program: r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000580)='memory.events\x00', 0x100002, 0x0) write$cgroup_type(r0, &(0x7f0000000180), 0x9) ioctl$HIDIOCSFLAG(r0, 0x4004480f, &(0x7f0000000000)=0x1) syz_mount_image$hfsplus(&(0x7f0000000040), &(0x7f0000000080)='./file1\x00', 0x400, &(0x7f0000000140)=ANY=[], 0x1, 0x694, &(0x7f0000001100)="$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") r1 = socket$nl_route(0x10, 0x3, 0x0) ioctl$ifreq_SIOCGIFINDEX_vcan(r1, 0x8933, &(0x7f0000000080)={'vxcan1\x00', 0x0}) sendmsg$nl_route(r1, &(0x7f0000000800)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000000c0)=@can_newroute={0x24, 0x18, 0x1, 0x0, 0x0, {0x1d, 0x1, 0x8}, [@CGW_DST_IF={0x8, 0xa, r2}, @CGW_SRC_IF={0x8, 0x9, r2}]}, 0x24}}, 0x0) r3 = creat(&(0x7f0000000100)='./file1\x00', 0x100) io_setup(0x202, &(0x7f0000000200)=0x0) io_submit(r4, 0x3b, &(0x7f0000000540)=[&(0x7f00000000c0)={0x25, 0xe7030000, 0x0, 0x1, 0x0, r3, &(0x7f0000000000), 0x70000}]) [ 103.316581][ T4666] Bluetooth: hci0: command tx timeout [ 103.426029][ T5324] loop0: detected capacity change from 0 to 1024 [ 103.519242][ T5324] [ 103.520429][ T5324] ============================================ [ 103.523251][ T5324] WARNING: possible recursive locking detected [ 103.526054][ T5324] syzkaller #0 Not tainted [ 103.528110][ T5324] -------------------------------------------- [ 103.530939][ T5324] syz.0.0/5324 is trying to acquire lock: [ 103.533464][ T5324] ffff8880423c8e88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70 [ 103.538380][ T5324] [ 103.538380][ T5324] but task is already holding lock: [ 103.541710][ T5324] ffff8880419f62c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70 [ 103.546528][ T5324] [ 103.546528][ T5324] other info that might help us debug this: [ 103.550122][ T5324] Possible unsafe locking scenario: [ 103.550122][ T5324] [ 103.553871][ T5324] CPU0 [ 103.555581][ T5324] ---- [ 103.557036][ T5324] lock(&HFSPLUS_I(inode)->extents_lock); [ 103.559582][ T5324] lock(&HFSPLUS_I(inode)->extents_lock); [ 103.562098][ T5324] [ 103.562098][ T5324] *** DEADLOCK *** [ 103.562098][ T5324] [ 103.566161][ T5324] May be due to missing lock nesting notation [ 103.566161][ T5324] [ 103.570639][ T5324] 3 locks held by syz.0.0/5324: [ 103.572946][ T5324] #0: ffff8880419f64b8 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: generic_file_write_iter+0x11e/0x680 [ 103.577858][ T5324] #1: ffff8880419f62c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70 [ 103.582825][ T5324] #2: ffff8880407c20b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x168/0x2d0 [ 103.587725][ T5324] [ 103.587725][ T5324] stack backtrace: [ 103.590943][ T5324] CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 103.590963][ T5324] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 103.590972][ T5324] Call Trace: [ 103.590980][ T5324] [ 103.590986][ T5324] dump_stack_lvl+0xe8/0x150 [ 103.591015][ T5324] print_deadlock_bug+0x279/0x290 [ 103.591032][ T5324] __lock_acquire+0x253f/0x2cf0 [ 103.591048][ T5324] ? unwind_next_frame+0xa5/0x23c0 [ 103.591064][ T5324] ? __bfs+0x153/0x290 [ 103.591077][ T5324] ? __pfx_hlock_conflict+0x10/0x10 [ 103.591093][ T5324] lock_acquire+0xf0/0x2e0 [ 103.591103][ T5324] ? hfsplus_file_extend+0x215/0x1d70 [ 103.591121][ T5324] __mutex_lock+0x19f/0x1300 [ 103.591198][ T5324] ? hfsplus_file_extend+0x215/0x1d70 [ 103.591220][ T5324] ? __bfs+0x153/0x290 [ 103.591236][ T5324] ? hfsplus_file_extend+0x215/0x1d70 [ 103.591257][ T5324] ? __pfx___mutex_lock+0x10/0x10 [ 103.591270][ T5324] ? lockdep_unlock+0x5d/0xd0 [ 103.591282][ T5324] ? __lock_acquire+0x146e/0x2cf0 [ 103.591295][ T5324] ? _raw_spin_unlock_irqrestore+0x4c/0x80 [ 103.591312][ T5324] hfsplus_file_extend+0x215/0x1d70 [ 103.591331][ T5324] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 103.591347][ T5324] ? __pfx___mutex_trylock_common+0x10/0x10 [ 103.591365][ T5324] ? rcu_is_watching+0x15/0xb0 [ 103.591380][ T5324] ? trace_contention_end+0x3d/0x150 [ 103.591390][ T5324] ? __asan_memset+0x22/0x50 [ 103.591405][ T5324] ? hfsplus_brec_find+0x19d/0x520 [ 103.591419][ T5324] hfsplus_bmap_reserve+0x125/0x510 [ 103.591434][ T5324] __hfsplus_ext_write_extent+0x28d/0x5b0 [ 103.591444][ T5324] __hfsplus_ext_cache_extent+0x89/0xe30 [ 103.591455][ T5324] hfsplus_file_extend+0x4af/0x1d70 [ 103.591473][ T5324] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 103.591490][ T5324] ? clean_bdev_aliases+0x62e/0x750 [ 103.591503][ T5324] ? __pfx_clean_bdev_aliases+0x10/0x10 [ 103.591515][ T5324] hfsplus_get_block+0x42c/0x1670 [ 103.591533][ T5324] ? __pfx_hfsplus_get_block+0x10/0x10 [ 103.591549][ T5324] ? do_raw_spin_unlock+0x4d/0x210 [ 103.591559][ T5324] ? _raw_spin_unlock+0x28/0x50 [ 103.591576][ T5324] __block_write_begin_int+0x6c6/0x1910 [ 103.591618][ T5324] ? __pfx_hfsplus_get_block+0x10/0x10 [ 103.591637][ T5324] ? __pfx___block_write_begin_int+0x10/0x10 [ 103.591651][ T5324] cont_write_begin+0x737/0xae0 [ 103.591663][ T5324] ? irqentry_exit+0x59e/0x620 [ 103.591675][ T5324] ? __pfx_cont_write_begin+0x10/0x10 [ 103.591689][ T5324] hfsplus_write_begin+0x66/0xb0 [ 103.591703][ T5324] ? __pfx_hfsplus_get_block+0x10/0x10 [ 103.591719][ T5324] generic_perform_write+0x2e2/0x8f0 [ 103.591735][ T5324] ? __pfx_generic_perform_write+0x10/0x10 [ 103.591746][ T5324] ? file_update_time_flags+0x219/0x4a0 [ 103.591763][ T5324] ? __generic_file_write_iter+0xf9/0x230 [ 103.591774][ T5324] ? generic_file_write_iter+0x136/0x680 [ 103.591786][ T5324] generic_file_write_iter+0x14a/0x680 [ 103.591798][ T5324] ? __pfx_generic_file_write_iter+0x10/0x10 [ 103.591809][ T5324] ? do_raw_spin_lock+0x12b/0x2f0 [ 103.591820][ T5324] ? __lock_acquire+0x6b5/0x2cf0 [ 103.591834][ T5324] ? lockdep_hardirqs_on+0x7a/0x110 [ 103.591845][ T5324] ? kasan_save_track+0x4f/0x80 [ 103.591856][ T5324] ? aio_write+0x547/0x870 [ 103.591868][ T5324] aio_write+0x5cd/0x870 [ 103.591880][ T5324] ? __pfx_aio_write+0x10/0x10 [ 103.591893][ T5324] io_submit_one+0x7bb/0x14c0 [ 103.591904][ T5324] ? irqentry_exit+0x59e/0x620 [ 103.591915][ T5324] ? trace_irq_disable+0x3b/0x150 [ 103.591933][ T5324] ? __pfx_io_submit_one+0x10/0x10 [ 103.591946][ T5324] ? __might_fault+0xaf/0x130 [ 103.591964][ T5324] __se_sys_io_submit+0x195/0x340 [ 103.591983][ T5324] ? __pfx___se_sys_io_submit+0x10/0x10 [ 103.592003][ T5324] do_syscall_64+0x14d/0xf80 [ 103.592016][ T5324] ? trace_irq_disable+0x3b/0x150 [ 103.592025][ T5324] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 103.592035][ T5324] ? clear_bhb_loop+0x40/0x90 [ 103.592047][ T5324] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 103.592061][ T5324] RIP: 0033:0x7f61ccb9c799 [ 103.592074][ T5324] 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 [ 103.592082][ T5324] RSP: 002b:00007f61cdaa2fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 [ 103.592097][ T5324] RAX: ffffffffffffffda RBX: 00007f61cce15fa0 RCX: 00007f61ccb9c799 [ 103.592106][ T5324] RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007f61cda59000 [ 103.592114][ T5324] RBP: 00007f61ccc32c99 R08: 0000000000000000 R09: 0000000000000000 [ 103.592123][ T5324] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 103.592130][ T5324] R13: 00007f61cce16038 R14: 00007f61cce15fa0 R15: 00007fff0717cdb8 [ 103.592142][ T5324]