============================================ WARNING: possible recursive locking detected 4.14.307-syzkaller #0 Not tainted -------------------------------------------- syz-executor.2/13890 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.2/13890: #0: (&type->s_umount_key#60/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#60/1){+.+.}, 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#2){+.+.}, at: [] hfsplus_find_init+0x1a8/0x220 fs/hfsplus/bfind.c:30 #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: 13890 Comm: syz-executor.2 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 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 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: 0033:0x7fde5f81f62a RSP: 002b:00007fde5dd8ff88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000061b RCX: 00007fde5f81f62a RDX: 0000000020000600 RSI: 00000000200001c0 RDI: 00007fde5dd8ffe0 RBP: 00007fde5dd90020 R08: 00007fde5dd90020 R09: 0000000001a00010 R10: 0000000001a00010 R11: 0000000000000202 R12: 0000000020000600 R13: 00000000200001c0 R14: 00007fde5dd8ffe0 R15: 0000000020000140 F2FS-fs (loop4): invalid crc value F2FS-fs (loop4): Found nat_bits in checkpoint MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: Mounting image 'rom 637cf1fa' through the block layer MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: Mounting image 'rom 637cf1fa' through the block layer F2FS-fs (loop4): Mounted with checkpoint version = 48b305e4 F2FS-fs (loop3): Corrupted extension count (520093732 > 64) F2FS-fs (loop3): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop3): invalid crc value F2FS-fs (loop3): Found nat_bits in checkpoint print_req_error: I/O error, dev loop0, sector 0 buffer_io_error: 22 callbacks suppressed Buffer I/O error on dev loop0, logical block 0, async page read ldm_validate_partition_table(): Disk read failed. Dev loop0: unable to read RDB block 0 loop0: unable to read partition table loop0: partition table beyond EOD, truncated MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: Mounting image 'rom 637cf1fa' through the block layer MTD: Attempt to mount non-MTD device "/dev/loop1" print_req_error: I/O error, dev loop2, sector 0 romfs: Mounting image 'rom 637cf1fa' through the block layer MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: bad initial checksum on dev loop1. bridge0: port 2(bridge_slave_1) entered disabled state bridge0: port 1(bridge_slave_0) entered disabled state MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: bad initial checksum on dev loop1. batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: bad initial checksum on dev loop1. f2fs_msg: 15 callbacks suppressed F2FS-fs (loop3): Corrupted extension count (520093732 > 64) F2FS-fs (loop3): Can't find valid F2FS filesystem in 1th superblock MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: Mounting image 'rom 637cf1fa' through the block layer F2FS-fs (loop3): invalid crc value F2FS-fs (loop3): Found nat_bits in checkpoint overlayfs: unrecognized mount option "metacopy=off" or missing value MTD: Attempt to mount non-MTD device "/dev/loop1" F2FS-fs (loop3): Mounted with checkpoint version = 753bd00b romfs: Mounting image 'rom 637cf1fa' through the block layer MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: Mounting image 'rom 637cf1fa' through the block layer overlayfs: unrecognized mount option "metacopy=off" or missing value overlayfs: unrecognized mount option "metacopy=off" or missing value F2FS-fs (loop4): invalid crc value F2FS-fs (loop4): Found nat_bits in checkpoint F2FS-fs (loop3): Corrupted extension count (520093732 > 64) F2FS-fs (loop3): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop3): invalid crc value MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: Mounting image 'rom 637cf1fa' through the block layer MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: Mounting image 'rom 637cf1fa' through the block layer MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: Mounting image 'rom 637cf1fa' through the block layer MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: Mounting image 'rom 637cf1fa' through the block layer BTRFS: device fsid 24c7a497-3402-47dd-bef8-82358f5f30e0 devid 1 transid 8 /dev/loop5 BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents MTD: Attempt to mount non-MTD device "/dev/loop1" romfs: Mounting image 'rom 637cf1fa' through the block layer audit: type=1326 audit(1677339267.407:23): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=14384 comm="syz-executor.1" exe="/root/syz-executor.1" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f7e3dc380f9 code=0x0 BTRFS info (device loop5): using free space tree audit: type=1326 audit(1677339267.507:24): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=14384 comm="syz-executor.1" exe="/root/syz-executor.1" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f7e3dc380f9 code=0x0 BTRFS info (device loop5): has skinny extents