================================================================== BUG: KASAN: slab-use-after-free in lbmIODone+0xed4/0x11f0 fs/jfs/jfs_logmgr.c:2184 Read of size 4 at addr ffff8880286adb08 by task ksoftirqd/0/15 CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.7.0-rc3-syzkaller-00298-g1b8af6552cb7 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 lbmIODone+0xed4/0x11f0 fs/jfs/jfs_logmgr.c:2184 bio_endio+0x596/0x6a0 block/bio.c:1603 req_bio_endio block/blk-mq.c:788 [inline] blk_update_request+0x67b/0x1700 block/blk-mq.c:933 blk_mq_end_request+0x57/0x520 block/blk-mq.c:1056 lo_complete_rq+0x232/0x2f0 drivers/block/loop.c:370 blk_complete_reqs+0xb2/0xf0 block/blk-mq.c:1131 __do_softirq+0x21a/0x8de kernel/softirq.c:553 run_ksoftirqd kernel/softirq.c:921 [inline] run_ksoftirqd+0x31/0x60 kernel/softirq.c:913 smpboot_thread_fn+0x660/0xa10 kernel/smpboot.c:164 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Allocated by task 8127: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:600 [inline] lbmLogInit fs/jfs/jfs_logmgr.c:1822 [inline] lmLogInit+0x3ec/0x1a80 fs/jfs/jfs_logmgr.c:1270 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0x7ea/0x1410 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0x2ea/0x6f0 fs/jfs/jfs_mount.c:257 jfs_fill_super+0x9d2/0xd20 fs/jfs/super.c:565 mount_bdev+0x1f3/0x2e0 fs/super.c:1650 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8c/0x370 fs/super.c:1771 do_new_mount fs/namespace.c:3337 [inline] path_mount+0x1492/0x1ed0 fs/namespace.c:3664 do_mount fs/namespace.c:3677 [inline] __do_sys_mount fs/namespace.c:3886 [inline] __se_sys_mount fs/namespace.c:3863 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:3863 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b Freed by task 5214: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x138/0x190 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:164 [inline] __cache_free mm/slab.c:3370 [inline] __do_kmem_cache_free mm/slab.c:3557 [inline] __kmem_cache_free+0xcc/0x3d0 mm/slab.c:3564 lbmLogShutdown fs/jfs/jfs_logmgr.c:1865 [inline] lmLogShutdown+0x379/0x780 fs/jfs/jfs_logmgr.c:1684 lmLogClose+0x577/0x710 fs/jfs/jfs_logmgr.c:1460 jfs_umount+0x2f0/0x430 fs/jfs/jfs_umount.c:114 jfs_put_super+0x88/0x1d0 fs/jfs/super.c:194 generic_shutdown_super+0x161/0x3d0 fs/super.c:696 kill_block_super+0x3b/0x90 fs/super.c:1667 deactivate_locked_super+0xbc/0x1a0 fs/super.c:484 deactivate_super+0xde/0x100 fs/super.c:517 cleanup_mnt+0x222/0x450 fs/namespace.c:1256 task_work_run+0x14d/0x240 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x217/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296 do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:88 entry_SYSCALL_64_after_hwframe+0x63/0x6b Last potentially related work creation: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 __kasan_record_aux_stack+0x78/0x80 mm/kasan/generic.c:492 __call_rcu_common.constprop.0+0x9a/0x7a0 kernel/rcu/tree.c:2681 shrinker_free+0xfe/0x450 mm/shrinker.c:807 deactivate_locked_super+0x94/0x1a0 fs/super.c:483 deactivate_super+0xde/0x100 fs/super.c:517 cleanup_mnt+0x222/0x450 fs/namespace.c:1256 task_work_run+0x14d/0x240 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x217/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296 do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:88 entry_SYSCALL_64_after_hwframe+0x63/0x6b The buggy address belongs to the object at ffff8880286adb00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 8 bytes inside of freed 192-byte region [ffff8880286adb00, ffff8880286adbc0) The buggy address belongs to the physical page: page:ffffea0000a1ab40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x286ad flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0x10() raw: 00fff00000000800 ffff888013040000 ffffea00009e3f90 ffffea0000863710 raw: 0000000000000000 ffff8880286ad000 0000000100000010 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x342040(__GFP_IO|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 7841, tgid 7840 (syz-executor.0), ts 225978171126, free_ts 225968712457 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d0/0x350 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1544 [inline] get_page_from_freelist+0xa25/0x36d0 mm/page_alloc.c:3312 __alloc_pages+0x22e/0x2420 mm/page_alloc.c:4568 __alloc_pages_node include/linux/gfp.h:238 [inline] kmem_getpages mm/slab.c:1356 [inline] cache_grow_begin+0x99/0x3a0 mm/slab.c:2550 cache_alloc_refill+0x295/0x3b0 mm/slab.c:2923 ____cache_alloc mm/slab.c:2999 [inline] ____cache_alloc mm/slab.c:2982 [inline] __do_cache_alloc mm/slab.c:3185 [inline] slab_alloc_node mm/slab.c:3230 [inline] __kmem_cache_alloc_node+0x37f/0x460 mm/slab.c:3521 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc_node+0x4c/0x90 mm/slab_common.c:1014 kmalloc_array_node include/linux/slab.h:698 [inline] kcalloc_node include/linux/slab.h:703 [inline] memcg_alloc_slab_cgroups+0x10e/0x200 mm/memcontrol.c:2968 memcg_slab_post_alloc_hook+0xa9/0x340 mm/slab.h:532 slab_post_alloc_hook mm/slab.h:771 [inline] slab_alloc_node mm/slab.c:3237 [inline] slab_alloc mm/slab.c:3246 [inline] __kmem_cache_alloc_lru mm/slab.c:3423 [inline] kmem_cache_alloc+0x18d/0x360 mm/slab.c:3432 kmem_cache_zalloc include/linux/slab.h:711 [inline] alloc_buffer_head+0x21/0x140 fs/buffer.c:3018 folio_alloc_buffers+0x2c8/0x7d0 fs/buffer.c:925 create_empty_buffers+0x36/0x480 fs/buffer.c:1650 ntfs_read_block fs/ntfs/aops.c:192 [inline] ntfs_read_folio+0x1d84/0x2430 fs/ntfs/aops.c:430 filemap_read_folio+0xe9/0x2c0 mm/filemap.c:2323 do_read_cache_folio+0x205/0x540 mm/filemap.c:3691 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1137 [inline] free_unref_page_prepare+0x4fa/0xaa0 mm/page_alloc.c:2347 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2487 vfree+0x181/0x7a0 mm/vmalloc.c:2842 kvfree+0x33/0x50 mm/util.c:661 ntfs_free fs/ntfs/malloc.h:74 [inline] load_and_init_upcase fs/ntfs/super.c:1731 [inline] load_system_files fs/ntfs/super.c:1818 [inline] ntfs_fill_super+0x2b0d/0x9100 fs/ntfs/super.c:2900 mount_bdev+0x1f3/0x2e0 fs/super.c:1650 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8c/0x370 fs/super.c:1771 do_new_mount fs/namespace.c:3337 [inline] path_mount+0x1492/0x1ed0 fs/namespace.c:3664 do_mount fs/namespace.c:3677 [inline] __do_sys_mount fs/namespace.c:3886 [inline] __se_sys_mount fs/namespace.c:3863 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:3863 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b Memory state around the buggy address: ffff8880286ada00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880286ada80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8880286adb00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880286adb80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880286adc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================