ERROR: (device loop0): remounting filesystem as read-only blkno = 400000, nblocks = 0 ERROR: (device loop0): dbFree: block to be freed is outside the map ================================================================== BUG: KASAN: slab-use-after-free in jfs_lazycommit+0x7de/0xb70 fs/jfs/jfs_txnmgr.c:2735 Read of size 4 at addr ffff8880281fb694 by task jfsCommit/108 CPU: 0 PID: 108 Comm: jfsCommit Not tainted 6.6.0-rc3-syzkaller-00214-ge402b08634b3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 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 jfs_lazycommit+0x7de/0xb70 fs/jfs/jfs_txnmgr.c:2735 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Allocated by task 8002: 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:599 [inline] kzalloc include/linux/slab.h:720 [inline] jfs_fill_super+0xff/0xc50 fs/jfs/super.c:495 mount_bdev+0x237/0x300 fs/super.c:1629 legacy_get_tree+0xef/0x190 fs/fs_context.c:638 vfs_get_tree+0x8c/0x280 fs/super.c:1750 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 7916: 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:522 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] __kmem_cache_free+0x25f/0x3b0 mm/slub.c:3822 generic_shutdown_super+0x13a/0x2c0 fs/super.c:693 kill_block_super+0x41/0x70 fs/super.c:1646 deactivate_locked_super+0xa4/0x110 fs/super.c:481 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254 task_work_run+0x24a/0x300 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xde/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:285 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2653 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2767 free_fib_info net/ipv4/fib_semantics.c:257 [inline] fib_info_put include/net/ip_fib.h:581 [inline] fib_release_info+0x620/0x6e0 net/ipv4/fib_semantics.c:283 fib_table_flush+0xb90/0x11a0 net/ipv4/fib_trie.c:2093 fib_flush net/ipv4/fib_frontend.c:195 [inline] fib_disable_ip net/ipv4/fib_frontend.c:1426 [inline] fib_netdev_event+0x447/0x760 net/ipv4/fib_frontend.c:1495 notifier_call_chain+0x18c/0x3a0 kernel/notifier.c:93 call_netdevice_notifiers_info net/core/dev.c:1970 [inline] call_netdevice_notifiers_extack net/core/dev.c:2008 [inline] call_netdevice_notifiers net/core/dev.c:2022 [inline] dev_close_many+0x386/0x530 net/core/dev.c:1563 unregister_netdevice_many_notify+0x4ec/0x1900 net/core/dev.c:10911 xfrmi_exit_batch_net+0x30f/0x350 net/xfrm/xfrm_interface_core.c:984 ops_exit_list net/core/net_namespace.c:175 [inline] cleanup_net+0x767/0xb80 net/core/net_namespace.c:614 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 The buggy address belongs to the object at ffff8880281fb600 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 148 bytes inside of freed 256-byte region [ffff8880281fb600, ffff8880281fb700) The buggy address belongs to the physical page: page:ffffea0000a07e80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x281fa head:ffffea0000a07e80 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888012841b40 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 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5390, tgid 5390 (syz-executor.0), ts 105212028432, free_ts 104819748835 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x31db/0x3360 mm/page_alloc.c:3170 __alloc_pages+0x255/0x670 mm/page_alloc.c:4426 alloc_slab_page+0x6a/0x160 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x84/0x2f0 mm/slub.c:2070 ___slab_alloc+0xc85/0x1310 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x1af/0x270 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1022 [inline] __kmalloc+0xa8/0x230 mm/slab_common.c:1036 kmalloc include/linux/slab.h:603 [inline] kzalloc include/linux/slab.h:720 [inline] fib_create_info+0xa3b/0x2510 net/ipv4/fib_semantics.c:1455 fib_table_insert+0x1f6/0x1f20 net/ipv4/fib_trie.c:1236 fib_magic net/ipv4/fib_frontend.c:1104 [inline] fib_add_ifaddr+0x483/0x1730 net/ipv4/fib_frontend.c:1126 fib_inetaddr_event+0x12f/0x2c0 net/ipv4/fib_frontend.c:1440 notifier_call_chain+0x18c/0x3a0 kernel/notifier.c:93 blocking_notifier_call_chain+0x69/0x90 kernel/notifier.c:388 __inet_insert_ifa+0x9cf/0xc20 net/ipv4/devinet.c:556 inet_rtm_newaddr+0x1107/0x1ad0 net/ipv4/devinet.c:976 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405 __slab_free+0x2f6/0x390 mm/slub.c:3715 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x67/0x3d0 mm/slab.h:762 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x148/0x330 mm/slub.c:3523 __alloc_skb+0x181/0x420 net/core/skbuff.c:640 alloc_skb include/linux/skbuff.h:1286 [inline] nlmsg_new include/net/netlink.h:999 [inline] netlink_ack+0x396/0x1290 net/netlink/af_netlink.c:2482 netlink_rcv_skb+0x25c/0x430 net/netlink/af_netlink.c:2551 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x7dc/0x970 net/netlink/af_netlink.c:1368 netlink_sendmsg+0xa37/0xd70 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg net/socket.c:753 [inline] __sys_sendto+0x484/0x640 net/socket.c:2177 __do_sys_sendto net/socket.c:2189 [inline] __se_sys_sendto net/socket.c:2185 [inline] __x64_sys_sendto+0xde/0xf0 net/socket.c:2185 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 Memory state around the buggy address: ffff8880281fb580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880281fb600: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880281fb680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880281fb700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880281fb780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================