==================================================================
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 ffff88807a31bb0d by task syz-executor.4/10210
CPU: 0 PID: 10210 Comm: syz-executor.4 Not tainted 5.15.153-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
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_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
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:is_zone_device_page include/linux/mm.h:1137 [inline]
RIP: 0010:release_pages+0x2dc/0x1f40 mm/swap.c:911
Code: e8 e9 26 1d 00 49 8b 1e 48 b8 00 00 00 00 00 00 80 03 48 21 c3 49 bf 00 00 00 00 00 00 00 02 4c 89 ff 48 89 de e8 b4 6b d3 ff <4c> 39 fb 75 56 4d 85 ed 0f 84 72 02 00 00 e8 c1 67 d3 ff 48 b8 00
RSP: 0018:ffffc90003267600 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0080000000000000 RCX: ffff88807c175940
RDX: 0000000000000000 RSI: 0080000000000000 RDI: 0200000000000000
RBP: ffffc90003267728 R08: ffffffff81acd1dc R09: fffff9400032f70f
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffd400032f710
R13: 0000000000000000 R14: ffffea000197b880 R15: 0200000000000000
tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:240 [inline]
tlb_flush_mmu mm/mmu_gather.c:247 [inline]
tlb_finish_mmu+0x177/0x320 mm/mmu_gather.c:338
exit_mmap+0x3cd/0x670 mm/mmap.c:3188
__mmput+0x112/0x3b0 kernel/fork.c:1126
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:867
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: 0033:0x7fa3bc6a0da9
Code: Unable to access opcode bytes at RIP 0x7fa3bc6a0d7f.
RSP: 002b:00007fa3bac21178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fa3bc7cef88 RCX: 00007fa3bc6a0da9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fa3bc7cef8c
RBP: 00007fa3bc7cef80 R08: 0000000000000010 R09: 00007fa3bac216c0
R10: 0000000000000004 R11: 0000000000000246 R12: 00007fa3bc7cef8c
R13: 000000000000000b R14: 00007ffdb29744e0 R15: 00007ffdb29745c8
Allocated by task 3532:
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
The buggy address belongs to the object at ffff88807a31b480
which belongs to the cache net_namespace of size 6464
The buggy address is located 1677 bytes inside of
6464-byte region [ffff88807a31b480, ffff88807a31cdc0)
The buggy address belongs to the page:
page:ffffea0001e8c600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807a31b480 pfn:0x7a318
head:ffffea0001e8c600 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff888073574c41
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 0000000100000001 ffff888011dea3c0
raw: ffff88807a31b480 0000000080040002 00000001ffffffff ffff888073574c41
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 3524, ts 51645753919, free_ts 51631571532
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]
__kmalloc_node+0x151/0x390 mm/slub.c:4451
kmalloc_node include/linux/slab.h:614 [inline]
kvmalloc_node+0x80/0x140 mm/util.c:619
kvmalloc include/linux/mm.h:805 [inline]
kvzalloc include/linux/mm.h:813 [inline]
proc_sys_call_handler+0x3d0/0x8a0 fs/proc/proc_sysctl.c:570
call_write_iter include/linux/fs.h:2148 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacf/0xe50 fs/read_write.c:594
ksys_write+0x1a2/0x2c0 fs/read_write.c:647
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
Memory state around the buggy address:
ffff88807a31ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807a31ba80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807a31bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807a31bb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807a31bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: e8 e9 26 1d 00 call 0x1d26ee
5: 49 8b 1e mov (%r14),%rbx
8: 48 b8 00 00 00 00 00 movabs $0x380000000000000,%rax
f: 00 80 03
12: 48 21 c3 and %rax,%rbx
15: 49 bf 00 00 00 00 00 movabs $0x200000000000000,%r15
1c: 00 00 02
1f: 4c 89 ff mov %r15,%rdi
22: 48 89 de mov %rbx,%rsi
25: e8 b4 6b d3 ff call 0xffd36bde
* 2a: 4c 39 fb cmp %r15,%rbx <-- trapping instruction
2d: 75 56 jne 0x85
2f: 4d 85 ed test %r13,%r13
32: 0f 84 72 02 00 00 je 0x2aa
38: e8 c1 67 d3 ff call 0xffd367fe
3d: 48 rex.W
3e: b8 .byte 0xb8