EXT4-fs (loop2): Ignoring removed orlov option EXT4-fs (loop2): mounted filesystem without journal. Opts: block_validity,bsddf,noacl,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,nogrpid,noauto_da_alloc,norecovery,,errors=continue. Quota mode: none. ================================================================== BUG: KASAN: use-after-free in ext4_xattr_list_entries fs/ext4/xattr.c:670 [inline] BUG: KASAN: use-after-free in ext4_xattr_ibody_list fs/ext4/xattr.c:740 [inline] BUG: KASAN: use-after-free in ext4_listxattr+0x4a9/0xc60 fs/ext4/xattr.c:765 Read of size 4 at addr ffff888111606090 by task syz.2.18/375 CPU: 0 PID: 375 Comm: syz.2.18 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x10f/0x150 mm/kasan/report.c:444 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308 ext4_xattr_list_entries fs/ext4/xattr.c:670 [inline] ext4_xattr_ibody_list fs/ext4/xattr.c:740 [inline] ext4_listxattr+0x4a9/0xc60 fs/ext4/xattr.c:765 vfs_listxattr fs/xattr.c:448 [inline] listxattr+0x28f/0x300 fs/xattr.c:783 path_listxattr+0xe1/0x1b0 fs/xattr.c:807 __do_sys_llistxattr fs/xattr.c:825 [inline] __se_sys_llistxattr fs/xattr.c:822 [inline] __x64_sys_llistxattr+0x7d/0x90 fs/xattr.c:822 x64_sys_call+0x584/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:196 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f264c485e59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc67095408 EFLAGS: 00000246 ORIG_RAX: 00000000000000c3 RAX: ffffffffffffffda RBX: 00007f264c70dfa0 RCX: 00007f264c485e59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000400 RBP: 00007f264c51be6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f264c70dfac R14: 00007f264c70dfa0 R15: 00007f264c70dfa0 Allocated by task 10: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] __kasan_slab_alloc+0xb7/0xe0 mm/kasan/common.c:466 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550 slab_alloc_node mm/slub.c:3245 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc+0xf7/0x260 mm/slub.c:3260 kmem_cache_alloc_node include/linux/slab.h:492 [inline] __alloc_skb+0xe4/0x730 net/core/skbuff.c:416 alloc_skb include/linux/skbuff.h:1183 [inline] nlmsg_new include/net/netlink.h:953 [inline] inet6_ifa_notify net/ipv6/addrconf.c:5540 [inline] __ipv6_ifa_notify+0x200/0xe70 net/ipv6/addrconf.c:6195 addrconf_ifdown+0xdb1/0x1910 net/ipv6/addrconf.c:3923 addrconf_notify+0x3bd/0xe00 net/ipv6/addrconf.c:-1 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2070 [inline] call_netdevice_notifiers_extack net/core/dev.c:2082 [inline] call_netdevice_notifiers net/core/dev.c:2096 [inline] dev_close_many+0x325/0x4d0 net/core/dev.c:1671 unregister_netdevice_many+0x477/0x1a00 net/core/dev.c:11152 ip_tunnel_delete_nets+0x343/0x390 net/ipv4/ip_tunnel.c:1123 ipgre_exit_batch_net+0x22/0x30 net/ipv4/ip_gre.c:1046 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x605/0xae0 net/core/net_namespace.c:599 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328 worker_thread+0xaa0/0x1250 kernel/workqueue.c:2475 kthread+0x3f5/0x4f0 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Freed by task 10: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4a/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:365 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754 slab_free mm/slub.c:3526 [inline] kmem_cache_free+0x100/0x320 mm/slub.c:3544 kfree_skbmem+0x10c/0x180 net/core/skbuff.c:-1 __kfree_skb net/core/skbuff.c:758 [inline] consume_skb+0xb3/0x1f0 net/core/skbuff.c:930 netlink_broadcast_filtered+0x1124/0x1220 net/netlink/af_netlink.c:1538 netlink_broadcast net/netlink/af_netlink.c:1560 [inline] nlmsg_multicast include/net/netlink.h:1033 [inline] nlmsg_notify+0xe9/0x1a0 net/netlink/af_netlink.c:2554 rtnl_notify+0x9a/0xc0 net/core/rtnetlink.c:762 inet6_ifa_notify net/ipv6/addrconf.c:5551 [inline] __ipv6_ifa_notify+0x24b/0xe70 net/ipv6/addrconf.c:6195 addrconf_ifdown+0xdb1/0x1910 net/ipv6/addrconf.c:3923 addrconf_notify+0x3bd/0xe00 net/ipv6/addrconf.c:-1 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2070 [inline] call_netdevice_notifiers_extack net/core/dev.c:2082 [inline] call_netdevice_notifiers net/core/dev.c:2096 [inline] dev_close_many+0x325/0x4d0 net/core/dev.c:1671 unregister_netdevice_many+0x477/0x1a00 net/core/dev.c:11152 ip_tunnel_delete_nets+0x343/0x390 net/ipv4/ip_tunnel.c:1123 ipgre_exit_batch_net+0x22/0x30 net/ipv4/ip_gre.c:1046 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x605/0xae0 net/core/net_namespace.c:599 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328 worker_thread+0xaa0/0x1250 kernel/workqueue.c:2475 kthread+0x3f5/0x4f0 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff888111606000 which belongs to the cache skbuff_head_cache of size 248 The buggy address is located 144 bytes inside of 248-byte region [ffff888111606000, ffff8881116060f8) The buggy address belongs to the page: page:ffffea0004458180 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x111606 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 ffffea00043fda80 0000000200000002 ffff8881081ab980 raw: 0000000000000000 00000000000c000c 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 103, ts 4570988842, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa0/0x4d0 mm/slub.c:2000 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033 __slab_alloc+0x49/0x90 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc+0x138/0x260 mm/slub.c:3260 kmem_cache_alloc_node include/linux/slab.h:492 [inline] __alloc_skb+0xe4/0x730 net/core/skbuff.c:416 alloc_skb include/linux/skbuff.h:1183 [inline] alloc_skb_with_frags+0xa8/0x620 net/core/skbuff.c:6207 sock_alloc_send_pskb+0x87f/0x9a0 net/core/sock.c:2542 unix_dgram_sendmsg+0x6f3/0x19b0 net/unix/af_unix.c:1816 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] sock_write_iter+0x2a6/0x3a0 net/socket.c:1079 call_write_iter include/linux/fs.h:2212 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x831/0xfd0 fs/read_write.c:594 ksys_write+0x14a/0x260 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:656 page_owner free stack trace missing Memory state around the buggy address: ffff888111605f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888111606000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888111606080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc ^ ffff888111606100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ffff888111606180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================