Hello, syzbot found the following issue on: HEAD commit: ff7afaeca1a1 Merge tag 'nfs-for-6.12-3' of git://git.linux.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13d43f40580000 kernel config: https://syzkaller.appspot.com/x/.config?x=11254d3590b16717 dashboard link: https://syzkaller.appspot.com/bug?extid=4cba2fd444e9a16ae758 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=135dae30580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15142d87980000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-ff7afaec.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d8c6d968e5c0/vmlinux-ff7afaec.xz kernel image: https://storage.googleapis.com/syzbot-assets/dcee7f1927a8/bzImage-ff7afaec.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/55a0799266ca/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4cba2fd444e9a16ae758@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 0 to 1024 hfsplus: inconsistency in B*Tree (128,1,255,1,0) ============================================ WARNING: possible recursive locking detected 6.12.0-rc6-syzkaller-00110-gff7afaeca1a1 #0 Not tainted -------------------------------------------- syz-executor395/5309 is trying to acquire lock: ffff8880422d0108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x21b/0x1b70 fs/hfsplus/extents.c:458 but task is already holding lock: ffff8880422d0e88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x21b/0x1b70 fs/hfsplus/extents.c:458 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&HFSPLUS_I(inode)->extents_lock); *** DEADLOCK *** May be due to missing lock nesting notation 6 locks held by syz-executor395/5309: #0: ffff88804026a420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515 #1: ffff8880422d24b8 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] #1: ffff8880422d24b8 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: vfs_setxattr+0x1e1/0x430 fs/xattr.c:320 #2: ffff8880118740b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x14a/0x1c0 fs/hfsplus/bfind.c:28 #3: ffff88801ebc80b0 (&tree->tree_lock/2){+.+.}-{3:3}, at: hfsplus_find_init+0x14a/0x1c0 fs/hfsplus/bfind.c:28 #4: ffff8880422d0e88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x21b/0x1b70 fs/hfsplus/extents.c:458 #5: ffff8880118720b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x14a/0x1c0 fs/hfsplus/bfind.c:28 stack backtrace: CPU: 0 UID: 0 PID: 5309 Comm: syz-executor395 Not tainted 6.12.0-rc6-syzkaller-00110-gff7afaeca1a1 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3037 check_deadlock kernel/locking/lockdep.c:3089 [inline] validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3891 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 hfsplus_file_extend+0x21b/0x1b70 fs/hfsplus/extents.c:458 hfsplus_bmap_reserve+0x105/0x4e0 fs/hfsplus/btree.c:358 __hfsplus_ext_write_extent+0x2a4/0x5c0 fs/hfsplus/extents.c:104 __hfsplus_ext_cache_extent+0x84/0xe10 fs/hfsplus/extents.c:186 hfsplus_ext_read_extent fs/hfsplus/extents.c:218 [inline] hfsplus_file_extend+0x48c/0x1b70 fs/hfsplus/extents.c:462 hfsplus_bmap_reserve+0x105/0x4e0 fs/hfsplus/btree.c:358 hfsplus_create_attr+0x1c8/0x640 fs/hfsplus/attributes.c:221 __hfsplus_setxattr+0x6fe/0x22d0 fs/hfsplus/xattr.c:354 hfsplus_setxattr+0xb0/0xe0 fs/hfsplus/xattr.c:432 hfsplus_trusted_setxattr+0x40/0x60 fs/hfsplus/xattr_trusted.c:30 __vfs_setxattr+0x468/0x4a0 fs/xattr.c:200 __vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234 vfs_setxattr+0x221/0x430 fs/xattr.c:321 do_setxattr fs/xattr.c:629 [inline] path_setxattr+0x37e/0x4d0 fs/xattr.c:658 __do_sys_lsetxattr fs/xattr.c:683 [inline] __se_sys_lsetxattr fs/xattr.c:679 [inline] __x64_sys_lsetxattr+0xb8/0xd0 fs/xattr.c:679 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f704e2aca99 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd231fbc58 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f704e2aca99 RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000020000040 RBP: 00007f704e3205f0 R08: 0000000000000000 R09: 00005555908174c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd231fbc80 R13: 00007ffd231fbea8 R14: 431bde82d7b634db R15: 00007f704e2f503b </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
