================================================================== BUG: KASAN: slab-use-after-free in lbmIODone+0x135f/0x1750 fs/jfs/jfs_logmgr.c:2179 Read of size 4 at addr ffff888079627608 by task ksoftirqd/1/21 CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted 6.2.0-syzkaller-13163-g04a357b1f6f0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x163/0x540 mm/kasan/report.c:430 kasan_report+0x143/0x170 mm/kasan/report.c:536 lbmIODone+0x135f/0x1750 fs/jfs/jfs_logmgr.c:2179 req_bio_endio block/blk-mq.c:795 [inline] blk_update_request+0x4d7/0xfe0 block/blk-mq.c:927 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1054 blk_complete_reqs block/blk-mq.c:1132 [inline] blk_done_softirq+0xfc/0x150 block/blk-mq.c:1137 __do_softirq+0x311/0xb1a kernel/softirq.c:571 run_ksoftirqd+0xc5/0x120 kernel/softirq.c:934 smpboot_thread_fn+0x533/0xa30 kernel/smpboot.c:164 kthread+0x270/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 10054: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:580 [inline] lbmLogInit fs/jfs/jfs_logmgr.c:1822 [inline] lmLogInit+0x3b4/0x1c90 fs/jfs/jfs_logmgr.c:1270 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0x556/0x1030 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0xf1/0x6a0 fs/jfs/jfs_mount.c:257 jfs_fill_super+0x681/0xc50 fs/jfs/super.c:565 mount_bdev+0x271/0x3a0 fs/super.c:1371 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1501 do_new_mount+0x28f/0xae0 fs/namespace.c:3042 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3571 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5102: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 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+0x264/0x3c0 mm/slub.c:3800 lbmLogShutdown fs/jfs/jfs_logmgr.c:1865 [inline] lmLogShutdown+0x504/0x970 fs/jfs/jfs_logmgr.c:1684 lmLogClose+0x297/0x530 fs/jfs/jfs_logmgr.c:1460 jfs_umount+0x2ce/0x3a0 fs/jfs/jfs_umount.c:114 jfs_put_super+0x8a/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x134/0x340 fs/super.c:491 kill_block_super+0x7e/0xe0 fs/super.c:1398 deactivate_locked_super+0xa4/0x110 fs/super.c:331 cleanup_mnt+0x490/0x520 fs/namespace.c:1177 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x2e0 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888079627600 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 8 bytes inside of freed 192-byte region [ffff888079627600, ffff8880796276c0) The buggy address belongs to the physical page: page:ffffea0001e589c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x79627 ksm flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff888012441a00 ffffea0000a89cc0 dead000000000003 raw: 0000000000000000 0000000000100010 00000001ffffffff 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 0x112c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 8526, tgid 8525 (syz-executor.2), ts 349344679832, free_ts 348824986911 prep_new_page mm/page_alloc.c:2552 [inline] get_page_from_freelist+0x37e0/0x3970 mm/page_alloc.c:4325 __alloc_pages+0x291/0x7f0 mm/page_alloc.c:5591 __alloc_pages_node include/linux/gfp.h:237 [inline] alloc_slab_page+0x59/0x160 mm/slub.c:1853 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x1b8/0x2a0 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc_node+0xa2/0x190 mm/slab_common.c:974 kmalloc_array_node include/linux/slab.h:697 [inline] kcalloc_node include/linux/slab.h:702 [inline] memcg_alloc_slab_cgroups+0x81/0x120 mm/memcontrol.c:2899 memcg_slab_post_alloc_hook mm/slab.h:546 [inline] slab_post_alloc_hook+0xe3/0x3a0 mm/slab.h:777 slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x12c/0x280 mm/slub.c:3476 kmem_cache_zalloc include/linux/slab.h:710 [inline] alloc_buffer_head+0x24/0x100 fs/buffer.c:2947 alloc_page_buffers+0x32d/0x950 fs/buffer.c:872 create_empty_buffers+0x3e/0x7e0 fs/buffer.c:1586 ext4_block_write_begin+0x350/0x1400 fs/ext4/inode.c:1079 ext4_da_write_begin+0x671/0xad0 fs/ext4/inode.c:3081 generic_perform_write+0x300/0x5e0 mm/filemap.c:3926 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1453 [inline] free_pcp_prepare mm/page_alloc.c:1503 [inline] free_unref_page_prepare+0xf0e/0xf70 mm/page_alloc.c:3387 free_unref_page_list+0x6be/0x960 mm/page_alloc.c:3528 release_pages+0x219e/0x2470 mm/swap.c:1042 tlb_batch_pages_flush mm/mmu_gather.c:97 [inline] tlb_flush_mmu_free mm/mmu_gather.c:292 [inline] tlb_flush_mmu+0x100/0x210 mm/mmu_gather.c:299 tlb_finish_mmu+0xd4/0x1f0 mm/mmu_gather.c:391 exit_mmap+0x2c9/0x990 mm/mmap.c:3047 __mmput+0x115/0x3c0 kernel/fork.c:1209 exit_mm+0x227/0x310 kernel/exit.c:563 do_exit+0x612/0x2290 kernel/exit.c:856 do_group_exit+0x206/0x2c0 kernel/exit.c:1019 get_signal+0x1701/0x17e0 kernel/signal.c:2859 arch_do_signal_or_restart+0x91/0x670 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x2e0 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 Memory state around the buggy address: ffff888079627500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888079627580: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888079627600: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888079627680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888079627700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================