program: r0 = bpf$PROG_LOAD(0x5, &(0x7f0000000440)={0xa, 0x6, &(0x7f0000000000)=ANY=[@ANYBLOB="050005000000000000002000000000008510000002000000850000000500000095000000000000009500a50500000000"], &(0x7f0000000080)='GPL\x00', 0x5, 0xc3, &(0x7f000000cf3d)=""/195, 0x0, 0x0, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x6}, 0x94) syz_mount_image$hfsplus(&(0x7f0000000040), &(0x7f0000000080)='./file1\x00', 0x400, &(0x7f0000000140)=ANY=[], 0x1, 0x694, &(0x7f0000001100)="$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") r1 = creat(&(0x7f0000000000)='./bus\x00', 0x0) io_setup(0x202, &(0x7f0000000200)=0x0) open(&(0x7f0000000100)='./file1\x00', 0x8400, 0x128) io_submit(r2, 0x3b, &(0x7f0000000540)=[&(0x7f00000000c0)={0x25, 0xe7030000, 0x0, 0x1, 0x0, r1, &(0x7f0000000000), 0x70000}]) bpf$BPF_PROG_RAW_TRACEPOINT_LOAD(0x5, &(0x7f0000000600)={0xb, 0x3, &(0x7f0000000000)=ANY=[@ANYBLOB="62524b88df0000d557ea0d292500"/24], &(0x7f0000000480)='GPL\x00'}, 0x80) r3 = syz_open_procfs(0x0, &(0x7f00000001c0)='pagemap\x00') pread64(r3, &(0x7f0000001240)=""/102400, 0x19000, 0x1000000000) r4 = socket$nl_route(0x10, 0x3, 0x0) sendmsg$nl_route_sched(r4, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f00000017c0)=@newtaction={0xe98, 0x30, 0x25, 0x0, 0x0, {}, [{0xe84, 0x1, [@m_pedit={0xe80, 0x1, 0x0, 0x0, {{0xa}, {0xea8, 0x2, 0x0, 0x1, [@TCA_PEDIT_KEYS_EX={0x30, 0x5, 0x0, 0x1, [{0x14, 0x6, 0x0, 0x1, [@TCA_PEDIT_KEY_EX_CMD={0x6}, @TCA_PEDIT_KEY_EX_HTYPE={0x6}]}, {0x14, 0x6, 0x0, 0x1, [@TCA_PEDIT_KEY_EX_CMD={0x6}, @TCA_PEDIT_KEY_EX_HTYPE={0x6}]}, {0x4}]}, @TCA_PEDIT_PARMS_EX={0xe20, 0x4, {{{}, 0x2}, [{}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {0x0, 0x6}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {0x0, 0x4}, {}, {}, {0x0, 0xffffffff, 0x2800}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {0x0, 0x8}, {0x0, 0x0, 0x0, 0xfffffffe}], [{}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {0x5}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {0x5}]}}]}, {0x4}, {0xc}, {0xc}}}]}]}, 0xe98}}, 0x0) dup2(r3, r0) [ 75.028096][ T4666] Bluetooth: hci0: command tx timeout [ 75.075836][ T5317] loop0: detected capacity change from 0 to 1024 [ 75.163498][ T26] audit: type=1800 audit(1761440637.083:2): pid=5317 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.0" name="file1" dev="loop0" ino=20 res=0 errno=0 [ 75.180915][ T5317] [ 75.182010][ T5317] ====================================================== [ 75.185083][ T5317] WARNING: possible circular locking dependency detected [ 75.188072][ T5317] syzkaller #0 Not tainted [ 75.190214][ T5317] ------------------------------------------------------ [ 75.193297][ T5317] syz.0.0/5317 is trying to acquire lock: [ 75.195746][ T5317] ffff888051f90108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1f8/0x1ba0 [ 75.202070][ T5317] [ 75.202070][ T5317] but task is already holding lock: [ 75.205270][ T5317] ffff88803c04a0b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x168/0x290 [ 75.209321][ T5317] [ 75.209321][ T5317] which lock already depends on the new lock. [ 75.209321][ T5317] [ 75.213642][ T5317] [ 75.213642][ T5317] the existing dependency chain (in reverse order) is: [ 75.217498][ T5317] [ 75.217498][ T5317] -> #1 (&tree->tree_lock/1){+.+.}-{4:4}: [ 75.220789][ T5317] lock_acquire+0x120/0x360 [ 75.222765][ T5317] __mutex_lock+0x187/0x1350 [ 75.224808][ T5317] hfsplus_find_init+0x168/0x290 [ 75.226936][ T5317] hfsplus_get_block+0x8dc/0x15d0 [ 75.229311][ T5317] block_read_full_folio+0x29f/0x830 [ 75.231871][ T5317] read_pages+0x35d/0x580 [ 75.234048][ T5317] page_cache_ra_unbounded+0x75e/0x9a0 [ 75.236727][ T5317] filemap_get_pages+0x468/0x1de0 [ 75.239071][ T5317] filemap_read+0x3f6/0x11a0 [ 75.241253][ T5317] __kernel_read+0x4cf/0x960 [ 75.243402][ T5317] integrity_kernel_read+0x89/0xd0 [ 75.245634][ T5317] ima_calc_file_hash+0x85e/0x16f0 [ 75.247917][ T5317] ima_collect_measurement+0x428/0x8f0 [ 75.250486][ T5317] process_measurement+0x1121/0x1a40 [ 75.252732][ T5317] ima_file_check+0xd7/0x120 [ 75.254694][ T5317] security_file_post_open+0xbb/0x290 [ 75.257016][ T5317] path_openat+0x2f26/0x3830 [ 75.259261][ T5317] do_filp_open+0x1fa/0x410 [ 75.261401][ T5317] do_sys_openat2+0x121/0x1c0 [ 75.263629][ T5317] __x64_sys_open+0x11e/0x150 [ 75.265753][ T5317] do_syscall_64+0xfa/0xfa0 [ 75.267900][ T5317] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.270823][ T5317] [ 75.270823][ T5317] -> #0 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}: [ 75.274565][ T5317] validate_chain+0xb9b/0x2140 [ 75.276839][ T5317] __lock_acquire+0xab9/0xd20 [ 75.279048][ T5317] lock_acquire+0x120/0x360 [ 75.281185][ T5317] __mutex_lock+0x187/0x1350 [ 75.283468][ T5317] hfsplus_file_extend+0x1f8/0x1ba0 [ 75.286027][ T5317] hfsplus_bmap_reserve+0x122/0x500 [ 75.288541][ T5317] __hfsplus_ext_write_extent+0x28d/0x5b0 [ 75.291176][ T5317] __hfsplus_ext_cache_extent+0x89/0xe30 [ 75.293797][ T5317] hfsplus_file_extend+0x437/0x1ba0 [ 75.296265][ T5317] hfsplus_get_block+0x40a/0x15d0 [ 75.298809][ T5317] __block_write_begin_int+0x6b5/0x1900 [ 75.301492][ T5317] cont_write_begin+0x789/0xb50 [ 75.303830][ T5317] hfsplus_write_begin+0x66/0xb0 [ 75.306195][ T5317] generic_perform_write+0x2c5/0x900 [ 75.308805][ T5317] generic_file_write_iter+0x117/0x550 [ 75.311526][ T5317] aio_write+0x535/0x7a0 [ 75.313655][ T5317] io_submit_one+0x78b/0x1310 [ 75.315769][ T5317] __se_sys_io_submit+0x185/0x2f0 [ 75.318097][ T5317] do_syscall_64+0xfa/0xfa0 [ 75.320607][ T5317] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.324103][ T5317] [ 75.324103][ T5317] other info that might help us debug this: [ 75.324103][ T5317] [ 75.329814][ T5317] Possible unsafe locking scenario: [ 75.329814][ T5317] [ 75.333845][ T5317] CPU0 CPU1 [ 75.336309][ T5317] ---- ---- [ 75.338900][ T5317] lock(&tree->tree_lock/1); [ 75.341168][ T5317] lock(&HFSPLUS_I(inode)->extents_lock); [ 75.344710][ T5317] lock(&tree->tree_lock/1); [ 75.347947][ T5317] lock(&HFSPLUS_I(inode)->extents_lock); [ 75.350555][ T5317] [ 75.350555][ T5317] *** DEADLOCK *** [ 75.350555][ T5317] [ 75.354017][ T5317] 3 locks held by syz.0.0/5317: [ 75.355974][ T5317] #0: ffff888051f92b78 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: generic_file_write_iter+0xeb/0x550 [ 75.360126][ T5317] #1: ffff888051f92988 (&hip->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1f8/0x1ba0 [ 75.364230][ T5317] #2: ffff88803c04a0b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x168/0x290 [ 75.368468][ T5317] [ 75.368468][ T5317] stack backtrace: [ 75.371058][ T5317] CPU: 0 UID: 0 PID: 5317 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 75.371073][ T5317] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 75.371080][ T5317] Call Trace: [ 75.371088][ T5317] [ 75.371094][ T5317] dump_stack_lvl+0x189/0x250 [ 75.371114][ T5317] ? __pfx_dump_stack_lvl+0x10/0x10 [ 75.371146][ T5317] ? __pfx__printk+0x10/0x10 [ 75.371158][ T5317] ? print_lock_name+0xde/0x100 [ 75.371169][ T5317] print_circular_bug+0x2ee/0x310 [ 75.371186][ T5317] check_noncircular+0x134/0x160 [ 75.371199][ T5317] validate_chain+0xb9b/0x2140 [ 75.371213][ T5317] ? rcu_is_watching+0x15/0xb0 [ 75.371226][ T5317] ? __kasan_check_byte+0x12/0x40 [ 75.371240][ T5317] ? rcu_is_watching+0x15/0xb0 [ 75.371251][ T5317] ? look_up_lock_class+0x74/0x170 [ 75.371267][ T5317] ? register_lock_class+0x51/0x320 [ 75.371277][ T5317] __lock_acquire+0xab9/0xd20 [ 75.371290][ T5317] ? hfsplus_file_extend+0x1f8/0x1ba0 [ 75.371304][ T5317] lock_acquire+0x120/0x360 [ 75.371315][ T5317] ? hfsplus_file_extend+0x1f8/0x1ba0 [ 75.371330][ T5317] __mutex_lock+0x187/0x1350 [ 75.371343][ T5317] ? hfsplus_file_extend+0x1f8/0x1ba0 [ 75.371354][ T5317] ? check_path+0x21/0x40 [ 75.371364][ T5317] ? check_noncircular+0xe0/0x160 [ 75.371377][ T5317] ? hfsplus_file_extend+0x1f8/0x1ba0 [ 75.371387][ T5317] ? lockdep_unlock+0x89/0x120 [ 75.371408][ T5317] ? __pfx___mutex_lock+0x10/0x10 [ 75.371424][ T5317] hfsplus_file_extend+0x1f8/0x1ba0 [ 75.371436][ T5317] ? __lock_acquire+0xab9/0xd20 [ 75.371448][ T5317] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 75.371460][ T5317] ? __pfx___mutex_trylock_common+0x10/0x10 [ 75.371472][ T5317] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.371482][ T5317] ? rcu_is_watching+0x15/0xb0 [ 75.371494][ T5317] ? trace_contention_end+0x39/0x120 [ 75.371506][ T5317] ? __asan_memset+0x22/0x50 [ 75.371516][ T5317] ? hfsplus_brec_find+0x1a9/0x510 [ 75.371527][ T5317] hfsplus_bmap_reserve+0x122/0x500 [ 75.371591][ T5317] __hfsplus_ext_write_extent+0x28d/0x5b0 [ 75.371606][ T5317] __hfsplus_ext_cache_extent+0x89/0xe30 [ 75.371622][ T5317] hfsplus_file_extend+0x437/0x1ba0 [ 75.371638][ T5317] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 75.371653][ T5317] ? clean_bdev_aliases+0x5c9/0x6b0 [ 75.371666][ T5317] ? __pfx_clean_bdev_aliases+0x10/0x10 [ 75.371677][ T5317] hfsplus_get_block+0x40a/0x15d0 [ 75.371691][ T5317] ? __pfx_hfsplus_get_block+0x10/0x10 [ 75.371703][ T5317] ? do_raw_spin_unlock+0x4d/0x240 [ 75.371717][ T5317] ? _raw_spin_unlock+0x28/0x50 [ 75.371729][ T5317] __block_write_begin_int+0x6b5/0x1900 [ 75.371740][ T5317] ? __pfx_workingset_update_node+0x10/0x10 [ 75.371752][ T5317] ? __pfx_hfsplus_get_block+0x10/0x10 [ 75.371764][ T5317] ? __pfx___block_write_begin_int+0x10/0x10 [ 75.371777][ T5317] cont_write_begin+0x789/0xb50 [ 75.371789][ T5317] ? __pfx_cont_write_begin+0x10/0x10 [ 75.371800][ T5317] ? __pfx___might_resched+0x10/0x10 [ 75.371811][ T5317] ? __mark_inode_dirty+0x3d2/0xe10 [ 75.371820][ T5317] ? folio_unlock+0x101/0x160 [ 75.371834][ T5317] hfsplus_write_begin+0x66/0xb0 [ 75.371845][ T5317] ? __pfx_hfsplus_get_block+0x10/0x10 [ 75.371857][ T5317] generic_perform_write+0x2c5/0x900 [ 75.371868][ T5317] ? __pfx_generic_perform_write+0x10/0x10 [ 75.371877][ T5317] ? file_update_time+0x2da/0x490 [ 75.371888][ T5317] ? __generic_file_write_iter+0xf9/0x230 [ 75.371897][ T5317] ? generic_file_write_iter+0x103/0x550 [ 75.371906][ T5317] generic_file_write_iter+0x117/0x550 [ 75.371916][ T5317] ? __pfx_generic_file_write_iter+0x10/0x10 [ 75.371925][ T5317] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 75.371936][ T5317] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 75.371947][ T5317] ? __pfx_aa_file_perm+0x10/0x10 [ 75.371963][ T5317] ? __lock_acquire+0xab9/0xd20 [ 75.371977][ T5317] ? aio_write+0x4c4/0x7a0 [ 75.371989][ T5317] aio_write+0x535/0x7a0 [ 75.372002][ T5317] ? __pfx_aio_write+0x10/0x10 [ 75.372015][ T5317] ? __might_fault+0xb0/0x130 [ 75.372031][ T5317] io_submit_one+0x78b/0x1310 [ 75.372044][ T5317] ? __pfx_io_submit_one+0x10/0x10 [ 75.372053][ T5317] ? __might_fault+0xb0/0x130 [ 75.372067][ T5317] ? __might_fault+0xb0/0x130 [ 75.372079][ T5317] __se_sys_io_submit+0x185/0x2f0 [ 75.372093][ T5317] ? __pfx___se_sys_io_submit+0x10/0x10 [ 75.372109][ T5317] ? do_syscall_64+0xbe/0xfa0 [ 75.372123][ T5317] do_syscall_64+0xfa/0xfa0 [ 75.372135][ T5317] ? lockdep_hardirqs_on+0x9c/0x150 [ 75.372146][ T5317] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.372156][ T5317] ? clear_bhb_loop+0x60/0xb0 [ 75.372166][ T5317] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.372176][ T5317] RIP: 0033:0x7ff64a18efc9 [ 75.372187][ T5317] 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 [ 75.372196][ T5317] RSP: 002b:00007ff64af4b038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 [ 75.372207][ T5317] RAX: ffffffffffffffda RBX: 00007ff64a3e5fa0 RCX: 00007ff64a18efc9 [ 75.372216][ T5317] RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007ff64af22000 [ 75.372223][ T5317] RBP: 00007ff64a211f91 R08: 0000000000000000 R09: 0000000000000000 [ 75.372230][ T5317] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 75.372236][ T5317] R13: 00007ff64a3e6038 R14: 00007ff64a3e5fa0 R15: 00007ffd61ad3cf8 [ 75.372247][ T5317] [ 75.608539][ T5318] netlink: 3696 bytes leftover after parsing attributes in process `syz.0.0'. [ 75.612907][ T5318] netlink: 3696 bytes leftover after parsing attributes in process `syz.0.0'.