==================================================================
BUG: KASAN: use-after-free in tcp_retransmit_timer+0x6ee/0x2890 net/ipv4/tcp_timer.c:515
Read of size 8 at addr ffff888077ca9c98 by task syz-executor.4/7805
CPU: 1 PID: 7805 Comm: syz-executor.4 Not tainted 5.15.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
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_retransmit_timer+0x6ee/0x2890 net/ipv4/tcp_timer.c:515
tcp_write_timer_handler+0x1f7/0x9c0 net/ipv4/tcp_timer.c:626
tcp_write_timer+0x12e/0x280 net/ipv4/tcp_timer.c:646
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:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:console_unlock+0xe53/0x12b0 kernel/printk/printk.c:2739
Code: 00 48 83 7c 24 18 00 75 19 e8 d9 d4 19 00 eb 18 e8 d2 d4 19 00 e8 7d 01 b1 08 48 83 7c 24 18 00 74 e7 e8 c0 d4 19 00 fb 31 ff <44> 89 f6 e8 15 d8 19 00 31 db 45 85 f6 0f 95 c0 89 c1 0a 4c 24 17
RSP: 0018:ffffc900031fe5e0 EFLAGS: 00000246
RAX: ffffffff8165e5f0 RBX: 0000000000000000 RCX: ffff88804280d700
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900031fe870 R08: ffffffff8165e5bb R09: fffffbfff1f76e15
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff1a48f8e
R13: ffffffff8d247ca8 R14: 0000000000000000 R15: dffffc0000000000
vprintk_emit+0xba/0x150 kernel/printk/printk.c:2268
_printk+0xd1/0x111 kernel/printk/printk.c:2289
batadv_hardif_activate_interface+0x162/0x370 net/batman-adv/hard-interface.c:659
batadv_hard_if_event+0xbc/0x1770 net/batman-adv/hard-interface.c:953
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
__dev_notify_flags+0x304/0x610
dev_change_flags+0xe7/0x190 net/core/dev.c:8859
do_setlink+0xcd1/0x3af0 net/core/rtnetlink.c:2721
__rtnl_newlink net/core/rtnetlink.c:3395 [inline]
rtnl_newlink+0x177d/0x2060 net/core/rtnetlink.c:3510
rtnetlink_rcv_msg+0x993/0xee0 net/core/rtnetlink.c:5587
netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2533
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:1952
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg net/socket.c:724 [inline]
__sys_sendto+0x564/0x720 net/socket.c:2039
__do_sys_sendto net/socket.c:2051 [inline]
__se_sys_sendto net/socket.c:2047 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2047
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: 0033:0x7fb872d6619c
Code: fa fa ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 20 fb ff ff 48 8b
RSP: 002b:00007fff6094ca70 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fb8739fc620 RCX: 00007fb872d6619c
RDX: 000000000000002c RSI: 00007fb8739fc670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fff6094cac4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fb8739fc670 R14: 0000000000000003 R15: 0000000000000000
</TASK>
Allocated by task 7623:
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
copy_namespaces+0x365/0x3b0 kernel/nsproxy.c:178
copy_process+0x1841/0x3ef0 kernel/fork.c:2201
kernel_clone+0x210/0x960 kernel/fork.c:2601
__do_sys_clone kernel/fork.c:2718 [inline]
__se_sys_clone kernel/fork.c:2702 [inline]
__x64_sys_clone+0x23f/0x290 kernel/fork.c:2702
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 1144:
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:2306
worker_thread+0xaca/0x1280 kernel/workqueue.c:2453
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 ffff888077ca9a40
which belongs to the cache net_namespace of size 6464
The buggy address is located 600 bytes inside of
6464-byte region [ffff888077ca9a40, ffff888077cab380)
The buggy address belongs to the page:
page:ffffea0001df2a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888077cacec0 pfn:0x77ca8
head:ffffea0001df2a00 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff8880137c3b41
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 0000000100000001 ffff888011dc63c0
raw: ffff888077cacec0 0000000080040003 00000001ffffffff ffff8880137c3b41
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3967, ts 74658505910, free_ts 74647090924
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
copy_namespaces+0x365/0x3b0 kernel/nsproxy.c:178
copy_process+0x1841/0x3ef0 kernel/fork.c:2201
kernel_clone+0x210/0x960 kernel/fork.c:2601
__do_sys_clone kernel/fork.c:2718 [inline]
__se_sys_clone kernel/fork.c:2702 [inline]
__x64_sys_clone+0x23f/0x290 kernel/fork.c:2702
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]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc_trace+0xfb/0x290 mm/slub.c:3245
kmalloc include/linux/slab.h:591 [inline]
kzalloc include/linux/slab.h:721 [inline]
tomoyo_dump_page+0x115/0x660 security/tomoyo/domain.c:906
tomoyo_scan_bprm security/tomoyo/condition.c:130 [inline]
tomoyo_condition+0x1d83/0x2c00 security/tomoyo/condition.c:1120
tomoyo_check_acl+0x168/0x410 security/tomoyo/domain.c:177
tomoyo_execute_permission+0x139/0x410 security/tomoyo/file.c:615
tomoyo_find_next_domain+0x3ff/0x1cf0 security/tomoyo/domain.c:752
tomoyo_bprm_check_security+0xdb/0x120 security/tomoyo/tomoyo.c:101
Memory state around the buggy address:
ffff888077ca9b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888077ca9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888077ca9c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888077ca9d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888077ca9d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 00 48 83 add %cl,-0x7d(%rax)
3: 7c 24 jl 0x29
5: 18 00 sbb %al,(%rax)
7: 75 19 jne 0x22
9: e8 d9 d4 19 00 callq 0x19d4e7
e: eb 18 jmp 0x28
10: e8 d2 d4 19 00 callq 0x19d4e7
15: e8 7d 01 b1 08 callq 0x8b10197
1a: 48 83 7c 24 18 00 cmpq $0x0,0x18(%rsp)
20: 74 e7 je 0x9
22: e8 c0 d4 19 00 callq 0x19d4e7
27: fb sti
28: 31 ff xor %edi,%edi
* 2a: 44 89 f6 mov %r14d,%esi <-- trapping instruction
2d: e8 15 d8 19 00 callq 0x19d847
32: 31 db xor %ebx,%ebx
34: 45 85 f6 test %r14d,%r14d
37: 0f 95 c0 setne %al
3a: 89 c1 mov %eax,%ecx
3c: 0a 4c 24 17 or 0x17(%rsp),%cl