./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1150613861 <...> [ 50.811321][ T4662] dhcpcd-run-hook (4662) used greatest stack depth: 22320 bytes left forked to background, child pid 4658 [ 54.045078][ T4659] 8021q: adding VLAN 0 to HW filter on device bond0 [ 54.057426][ T4659] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.201' (ECDSA) to the list of known hosts. execve("./syz-executor1150613861", ["./syz-executor1150613861"], 0x7fffcfcee0a0 /* 10 vars */) = 0 brk(NULL) = 0x555556052000 brk(0x555556052c40) = 0x555556052c40 arch_prctl(ARCH_SET_FS, 0x555556052300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1150613861", 4096) = 28 brk(0x555556073c40) = 0x555556073c40 brk(0x555556074000) = 0x555556074000 mprotect(0x7fcffa511000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 mmap(0x20000000, 16506880, PROT_READ|PROT_WRITE|PROT_SEM|PROT_GROWSDOWN, MAP_SHARED|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 process_vm_writev(0, NULL, 0, [{iov_base=NULL, iov_len=0}], 1, 0) = 0 syzkaller login: [ 79.318681][ T5084] [ 79.321058][ T5084] ====================================================== [ 79.328195][ T5084] WARNING: possible circular locking dependency detected [ 79.335299][ T5084] 6.2.0-next-20230301-syzkaller #0 Not tainted [ 79.341459][ T5084] ------------------------------------------------------ [ 79.348480][ T5084] syz-executor115/5084 is trying to acquire lock: [ 79.354894][ T5084] ffff888078307a90 (&vma->vm_lock->lock){++++}-{3:3}, at: collapse_file+0x4fa5/0x5980 [ 79.364535][ T5084] [ 79.364535][ T5084] but task is already holding lock: [ 79.371901][ T5084] ffff88801f93efa8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: collapse_file+0x3da6/0x5980 [ 79.381795][ T5084] [ 79.381795][ T5084] which lock already depends on the new lock. [ 79.381795][ T5084] [ 79.392210][ T5084] [ 79.392210][ T5084] the existing dependency chain (in reverse order) is: [ 79.401228][ T5084] [ 79.401228][ T5084] -> #2 (&mapping->i_mmap_rwsem){++++}-{3:3}: [ 79.409499][ T5084] down_write+0x92/0x200 [ 79.414298][ T5084] dma_resv_lockdep+0x26f/0x5f0 [ 79.419692][ T5084] do_one_initcall+0x141/0x7d0 [ 79.424997][ T5084] kernel_init_freeable+0x5ec/0x900 [ 79.430742][ T5084] kernel_init+0x1e/0x2c0 [ 79.435608][ T5084] ret_from_fork+0x1f/0x30 [ 79.440566][ T5084] [ 79.440566][ T5084] -> #1 (fs_reclaim){+.+.}-{0:0}: [ 79.447809][ T5084] fs_reclaim_acquire+0x11d/0x160 [ 79.453368][ T5084] prepare_alloc_pages+0x159/0x570 [ 79.459011][ T5084] __alloc_pages+0x149/0x5c0 [ 79.464135][ T5084] __folio_alloc+0x16/0x40 [ 79.469088][ T5084] vma_alloc_folio+0x155/0x850 [ 79.474392][ T5084] __handle_mm_fault+0x1857/0x3e70 [ 79.480050][ T5084] handle_mm_fault+0x2c0/0x9c0 [ 79.485540][ T5084] do_user_addr_fault+0x2c1/0x1210 [ 79.491203][ T5084] exc_page_fault+0x98/0x170 [ 79.496337][ T5084] asm_exc_page_fault+0x26/0x30 [ 79.501809][ T5084] [ 79.501809][ T5084] -> #0 (&vma->vm_lock->lock){++++}-{3:3}: [ 79.509813][ T5084] __lock_acquire+0x2ec7/0x5d40 [ 79.515223][ T5084] lock_acquire.part.0+0x11a/0x370 [ 79.520874][ T5084] down_write+0x92/0x200 [ 79.525652][ T5084] collapse_file+0x4fa5/0x5980 [ 79.531053][ T5084] hpage_collapse_scan_file+0xcd3/0x1680 [ 79.537232][ T5084] madvise_collapse+0x53b/0xca0 [ 79.542624][ T5084] madvise_vma_behavior+0x649/0x20e0 [ 79.548451][ T5084] madvise_walk_vmas+0x1c7/0x2b0 [ 79.553961][ T5084] do_madvise.part.0+0x31c/0x470 [ 79.559614][ T5084] __x64_sys_madvise+0x117/0x150 [ 79.565117][ T5084] do_syscall_64+0x39/0xb0 [ 79.570078][ T5084] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 79.576608][ T5084] [ 79.576608][ T5084] other info that might help us debug this: [ 79.576608][ T5084] [ 79.586856][ T5084] Chain exists of: [ 79.586856][ T5084] &vma->vm_lock->lock --> fs_reclaim --> &mapping->i_mmap_rwsem [ 79.586856][ T5084] [ 79.600545][ T5084] Possible unsafe locking scenario: [ 79.600545][ T5084] [ 79.608092][ T5084] CPU0 CPU1 [ 79.613475][ T5084] ---- ---- [ 79.618860][ T5084] lock(&mapping->i_mmap_rwsem); [ 79.623909][ T5084] lock(fs_reclaim); [ 79.630420][ T5084] lock(&mapping->i_mmap_rwsem); [ 79.637974][ T5084] lock(&vma->vm_lock->lock); [ 79.642747][ T5084] [ 79.642747][ T5084] *** DEADLOCK *** [ 79.642747][ T5084] [ 79.650891][ T5084] 2 locks held by syz-executor115/5084: [ 79.656436][ T5084] #0: ffff88801f93efa8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: collapse_file+0x3da6/0x5980 [ 79.667259][ T5084] #1: ffff88807b06f098 (&mm->mmap_lock){++++}-{3:3}, at: collapse_file+0x4667/0x5980 [ 79.676865][ T5084] [ 79.676865][ T5084] stack backtrace: [ 79.682755][ T5084] CPU: 0 PID: 5084 Comm: syz-executor115 Not tainted 6.2.0-next-20230301-syzkaller #0 [ 79.692395][ T5084] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 [ 79.702459][ T5084] Call Trace: [ 79.705743][ T5084] [ 79.708682][ T5084] dump_stack_lvl+0xd9/0x150 [ 79.713302][ T5084] check_noncircular+0x25f/0x2e0 [ 79.718258][ T5084] ? print_circular_bug+0x5c0/0x5c0 [ 79.723477][ T5084] ? xas_store+0x748/0x1c10 [ 79.728000][ T5084] ? collapse_file+0x3cad/0x5980 [ 79.732962][ T5084] ? hpage_collapse_scan_file+0xcd3/0x1680 [ 79.738790][ T5084] ? madvise_collapse+0x53b/0xca0 [ 79.743859][ T5084] __lock_acquire+0x2ec7/0x5d40 [ 79.748736][ T5084] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 79.754755][ T5084] ? put_pages_list+0x540/0x540 [ 79.759620][ T5084] lock_acquire.part.0+0x11a/0x370 [ 79.764749][ T5084] ? collapse_file+0x4fa5/0x5980 [ 79.769738][ T5084] ? lock_release+0x780/0x780 [ 79.774520][ T5084] ? collapse_file+0x4fa5/0x5980 [ 79.779567][ T5084] ? rcu_read_lock_sched_held+0x3e/0x70 [ 79.785131][ T5084] ? trace_lock_acquire+0x1f1/0x2b0 [ 79.790349][ T5084] ? collapse_file+0x4fa5/0x5980 [ 79.795309][ T5084] ? lock_acquire+0x32/0xc0 [ 79.799845][ T5084] ? collapse_file+0x4fa5/0x5980 [ 79.804809][ T5084] down_write+0x92/0x200 [ 79.809074][ T5084] ? collapse_file+0x4fa5/0x5980 [ 79.814040][ T5084] ? down_write_killable_nested+0x250/0x250 [ 79.819980][ T5084] collapse_file+0x4fa5/0x5980 [ 79.824776][ T5084] ? hpage_collapse_scan_pmd+0x4a80/0x4a80 [ 79.830609][ T5084] ? find_held_lock+0x2d/0x110 [ 79.835443][ T5084] ? hpage_collapse_scan_file+0x2b5/0x1680 [ 79.841284][ T5084] ? xas_next_entry+0x26f/0x3c0 [ 79.846248][ T5084] hpage_collapse_scan_file+0xcd3/0x1680 [ 79.851911][ T5084] ? collapse_file+0x5980/0x5980 [ 79.856916][ T5084] madvise_collapse+0x53b/0xca0 [ 79.861798][ T5084] ? current_is_khugepaged+0x30/0x30 [ 79.867114][ T5084] madvise_vma_behavior+0x649/0x20e0 [ 79.872427][ T5084] ? madvise_vma_anon_name+0xf0/0xf0 [ 79.877752][ T5084] ? find_vma_prev+0xe4/0x160 [ 79.882443][ T5084] ? vm_unmapped_area+0x770/0x770 [ 79.887857][ T5084] ? down_write_nested+0x200/0x200 [ 79.892995][ T5084] madvise_walk_vmas+0x1c7/0x2b0 [ 79.897980][ T5084] ? madvise_vma_anon_name+0xf0/0xf0 [ 79.903402][ T5084] ? __remove_memory+0x40/0x40 [ 79.908383][ T5084] ? do_madvise.part.0+0x2e9/0x470 [ 79.913524][ T5084] ? lock_acquire+0x32/0xc0 [ 79.918153][ T5084] ? do_madvise.part.0+0x2e9/0x470 [ 79.923292][ T5084] do_madvise.part.0+0x31c/0x470 [ 79.928274][ T5084] ? madvise_pageout+0x560/0x560 [ 79.933251][ T5084] ? _raw_spin_unlock_irq+0x23/0x50 [ 79.938465][ T5084] ? lockdep_hardirqs_on+0x7d/0x100 [ 79.943688][ T5084] __x64_sys_madvise+0x117/0x150 [ 79.948649][ T5084] ? syscall_trace_enter.constprop.0+0xb0/0x250 [ 79.954937][ T5084] do_syscall_64+0x39/0xb0 [ 79.959398][ T5084] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 79.965310][ T5084] RIP: 0033:0x7fcffa4a4b29 [ 79.969752][ T5084] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 79.989371][ T5084] RSP: 002b:00007ffe20f24e68 EFLAGS: 00000246 ORIG_RAX: 000000000000001c [ 79.997794][ T5084] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcffa4a4b29 [ 80.005773][ T5084] RDX: 0000000000000019 RSI: 0000000000600003 RDI: 0000000020000000 [ 80.013840][ T5084] RBP: 00007fcffa468cd0 R08: 0000000000000000 R09: 0000000000000000 madvise(0x20000000, 6291459, 0x19 /* MADV_??? */) = -1 EINVAL (Invalid argument) exit_group(0) = ? +++ exited with 0 +++ [