loop0: detected capacity change from 0 to 1024 process 'syz.0.0' launched './file1' with NULL argv: empty string added ====================================================== WARNING: possible circular locking dependency detected 6.17.0-rc1-syzkaller-00038-g0cc53520e68b #0 Not tainted ------------------------------------------------------ syz.0.0/5366 is trying to acquire lock: ffff88805b3ac0b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x15a/0x1d0 fs/hfsplus/bfind.c:28 but task is already holding lock: ffff8880532c3048 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_get_block+0x39e/0x1530 fs/hfsplus/extents.c:260 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __mutex_lock_common kernel/locking/mutex.c:598 [inline] __mutex_lock+0x187/0x1360 kernel/locking/mutex.c:760 hfsplus_file_extend+0x1fc/0x1990 fs/hfsplus/extents.c:455 hfsplus_bmap_reserve+0x122/0x500 fs/hfsplus/btree.c:358 __hfsplus_ext_write_extent+0x28d/0x5b0 fs/hfsplus/extents.c:104 __hfsplus_ext_cache_extent+0x89/0xe30 fs/hfsplus/extents.c:186 hfsplus_ext_read_extent fs/hfsplus/extents.c:218 [inline] hfsplus_file_extend+0x444/0x1990 fs/hfsplus/extents.c:459 hfsplus_get_block+0x411/0x1530 fs/hfsplus/extents.c:245 __block_write_begin_int+0x6b2/0x1900 fs/buffer.c:2145 block_write_begin fs/buffer.c:2256 [inline] cont_write_begin+0x789/0xb50 fs/buffer.c:2594 hfsplus_write_begin+0x66/0xb0 fs/hfsplus/inode.c:48 generic_perform_write+0x2c5/0x900 mm/filemap.c:4175 generic_file_write_iter+0x117/0x550 mm/filemap.c:4318 aio_write+0x532/0x7a0 fs/aio.c:1634 __io_submit_one fs/aio.c:-1 [inline] io_submit_one+0x78b/0x1310 fs/aio.c:2053 __do_sys_io_submit fs/aio.c:2112 [inline] __se_sys_io_submit+0x185/0x2f0 fs/aio.c:2082 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&tree->tree_lock/1){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __mutex_lock_common kernel/locking/mutex.c:598 [inline] __mutex_lock+0x187/0x1360 kernel/locking/mutex.c:760 hfsplus_find_init+0x15a/0x1d0 fs/hfsplus/bfind.c:28 hfsplus_ext_read_extent fs/hfsplus/extents.c:216 [inline] hfsplus_get_block+0x8dd/0x1530 fs/hfsplus/extents.c:268 block_read_full_folio+0x29c/0x830 fs/buffer.c:2420 read_pages+0x35a/0x580 mm/readahead.c:170 page_cache_ra_unbounded+0x6b0/0x7b0 mm/readahead.c:297 filemap_get_pages+0x43c/0x1ea0 mm/filemap.c:2603 filemap_read+0x3f6/0x11a0 mm/filemap.c:2712 __kernel_read+0x4cf/0x960 fs/read_write.c:530 prepare_binprm fs/exec.c:1609 [inline] search_binary_handler fs/exec.c:1656 [inline] exec_binprm fs/exec.c:1702 [inline] bprm_execve+0x8ce/0x1450 fs/exec.c:1754 do_execveat_common+0x510/0x6a0 fs/exec.c:1860 do_execveat fs/exec.c:1945 [inline] __do_sys_execveat fs/exec.c:2019 [inline] __se_sys_execveat fs/exec.c:2013 [inline] __x64_sys_execveat+0xc4/0xe0 fs/exec.c:2013 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock/1); lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock/1); *** DEADLOCK *** 3 locks held by syz.0.0/5366: #0: ffff888033ae0548 (&sig->cred_guard_mutex){+.+.}-{4:4}, at: prepare_bprm_creds fs/exec.c:1361 [inline] #0: ffff888033ae0548 (&sig->cred_guard_mutex){+.+.}-{4:4}, at: bprm_execve+0xb9/0x1450 fs/exec.c:1734 #1: ffff8880532c33d8 (mapping.invalidate_lock#3){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #1: ffff8880532c33d8 (mapping.invalidate_lock#3){.+.+}-{4:4}, at: page_cache_ra_unbounded+0x129/0x7b0 mm/readahead.c:228 #2: ffff8880532c3048 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_get_block+0x39e/0x1530 fs/hfsplus/extents.c:260 stack backtrace: CPU: 0 UID: 0 PID: 5366 Comm: syz.0.0 Not tainted 6.17.0-rc1-syzkaller-00038-g0cc53520e68b #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2043 check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __mutex_lock_common kernel/locking/mutex.c:598 [inline] __mutex_lock+0x187/0x1360 kernel/locking/mutex.c:760 hfsplus_find_init+0x15a/0x1d0 fs/hfsplus/bfind.c:28 hfsplus_ext_read_extent fs/hfsplus/extents.c:216 [inline] hfsplus_get_block+0x8dd/0x1530 fs/hfsplus/extents.c:268 block_read_full_folio+0x29c/0x830 fs/buffer.c:2420 read_pages+0x35a/0x580 mm/readahead.c:170 page_cache_ra_unbounded+0x6b0/0x7b0 mm/readahead.c:297 filemap_get_pages+0x43c/0x1ea0 mm/filemap.c:2603 filemap_read+0x3f6/0x11a0 mm/filemap.c:2712 __kernel_read+0x4cf/0x960 fs/read_write.c:530 prepare_binprm fs/exec.c:1609 [inline] search_binary_handler fs/exec.c:1656 [inline] exec_binprm fs/exec.c:1702 [inline] bprm_execve+0x8ce/0x1450 fs/exec.c:1754 do_execveat_common+0x510/0x6a0 fs/exec.c:1860 do_execveat fs/exec.c:1945 [inline] __do_sys_execveat fs/exec.c:2019 [inline] __se_sys_execveat fs/exec.c:2013 [inline] __x64_sys_execveat+0xc4/0xe0 fs/exec.c:2013 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f307d58ebe9 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 RSP: 002b:00007f307e47c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000142 RAX: ffffffffffffffda RBX: 00007f307d7b5fa0 RCX: 00007f307d58ebe9 RDX: 0000000000000000 RSI: 0000200000000280 RDI: ffffffffffffff9c RBP: 00007f307d611e19 R08: 0000000000000000 R09: 0000000000000000 R10: 000020000000b200 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f307d7b6038 R14: 00007f307d7b5fa0 R15: 00007ffd414c5388