program: r0 = syz_mount_image$hfs(&(0x7f00000001c0), &(0x7f0000000180)='./file1\x00', 0x30000c8, &(0x7f0000000100)=ANY=[], 0x11, 0x2d1, &(0x7f0000000280)="$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") r1 = openat$nullb(0xffffffffffffff9c, &(0x7f0000000000), 0x80000, 0x0) ioctl$IOC_PR_RESERVE(r1, 0x401070c9, 0x0) (async) r2 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x42, 0x0) prlimit64(0x0, 0xe, &(0x7f0000000140)={0x8, 0x8b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000080)=0x7) (async, rerun: 32) open(&(0x7f0000000080)='./bus\x00', 0x14d27e, 0x0) (rerun: 32) open(&(0x7f0000000180)='./bus\x00', 0x14927e, 0x0) (async) pwrite64(r2, &(0x7f0000000140)='2', 0x1, 0x8080c61) (async, rerun: 32) ioctl$FS_IOC_GETFLAGS(r0, 0x80086601, &(0x7f0000000000)) (async, rerun: 32) r3 = open(&(0x7f0000000240)='./file1\x00', 0x145142, 0x0) (async) r4 = syz_usb_connect(0x0, 0x2d, &(0x7f0000000080)=ANY=[@ANYBLOB="120100009ac0b620110f211066865578ac0109029c0001000004000904000001c6cbea00090587033b"], 0x0) (async) r5 = syz_open_dev$char_usb(0xc, 0xb4, 0x0) syz_usb_disconnect(r4) (async, rerun: 32) writev(r5, &(0x7f0000000440)=[{&(0x7f00000000c0)='[', 0x1}], 0x1) (async, rerun: 32) ftruncate(r3, 0x2007ffc) [ 84.998072][ T4703] Bluetooth: hci0: command tx timeout [ 85.062270][ T5362] loop0: detected capacity change from 0 to 64 [ 85.090945][ T5362] ======================================================= [ 85.090945][ T5362] WARNING: The mand mount option has been deprecated and [ 85.090945][ T5362] and is ignored by this kernel. Remove the mand [ 85.090945][ T5362] option from the mount to silence this warning. [ 85.090945][ T5362] ======================================================= [ 85.170694][ T5367] [ 85.171885][ T5367] ============================================ [ 85.174596][ T5367] WARNING: possible recursive locking detected [ 85.177356][ T5367] syzkaller #0 Not tainted [ 85.179341][ T5367] -------------------------------------------- [ 85.182203][ T5367] syz.0.0/5367 is trying to acquire lock: [ 85.184594][ T5367] ffff888033c580f8 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xda/0x1230 [ 85.189119][ T5367] [ 85.189119][ T5367] but task is already holding lock: [ 85.192294][ T5367] ffff888033c58778 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xda/0x1230 [ 85.196946][ T5367] [ 85.196946][ T5367] other info that might help us debug this: [ 85.200329][ T5367] Possible unsafe locking scenario: [ 85.200329][ T5367] [ 85.203648][ T5367] CPU0 [ 85.205067][ T5367] ---- [ 85.206509][ T5367] lock(&HFS_I(tree->inode)->extents_lock); [ 85.209017][ T5367] lock(&HFS_I(tree->inode)->extents_lock); [ 85.211665][ T5367] [ 85.211665][ T5367] *** DEADLOCK *** [ 85.211665][ T5367] [ 85.215253][ T5367] May be due to missing lock nesting notation [ 85.215253][ T5367] [ 85.218841][ T5367] 5 locks held by syz.0.0/5367: [ 85.220902][ T5367] #0: ffff88801214e428 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 85.224832][ T5367] #1: ffff888033c58fa0 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: path_openat+0x8da/0x3830 [ 85.229026][ T5367] #2: ffff88801f1720b0 (&tree->tree_lock){+.+.}-{4:4}, at: hfs_find_init+0x184/0x200 [ 85.232829][ T5367] #3: ffff888033c58778 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xda/0x1230 [ 85.237265][ T5367] #4: ffff8880116b00b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x184/0x200 [ 85.241346][ T5367] [ 85.241346][ T5367] stack backtrace: [ 85.243727][ T5367] CPU: 0 UID: 0 PID: 5367 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 85.243742][ T5367] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 85.243750][ T5367] Call Trace: [ 85.243757][ T5367] [ 85.243763][ T5367] dump_stack_lvl+0x189/0x250 [ 85.243781][ T5367] ? __pfx_dump_stack_lvl+0x10/0x10 [ 85.243794][ T5367] ? __pfx__printk+0x10/0x10 [ 85.243809][ T5367] ? print_lock_name+0xde/0x100 [ 85.243823][ T5367] print_deadlock_bug+0x28b/0x2a0 [ 85.243836][ T5367] validate_chain+0x1a3f/0x2140 [ 85.243847][ T5367] ? rcu_is_watching+0x15/0xb0 [ 85.243858][ T5367] ? rcu_is_watching+0x15/0xb0 [ 85.243867][ T5367] ? lock_release+0x4b/0x3e0 [ 85.243881][ T5367] ? lock_release+0x4b/0x3e0 [ 85.243895][ T5367] ? look_up_lock_class+0x74/0x170 [ 85.243947][ T5367] ? register_lock_class+0x51/0x320 [ 85.243962][ T5367] __lock_acquire+0xab9/0xd20 [ 85.243974][ T5367] ? hfs_extend_file+0xda/0x1230 [ 85.243983][ T5367] lock_acquire+0x120/0x360 [ 85.243995][ T5367] ? hfs_extend_file+0xda/0x1230 [ 85.244010][ T5367] __mutex_lock+0x187/0x1350 [ 85.244020][ T5367] ? hfs_extend_file+0xda/0x1230 [ 85.244035][ T5367] ? lockdep_unlock+0x89/0x120 [ 85.244049][ T5367] ? hfs_extend_file+0xda/0x1230 [ 85.244062][ T5367] ? __pfx___mutex_lock+0x10/0x10 [ 85.244077][ T5367] hfs_extend_file+0xda/0x1230 [ 85.244088][ T5367] ? __pfx_hfs_extend_file+0x10/0x10 [ 85.244097][ T5367] ? __pfx___mutex_trylock_common+0x10/0x10 [ 85.244104][ T5367] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.244111][ T5367] ? rcu_is_watching+0x15/0xb0 [ 85.244117][ T5367] ? trace_contention_end+0x39/0x120 [ 85.244124][ T5367] ? __mutex_lock+0x335/0x1350 [ 85.244131][ T5367] ? hfs_brec_find+0x18e/0x500 [ 85.244138][ T5367] hfs_bmap_reserve+0x107/0x430 [ 85.244148][ T5367] __hfs_ext_write_extent+0x1fa/0x470 [ 85.244157][ T5367] __hfs_ext_cache_extent+0x6b/0x9b0 [ 85.244166][ T5367] ? hfs_find_init+0x184/0x200 [ 85.244173][ T5367] hfs_extend_file+0x316/0x1230 [ 85.244185][ T5367] ? __pfx_hfs_extend_file+0x10/0x10 [ 85.244197][ T5367] ? __mutex_lock+0x335/0x1350 [ 85.244211][ T5367] ? __pfx___mutex_lock+0x10/0x10 [ 85.244223][ T5367] hfs_bmap_reserve+0x107/0x430 [ 85.244238][ T5367] hfs_cat_create+0x1b3/0x640 [ 85.244251][ T5367] ? do_raw_spin_lock+0x121/0x290 [ 85.244262][ T5367] ? __pfx_hfs_cat_create+0x10/0x10 [ 85.244272][ T5367] ? _raw_spin_unlock+0x28/0x50 [ 85.244282][ T5367] ? hfs_new_inode+0x7c9/0xba0 [ 85.244296][ T5367] hfs_create+0x66/0xe0 [ 85.244309][ T5367] ? __pfx_hfs_create+0x10/0x10 [ 85.244321][ T5367] path_openat+0x14f4/0x3830 [ 85.244331][ T5367] ? arch_stack_walk+0xfc/0x150 [ 85.244351][ T5367] ? __pfx_path_openat+0x10/0x10 [ 85.244360][ T5367] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.244375][ T5367] do_filp_open+0x1fa/0x410 [ 85.244385][ T5367] ? __lock_acquire+0xab9/0xd20 [ 85.244398][ T5367] ? __pfx_do_filp_open+0x10/0x10 [ 85.244407][ T5367] ? _raw_spin_unlock+0x28/0x50 [ 85.244416][ T5367] ? alloc_fd+0x64c/0x6c0 [ 85.244426][ T5367] do_sys_openat2+0x121/0x1c0 [ 85.244437][ T5367] ? __pfx_do_sys_openat2+0x10/0x10 [ 85.244448][ T5367] ? rcu_is_watching+0x15/0xb0 [ 85.244454][ T5367] __x64_sys_open+0x11e/0x150 [ 85.244468][ T5367] do_syscall_64+0xfa/0x3b0 [ 85.244478][ T5367] ? lockdep_hardirqs_on+0x9c/0x150 [ 85.244487][ T5367] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.244497][ T5367] ? clear_bhb_loop+0x60/0xb0 [ 85.244509][ T5367] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.244526][ T5367] RIP: 0033:0x7f593f78eba9 [ 85.244537][ T5367] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 [ 85.244546][ T5367] RSP: 002b:00007f593bbd4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 85.244555][ T5367] RAX: ffffffffffffffda RBX: 00007f593f9d6180 RCX: 00007f593f78eba9 [ 85.244560][ T5367] RDX: 0000000000000000 RSI: 000000000014d27e RDI: 0000200000000080 [ 85.244564][ T5367] RBP: 00007f593f811e19 R08: 0000000000000000 R09: 0000000000000000 [ 85.244568][ T5367] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 85.244572][ T5367] R13: 00007f593f9d6218 R14: 00007f593f9d6180 R15: 00007ffeb913a528 [ 85.244579][ T5367]