4l2.c:854
RIP: 0033:0x459697
 vivid_fop_release+0x180/0x3f0 drivers/media/platform/vivid/vivid-core.c:486
RSP: 002b:00007f99ada0aa88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 0000000000459697
RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000000a
 v4l2_release+0xf9/0x190 drivers/media/v4l2-core/v4l2-dev.c:446
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000004
 __fput+0x275/0x7a0 fs/file_table.c:210
R13: 00000000004c8a8d R14: 00000000004df970 R15: 0000000000000003
 ____fput+0x16/0x20 fs/file_table.c:244
 task_work_run+0x114/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x413511
RSP: 002b:00007ffcf0e9ff50 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000413511
RDX: 0000001b2c820000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000010745ce5 R09: 0000000010745ce9
R10: 00007ffcf0ea0030 R11: 0000000000000293 R12: 000000000075bf20
R13: 00000000000ada5b R14: 0000000000761878 R15: ffffffffffffffff
Code: 55 48 89 e5 41 56 41 55 41 89 fd 41 54 49 89 f4 53 48 83 ec 08 e8 d6 66 85 fe 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 
RIP: __read_once_size include/linux/compiler.h:183 [inline] RSP: ffff8880602ffb98
RIP: atomic_read arch/x86/include/asm/atomic.h:27 [inline] RSP: ffff8880602ffb98
RIP: refcount_sub_and_test+0x2b/0xf0 lib/refcount.c:179 RSP: ffff8880602ffb98
kobject: 'loop2' (ffff8880a4a166e0): kobject_uevent_env
---[ end trace 64d0f4ec06f888f0 ]---
kobject: 'loop2' (ffff8880a4a166e0): fill_kobj_path: path = '/devices/virtual/block/loop2'