syz-executor.4 (9976): drop_caches: 2 ============================================ WARNING: possible recursive locking detected 4.14.305-syzkaller #0 Not tainted -------------------------------------------- syz-executor.3/9980 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.3/9980: #0: (&type->s_umount_key#50/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#50/1){+.+.}, 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 #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: 9980 Comm: syz-executor.3 Not tainted 4.14.305-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 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: 0033:0x7f861963562a RSP: 002b:00007f8617ba5f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000061b RCX: 00007f861963562a RDX: 0000000020000600 RSI: 00000000200001c0 RDI: 00007f8617ba5fe0 RBP: 00007f8617ba6020 R08: 00007f8617ba6020 R09: 0000000001a00010 R10: 0000000001a00010 R11: 0000000000000202 R12: 0000000020000600 R13: 00000000200001c0 R14: 00007f8617ba5fe0 R15: 0000000020000140 syz-executor.2 (9974): drop_caches: 2 syz-executor.2 (9974): drop_caches: 2 syz-executor.4 (10014): drop_caches: 2 syz-executor.4 (10014): drop_caches: 2 print_req_error: I/O error, dev loop0, sector 0 print_req_error: I/O error, dev loop3, sector 0 print_req_error: I/O error, dev loop0, sector 0 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. UDF-fs: error (device loop3): udf_process_sequence: Block 100 of volume descriptor sequence is corrupted or we could not read it netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. input: syz1 as /devices/virtual/input/input5 UDF-fs: error (device loop3): udf_read_tagged: tag checksum failed, block 128: 0xf1 != 0x19 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. input: syz1 as /devices/virtual/input/input6 input: syz1 as /devices/virtual/input/input7 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. input: syz1 as /devices/virtual/input/input8 input: syz1 as /devices/virtual/input/input9 UDF-fs: error (device loop3): udf_process_sequence: Block 100 of volume descriptor sequence is corrupted or we could not read it netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. UDF-fs: error (device loop3): udf_read_tagged: tag checksum failed, block 128: 0xf1 != 0x19 input: syz1 as /devices/virtual/input/input10 input: syz1 as /devices/virtual/input/input11 input: syz1 as /devices/virtual/input/input12 UDF-fs: error (device loop2): udf_process_sequence: Block 100 of volume descriptor sequence is corrupted or we could not read it netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. input: syz1 as /devices/virtual/input/input13 UDF-fs: error (device loop2): udf_read_tagged: tag checksum failed, block 128: 0xf1 != 0x19 UDF-fs: error (device loop3): udf_process_sequence: Block 100 of volume descriptor sequence is corrupted or we could not read it input: syz1 as /devices/virtual/input/input14 UDF-fs: error (device loop3): udf_read_tagged: tag checksum failed, block 128: 0xf1 != 0x19 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. input: syz1 as /devices/virtual/input/input15 input: syz1 as /devices/virtual/input/input16 input: syz1 as /devices/virtual/input/input17 input: syz1 as /devices/virtual/input/input18 UDF-fs: error (device loop2): udf_process_sequence: Block 100 of volume descriptor sequence is corrupted or we could not read it netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. input: syz1 as /devices/virtual/input/input19 UDF-fs: error (device loop2): udf_read_tagged: tag checksum failed, block 128: 0xf1 != 0x19 UDF-fs: error (device loop3): udf_process_sequence: Block 100 of volume descriptor sequence is corrupted or we could not read it IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready UDF-fs: error (device loop3): udf_read_tagged: tag checksum failed, block 128: 0xf1 != 0x19 IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready input: syz1 as /devices/virtual/input/input20 UDF-fs: error (device loop2): udf_process_sequence: Block 100 of volume descriptor sequence is corrupted or we could not read it IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready UDF-fs: error (device loop2): udf_read_tagged: tag checksum failed, block 128: 0xf1 != 0x19 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. device team1 entered promiscuous mode Zero length message leads to an empty skb IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready device team1 entered promiscuous mode device team1 entered promiscuous mode IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready