./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3106292170 <...> Warning: Permanently added '10.128.0.207' (ED25519) to the list of known hosts. execve("./syz-executor3106292170", ["./syz-executor3106292170"], 0x7ffea72d8390 /* 10 vars */) = 0 brk(NULL) = 0x555586d31000 brk(0x555586d31d00) = 0x555586d31d00 arch_prctl(ARCH_SET_FS, 0x555586d31380) = 0 set_tid_address(0x555586d31650) = 5219 set_robust_list(0x555586d31660, 24) = 0 rseq(0x555586d31ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3106292170", 4096) = 28 getrandom("\xba\xd9\x09\x90\x89\x30\xf6\xcf", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555586d31d00 brk(0x555586d52d00) = 0x555586d52d00 brk(0x555586d53000) = 0x555586d53000 mprotect(0x7f4ee9af2000, 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 executing program write(1, "executing program\n", 18) = 18 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f4ee1600000 write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216) = 16777216 munmap(0x7f4ee1600000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file0", 0777) = 0 [ 61.191874][ T5219] loop0: detected capacity change from 0 to 32768 [ 61.269352][ T5219] bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=errors=continue,compression=lz4,str_hash=crc64,erasure_code,no_splitbrain_check,nojournal_transaction_names,reconstruct_alloc [ 61.288779][ T5219] [ 61.291122][ T5219] ============================================ [ 61.297277][ T5219] WARNING: possible recursive locking detected [ 61.303444][ T5219] 6.12.0-rc3-syzkaller-00007-g6485cf5ea253 #0 Not tainted [ 61.310552][ T5219] -------------------------------------------- [ 61.316686][ T5219] syz-executor310/5219 is trying to acquire lock: [ 61.323105][ T5219] ffff888071c00908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_replicas_entry_validate+0x2a/0x80 [ 61.333007][ T5219] [ 61.333007][ T5219] but task is already holding lock: [ 61.340371][ T5219] ffff888071c00908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 61.350128][ T5219] [ 61.350128][ T5219] other info that might help us debug this: [ 61.358171][ T5219] Possible unsafe locking scenario: [ 61.358171][ T5219] [ 61.365629][ T5219] CPU0 [ 61.368901][ T5219] ---- [ 61.372184][ T5219] lock(&c->sb_lock); [ 61.376247][ T5219] lock(&c->sb_lock); [ 61.380332][ T5219] [ 61.380332][ T5219] *** DEADLOCK *** [ 61.380332][ T5219] [ 61.388751][ T5219] May be due to missing lock nesting notation [ 61.388751][ T5219] [ 61.397060][ T5219] 2 locks held by syz-executor310/5219: [ 61.402589][ T5219] #0: ffff888071c00278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_start+0x45/0x5b0 [ 61.411956][ T5219] #1: ffff888071c00908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 61.422131][ T5219] [ 61.422131][ T5219] stack backtrace: [ 61.428018][ T5219] CPU: 1 UID: 0 PID: 5219 Comm: syz-executor310 Not tainted 6.12.0-rc3-syzkaller-00007-g6485cf5ea253 #0 [ 61.439122][ T5219] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 61.449176][ T5219] Call Trace: [ 61.452478][ T5219] [ 61.455405][ T5219] dump_stack_lvl+0x241/0x360 [ 61.460086][ T5219] ? __pfx_dump_stack_lvl+0x10/0x10 [ 61.465279][ T5219] ? __pfx__printk+0x10/0x10 [ 61.469863][ T5219] ? lockdep_unlock+0x16a/0x300 [ 61.474719][ T5219] print_deadlock_bug+0x483/0x620 [ 61.479757][ T5219] validate_chain+0x15e2/0x5920 [ 61.484607][ T5219] ? __pfx___bfs+0x10/0x10 [ 61.489019][ T5219] ? __pfx_validate_chain+0x10/0x10 [ 61.494234][ T5219] ? mark_lock+0x9a/0x360 [ 61.498558][ T5219] ? __lock_acquire+0x1384/0x2050 [ 61.503586][ T5219] ? mark_lock+0x9a/0x360 [ 61.507908][ T5219] __lock_acquire+0x1384/0x2050 [ 61.512763][ T5219] lock_acquire+0x1ed/0x550 [ 61.517285][ T5219] ? bch2_replicas_entry_validate+0x2a/0x80 [ 61.523173][ T5219] ? __pfx_lock_acquire+0x10/0x10 [ 61.528199][ T5219] ? lockdep_hardirqs_on+0x99/0x150 [ 61.533400][ T5219] ? __pfx___might_resched+0x10/0x10 [ 61.538680][ T5219] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 61.544574][ T5219] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 61.550900][ T5219] ? stack_trace_save+0x118/0x1d0 [ 61.555927][ T5219] __mutex_lock+0x136/0xd70 [ 61.560420][ T5219] ? bch2_replicas_entry_validate+0x2a/0x80 [ 61.566309][ T5219] ? kasan_save_track+0x51/0x80 [ 61.571173][ T5219] ? kasan_save_track+0x3f/0x80 [ 61.576026][ T5219] ? __kasan_kmalloc+0x98/0xb0 [ 61.580789][ T5219] ? __kmalloc_node_track_caller_noprof+0x225/0x440 [ 61.587377][ T5219] ? kmemdup_noprof+0x2a/0x60 [ 61.592048][ T5219] ? bch2_read_superblock_clean+0xd6/0x520 [ 61.597846][ T5219] ? bch2_replicas_entry_validate+0x2a/0x80 [ 61.603747][ T5219] ? bch2_fs_start+0x356/0x5b0 [ 61.608508][ T5219] ? __pfx___mutex_lock+0x10/0x10 [ 61.613528][ T5219] ? do_syscall_64+0xf3/0x230 [ 61.618205][ T5219] bch2_replicas_entry_validate+0x2a/0x80 [ 61.623918][ T5219] journal_entry_data_usage_validate+0x2b6/0x690 [ 61.630238][ T5219] ? __pfx_journal_entry_data_usage_validate+0x10/0x10 [ 61.637096][ T5219] ? journal_entry_usage_validate+0xc2/0x360 [ 61.643067][ T5219] ? __pfx_journal_entry_usage_validate+0x10/0x10 [ 61.649472][ T5219] ? rcu_is_watching+0x15/0xb0 [ 61.654233][ T5219] ? trace_kmalloc+0x1f/0xd0 [ 61.658821][ T5219] ? __kmalloc_node_track_caller_noprof+0x242/0x440 [ 61.665420][ T5219] ? kmemdup_noprof+0x45/0x60 [ 61.670122][ T5219] ? bch2_journal_entry_validate+0x6a/0xf0 [ 61.675925][ T5219] bch2_read_superblock_clean+0x207/0x520 [ 61.681644][ T5219] bch2_fs_recovery+0x1f4/0x39c0 [ 61.686585][ T5219] ? mark_lock+0x9a/0x360 [ 61.690910][ T5219] ? __lock_acquire+0x1384/0x2050 [ 61.695939][ T5219] ? __pfx_bch2_fs_recovery+0x10/0x10 [ 61.701321][ T5219] ? __pfx_lock_release+0x10/0x10 [ 61.706351][ T5219] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 61.711991][ T5219] ? __pfx_lock_release+0x10/0x10 [ 61.717044][ T5219] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 61.722680][ T5219] ? bch2_get_next_online_dev+0x4b9/0x4f0 [ 61.728400][ T5219] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 61.734038][ T5219] ? llist_reverse_order+0x72/0x90 [ 61.739146][ T5219] bch2_fs_start+0x356/0x5b0 [ 61.743735][ T5219] bch2_fs_get_tree+0xd68/0x1710 [ 61.748683][ T5219] ? __pfx_bch2_fs_get_tree+0x10/0x10 [ 61.754070][ T5219] ? generic_parse_monolithic+0x387/0x400 [ 61.759798][ T5219] ? cap_capable+0x1b4/0x250 [ 61.764386][ T5219] ? safesetid_security_capable+0xb2/0x1d0 [ 61.770200][ T5219] vfs_get_tree+0x90/0x2b0 [ 61.774615][ T5219] do_new_mount+0x2be/0xb40 [ 61.779146][ T5219] ? __pfx_do_new_mount+0x10/0x10 [ 61.784168][ T5219] __se_sys_mount+0x2d6/0x3c0 [ 61.788847][ T5219] ? __pfx___se_sys_mount+0x10/0x10 [ 61.794076][ T5219] ? do_syscall_64+0x100/0x230 [ 61.798865][ T5219] ? __x64_sys_mount+0x20/0xc0 [ 61.803656][ T5219] do_syscall_64+0xf3/0x230 [ 61.808154][ T5219] ? clear_bhb_loop+0x35/0x90 [ 61.812823][ T5219] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 61.818733][ T5219] RIP: 0033:0x7f4ee9a7a8fa [ 61.823142][ T5219] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 61.842753][ T5219] RSP: 002b:00007ffd21001bd8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 61.851157][ T5219] RAX: ffffffffffffffda RBX: 00007ffd21001bf0 RCX: 00007f4ee9a7a8fa [ 61.859136][ T5219] RDX: 0000000020005d80 RSI: 0000000020005dc0 RDI: 00007ffd21001bf0 [ 61.867112][ T5219] RBP: 0000000000000004 R08: 00007ffd21001c30 R09: 0000000000005d93 [ 61.875089][ T5219] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000 [ 61.883048][ T5219] R13: 00007ffd21001c30 R14: 0000000000000003 R15: 0000000001000000 [ 61.891028][ T5219]