UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) ====================================================== WARNING: possible circular locking dependency detected 4.19.152-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/19325 is trying to acquire lock: 00000000c81d57d0 (&type->s_umount_key#69){++++}, at: __get_super.part.0+0x209/0x2e0 fs/super.c:698 but task is already holding lock: 00000000177bc933 (&bdev->bd_mutex){+.+.}, at: blkdev_reread_part+0x1b/0x40 block/ioctl.c:192 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&bdev->bd_mutex){+.+.}: blkdev_put+0x30/0x520 fs/block_dev.c:1839 release_journal_dev fs/reiserfs/journal.c:2601 [inline] free_journal_ram+0x44b/0x600 fs/reiserfs/journal.c:1904 do_journal_release fs/reiserfs/journal.c:1970 [inline] journal_release+0x225/0x4d0 fs/reiserfs/journal.c:1981 reiserfs_put_super+0xe0/0x5c0 fs/reiserfs/super.c:616 generic_shutdown_super+0x144/0x370 fs/super.c:456 kill_block_super+0x97/0xf0 fs/super.c:1185 deactivate_locked_super+0x94/0x160 fs/super.c:329 deactivate_super+0x174/0x1a0 fs/super.c:360 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&type->s_umount_key#69){++++}: REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 down_read+0x36/0x80 kernel/locking/rwsem.c:24 __get_super.part.0+0x209/0x2e0 fs/super.c:698 __get_super include/linux/spinlock.h:329 [inline] get_super+0x2b/0x50 fs/super.c:727 fsync_bdev+0x14/0xc0 fs/block_dev.c:483 invalidate_partition+0x74/0xb0 block/genhd.c:1580 drop_partitions.isra.0+0x9c/0x190 block/partition-generic.c:454 rescan_partitions+0xab/0x970 block/partition-generic.c:527 __blkdev_reread_part+0x189/0x220 block/ioctl.c:173 blkdev_reread_part+0x23/0x40 block/ioctl.c:193 loop_reread_partitions drivers/block/loop.c:645 [inline] loop_set_status+0x103e/0x1800 drivers/block/loop.c:1330 loop_set_status_old+0x1bb/0x250 drivers/block/loop.c:1440 lo_ioctl+0x3b5/0x20e0 drivers/block/loop.c:1584 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x5cb/0x1a7e block/ioctl.c:601 block_ioctl+0xe9/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&bdev->bd_mutex); lock(&type->s_umount_key#69); lock(&bdev->bd_mutex); lock(&type->s_umount_key#69); *** DEADLOCK *** 1 lock held by syz-executor.3/19325: #0: 00000000177bc933 (&bdev->bd_mutex){+.+.}, at: blkdev_reread_part+0x1b/0x40 block/ioctl.c:192 stack backtrace: CPU: 0 PID: 19325 Comm: syz-executor.3 Not tainted 4.19.152-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2fe lib/dump_stack.c:118 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1221 check_prev_add kernel/locking/lockdep.c:1865 [inline] check_prevs_add kernel/locking/lockdep.c:1978 [inline] validate_chain kernel/locking/lockdep.c:2419 [inline] __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3415 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3907 down_read+0x36/0x80 kernel/locking/rwsem.c:24 __get_super.part.0+0x209/0x2e0 fs/super.c:698 __get_super include/linux/spinlock.h:329 [inline] get_super+0x2b/0x50 fs/super.c:727 fsync_bdev+0x14/0xc0 fs/block_dev.c:483 invalidate_partition+0x74/0xb0 block/genhd.c:1580 drop_partitions.isra.0+0x9c/0x190 block/partition-generic.c:454 rescan_partitions+0xab/0x970 block/partition-generic.c:527 __blkdev_reread_part+0x189/0x220 block/ioctl.c:173 blkdev_reread_part+0x23/0x40 block/ioctl.c:193 loop_reread_partitions drivers/block/loop.c:645 [inline] loop_set_status+0x103e/0x1800 drivers/block/loop.c:1330 loop_set_status_old+0x1bb/0x250 drivers/block/loop.c:1440 lo_ioctl+0x3b5/0x20e0 drivers/block/loop.c:1584 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x5cb/0x1a7e block/ioctl.c:601 block_ioctl+0xe9/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45de59 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f07acc23c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000012ac0 RCX: 000000000045de59 RDX: 0000000020000440 RSI: 0000000000004c02 RDI: 0000000000000003 RBP: 000000000118c008 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfd4 R13: 00007ffcead6f8af R14: 00007f07acc249c0 R15: 000000000118bfd4 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) UDF-fs: warning (device loop1): udf_load_vrs: No anchor found REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: Scanning with blocksize 512 failed UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 netlink: 'syz-executor.3': attribute type 4 has an invalid length. netlink: 'syz-executor.3': attribute type 2 has an invalid length. UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed netlink: 'syz-executor.3': attribute type 4 has an invalid length. UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) netlink: 'syz-executor.3': attribute type 2 has an invalid length. REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 netlink: 'syz-executor.3': attribute type 4 has an invalid length. netlink: 'syz-executor.3': attribute type 2 has an invalid length. netlink: 'syz-executor.3': attribute type 4 has an invalid length. netlink: 'syz-executor.3': attribute type 2 has an invalid length. UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 netlink: 'syz-executor.3': attribute type 4 has an invalid length. netlink: 'syz-executor.3': attribute type 2 has an invalid length. UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 REISERFS warning (device loop3): super-6505 reiserfs_getopt: head of option "barrier" is only correct REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 REISERFS warning (device loop3): super-6505 reiserfs_getopt: head of option "barrier" is only correct UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) UDF-fs: warning (device loop1): udf_load_vrs: No anchor found REISERFS warning (device loop3): super-6505 reiserfs_getopt: head of option "barrier" is only correct UDF-fs: Scanning with blocksize 512 failed REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 REISERFS warning (device loop3): super-6505 reiserfs_getopt: head of option "barrier" is only correct UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 REISERFS warning (device loop3): super-6505 reiserfs_getopt: head of option "barrier" is only correct REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) UDF-fs: Scanning with blocksize 512 failed REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) UDF-fs: Scanning with blocksize 512 failed REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) UDF-fs: warning (device loop1): udf_load_vrs: No anchor found REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: Scanning with blocksize 512 failed UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. UDF-fs: Scanning with blocksize 512 failed UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed REISERFS warning (device loop0): reiserfs_fill_super: Cannot allocate commit workqueue UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) REISERFS warning (device loop0): sh-2011 read_super_block: can't find a reiserfs filesystem on (dev loop0, block 16, size 4096) UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000)