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: 1 PID: 11174 Comm: syz-executor2 Not tainted 4.20.0-rc1-next-20181107+ #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__x86_indirect_thunk_rbx+0x10/0x20 arch/x86/lib/retpoline.S:33 Code: 90 0f ae e8 eb f9 48 89 04 24 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 e8 07 00 00 00 f3 90 0f ae e8 eb f9 48 89 1c 24 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 e8 07 00 00 00 f3 RSP: 0018:ffff88018212eeb0 EFLAGS: 00010293 RAX: ffff8801d3a68700 RBX: 894cdffffc000000 RCX: ffffffff81ed555d kauditd_printk_skb: 5 callbacks suppressed audit: type=1804 audit(1541617055.394:31): pid=11180 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor0" name="/root/syzkaller-testdir548808556/syzkaller.4AuiK7/152/file0" dev="sda1" ino=16926 res=1 RDX: 0000000000000000 RSI: ffffffff81ed5c9e RDI: ffff88018212ef38 RBP: ffff88018212f0a0 R08: ffff8801d3a68700 R09: ffffed003b5e5b67 R10: ffffed003b5e5b67 R11: ffff8801daf2db3b R12: ffff8801d8c5b000 R13: ffff88018212ef38 R14: 1ffff10030425ddb R15: dffffc0000000000 FS: 00007fea5a996700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000072c000 CR3: 00000001d5eaa000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: locks_remove_file+0x148/0x5c0 fs/locks.c:2607 __fput+0x2f0/0xa70 fs/file_table.c:271 ____fput+0x15/0x20 fs/file_table.c:312 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1ad1/0x26d0 kernel/exit.c:867 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8a8/0x1970 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe 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:00007fea5a995cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 000000000072bfa8 RCX: 0000000000457569 RDX: 00000000004bdd9e RSI: 0000000000000081 RDI: 000000000072bfac RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000072bfac R13: 00007ffd37023acf R14: 00007fea5a9969c0 R15: 0000000000000001 Modules linked in: audit: type=1804 audit(1541617056.004:32): pid=11201 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor0" name="/root/syzkaller-testdir548808556/syzkaller.4AuiK7/152/file0" dev="sda1" ino=16926 res=1 kobject: 'loop5' (00000000390b238d): kobject_uevent_env rds_sendmsg: 28 callbacks suppressed atomic_op 000000009231333e conn xmit_atomic (null) kobject: 'loop5' (00000000390b238d): fill_kobj_path: path = '/devices/virtual/block/loop5' atomic_op 00000000b1718b39 conn xmit_atomic (null) audit: type=1804 audit(1541617056.084:33): pid=11201 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor0" name="/root/syzkaller-testdir548808556/syzkaller.4AuiK7/152/file0" dev="sda1" ino=16926 res=1 ---[ end trace 5f74467bf105e981 ]--- RIP: 0010:__x86_indirect_thunk_rbx+0x10/0x20 arch/x86/lib/retpoline.S:33 kobject: 'loop4' (00000000dc21ab62): kobject_uevent_env Code: 90 0f ae e8 eb f9 48 89 04 24 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 e8 07 00 00 00 f3 90 0f ae e8 eb f9 48 89 1c 24 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 e8 07 00 00 00 f3 kobject: 'loop4' (00000000dc21ab62): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000099f5cc19): kobject_uevent_env RSP: 0018:ffff88018212eeb0 EFLAGS: 00010293 kobject: 'loop3' (0000000099f5cc19): fill_kobj_path: path = '/devices/virtual/block/loop3' RAX: ffff8801d3a68700 RBX: 894cdffffc000000 RCX: ffffffff81ed555d RDX: 0000000000000000 RSI: ffffffff81ed5c9e RDI: ffff88018212ef38 kobject: 'loop5' (00000000390b238d): kobject_uevent_env kobject: 'loop5' (00000000390b238d): fill_kobj_path: path = '/devices/virtual/block/loop5' RBP: ffff88018212f0a0 R08: ffff8801d3a68700 R09: ffffed003b5e5b67 R10: ffffed003b5e5b67 R11: ffff8801daf2db3b R12: ffff8801d8c5b000 kobject: 'loop0' (00000000ff0843d8): kobject_uevent_env kobject: 'loop0' (00000000ff0843d8): fill_kobj_path: path = '/devices/virtual/block/loop0' R13: ffff88018212ef38 R14: 1ffff10030425ddb R15: dffffc0000000000 FS: 00007fea5a996700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 kobject: 'loop4' (00000000dc21ab62): kobject_uevent_env CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop4' (00000000dc21ab62): fill_kobj_path: path = '/devices/virtual/block/loop4' CR2: 0000000000625208 CR3: 00000001c3d82000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop1' (0000000005ba7f7b): kobject_uevent_env DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'loop1' (0000000005ba7f7b): fill_kobj_path: path = '/devices/virtual/block/loop1'