================================================================== BUG: KASAN: slab-use-after-free in lbmIODone+0x135f/0x1750 fs/jfs/jfs_logmgr.c:2179 Read of size 4 at addr ffff888035d06108 by task ksoftirqd/0/15 CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.4.0-syzkaller-10173-ga901a3568fd2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 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:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 lbmIODone+0x135f/0x1750 fs/jfs/jfs_logmgr.c:2179 req_bio_endio block/blk-mq.c:766 [inline] blk_update_request+0x53f/0x1020 block/blk-mq.c:911 blk_mq_end_request+0x50/0x310 block/blk-mq.c:1032 blk_complete_reqs block/blk-mq.c:1110 [inline] blk_done_softirq+0x103/0x150 block/blk-mq.c:1115 __do_softirq+0x2ab/0x908 kernel/softirq.c:553 run_ksoftirqd+0xc5/0x120 kernel/softirq.c:921 smpboot_thread_fn+0x533/0x9f0 kernel/smpboot.c:164 kthread+0x2b8/0x350 kernel/kthread.c:389 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 6779: 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:579 [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+0x276/0x3b0 fs/super.c:1391 legacy_get_tree+0xef/0x190 fs/fs_context.c:611 vfs_get_tree+0x8c/0x270 fs/super.c:1519 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861 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 5025: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 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:1792 [inline] slab_free_freelist_hook mm/slub.c:1818 [inline] slab_free mm/slub.c:3801 [inline] __kmem_cache_free+0x25f/0x3b0 mm/slub.c:3814 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:499 kill_block_super+0x68/0xa0 fs/super.c:1417 deactivate_locked_super+0xa4/0x110 fs/super.c:330 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254 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:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 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 ffff888035d06100 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 8 bytes inside of freed 192-byte region [ffff888035d06100, ffff888035d061c0) The buggy address belongs to the physical page: page:ffffea0000d74180 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x35d06 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000200 ffff888012841a00 dead000000000100 dead000000000122 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 6414, tgid 6414 (udevadm), ts 266334769783, free_ts 266331282651 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0x31e8/0x3370 mm/page_alloc.c:3221 __alloc_pages+0x255/0x670 mm/page_alloc.c:4477 __alloc_pages_node include/linux/gfp.h:237 [inline] alloc_slab_page+0x59/0x160 mm/slub.c:1864 allocate_slab mm/slub.c:2009 [inline] new_slab+0x84/0x2f0 mm/slub.c:2062 ___slab_alloc+0xade/0x1100 mm/slub.c:3215 __slab_alloc mm/slub.c:3314 [inline] __slab_alloc_node mm/slub.c:3367 [inline] slab_alloc_node mm/slub.c:3460 [inline] __kmem_cache_alloc_node+0x1af/0x270 mm/slub.c:3509 __do_kmalloc_node mm/slab_common.c:984 [inline] __kmalloc_node+0xa7/0x230 mm/slab_common.c:992 kmalloc_array_node include/linux/slab.h:677 [inline] kcalloc_node include/linux/slab.h:682 [inline] memcg_alloc_slab_cgroups+0x81/0x120 mm/memcontrol.c:2899 account_slab mm/slab.h:636 [inline] allocate_slab mm/slub.c:2027 [inline] new_slab+0xc0/0x2f0 mm/slub.c:2062 ___slab_alloc+0xade/0x1100 mm/slub.c:3215 __slab_alloc mm/slub.c:3314 [inline] __slab_alloc_node mm/slub.c:3367 [inline] slab_alloc_node mm/slub.c:3460 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc+0x1bf/0x300 mm/slub.c:3494 vma_lock_alloc kernel/fork.c:459 [inline] vm_area_dup+0x61/0x280 kernel/fork.c:512 __split_vma+0x1c7/0x7f0 mm/mmap.c:2339 do_vmi_align_munmap+0x501/0x15c0 mm/mmap.c:2477 do_vmi_munmap+0x24d/0x2d0 mm/mmap.c:2619 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1161 [inline] free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2348 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2443 pipe_buf_release include/linux/pipe_fs_i.h:203 [inline] pipe_read+0x6e6/0x1300 fs/pipe.c:324 call_read_iter include/linux/fs.h:1865 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x795/0xb00 fs/read_write.c:470 ksys_read+0x1a0/0x2c0 fs/read_write.c:613 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 Memory state around the buggy address: ffff888035d06000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888035d06080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888035d06100: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888035d06180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888035d06200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================