Warning: Permanently added '10.128.1.98' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.687212][ T3592] [ 47.689570][ T3592] ============================================ [ 47.695695][ T3592] WARNING: possible recursive locking detected [ 47.701820][ T3592] 5.17.0-rc8-syzkaller-00003-g56e337f2cf13 #0 Not tainted [ 47.708901][ T3592] -------------------------------------------- [ 47.715023][ T3592] syz-executor704/3592 is trying to acquire lock: [ 47.721412][ T3592] ffff888079793468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_write+0x132/0x1c00 [ 47.730193][ T3592] [ 47.730193][ T3592] but task is already holding lock: [ 47.737530][ T3592] ffff888079793068 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_wait_readable+0x39b/0x420 [ 47.746927][ T3592] [ 47.746927][ T3592] other info that might help us debug this: [ 47.754967][ T3592] Possible unsafe locking scenario: [ 47.754967][ T3592] [ 47.762393][ T3592] CPU0 [ 47.765654][ T3592] ---- [ 47.768926][ T3592] lock(&pipe->mutex/1); [ 47.773237][ T3592] lock(&pipe->mutex/1); [ 47.777546][ T3592] [ 47.777546][ T3592] *** DEADLOCK *** [ 47.777546][ T3592] [ 47.785666][ T3592] May be due to missing lock nesting notation [ 47.785666][ T3592] [ 47.793957][ T3592] 1 lock held by syz-executor704/3592: [ 47.799393][ T3592] #0: ffff888079793068 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_wait_readable+0x39b/0x420 [ 47.809207][ T3592] [ 47.809207][ T3592] stack backtrace: [ 47.815069][ T3592] CPU: 0 PID: 3592 Comm: syz-executor704 Not tainted 5.17.0-rc8-syzkaller-00003-g56e337f2cf13 #0 [ 47.825546][ T3592] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.835579][ T3592] Call Trace: [ 47.838836][ T3592] [ 47.841748][ T3592] dump_stack_lvl+0xcd/0x134 [ 47.846344][ T3592] __lock_acquire.cold+0x213/0x3a9 [ 47.851458][ T3592] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 47.857425][ T3592] lock_acquire+0x1ab/0x510 [ 47.861911][ T3592] ? pipe_write+0x132/0x1c00 [ 47.866488][ T3592] ? lock_release+0x720/0x720 [ 47.871170][ T3592] __mutex_lock+0x12f/0x12f0 [ 47.875749][ T3592] ? pipe_write+0x132/0x1c00 [ 47.880329][ T3592] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 47.886313][ T3592] ? pipe_write+0x132/0x1c00 [ 47.890894][ T3592] ? mutex_lock_io_nested+0x1150/0x1150 [ 47.896427][ T3592] ? find_held_lock+0x2d/0x110 [ 47.901175][ T3592] ? aa_file_perm+0x56b/0x1230 [ 47.905926][ T3592] ? lock_downgrade+0x6e0/0x6e0 [ 47.910785][ T3592] pipe_write+0x132/0x1c00 [ 47.915191][ T3592] ? aa_file_perm+0x595/0x1230 [ 47.919941][ T3592] ? generic_pipe_buf_release+0x240/0x240 [ 47.925730][ T3592] ? aa_path_link+0x2f0/0x2f0 [ 47.930387][ T3592] ? mutex_lock_io_nested+0x1150/0x1150 [ 47.935914][ T3592] ? pipe_wait_readable+0x336/0x420 [ 47.941091][ T3592] ? lock_downgrade+0x6e0/0x6e0 [ 47.945924][ T3592] do_iter_readv_writev+0x47a/0x750 [ 47.951104][ T3592] ? new_sync_write+0x660/0x660 [ 47.955940][ T3592] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 47.962163][ T3592] ? security_file_permission+0xab/0xd0 [ 47.967689][ T3592] do_iter_write+0x188/0x710 [ 47.972262][ T3592] vfs_iter_write+0x70/0xa0 [ 47.976744][ T3592] iter_file_splice_write+0x723/0xc70 [ 47.982099][ T3592] ? generic_splice_sendpage+0x140/0x140 [ 47.987733][ T3592] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 47.993957][ T3592] ? security_file_permission+0xab/0xd0 [ 47.999484][ T3592] ? generic_splice_sendpage+0x140/0x140 [ 48.005097][ T3592] do_splice+0xb7e/0x1960 [ 48.009405][ T3592] ? find_held_lock+0x2d/0x110 [ 48.014185][ T3592] ? __fget_files+0x26a/0x470 [ 48.018861][ T3592] ? splice_file_to_pipe+0x120/0x120 [ 48.024135][ T3592] ? find_held_lock+0x2d/0x110 [ 48.028907][ T3592] __do_splice+0x134/0x250 [ 48.033308][ T3592] ? do_splice+0x1960/0x1960 [ 48.037881][ T3592] __x64_sys_splice+0x198/0x250 [ 48.042714][ T3592] do_syscall_64+0x35/0xb0 [ 48.047117][ T3592] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 48.052993][ T3592] RIP: 0033:0x7ff85a54eca9 [ 48.057389][ T3592] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 14 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 48.076979][ T3592] RSP: 002b:00007ff85a501308 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 48.085390][ T3592] RAX: ffffffffffffffd