================================================================== BUG: KASAN: double-free in dbUnmount+0xf8/0x110 fs/jfs/jfs_dmap.c:265 Free of addr ffff888036717000 by task syz-executor.2/5023 CPU: 1 PID: 5023 Comm: syz-executor.2 Not tainted 6.4.0-rc1-syzkaller-00109-gcc3c44c9fda2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 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: 0033:0x7f8cc488d5d7 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:00007ffc635c9fd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f8cc488d5d7 RDX: 00007ffc635ca0ab RSI: 000000000000000a RDI: 00007ffc635ca0a0 RBP: 00007ffc635ca0a0 R08: 00000000ffffffff R09: 00007ffc635c9e70 R10: 0000555556cea8b3 R11: 0000000000000246 R12: 00007f8cc48e6cdc R13: 00007ffc635cb160 R14: 0000555556cea810 R15: 00007ffc635cb1a0 Allocated by task 28472: 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+0x274/0x3a0 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 28494: 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 add_new_keypair drivers/net/wireguard/noise.c:248 [inline] wg_noise_handshake_begin_session+0x61f/0xb60 drivers/net/wireguard/noise.c:845 wg_packet_send_handshake_response+0x120/0x2d0 drivers/net/wireguard/send.c:96 wg_receive_handshake_packet drivers/net/wireguard/receive.c:154 [inline] wg_packet_handshake_receive_worker+0x5dd/0xf00 drivers/net/wireguard/receive.c:213 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 ffff888036717000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 0 bytes inside of 2048-byte region [ffff888036717000, ffff888036717800) The buggy address belongs to the physical page: page:ffffea0000d9c400 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888036716000 pfn:0x36710 head:ffffea0000d9c400 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: ffff888036716000 0000000080080007 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 0xd28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5030, tgid 5030 (syz-executor.5), ts 217913855834, free_ts 0 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_node_track_caller+0xa5/0x230 mm/slab_common.c:986 kmalloc_reserve+0xfe/0x240 net/core/skbuff.c:585 pskb_expand_head+0x202/0x1340 net/core/skbuff.c:2054 netlink_trim+0x183/0x220 net/netlink/af_netlink.c:1321 netlink_broadcast+0x5e/0x1160 net/netlink/af_netlink.c:1517 nlmsg_multicast include/net/netlink.h:1083 [inline] nlmsg_notify+0xff/0x1c0 net/netlink/af_netlink.c:2589 rtnl_notify net/core/rtnetlink.c:771 [inline] rtmsg_ifinfo_send net/core/rtnetlink.c:4016 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:4032 [inline] rtnetlink_event+0x218/0x260 net/core/rtnetlink.c:6446 notifier_call_chain+0x18c/0x3a0 kernel/notifier.c:93 call_netdevice_notifiers_info net/core/dev.c:1935 [inline] call_netdevice_notifiers_extack net/core/dev.c:1973 [inline] call_netdevice_notifiers net/core/dev.c:1987 [inline] dev_set_mac_address+0x329/0x470 net/core/dev.c:8827 page_owner free stack trace missing Memory state around the buggy address: ffff888036716f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888036716f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888036717000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888036717080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888036717100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================