kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 21756 Comm: syz-executor5 Not tainted 4.20.0-rc1-next-20181109+ #110 kobject: 'loop1' (00000000ea6a2ad9): kobject_uevent_env Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__find_plane_by_offset drivers/media/common/videobuf2/videobuf2-core.c:2006 [inline] RIP: 0010:vb2_mmap+0x23c/0x6f0 drivers/media/common/videobuf2/videobuf2-core.c:2128 Code: 80 3c 10 00 0f 85 1b 04 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b 45 b8 48 8b 00 48 8d 78 14 48 89 45 d0 48 89 f8 48 c1 e8 03 <0f> b6 14 08 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 fa kobject: 'loop1' (00000000ea6a2ad9): fill_kobj_path: path = '/devices/virtual/block/loop1' RSP: 0018:ffff88017a5bf7d0 EFLAGS: 00010203 RAX: 0000000000000002 RBX: 0000000000000009 RCX: dffffc0000000000 RDX: dffffc0000000000 RSI: ffffffff854c01c0 RDI: 0000000000000014 RBP: ffff88017a5bf820 R08: ffff88017ba0a140 R09: ffffed00397fb356 R10: ffffed00397fb356 R11: ffff8801cbfd9ab7 R12: 0000000000000000 kobject: '0:44' (0000000037e65f99): kobject_uevent_env R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801cb7e7268 FS: 00007f39ecc1d700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001cfde80 CR3: 00000001ceb96000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: '0:44' (0000000037e65f99): fill_kobj_path: path = '/devices/virtual/bdi/0:44' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kobject: '0:44' (0000000037e65f99): kobject_cleanup, parent (null) vb2_fop_mmap+0x4b/0x70 drivers/media/common/videobuf2/videobuf2-v4l2.c:999 v4l2_mmap+0x153/0x200 drivers/media/v4l2-core/v4l2-dev.c:401 call_mmap include/linux/fs.h:1872 [inline] mmap_region+0xe85/0x1cd0 mm/mmap.c:1786 kobject: '0:44' (0000000037e65f99): calling ktype release kobject: '0:44': free name kobject: 'loop4' (00000000e44ef701): kobject_uevent_env kobject: 'loop4' (00000000e44ef701): fill_kobj_path: path = '/devices/virtual/block/loop4' do_mmap+0xa22/0x1230 mm/mmap.c:1559 kobject: '0:44' (0000000042340679): kobject_add_internal: parent: 'bdi', set: 'devices' do_mmap_pgoff include/linux/mm.h:2328 [inline] vm_mmap_pgoff+0x213/0x2c0 mm/util.c:350 kobject: '0:44' (0000000042340679): kobject_uevent_env kobject: '0:44' (0000000042340679): fill_kobj_path: path = '/devices/virtual/bdi/0:44' ksys_mmap_pgoff+0x4da/0x660 mm/mmap.c:1609 kobject: '0:45' (0000000017017fa3): kobject_add_internal: parent: 'bdi', set: 'devices' kobject: '0:45' (0000000017017fa3): kobject_uevent_env __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 kobject: '0:45' (0000000017017fa3): fill_kobj_path: path = '/devices/virtual/bdi/0:45' entry_SYSCALL_64_after_hwframe+0x49/0xbe kobject: 'loop1' (00000000ea6a2ad9): kobject_uevent_env RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f39ecc1cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457569 RDX: fffffffffffffffd RSI: 0000000000002000 RDI: 0000000020ffe000 kobject: 'loop1' (00000000ea6a2ad9): fill_kobj_path: path = '/devices/virtual/block/loop1' RBP: 000000000072bfa0 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000000000011 R11: 0000000000000246 R12: 00007f39ecc1d6d4 R13: 00000000004c2b5d R14: 00000000004d4828 R15: 00000000ffffffff kobject: 'loop2' (00000000b8477e9b): kobject_uevent_env Modules linked in: ---[ end trace f6e6afdc1a52bdd8 ]--- kobject: '0:45' (0000000017017fa3): kobject_uevent_env RIP: 0010:__find_plane_by_offset drivers/media/common/videobuf2/videobuf2-core.c:2006 [inline] RIP: 0010:vb2_mmap+0x23c/0x6f0 drivers/media/common/videobuf2/videobuf2-core.c:2128 kobject: 'loop2' (00000000b8477e9b): fill_kobj_path: path = '/devices/virtual/block/loop2' Code: 80 3c 10 00 0f 85 1b 04 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b 45 b8 48 8b 00 48 8d 78 14 48 89 45 d0 48 89 f8 48 c1 e8 03 <0f> b6 14 08 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 fa kobject: 'loop3' (000000006d0ad9a1): kobject_uevent_env RSP: 0018:ffff88017a5bf7d0 EFLAGS: 00010203 syz-executor0 invoked oom-killer: gfp_mask=0x6000c0(GFP_KERNEL), nodemask=(null), order=0, oom_score_adj=1000 RAX: 0000000000000002 RBX: 0000000000000009 RCX: dffffc0000000000 kobject: 'loop3' (000000006d0ad9a1): fill_kobj_path: path = '/devices/virtual/block/loop3' RDX: dffffc0000000000 RSI: ffffffff854c01c0 RDI: 0000000000000014 syz-executor0 cpuset=syz0 mems_allowed=0 RBP: ffff88017a5bf820 R08: ffff88017ba0a140 R09: ffffed00397fb356 kobject: 'loop3' (000000006d0ad9a1): kobject_uevent_env R10: ffffed00397fb356 R11: ffff8801cbfd9ab7 R12: 0000000000000000 CPU: 1 PID: 21779 Comm: syz-executor0 Tainted: G D 4.20.0-rc1-next-20181109+ #110 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801cb7e7268 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 dump_header+0x27b/0xf72 mm/oom_kill.c:441 FS: 00007f39ecc1d700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb0f92aa518 CR3: 00000001ceb96000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400