program: mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='./file1\x00', 0x32) mount$fuse(0x0, 0x0, 0x0, 0x0, &(0x7f0000000400)=ANY=[@ANYBLOB='fd=']) syz_mount_image$hfs(&(0x7f0000000040), &(0x7f00000000c0)='./file0\x00', 0x0, &(0x7f0000000100)=ANY=[@ANYBLOB="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", @ANYRESOCT=0x0, @ANYRESOCT, @ANYRESDEC=0x0, @ANYRES16=0x0, @ANYRES8], 0x1, 0x32a, &(0x7f0000000440)="$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") prlimit64(0x0, 0xe, &(0x7f0000000780)={0x8, 0x20000008b}, 0x0) mprotect(&(0x7f0000ffa000/0x3000)=nil, 0x3000, 0x1000012) sched_setscheduler(0x0, 0x1, &(0x7f00000007c0)=0x7) r0 = openat(0xffffffffffffff9c, &(0x7f0000000800)='./bus\x00', 0x141842, 0x0) r1 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000840)='cpuacct.usage_percpu\x00', 0x275a, 0x0) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000880)='cpuacct.usage_percpu\x00', 0x275a, 0x0) write$binfmt_script(r2, &(0x7f00000008c0), 0xfea7) copy_file_range(r1, 0x0, r0, 0x0, 0xffffffffa003e459, 0x700000000000000) r3 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./file1\x00', 0x42, 0x0) write$FUSE_WRITE(r3, &(0x7f0000000940)={0x18}, 0xfffffdef) mount(0x0, &(0x7f0000000380)='./file1\x00', &(0x7f0000000000)='autofs\x00', 0x0, &(0x7f0000000400)) [ 93.637426][ T4649] Bluetooth: hci0: command tx timeout [ 93.680687][ T1387] cfg80211: failed to load regulatory.db [ 93.811250][ T5322] loop0: detected capacity change from 0 to 64 [ 94.031816][ T5322] syz.0.0: attempt to access beyond end of device [ 94.031816][ T5322] loop0: rw=8390657, sector=163, nr_sectors = 1 limit=64 [ 94.031852][ T5322] Buffer I/O error on dev loop0, logical block 163, lost async page write [ 94.031868][ T5322] syz.0.0: attempt to access beyond end of device [ 94.031868][ T5322] loop0: rw=8390657, sector=167, nr_sectors = 1 limit=64 [ 94.031878][ T5322] Buffer I/O error on dev loop0, logical block 167, lost async page write [ 94.031886][ T5322] syz.0.0: attempt to access beyond end of device [ 94.031886][ T5322] loop0: rw=8390657, sector=169, nr_sectors = 1 limit=64 [ 94.031894][ T5322] Buffer I/O error on dev loop0, logical block 169, lost async page write [ 94.031901][ T5322] syz.0.0: attempt to access beyond end of device [ 94.031901][ T5322] loop0: rw=8390657, sector=171, nr_sectors = 1 limit=64 [ 94.031909][ T5322] Buffer I/O error on dev loop0, logical block 171, lost async page write [ 94.031916][ T5322] syz.0.0: attempt to access beyond end of device [ 94.031916][ T5322] loop0: rw=8390657, sector=172, nr_sectors = 1 limit=64 [ 94.031925][ T5322] Buffer I/O error on dev loop0, logical block 172, lost async page write [ 94.031932][ T5322] syz.0.0: attempt to access beyond end of device [ 94.031932][ T5322] loop0: rw=8390657, sector=173, nr_sectors = 1 limit=64 [ 94.031939][ T5322] Buffer I/O error on dev loop0, logical block 173, lost async page write [ 94.031946][ T5322] syz.0.0: attempt to access beyond end of device [ 94.031946][ T5322] loop0: rw=8390657, sector=174, nr_sectors = 1 limit=64 [ 94.031954][ T5322] Buffer I/O error on dev loop0, logical block 174, lost async page write [ 94.031961][ T5322] syz.0.0: attempt to access beyond end of device [ 94.031961][ T5322] loop0: rw=8390657, sector=175, nr_sectors = 1 limit=64 [ 94.031968][ T5322] Buffer I/O error on dev loop0, logical block 175, lost async page write [ 94.032494][ T5322] syz.0.0: attempt to access beyond end of device [ 94.032494][ T5322] loop0: rw=8390657, sector=176, nr_sectors = 1 limit=64 [ 94.032506][ T5322] Buffer I/O error on dev loop0, logical block 176, lost async page write [ 94.032514][ T5322] syz.0.0: attempt to access beyond end of device [ 94.032514][ T5322] loop0: rw=8390657, sector=177, nr_sectors = 1 limit=64 [ 94.032522][ T5322] Buffer I/O error on dev loop0, logical block 177, lost async page write [ 95.166773][ T5322] autofs: Bad value for 'fd' [ 95.236758][ T37] [ 95.239934][ T37] ============================================ [ 95.242592][ T37] WARNING: possible recursive locking detected [ 95.245292][ T37] syzkaller #0 Not tainted [ 95.247281][ T37] -------------------------------------------- [ 95.250021][ T37] kworker/u4:2/37 is trying to acquire lock: [ 95.252709][ T37] ffff88801365a0a8 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x18d/0x300 [ 95.256903][ T37] [ 95.256903][ T37] but task is already holding lock: [ 95.260110][ T37] ffff88801365a0a8 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x18d/0x300 [ 95.264057][ T37] [ 95.264057][ T37] other info that might help us debug this: [ 95.267265][ T37] Possible unsafe locking scenario: [ 95.267265][ T37] [ 95.270323][ T37] CPU0 [ 95.271764][ T37] ---- [ 95.273174][ T37] lock(&tree->tree_lock/1); [ 95.275170][ T37] lock(&tree->tree_lock/1); [ 95.277172][ T37] [ 95.277172][ T37] *** DEADLOCK *** [ 95.277172][ T37] [ 95.280552][ T37] May be due to missing lock nesting notation [ 95.280552][ T37] [ 95.284080][ T37] locks held by kworker/u4:2/37: 5, last CPU#0: [ 95.286872][ T37] #0: ffff88801d375940 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 [ 95.291773][ T37] #1: ffffc900003f7c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 [ 95.297110][ T37] #2: ffff888041bb80e8 (&type->s_umount_key#53){.+.+}-{4:4}, at: super_trylock_shared+0x23/0xf0 [ 95.301700][ T37] #3: ffff88801365a0a8 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x18d/0x300 [ 95.305933][ T37] #4: ffff888052f180a0 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xf9/0x1680 [ 95.310836][ T37] [ 95.310836][ T37] stack backtrace: [ 95.315181][ T37] CPU: 0 UID: 0 PID: 37 Comm: kworker/u4:2 Not tainted syzkaller #0 PREEMPT(full) [ 95.319036][ T37] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 95.323459][ T37] Workqueue: writeback wb_workfn (flush-7:0) [ 95.326100][ T37] Call Trace: [ 95.327620][ T37] [ 95.328950][ T37] dump_stack_lvl+0xe8/0x150 [ 95.331027][ T37] print_deadlock_bug+0x27a/0x290 [ 95.333282][ T37] __lock_acquire+0x25db/0x2de0 [ 95.335475][ T37] ? _raw_spin_unlock_irqrestore+0x4c/0x80 [ 95.338253][ T37] ? stack_depot_save_flags+0x404/0x7f0 [ 95.340850][ T37] ? kasan_save_track+0x4f/0x80 [ 95.342777][ T37] ? kasan_save_track+0x3e/0x80 [ 95.344699][ T37] ? __kasan_kmalloc+0x93/0xb0 [ 95.346782][ T37] ? __kmalloc_noprof+0x36b/0x720 [ 95.349011][ T37] ? hfs_find_init+0x9d/0x300 [ 95.351103][ T37] ? hfs_extend_file+0x367/0x1680 [ 95.353331][ T37] ? hfs_bmap_reserve+0x108/0x430 [ 95.355587][ T37] ? __hfs_ext_write_extent+0x1fc/0x470 [ 95.358041][ T37] lock_acquire+0x115/0x350 [ 95.360187][ T37] ? hfs_find_init+0x18d/0x300 [ 95.362337][ T37] __mutex_lock+0x19d/0x1550 [ 95.364431][ T37] ? hfs_find_init+0x18d/0x300 [ 95.366549][ T37] ? hfs_find_init+0x18d/0x300 [ 95.368701][ T37] ? __pfx___mutex_lock+0x10/0x10 [ 95.370969][ T37] ? rcu_is_watching+0x16/0xb0 [ 95.373175][ T37] ? trace_kmalloc+0x2a/0xf0 [ 95.375244][ T37] ? __kmalloc_noprof+0x38c/0x720 [ 95.377505][ T37] ? __kmalloc_noprof+0x1ab/0x720 [ 95.379722][ T37] ? hfs_find_init+0x9d/0x300 [ 95.381814][ T37] hfs_find_init+0x18d/0x300 [ 95.383886][ T37] hfs_extend_file+0x367/0x1680 [ 95.386038][ T37] ? __pfx_hfs_extend_file+0x10/0x10 [ 95.388433][ T37] ? _raw_spin_unlock+0x28/0x50 [ 95.390596][ T37] ? hfs_brec_find+0x3db/0x510 [ 95.392766][ T37] hfs_bmap_reserve+0x108/0x430 [ 95.394986][ T37] __hfs_ext_write_extent+0x1fc/0x470 [ 95.397420][ T37] hfs_ext_write_extent+0x17d/0x210 [ 95.399792][ T37] ? __pfx___mpage_writepages+0x10/0x10 [ 95.402331][ T37] ? __pfx_hfs_ext_write_extent+0x10/0x10 [ 95.404833][ T37] hfs_write_inode+0x117/0xa00 [ 95.406733][ T37] ? __pfx_hfs_write_inode+0x10/0x10 [ 95.408956][ T37] ? do_raw_spin_unlock+0x4d/0x200 [ 95.411134][ T37] __writeback_single_inode+0x69d/0x1220 [ 95.413489][ T37] writeback_sb_inodes+0x9de/0x1b00 [ 95.415702][ T37] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 95.418025][ T37] ? irqentry_exit+0x218/0x920 [ 95.420100][ T37] ? __pfx_down_read_trylock+0x10/0x10 [ 95.422517][ T37] ? __pfx___up_read+0x10/0x10 [ 95.424640][ T37] __writeback_inodes_wb+0x114/0x240 [ 95.426992][ T37] wb_writeback+0x42f/0xad0 [ 95.429017][ T37] ? queue_io+0x2b1/0x470 [ 95.430928][ T37] ? __pfx_wb_writeback+0x10/0x10 [ 95.433155][ T37] ? do_raw_spin_lock+0x12b/0x2f0 [ 95.435390][ T37] wb_workfn+0x980/0x10f0 [ 95.437180][ T37] ? update_se+0x90/0x1080 [ 95.439165][ T37] ? __pfx_wb_workfn+0x10/0x10 [ 95.441337][ T37] ? update_protect_slice+0x128/0x210 [ 95.443715][ T37] ? lock_acquire+0x115/0x350 [ 95.445804][ T37] ? rcu_is_watching+0x16/0xb0 [ 95.447998][ T37] ? process_scheduled_works+0x97a/0x1630 [ 95.450269][ T37] process_scheduled_works+0xc3d/0x1630 [ 95.452833][ T37] ? __pfx_process_scheduled_works+0x10/0x10 [ 95.455493][ T37] ? assign_work+0x3cf/0x5d0 [ 95.457552][ T37] worker_thread+0xa47/0xfb0 [ 95.459692][ T37] kthread+0x38b/0x480 [ 95.461574][ T37] ? __pfx_worker_thread+0x10/0x10 [ 95.463908][ T37] ? __pfx_kthread+0x10/0x10 [ 95.465965][ T37] ret_from_fork+0x514/0xb70 [ 95.468064][ T37] ? __pfx_ret_from_fork+0x10/0x10 [ 95.470308][ T37] ? __switch_to+0xc89/0x1420 [ 95.472375][ T37] ? __pfx_kthread+0x10/0x10 [ 95.474123][ T37] ret_from_fork_asm+0x1a/0x30 [ 95.476216][ T37]