==================================================================
BUG: KASAN: use-after-free in tcp_probe_timer net/ipv4/tcp_timer.c:384 [inline]
BUG: KASAN: use-after-free in tcp_write_timer_handler+0x882/0x9c0 net/ipv4/tcp_timer.c:648
Read of size 1 at addr ffff8880761a868d by task syz-executor.3/11058

CPU: 0 PID: 11058 Comm: syz-executor.3 Not tainted 5.15.153-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description+0x63/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
 tcp_probe_timer net/ipv4/tcp_timer.c:384 [inline]
 tcp_write_timer_handler+0x882/0x9c0 net/ipv4/tcp_timer.c:648
 tcp_write_timer+0x12e/0x280 net/ipv4/tcp_timer.c:664
 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1737
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750
 __do_softirq+0x3b3/0x93a kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:unwind_next_frame+0x5/0x1fa0 arch/x86/kernel/unwind_orc.c:423
Code: 41 5e 41 5f c3 44 89 f1 80 e1 07 80 c1 03 38 c1 7c 95 4c 89 f7 e8 1b 91 91 00 eb 8b 66 0f 1f 84 00 00 00 00 00 55 41 57 41 56 <41> 55 41 54 53 48 81 ec 80 00 00 00 49 89 ff 48 b8 00 00 00 00 00
RSP: 0018:ffffc90002ea7080 EFLAGS: 00000283
RAX: ffffc90002ea7190 RBX: ffffc90002ea7138 RCX: 0000000080000000
RDX: dffffc0000000000 RSI: ffffc90002ea70f0 RDI: ffffc90002ea7100
RBP: 1ffff920005d4e21 R08: ffffc90002ea70f0 R09: ffffc90002ea7150
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920005d4e22
R13: ffffc90002ea7110 R14: ffffc90002ea7100 R15: ffffc90002ea7108
 __unwind_start+0x59d/0x720 arch/x86/kernel/unwind_orc.c:704
 unwind_start arch/x86/include/asm/unwind.h:60 [inline]
 arch_stack_walk+0xdb/0x140 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1705 [inline]
 slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
 slab_free mm/slub.c:3499 [inline]
 kmem_cache_free+0x91/0x1f0 mm/slub.c:3515
 xfs_rw_bdev+0x445/0x4c0 fs/xfs/xfs_bio_io.c:56
 xlog_do_io+0x167/0x310 fs/xfs/xfs_log_recover.c:147
 xlog_bread+0x30/0xc0 fs/xfs/xfs_log_recover.c:178
 xlog_rseek_logrec_hdr+0x316/0x530 fs/xfs/xfs_log_recover.c:813
 xlog_find_tail+0x26d/0xe30 fs/xfs/xfs_log_recover.c:1287
 xlog_recover+0xd9/0x530 fs/xfs/xfs_log_recover.c:3374
 xfs_log_mount+0x3d9/0x720 fs/xfs/xfs_log.c:716
 xfs_mountfs+0xba8/0x1ce0 fs/xfs/xfs_mount.c:764
 xfs_fs_fill_super+0x11b4/0x1400 fs/xfs/xfs_super.c:1676
 get_tree_bdev+0x3fe/0x620 fs/super.c:1312
 vfs_get_tree+0x88/0x270 fs/super.c:1517
 do_new_mount+0x2ba/0xb40 fs/namespace.c:3005
 do_mount fs/namespace.c:3348 [inline]
 __do_sys_mount fs/namespace.c:3556 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3533
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f5861def4aa
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f586036def8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f586036df80 RCX: 00007f5861def4aa
RDX: 0000000020009600 RSI: 0000000020009640 RDI: 00007f586036df40
RBP: 0000000020009600 R08: 00007f586036df80 R09: 0000000000018245
R10: 0000000000018245 R11: 0000000000000202 R12: 0000000020009640
R13: 00007f586036df40 R14: 000000000000989b R15: 0000000020000040
 </TASK>

Allocated by task 3525:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 __kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3220 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233
 kmem_cache_zalloc include/linux/slab.h:711 [inline]
 net_alloc net/core/net_namespace.c:405 [inline]
 copy_net_ns+0x143/0x5d0 net/core/net_namespace.c:460
 create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x11e/0x170 kernel/nsproxy.c:226
 ksys_unshare+0x580/0xb20 kernel/fork.c:3101
 __do_sys_unshare kernel/fork.c:3175 [inline]
 __se_sys_unshare kernel/fork.c:3173 [inline]
 __x64_sys_unshare+0x34/0x40 kernel/fork.c:3173
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 9:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1705 [inline]
 slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
 slab_free mm/slub.c:3499 [inline]
 kmem_cache_free+0x91/0x1f0 mm/slub.c:3515
 net_free net/core/net_namespace.c:434 [inline]
 cleanup_net+0xab5/0xb60 net/core/net_namespace.c:617
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff8880761a8000
 which belongs to the cache net_namespace of size 6464
The buggy address is located 1677 bytes inside of
 6464-byte region [ffff8880761a8000, ffff8880761a9940)
The buggy address belongs to the page:
page:ffffea0001d86a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x761a8
head:ffffea0001d86a00 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff88801e7d4141
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888011dea3c0
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff88801e7d4141
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 3525, ts 42987214155, free_ts 42980215212
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
 __alloc_pages+0x272/0x700 mm/page_alloc.c:5421
 alloc_slab_page mm/slub.c:1775 [inline]
 allocate_slab mm/slub.c:1912 [inline]
 new_slab+0xbb/0x4b0 mm/slub.c:1975
 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
 __slab_alloc mm/slub.c:3095 [inline]
 slab_alloc_node mm/slub.c:3186 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0x18e/0x280 mm/slub.c:3233
 kmem_cache_zalloc include/linux/slab.h:711 [inline]
 net_alloc net/core/net_namespace.c:405 [inline]
 copy_net_ns+0x143/0x5d0 net/core/net_namespace.c:460
 create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x11e/0x170 kernel/nsproxy.c:226
 ksys_unshare+0x580/0xb20 kernel/fork.c:3101
 __do_sys_unshare kernel/fork.c:3175 [inline]
 __se_sys_unshare kernel/fork.c:3173 [inline]
 __x64_sys_unshare+0x34/0x40 kernel/fork.c:3173
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1340 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
 free_slab mm/slub.c:2015 [inline]
 discard_slab mm/slub.c:2021 [inline]
 __unfreeze_partials+0x1b7/0x210 mm/slub.c:2507
 put_cpu_partial+0x132/0x1a0 mm/slub.c:2587
 do_slab_free mm/slub.c:3487 [inline]
 ___cache_free+0xe3/0x100 mm/slub.c:3506
 qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3220 [inline]
 kmem_cache_alloc_node+0x121/0x2c0 mm/slub.c:3256
 __alloc_skb+0xdd/0x590 net/core/skbuff.c:415
 alloc_skb include/linux/skbuff.h:1167 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 netlink_ack+0x33c/0xb10 net/netlink/af_netlink.c:2440
 netlink_rcv_skb+0x24c/0x410 net/netlink/af_netlink.c:2511
 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline]
 netlink_unicast+0x7b6/0x980 net/netlink/af_netlink.c:1356
 netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1924
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x564/0x720 net/socket.c:2058

Memory state around the buggy address:
 ffff8880761a8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880761a8600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880761a8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff8880761a8700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880761a8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
   0:	41 5e                	pop    %r14
   2:	41 5f                	pop    %r15
   4:	c3                   	ret
   5:	44 89 f1             	mov    %r14d,%ecx
   8:	80 e1 07             	and    $0x7,%cl
   b:	80 c1 03             	add    $0x3,%cl
   e:	38 c1                	cmp    %al,%cl
  10:	7c 95                	jl     0xffffffa7
  12:	4c 89 f7             	mov    %r14,%rdi
  15:	e8 1b 91 91 00       	call   0x919135
  1a:	eb 8b                	jmp    0xffffffa7
  1c:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  23:	00 00
  25:	55                   	push   %rbp
  26:	41 57                	push   %r15
  28:	41 56                	push   %r14
* 2a:	41 55                	push   %r13 <-- trapping instruction
  2c:	41 54                	push   %r12
  2e:	53                   	push   %rbx
  2f:	48 81 ec 80 00 00 00 	sub    $0x80,%rsp
  36:	49 89 ff             	mov    %rdi,%r15
  39:	48                   	rex.W
  3a:	b8 00 00 00 00       	mov    $0x0,%eax