================================================================== BUG: KASAN: double-free in dbUnmount+0xf8/0x110 fs/jfs/jfs_dmap.c:265 Free of addr ffff88807dac7000 by task syz-executor.2/6305 CPU: 0 PID: 6305 Comm: syz-executor.2 Not tainted 6.4.0-rc5-syzkaller-00002-gf8dba31b0a82 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 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:351 [inline] print_report+0x163/0x540 mm/kasan/report.c:462 kasan_report_invalid_free+0xeb/0x100 mm/kasan/report.c:537 ____kasan_slab_free+0xfb/0x120 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:3786 [inline] __kmem_cache_free+0x264/0x3c0 mm/slub.c:3799 dbUnmount+0xf8/0x110 fs/jfs/jfs_dmap.c:265 jfs_umount+0x238/0x3a0 fs/jfs/jfs_umount.c:87 jfs_put_super+0x8a/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x134/0x340 fs/super.c:500 kill_block_super+0x84/0xf0 fs/super.c:1407 deactivate_locked_super+0xa4/0x110 fs/super.c:331 cleanup_mnt+0x426/0x4c0 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: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 RIP: 0033:0x7fb3f208d5d7 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffa18b4358 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fb3f208d5d7 RDX: 00007fffa18b442b RSI: 000000000000000a RDI: 00007fffa18b4420 RBP: 00007fffa18b4420 R08: 00000000ffffffff R09: 00007fffa18b41f0 R10: 0000555556cdc893 R11: 0000000000000246 R12: 00007fb3f20e6cdc R13: 00007fffa18b54e0 R14: 0000555556cdc810 R15: 00007fffa18b5520 Allocated by task 11635: 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:559 [inline] dbMount+0x58/0x960 fs/jfs/jfs_dmap.c:164 jfs_mount+0x1e5/0x830 fs/jfs/jfs_mount.c:121 jfs_fill_super+0x59c/0xc50 fs/jfs/super.c:556 mount_bdev+0x2d0/0x3f0 fs/super.c:1380 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1510 do_new_mount+0x28f/0xae0 fs/namespace.c:3039 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3568 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 11660: 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:3786 [inline] __kmem_cache_free+0x264/0x3c0 mm/slub.c:3799 dbUnmount+0xf8/0x110 fs/jfs/jfs_dmap.c:265 jfs_mount_rw+0x4ac/0x6a0 fs/jfs/jfs_mount.c:247 jfs_remount+0x3d1/0x6b0 fs/jfs/super.c:454 reconfigure_super+0x3c9/0x7c0 fs/super.c:956 vfs_fsconfig_locked fs/fsopen.c:254 [inline] __do_sys_fsconfig fs/fsopen.c:439 [inline] __se_sys_fsconfig+0xa29/0xf70 fs/fsopen.c:314 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 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:491 __call_rcu_common kernel/rcu/tree.c:2627 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2741 wg_noise_keypairs_clear+0x1b1/0x2e0 drivers/net/wireguard/noise.c:174 wg_pm_notification+0xbe/0x150 drivers/net/wireguard/device.c:85 notifier_call_chain+0x18c/0x3a0 kernel/notifier.c:93 notifier_call_chain_robust kernel/notifier.c:128 [inline] blocking_notifier_call_chain_robust+0xe8/0x1e0 kernel/notifier.c:353 pm_notifier_call_chain_robust+0x2c/0x60 kernel/power/main.c:104 snapshot_open+0x19e/0x280 kernel/power/user.c:77 misc_open+0x308/0x380 drivers/char/misc.c:165 chrdev_open+0x54e/0x630 fs/char_dev.c:414 do_dentry_open+0x7f9/0x10f0 fs/open.c:920 do_open fs/namei.c:3636 [inline] path_openat+0x27b3/0x3170 fs/namei.c:3791 do_filp_open+0x234/0x490 fs/namei.c:3818 do_sys_openat2+0x13f/0x500 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1383 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 Second to last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:491 __call_rcu_common kernel/rcu/tree.c:2627 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2741 netlink_release+0x146a/0x18f0 net/netlink/af_netlink.c:828 __sock_release net/socket.c:653 [inline] sock_release+0x7e/0x140 net/socket.c:681 xfrm_user_net_exit+0x5f/0xa0 net/xfrm/xfrm_user.c:3850 ops_exit_list net/core/net_namespace.c:175 [inline] cleanup_net+0x767/0xb80 net/core/net_namespace.c:614 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552 kthread+0x2b8/0x350 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff88807dac7000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 0 bytes inside of 2048-byte region [ffff88807dac7000, ffff88807dac7800) The buggy address belongs to the physical page: page:ffffea0001f6b000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7dac0 head:ffffea0001f6b000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888012442000 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5027, tgid 5027 (syz-executor.2), ts 199070458999, free_ts 191020893087 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1731 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0x321c/0x33a0 mm/page_alloc.c:3502 __alloc_pages+0x255/0x670 mm/page_alloc.c:4768 alloc_slab_page+0x6a/0x160 mm/slub.c:1851 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3192 __slab_alloc mm/slub.c:3291 [inline] __slab_alloc_node mm/slub.c:3344 [inline] slab_alloc_node mm/slub.c:3441 [inline] __kmem_cache_alloc_node+0x1b8/0x290 mm/slub.c:3490 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc+0xa8/0x230 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] sk_prot_alloc+0xe0/0x210 net/core/sock.c:2035 sk_alloc+0x38/0x370 net/core/sock.c:2088 __netlink_create+0x6b/0x2c0 net/netlink/af_netlink.c:649 __netlink_kernel_create+0x1d3/0x760 net/netlink/af_netlink.c:2038 netlink_kernel_create include/linux/netlink.h:61 [inline] diag_net_init+0xad/0x130 net/core/sock_diag.c:322 ops_init+0x351/0x600 net/core/net_namespace.c:136 setup_net+0x4b9/0xb90 net/core/net_namespace.c:339 copy_net_ns+0x4cb/0x790 net/core/net_namespace.c:491 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2564 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2659 qlist_free_all+0x22/0x60 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:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:711 slab_alloc_node mm/slub.c:3451 [inline] kmem_cache_alloc_node+0x157/0x350 mm/slub.c:3496 __alloc_skb+0x181/0x420 net/core/skbuff.c:644 alloc_skb_fclone include/linux/skbuff.h:1338 [inline] tcp_stream_alloc_skb+0x42/0x310 net/ipv4/tcp.c:866 tcp_sendmsg_locked+0xdb4/0x4100 net/ipv4/tcp.c:1329 tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1487 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg net/socket.c:747 [inline] sock_write_iter+0x397/0x520 net/socket.c:1140 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x790/0xb20 fs/read_write.c:584 ksys_write+0x1a0/0x2c0 fs/read_write.c:637 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: ffff88807dac6f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807dac6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807dac7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807dac7080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807dac7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 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