==================================================================
BUG: KASAN: use-after-free in tcp_retransmit_timer+0x6ee/0x2890 net/ipv4/tcp_timer.c:515
Read of size 8 at addr ffff88807eeed118 by task syz-executor.5/23974
CPU: 0 PID: 23974 Comm: syz-executor.5 Not tainted 5.15.107-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
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:1097
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__tlb_remove_page_size+0x92/0x3e0 mm/mmu_gather.c:81
Code: 00 74 08 4c 89 ff e8 7d 56 0e 00 4d 8b 2f 49 8d 7d 08 48 89 f8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 48 02 00 00 41 8b 45 08 <8d> 68 01 41 89 6d 08 49 8d 5c c5 10 48 89 d8 48 c1 e8 03 42 80 3c
RSP: 0018:ffffc90003b4f3d8 EFLAGS: 00000246
RAX: 00000000000001ce RBX: ffffffffffffffff RCX: ffff88801b7bba00
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffff888056b3b008
RBP: ffffc90003b4f7e0 R08: ffffffff81babafb R09: fffff940002f52b7
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888056b3b000 R14: 1ffff92000769f01 R15: ffffc90003b4f808
__tlb_remove_page include/asm-generic/tlb.h:444 [inline]
zap_pte_range mm/memory.c:1376 [inline]
zap_pmd_range mm/memory.c:1494 [inline]
zap_pud_range mm/memory.c:1523 [inline]
zap_p4d_range mm/memory.c:1544 [inline]
unmap_page_range+0x10d8/0x2630 mm/memory.c:1565
unmap_vmas+0x1f8/0x390 mm/memory.c:1642
exit_mmap+0x3b6/0x670 mm/mmap.c:3186
__mmput+0x112/0x3b0 kernel/fork.c:1118
exit_mm+0x688/0x7f0 kernel/exit.c:548
do_exit+0x626/0x2480 kernel/exit.c:859
do_group_exit+0x144/0x310 kernel/exit.c:994
get_signal+0xc66/0x14e0 kernel/signal.c:2889
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f2df4c5e169
Code: Unable to access opcode bytes at RIP 0x7f2df4c5e13f.
RSP: 002b:00007f2df31af218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f2df4d7e058 RCX: 00007f2df4c5e169
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f2df4d7e058
RBP: 00007f2df4d7e050 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2df4d7e05c
R13: 00007ffe84c900cf R14: 00007f2df31af300 R15: 0000000000022000
Allocated by task 12445:
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
The buggy address belongs to the object at ffff88807eeecec0
which belongs to the cache net_namespace of size 6464
The buggy address is located 600 bytes inside of
6464-byte region [ffff88807eeecec0, ffff88807eeee800)
The buggy address belongs to the page:
page:ffffea0001fbba00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807eeecec0 pfn:0x7eee8
head:ffffea0001fbba00 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff8880161b1d81
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0001da5c08 ffffea0001f68208 ffff888011dc63c0
raw: ffff88807eeecec0 0000000000040003 00000001ffffffff ffff8880161b1d81
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 3603, ts 51015966016, free_ts 50762345814
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: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
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
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]
__kmalloc+0x120/0x300 mm/slub.c:4403
kmalloc include/linux/slab.h:596 [inline]
tomoyo_add_entry security/tomoyo/common.c:2031 [inline]
tomoyo_supervisor+0xe67/0x12c0 security/tomoyo/common.c:2103
tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline]
tomoyo_env_perm+0x174/0x210 security/tomoyo/environ.c:63
tomoyo_environ security/tomoyo/domain.c:672 [inline]
tomoyo_find_next_domain+0x137e/0x1cf0 security/tomoyo/domain.c:879
tomoyo_bprm_check_security+0xdb/0x120 security/tomoyo/tomoyo.c:101
security_bprm_check+0x5f/0xa0 security/security.c:868
search_binary_handler fs/exec.c:1722 [inline]
exec_binprm fs/exec.c:1775 [inline]
bprm_execve+0x84e/0x17c0 fs/exec.c:1844
do_execveat_common+0x583/0x720 fs/exec.c:1949
do_execve fs/exec.c:2019 [inline]
__do_sys_execve fs/exec.c:2095 [inline]
__se_sys_execve fs/exec.c:2090 [inline]
__x64_sys_execve+0x8e/0xa0 fs/exec.c:2090
Memory state around the buggy address:
ffff88807eeed000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807eeed080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807eeed100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807eeed180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807eeed200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 00 74 08 4c add %dh,0x4c(%rax,%rcx,1)
4: 89 ff mov %edi,%edi
6: e8 7d 56 0e 00 callq 0xe5688
b: 4d 8b 2f mov (%r15),%r13
e: 49 8d 7d 08 lea 0x8(%r13),%rdi
12: 48 89 f8 mov %rdi,%rax
15: 48 c1 e8 03 shr $0x3,%rax
19: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax
1e: 84 c0 test %al,%al
20: 0f 85 48 02 00 00 jne 0x26e
26: 41 8b 45 08 mov 0x8(%r13),%eax
* 2a: 8d 68 01 lea 0x1(%rax),%ebp <-- trapping instruction
2d: 41 89 6d 08 mov %ebp,0x8(%r13)
31: 49 8d 5c c5 10 lea 0x10(%r13,%rax,8),%rbx
36: 48 89 d8 mov %rbx,%rax
39: 48 c1 e8 03 shr $0x3,%rax
3d: 42 rex.X
3e: 80 .byte 0x80
3f: 3c .byte 0x3c