================================================================== BUG: KASAN: slab-use-after-free in jfs_lazycommit+0x644/0x988 fs/jfs/jfs_txnmgr.c:2730 Read of size 4 at addr ffff0000c6574894 by task jfsCommit/91 CPU: 0 PID: 91 Comm: jfsCommit Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x174/0x514 mm/kasan/report.c:430 kasan_report+0xd4/0x130 mm/kasan/report.c:536 __asan_report_load4_noabort+0x20/0x2c mm/kasan/report_generic.c:380 jfs_lazycommit+0x644/0x988 fs/jfs/jfs_txnmgr.c:2730 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Allocated by task 6461: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:510 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] kmalloc_trace+0x70/0x88 mm/slab_common.c:1066 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] jfs_fill_super+0x108/0x9f0 fs/jfs/super.c:495 mount_bdev+0x26c/0x368 fs/super.c:1380 jfs_do_mount+0x44/0x58 fs/jfs/super.c:670 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe04 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Freed by task 5966: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:521 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0x2a8/0x49c mm/slub.c:3800 kfree+0xb8/0x19c mm/slab_common.c:1019 jfs_put_super+0x144/0x188 fs/jfs/super.c:203 generic_shutdown_super+0x130/0x328 fs/super.c:500 kill_block_super+0x70/0xdc fs/super.c:1407 deactivate_locked_super+0xac/0x124 fs/super.c:331 deactivate_super+0xe0/0x100 fs/super.c:362 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1177 __cleanup_mnt+0x20/0x30 fs/namespace.c:1184 task_work_run+0x230/0x2e0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2180/0x3c90 arch/arm64/kernel/signal.c:1304 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x90/0x15c arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Last potentially related work creation: kasan_save_stack+0x40/0x6c mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:491 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:501 insert_work+0x64/0x384 kernel/workqueue.c:1361 __queue_work+0xd3c/0x1374 kernel/workqueue.c:1524 queue_work_on+0x9c/0x128 kernel/workqueue.c:1552 queue_work include/linux/workqueue.h:504 [inline] call_usermodehelper_exec+0x238/0x48c kernel/umh.c:434 kobject_uevent_env+0x654/0x874 lib/kobject_uevent.c:618 kobject_uevent+0x2c/0x3c lib/kobject_uevent.c:642 driver_register+0x2bc/0x30c drivers/base/driver.c:254 __platform_driver_register+0x74/0x8c drivers/base/platform.c:867 caam_driver_init+0x20/0x2c drivers/crypto/caam/ctrl.c:952 do_one_initcall+0x23c/0x98c init/main.c:1310 do_initcall_level+0x154/0x214 init/main.c:1383 do_initcalls+0x58/0xac init/main.c:1399 do_basic_setup+0x8c/0xa0 init/main.c:1418 kernel_init_freeable+0x360/0x4d8 init/main.c:1638 kernel_init+0x24/0x29c init/main.c:1526 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 The buggy address belongs to the object at ffff0000c6574800 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 148 bytes inside of freed 256-byte region [ffff0000c6574800, ffff0000c6574900) The buggy address belongs to the physical page: page:0000000028453ff0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106574 head:0000000028453ff0 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 ffff0000c0002480 fffffc000306df80 dead000000000006 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000c6574780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000c6574800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000c6574880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000c6574900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000c6574980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================