Warning: Permanently added '10.128.0.91' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 75.746358][ T8733] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 76.005619][ T8812] [ 76.008116][ T8812] ====================================================== [ 76.015480][ T8812] WARNING: possible circular locking dependency detected [ 76.022835][ T8812] 5.4.0-rc2+ #0 Not tainted [ 76.027312][ T8812] ------------------------------------------------------ [ 76.036876][ T8812] syz-executor870/8812 is trying to acquire lock: [ 76.043459][ T8812] ffff8880a93b7118 (&mm->mmap_sem#2){++++}, at: __might_fault+0xfb/0x1e0 [ 76.051968][ T8812] [ 76.051968][ T8812] but task is already holding lock: [ 76.060150][ T8812] ffff8880a3c16900 (&rp->fetch_lock){+.+.}, at: mon_bin_read+0x60/0x640 [ 76.068482][ T8812] [ 76.068482][ T8812] which lock already depends on the new lock. [ 76.068482][ T8812] [ 76.078871][ T8812] [ 76.078871][ T8812] the existing dependency chain (in reverse order) is: [ 76.088563][ T8812] [ 76.088563][ T8812] -> #1 (&rp->fetch_lock){+.+.}: [ 76.096022][ T8812] __mutex_lock+0x156/0x13c0 [ 76.101141][ T8812] mutex_lock_nested+0x16/0x20 [ 76.107013][ T8812] mon_bin_vma_fault+0x73/0x2d0 [ 76.112487][ T8812] __do_fault+0x111/0x540 [ 76.117334][ T8812] __handle_mm_fault+0x2dd0/0x4040 [ 76.123056][ T8812] handle_mm_fault+0x3b7/0xaa0 [ 76.128328][ T8812] __get_user_pages+0x7d4/0x1b30 [ 76.133774][ T8812] populate_vma_page_range+0x20d/0x2a0 [ 76.139743][ T8812] __mm_populate+0x204/0x380 [ 76.144848][ T8812] vm_mmap_pgoff+0x213/0x230 [ 76.150028][ T8812] ksys_mmap_pgoff+0x4aa/0x630 [ 76.155296][ T8812] __x64_sys_mmap+0xe9/0x1b0 [ 76.160666][ T8812] do_syscall_64+0xfa/0x760 [ 76.165980][ T8812] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.172981][ T8812] [ 76.172981][ T8812] -> #0 (&mm->mmap_sem#2){++++}: [ 76.180163][ T8812] __lock_acquire+0x2596/0x4a00 [ 76.185681][ T8812] lock_acquire+0x190/0x410 [ 76.190866][ T8812] __might_fault+0x15e/0x1e0 [ 76.197303][ T8812] _copy_to_user+0x30/0x160 [ 76.203171][ T8812] mon_bin_read+0x329/0x640 [ 76.208283][ T8812] __vfs_read+0x8a/0x110 [ 76.215985][ T8812] vfs_read+0x1f0/0x440 [ 76.220637][ T8812] ksys_read+0x14f/0x290 [ 76.225374][ T8812] __x64_sys_read+0x73/0xb0 [ 76.230372][ T8812] do_syscall_64+0xfa/0x760 [ 76.235374][ T8812] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.241766][ T8812] [ 76.241766][ T8812] other info that might help us debug this: [ 76.241766][ T8812] [ 76.251966][ T8812] Possible unsafe locking scenario: [ 76.251966][ T8812] [ 76.259391][ T8812] CPU0 CPU1 [ 76.264730][ T8812] ---- ---- [ 76.270121][ T8812] lock(&rp->fetch_lock); [ 76.274509][ T8812] lock(&mm->mmap_sem#2); [ 76.281935][ T8812] lock(&rp->fetch_lock); [ 76.288838][ T8812] lock(&mm->mmap_sem#2); [ 76.293223][ T8812] [ 76.293223][ T8812] *** DEADLOCK *** [ 76.293223][ T8812] [ 76.301341][ T8812] 1 lock held by syz-executor870/8812: [ 76.306764][ T8812] #0: ffff8880a3c16900 (&rp->fetch_lock){+.+.}, at: mon_bin_read+0x60/0x640 [ 76.315502][ T8812] [ 76.315502][ T8812] stack backtrace: [ 76.321371][ T8812] CPU: 1 PID: 8812 Comm: syz-executor870 Not tainted 5.4.0-rc2+ #0 [ 76.329228][ T8812] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.339260][ T8812] Call Trace: [ 76.342647][ T8812] dump_stack+0x172/0x1f0 [ 76.346953][ T8812] print_circular_bug.isra.0.cold+0x163/0x172 [ 76.352991][ T8812] check_noncircular+0x32e/0x3e0 [ 76.357901][ T8812] ? print_circular_bug.isra.0+0x230/0x230 [ 76.363675][ T8812] ? mark_lock+0xc2/0x1220 [ 76.368075][ T8812] ? alloc_list_entry+0xc0/0xc0 [ 76.372900][ T8812] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 76.379114][ T8812] ? find_first_zero_bit+0x9a/0xc0 [ 76.384199][ T8812] __lock_acquire+0x2596/0x4a00 [ 76.389037][ T8812] ? mark_held_locks+0xf0/0xf0 [ 76.393785][ T8812] lock_acquire+0x190/0x410 [ 76.398271][ T8812] ? __might_fault+0xfb/0x1e0 [ 76.402920][ T8812] __might_fault+0x15e/0x1e0 [ 76.407492][ T8812] ? __might_fault+0xfb/0x1e0 [ 76.412141][ T8812] _copy_to_user+0x30/0x160 [ 76.416618][ T8812] mon_bin_read+0x329/0x640 [ 76.421097][ T8812] ? security_file_permission+0x8f/0x380 [ 76.426702][ T8812] __vfs_read+0x8a/0x110 [ 76.430916][ T8812] ? copy_from_buf.isra.0+0x1c0/0x1c0 [ 76.436259][ T8812] vfs_read+0x1f0/0x440 [ 76.440386][ T8812] ksys_read+0x14f/0x290 [ 76.444603][ T8812] ? kernel_write+0x130/0x130 [ 76.449252][ T8812] ? do_syscall_64+0x26/0x760 [ 76.453904][ T8812] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.459942][ T8812] ? do_syscall_64+0x26/0x760 [ 76.464594][ T8812] __x64_sys_read+0x73/0xb0 [ 76.469156][ T8812] do_syscall_64+0xfa/0x760 [ 76.473635][ T8812] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.479499][ T8812] RIP: 0033:0x44a779 [ 76.483368][ T8812] Code: e8 ec b6 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 cc fb ff c3 66 2e 0f 1f 84 00 00 00 00 executing program [ 76.502957][ T8812] RSP: 002b:00007f4e177cece8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 76.511342][ T8812] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 000000000044a779 [ 76.519285][ T8812] RDX: 0000000000000016 RSI: 0000000020000100 RDI: 0000000000000003 [ 76.527239][ T8812] RBP: 00000000006dbc30 R08: 00007f4e177cf700 R09: 0000000000000000 [ 76.535184][ T8812] R10: 00007f4e177cf700 R11: 0000000000000246 R12: 00000000006dbc3c [ 76.543138][ T8812] R13: 00007ffd8d6d206f R14: 00007f4e177cf9c0 R15: 0000000000000001 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program