============================================ WARNING: possible recursive locking detected 4.14.305-syzkaller #0 Not tainted -------------------------------------------- syz-executor.1/9521 is trying to acquire lock: (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: [] hfsplus_get_block+0x1f9/0x820 fs/hfsplus/extents.c:260 but task is already holding lock: (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: [] hfsplus_file_extend+0x188/0xef0 fs/hfsplus/extents.c:452 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 5 locks held by syz-executor.1/9521: #0: (&type->s_umount_key#47/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#47/1){+.+.}, at: [] sget_userns+0x556/0xc10 fs/super.c:516 #1: (&sbi->vh_mutex){+.+.}, at: [] hfsplus_fill_super+0x1314/0x1850 fs/hfsplus/super.c:553 #2: (&tree->tree_lock){+.+.}, at: [] hfsplus_find_init+0x1a8/0x220 fs/hfsplus/bfind.c:30 F2FS-fs (loop2): Mismatch start address, segment0(512) cp_blkaddr(605) #3: (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: [] hfsplus_file_extend+0x188/0xef0 fs/hfsplus/extents.c:452 #4: (&sbi->alloc_mutex){+.+.}, at: [] hfsplus_block_allocate+0xd2/0x910 fs/hfsplus/bitmap.c:35 stack backtrace: CPU: 0 PID: 9521 Comm: syz-executor.1 Not tainted 4.14.305-syzkaller #0 F2FS-fs (loop2): Can't find valid F2FS filesystem in 1th superblock Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_deadlock_bug kernel/locking/lockdep.c:1800 [inline] check_deadlock kernel/locking/lockdep.c:1847 [inline] validate_chain kernel/locking/lockdep.c:2448 [inline] __lock_acquire.cold+0x180/0x97c kernel/locking/lockdep.c:3491 F2FS-fs (loop2): invalid crc value F2FS-fs (loop2): Found nat_bits in checkpoint lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 hfsplus_get_block+0x1f9/0x820 fs/hfsplus/extents.c:260 block_read_full_page+0x25e/0x8d0 fs/buffer.c:2316 do_read_cache_page+0x38e/0xc10 mm/filemap.c:2713 read_mapping_page include/linux/pagemap.h:398 [inline] hfsplus_block_allocate+0x189/0x910 fs/hfsplus/bitmap.c:37 hfsplus_file_extend+0x421/0xef0 fs/hfsplus/extents.c:463 hfsplus_bmap_reserve+0x26e/0x410 fs/hfsplus/btree.c:357 hfsplus_create_cat+0x1af/0x10d0 fs/hfsplus/catalog.c:272 hfsplus_fill_super+0x1386/0x1850 fs/hfsplus/super.c:560 mount_bdev+0x2b3/0x360 fs/super.c:1134 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2572 [inline] do_mount+0xe65/0x2a30 fs/namespace.c:2905 SYSC_mount fs/namespace.c:3121 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3098 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fbc959dc62a RSP: 002b:00007fbc93f4cf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000061b RCX: 00007fbc959dc62a RDX: 0000000020000600 RSI: 00000000200001c0 RDI: 00007fbc93f4cfe0 RBP: 00007fbc93f4d020 R08: 00007fbc93f4d020 R09: 0000000001a00010 R10: 0000000001a00010 R11: 0000000000000202 R12: 0000000020000600 R13: 00000000200001c0 R14: 00007fbc93f4cfe0 R15: 0000000020000140 F2FS-fs (loop2): Mounted with checkpoint version = 753bd00b attempt to access beyond end of device loop2: rw=2049, want=81920, limit=63271 attempt to access beyond end of device loop2: rw=2049, want=81936, limit=63271 F2FS-fs (loop2): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop2): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop2): invalid crc value F2FS-fs (loop2): Found nat_bits in checkpoint F2FS-fs (loop2): Mounted with checkpoint version = 753bd00b attempt to access beyond end of device loop2: rw=2049, want=81920, limit=63271 attempt to access beyond end of device loop2: rw=2049, want=81928, limit=63271 attempt to access beyond end of device loop3: rw=2049, want=81920, limit=63271 attempt to access beyond end of device loop3: rw=2049, want=81936, limit=63271 attempt to access beyond end of device loop2: rw=2049, want=81920, limit=63271 attempt to access beyond end of device loop2: rw=2049, want=81936, limit=63271 overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. attempt to access beyond end of device loop3: rw=2049, want=81920, limit=63271 attempt to access beyond end of device loop3: rw=2049, want=81936, limit=63271 attempt to access beyond end of device loop2: rw=2049, want=81920, limit=63271 attempt to access beyond end of device loop2: rw=2049, want=81936, limit=63271 overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. attempt to access beyond end of device loop3: rw=2049, want=81920, limit=63271 attempt to access beyond end of device loop3: rw=2049, want=81936, limit=63271 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. f2fs_msg: 25 callbacks suppressed F2FS-fs (loop4): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop4): invalid crc value F2FS-fs (loop4): Found nat_bits in checkpoint F2FS-fs (loop4): Mounted with checkpoint version = 753bd00b print_req_error: I/O error, dev loop1, sector 0 F2FS-fs (loop4): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop4): invalid crc value F2FS-fs (loop4): Found nat_bits in checkpoint F2FS-fs (loop4): Mounted with checkpoint version = 753bd00b print_req_error: I/O error, dev loop5, sector 0 print_req_error: I/O error, dev loop1, sector 0 print_req_error: I/O error, dev loop0, sector 0 print_req_error: I/O error, dev loop5, sector 0 XFS (loop2): Superblock has unknown read-only compatible features (0x8) enabled. XFS (loop2): Attempted to mount read-only compatible filesystem read-write. XFS (loop2): Filesystem can only be safely mounted read only. XFS (loop2): SB validate failed with error -22.