blk_update_request: I/O error, dev loop50, sector 8 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 lbmIODone: I/O error in JFS log ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x97/0x5e60 kernel/locking/lockdep.c:4770 Read of size 8 at addr ffff888014cdc968 by task kworker/0:1H/2127 CPU: 0 PID: 2127 Comm: kworker/0:1H Not tainted 5.12.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: kblockd blk_mq_run_work_fn Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x176/0x24e lib/dump_stack.c:120 print_address_description+0x5f/0x3a0 mm/kasan/report.c:232 __kasan_report mm/kasan/report.c:399 [inline] kasan_report+0x15c/0x200 mm/kasan/report.c:416 __lock_acquire+0x97/0x5e60 kernel/locking/lockdep.c:4770 lock_acquire+0x126/0x650 kernel/locking/lockdep.c:5510 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x73/0xa0 kernel/locking/spinlock.c:159 __wake_up_common_lock kernel/sched/wait.c:137 [inline] __wake_up+0xb8/0x140 kernel/sched/wait.c:157 req_bio_endio block/blk-core.c:265 [inline] blk_update_request+0x7f7/0x14f0 block/blk-core.c:1456 blk_mq_end_request block/blk-mq.c:564 [inline] blk_mq_dispatch_rq_list+0xc3c/0x2650 block/blk-mq.c:1388 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:186 [inline] blk_mq_do_dispatch_sched+0x570/0xab0 block/blk-mq-sched.c:199 __blk_mq_sched_dispatch_requests+0x386/0x440 block/blk-mq-sched.c:310 blk_mq_sched_dispatch_requests+0xec/0x160 block/blk-mq-sched.c:341 __blk_mq_run_hw_queue+0xc0/0x120 block/blk-mq.c:1488 process_one_work+0x789/0xfd0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Allocated by task 23818: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:427 [inline] ____kasan_kmalloc+0xc2/0xf0 mm/kasan/common.c:506 kasan_kmalloc include/linux/kasan.h:233 [inline] kmem_cache_alloc_trace+0x21b/0x350 mm/slub.c:2934 kmalloc include/linux/slab.h:554 [inline] lbmLogInit fs/jfs/jfs_logmgr.c:1829 [inline] lmLogInit+0x2d6/0x1dd0 fs/jfs/jfs_logmgr.c:1278 lmLogOpen+0x9c5/0x1190 fs/jfs/jfs_logmgr.c:1124 jfs_mount_rw+0x91/0x5e0 fs/jfs/jfs_mount.c:260 jfs_fill_super+0x5b0/0xb10 fs/jfs/super.c:570 mount_bdev+0x26c/0x3a0 fs/super.c:1367 legacy_get_tree+0xea/0x180 fs/fs_context.c:592 vfs_get_tree+0x86/0x270 fs/super.c:1497 do_new_mount fs/namespace.c:2903 [inline] path_mount+0x188a/0x29a0 fs/namespace.c:3233 do_mount fs/namespace.c:3246 [inline] __do_sys_mount fs/namespace.c:3454 [inline] __se_sys_mount+0x28c/0x320 fs/namespace.c:3431 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 23818: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x3d/0x70 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:357 ____kasan_slab_free+0x100/0x140 mm/kasan/common.c:360 kasan_slab_free include/linux/kasan.h:199 [inline] slab_free_hook mm/slub.c:1562 [inline] slab_free_freelist_hook+0x171/0x270 mm/slub.c:1600 slab_free mm/slub.c:3161 [inline] kfree+0xcf/0x2d0 mm/slub.c:4213 lbmLogShutdown fs/jfs/jfs_logmgr.c:1872 [inline] lmLogInit+0x13a5/0x1dd0 fs/jfs/jfs_logmgr.c:1423 lmLogOpen+0x9c5/0x1190 fs/jfs/jfs_logmgr.c:1124 jfs_mount_rw+0x91/0x5e0 fs/jfs/jfs_mount.c:260 jfs_fill_super+0x5b0/0xb10 fs/jfs/super.c:570 mount_bdev+0x26c/0x3a0 fs/super.c:1367 legacy_get_tree+0xea/0x180 fs/fs_context.c:592 vfs_get_tree+0x86/0x270 fs/super.c:1497 do_new_mount fs/namespace.c:2903 [inline] path_mount+0x188a/0x29a0 fs/namespace.c:3233 do_mount fs/namespace.c:3246 [inline] __do_sys_mount fs/namespace.c:3454 [inline] __se_sys_mount+0x28c/0x320 fs/namespace.c:3431 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Last potentially related work creation: kasan_save_stack+0x27/0x50 mm/kasan/common.c:38 kasan_record_aux_stack+0xee/0x120 mm/kasan/generic.c:345 insert_work+0x54/0x400 kernel/workqueue.c:1331 __queue_work+0x981/0xcc0 kernel/workqueue.c:1497 queue_work_on+0xc0/0x180 kernel/workqueue.c:1524 queue_work include/linux/workqueue.h:507 [inline] call_usermodehelper_exec+0x206/0x3d0 kernel/umh.c:433 kobject_uevent_env+0x1349/0x1730 lib/kobject_uevent.c:617 __loop_clr_fd+0x653/0xa20 drivers/block/loop.c:1248 __blkdev_put+0x519/0x670 fs/block_dev.c:1592 blkdev_put+0x2cd/0x440 fs/block_dev.c:1645 blkdev_close+0x7a/0xa0 fs/block_dev.c:1653 __fput+0x352/0x7b0 fs/file_table.c:280 task_work_run+0x146/0x1c0 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x10b/0x1e0 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x26/0x70 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae Second to last potentially related work creation: kasan_save_stack+0x27/0x50 mm/kasan/common.c:38 kasan_record_aux_stack+0xee/0x120 mm/kasan/generic.c:345 insert_work+0x54/0x400 kernel/workqueue.c:1331 __queue_work+0x981/0xcc0 kernel/workqueue.c:1497 queue_work_on+0xc0/0x180 kernel/workqueue.c:1524 queue_work include/linux/workqueue.h:507 [inline] call_usermodehelper_exec+0x206/0x3d0 kernel/umh.c:433 kobject_uevent_env+0x1349/0x1730 lib/kobject_uevent.c:617 loop_set_size drivers/block/loop.c:255 [inline] loop_configure+0x106c/0x1530 drivers/block/loop.c:1161 lo_ioctl+0x6bf/0x20b0 drivers/block/loop.c:1689 blkdev_ioctl+0x2e1/0x600 block/ioctl.c:583 block_ioctl+0xae/0xf0 fs/block_dev.c:1671 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff888014cdc900 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 104 bytes inside of 192-byte region [ffff888014cdc900, ffff888014cdc9c0) The buggy address belongs to the page: page:ffffea0000533700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14cdc flags: 0xfff00000000200(slab) raw: 00fff00000000200 ffffea00009e3f40 0000000300000003 ffff888010841a00 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888014cdc800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888014cdc880: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888014cdc900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888014cdc980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888014cdca00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================