==================================================================
BUG: KASAN: use-after-free in tcp_retransmit_timer+0x6ee/0x2890 net/ipv4/tcp_timer.c:515
Read of size 8 at addr ffff888075015118 by task syz-executor.5/18406
CPU: 0 PID: 18406 Comm: syz-executor.5 Not tainted 5.15.111-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
__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:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 42 8e a5 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 f7 62 33 f7 65 8b 05 f8 be de 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc90002d0fba0 EFLAGS: 00000206
RAX: 31c4a906a61f0f00 RBX: 1ffff920005a1f78 RCX: ffffffff913bf003
RDX: dffffc0000000000 RSI: ffffffff8a8afb60 RDI: 0000000000000001
RBP: ffffc90002d0fc30 R08: ffffffff81865480 R09: ffffed1017345441
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff920005a1f74 R14: ffffc90002d0fbc0 R15: 0000000000000246
hrtimer_start_expires include/linux/hrtimer.h:432 [inline]
hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1965 [inline]
do_nanosleep+0x164/0x7b0 kernel/time/hrtimer.c:2041
hrtimer_nanosleep+0x24d/0x490 kernel/time/hrtimer.c:2097
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1281 [inline]
__se_sys_clock_nanosleep+0x323/0x3b0 kernel/time/posix-timers.c:1258
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: 0033:0x7f3853130e91
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f
RSP: 002b:00007ffd92649770 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00007f385322bf80 RCX: 00007f3853130e91
RDX: 00007ffd926497b0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f385322d980 R08: 0000000000000000 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000cf5fa
R13: 00007ffd926498c0 R14: 00007ffd926498e0 R15: 0000000000000032
Allocated by task 13188:
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:3094
__do_sys_unshare kernel/fork.c:3168 [inline]
__se_sys_unshare kernel/fork.c:3166 [inline]
__x64_sys_unshare+0x34/0x40 kernel/fork.c:3166
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 154:
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:2307
worker_thread+0xaca/0x1280 kernel/workqueue.c:2454
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 ffff888075014ec0
which belongs to the cache net_namespace of size 6464
The buggy address is located 600 bytes inside of
6464-byte region [ffff888075014ec0, ffff888075016800)
The buggy address belongs to the page:
page:ffffea0001d40400 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888075011a40 pfn:0x75010
head:ffffea0001d40400 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff88801f018881
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 0000000100000001 ffff888011dc63c0
raw: ffff888075011a40 0000000080040002 00000001ffffffff ffff88801f018881
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 10607, ts 439067258067, free_ts 439012747064
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]
inetdev_init+0x7e/0x470 net/ipv4/devinet.c:259
inetdev_event+0x29b/0x1490 net/ipv4/devinet.c:1530
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
call_netdevice_notifiers_info net/core/dev.c:1998 [inline]
call_netdevice_notifiers_extack net/core/dev.c:2010 [inline]
call_netdevice_notifiers+0x145/0x1b0 net/core/dev.c:2024
register_netdevice+0x12c2/0x1700 net/core/dev.c:10358
register_netdev+0x37/0x50 net/core/dev.c:10451
Memory state around the buggy address:
ffff888075015000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888075015080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888075015100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888075015180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888075015200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 9c pushfq
1: 8f 44 24 20 popq 0x20(%rsp)
5: 42 80 3c 23 00 cmpb $0x0,(%rbx,%r12,1)
a: 74 08 je 0x14
c: 4c 89 f7 mov %r14,%rdi
f: e8 42 8e a5 f7 callq 0xf7a58e56
14: f6 44 24 21 02 testb $0x2,0x21(%rsp)
19: 75 4e jne 0x69
1b: 41 f7 c7 00 02 00 00 test $0x200,%r15d
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 f7 62 33 f7 callq 0xf7336326 <-- trapping instruction
2f: 65 8b 05 f8 be de 75 mov %gs:0x75debef8(%rip),%eax # 0x75debf2e
36: 85 c0 test %eax,%eax
38: 74 3f je 0x79
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: 04 24 add $0x24,%al
3e: 0e (bad)
3f: 36 ss