program: syz_mount_image$hfsplus(&(0x7f0000000040), &(0x7f0000000080)='./file1\x00', 0x400, &(0x7f0000000140)=ANY=[], 0x1, 0x694, &(0x7f0000001100)="$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") r0 = creat(&(0x7f0000000140)='./file1\x00', 0x0) r1 = socket(0x2, 0x80805, 0x0) r2 = add_key$keyring(&(0x7f0000000000), &(0x7f0000000040)={'syz', 0x3}, 0x0, 0x0, 0xfffffffffffffffb) getsockopt$sock_cred(r1, 0x1, 0x11, &(0x7f0000000000)={0x0, 0x0}, &(0x7f0000000340)=0xc) keyctl$chown(0x4, r2, r3, 0x0) io_setup(0x202, &(0x7f0000000200)=0x0) io_submit(r4, 0x3b, &(0x7f0000000540)=[&(0x7f00000000c0)={0x25, 0xe7030000, 0x0, 0x1, 0x0, r0, &(0x7f0000000000), 0x70000}]) ioctl$PPPIOCATTCHAN(r0, 0x40047438, &(0x7f0000000100)=0x2) [ 85.271775][ T4663] Bluetooth: hci0: command tx timeout [ 85.361512][ T5323] loop0: detected capacity change from 0 to 1024 [ 85.484017][ T5323] [ 85.485151][ T5323] ============================================ [ 85.487690][ T5323] WARNING: possible recursive locking detected [ 85.490771][ T5323] syzkaller #0 Not tainted [ 85.492773][ T5323] -------------------------------------------- [ 85.495536][ T5323] syz.0.0/5323 is trying to acquire lock: [ 85.498459][ T5323] ffff888042f20e88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70 [ 85.504338][ T5323] [ 85.504338][ T5323] but task is already holding lock: [ 85.507712][ T5323] ffff888038d722c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70 [ 85.512855][ T5323] [ 85.512855][ T5323] other info that might help us debug this: [ 85.517658][ T5323] Possible unsafe locking scenario: [ 85.517658][ T5323] [ 85.521825][ T5323] CPU0 [ 85.523328][ T5323] ---- [ 85.524755][ T5323] lock(&HFSPLUS_I(inode)->extents_lock); [ 85.527336][ T5323] lock(&HFSPLUS_I(inode)->extents_lock); [ 85.529856][ T5323] [ 85.529856][ T5323] *** DEADLOCK *** [ 85.529856][ T5323] [ 85.533285][ T5323] May be due to missing lock nesting notation [ 85.533285][ T5323] [ 85.537130][ T5323] 3 locks held by syz.0.0/5323: [ 85.539148][ T5323] #0: ffff888038d724b8 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: generic_file_write_iter+0x11e/0x680 [ 85.544139][ T5323] #1: ffff888038d722c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70 [ 85.549486][ T5323] #2: ffff8880422980b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x168/0x2d0 [ 85.555588][ T5323] [ 85.555588][ T5323] stack backtrace: [ 85.558278][ T5323] CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 85.558300][ T5323] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 85.558330][ T5323] Call Trace: [ 85.558342][ T5323] [ 85.558350][ T5323] dump_stack_lvl+0xe8/0x150 [ 85.558374][ T5323] print_deadlock_bug+0x279/0x290 [ 85.558394][ T5323] __lock_acquire+0x253f/0x2cf0 [ 85.558414][ T5323] ? unwind_next_frame+0xa5/0x23c0 [ 85.558435][ T5323] ? __bfs+0x153/0x290 [ 85.558451][ T5323] ? __pfx_hlock_conflict+0x10/0x10 [ 85.558467][ T5323] lock_acquire+0xf0/0x2e0 [ 85.558476][ T5323] ? hfsplus_file_extend+0x215/0x1d70 [ 85.558488][ T5323] __mutex_lock+0x19f/0x1300 [ 85.558547][ T5323] ? hfsplus_file_extend+0x215/0x1d70 [ 85.558568][ T5323] ? __bfs+0x153/0x290 [ 85.558584][ T5323] ? hfsplus_file_extend+0x215/0x1d70 [ 85.558603][ T5323] ? __pfx___mutex_lock+0x10/0x10 [ 85.558615][ T5323] ? lockdep_unlock+0x5d/0xd0 [ 85.558628][ T5323] ? __lock_acquire+0x146e/0x2cf0 [ 85.558647][ T5323] ? _raw_spin_unlock_irqrestore+0x4c/0x80 [ 85.558664][ T5323] hfsplus_file_extend+0x215/0x1d70 [ 85.558681][ T5323] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 85.558694][ T5323] ? __pfx___mutex_trylock_common+0x10/0x10 [ 85.558710][ T5323] ? rcu_is_watching+0x15/0xb0 [ 85.558730][ T5323] ? trace_contention_end+0x3d/0x150 [ 85.558746][ T5323] ? __asan_memset+0x22/0x50 [ 85.558760][ T5323] ? hfsplus_brec_find+0x19d/0x520 [ 85.558773][ T5323] hfsplus_bmap_reserve+0x125/0x510 [ 85.558788][ T5323] __hfsplus_ext_write_extent+0x28d/0x5b0 [ 85.558805][ T5323] __hfsplus_ext_cache_extent+0x89/0xe30 [ 85.558821][ T5323] hfsplus_file_extend+0x4af/0x1d70 [ 85.558839][ T5323] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 85.558856][ T5323] ? clean_bdev_aliases+0x62e/0x750 [ 85.558868][ T5323] ? __pfx_clean_bdev_aliases+0x10/0x10 [ 85.558882][ T5323] hfsplus_get_block+0x42c/0x1670 [ 85.558900][ T5323] ? __pfx_hfsplus_get_block+0x10/0x10 [ 85.558916][ T5323] ? do_raw_spin_unlock+0x4d/0x210 [ 85.558930][ T5323] ? _raw_spin_unlock+0x28/0x50 [ 85.558946][ T5323] __block_write_begin_int+0x6c6/0x1910 [ 85.558962][ T5323] ? __pfx_hfsplus_get_block+0x10/0x10 [ 85.558977][ T5323] ? __pfx___block_write_begin_int+0x10/0x10 [ 85.558990][ T5323] cont_write_begin+0x737/0xae0 [ 85.559005][ T5323] ? irqentry_exit+0x59e/0x620 [ 85.559023][ T5323] ? __pfx_cont_write_begin+0x10/0x10 [ 85.559036][ T5323] hfsplus_write_begin+0x66/0xb0 [ 85.559054][ T5323] ? __pfx_hfsplus_get_block+0x10/0x10 [ 85.559070][ T5323] generic_perform_write+0x2e2/0x8f0 [ 85.559085][ T5323] ? __pfx_generic_perform_write+0x10/0x10 [ 85.559102][ T5323] ? file_update_time_flags+0x219/0x4a0 [ 85.559118][ T5323] ? __generic_file_write_iter+0xf9/0x230 [ 85.559130][ T5323] ? generic_file_write_iter+0x136/0x680 [ 85.559142][ T5323] generic_file_write_iter+0x14a/0x680 [ 85.559153][ T5323] ? __pfx_generic_file_write_iter+0x10/0x10 [ 85.559162][ T5323] ? do_raw_spin_lock+0x12b/0x2f0 [ 85.559174][ T5323] ? __lock_acquire+0x6b5/0x2cf0 [ 85.559189][ T5323] ? lockdep_hardirqs_on+0x7a/0x110 [ 85.559207][ T5323] ? kasan_save_track+0x4f/0x80 [ 85.559228][ T5323] ? aio_write+0x547/0x870 [ 85.559239][ T5323] aio_write+0x5cd/0x870 [ 85.559249][ T5323] ? __pfx_aio_write+0x10/0x10 [ 85.559264][ T5323] io_submit_one+0x7bb/0x14c0 [ 85.559283][ T5323] ? irqentry_exit+0x59e/0x620 [ 85.559299][ T5323] ? trace_irq_disable+0x3b/0x150 [ 85.559316][ T5323] ? __pfx_io_submit_one+0x10/0x10 [ 85.559336][ T5323] ? __might_fault+0xaf/0x130 [ 85.559353][ T5323] __se_sys_io_submit+0x195/0x340 [ 85.559370][ T5323] ? __pfx___se_sys_io_submit+0x10/0x10 [ 85.559390][ T5323] do_syscall_64+0x14d/0xf80 [ 85.559406][ T5323] ? trace_irq_disable+0x3b/0x150 [ 85.559423][ T5323] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.559436][ T5323] ? clear_bhb_loop+0x40/0x90 [ 85.559449][ T5323] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.559462][ T5323] RIP: 0033:0x7f346c99c799 [ 85.559477][ T5323] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48 [ 85.559488][ T5323] RSP: 002b:00007f346d7b0fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 [ 85.559505][ T5323] RAX: ffffffffffffffda RBX: 00007f346cc15fa0 RCX: 00007f346c99c799 [ 85.559531][ T5323] RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007f346d767000 [ 85.559542][ T5323] RBP: 00007f346ca32bd9 R08: 0000000000000000 R09: 0000000000000000 [ 85.559550][ T5323] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 85.559557][ T5323] R13: 00007f346cc16038 R14: 00007f346cc15fa0 R15: 00007ffc4c0369b8 [ 85.559571][ T5323]