==================================================================
BUG: KASAN: use-after-free in tcp_probe_timer net/ipv4/tcp_timer.c:388 [inline]
BUG: KASAN: use-after-free in tcp_write_timer_handler+0x7ef/0x930 net/ipv4/tcp_timer.c:652
Read of size 1 at addr ffff8880741b0745 by task syz-executor.3/9988
CPU: 1 PID: 9988 Comm: syz-executor.3 Not tainted 6.1.79-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x15f/0x4f0 mm/kasan/report.c:395
kasan_report+0x136/0x160 mm/kasan/report.c:495
tcp_probe_timer net/ipv4/tcp_timer.c:388 [inline]
tcp_write_timer_handler+0x7ef/0x930 net/ipv4/tcp_timer.c:652
tcp_write_timer+0x12e/0x280 net/ipv4/tcp_timer.c:665
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1790
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__list_add_valid+0x2/0xe0 lib/list_debug.c:22
Code: f7 e8 32 6e a5 fd e9 73 ff ff ff e8 58 fd 4d fd 0f 0b e8 51 fd 4d fd 0f 0b e8 aa 16 4e 06 cc cc cc cc cc cc cc cc cc cc 41 57 <41> 56 41 55 41 54 53 48 85 f6 0f 84 8a 00 00 00 49 89 d6 48 85 d2
RSP: 0018:ffffc9000337f430 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff88807f08c418 RCX: dffffc0000000000
RDX: ffff888073571f08 RSI: ffff88807f08c418 RDI: ffff8880307b8af8
RBP: ffffc9000337f590 R08: dffffc0000000000 R09: ffffed1002577b40
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100fe1180c
R13: ffff888073571f08 R14: ffff88807f08c060 R15: 1ffff1100fe11883
__list_add include/linux/list.h:69 [inline]
list_add include/linux/list.h:88 [inline]
ext4_orphan_add+0xc3d/0x1210 fs/ext4/orphan.c:163
ext4_truncate+0x96f/0x1290 fs/ext4/inode.c:4268
ext4_setattr+0x10f5/0x1a00 fs/ext4/inode.c:5584
notify_change+0xce3/0xfc0 fs/attr.c:499
do_truncate+0x21c/0x300 fs/open.c:65
handle_truncate fs/namei.c:3287 [inline]
do_open fs/namei.c:3632 [inline]
path_openat+0x27e2/0x2e60 fs/namei.c:3785
do_filp_open+0x230/0x480 fs/namei.c:3812
do_sys_openat2+0x13b/0x500 fs/open.c:1318
do_sys_open fs/open.c:1334 [inline]
__do_sys_openat fs/open.c:1350 [inline]
__se_sys_openat fs/open.c:1345 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1345
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fcba267dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fcba337b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fcba27abf80 RCX: 00007fcba267dda9
RDX: 0000000000007a05 RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007fcba26ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001700 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fcba27abf80 R15: 00007ffd27c93b58
Allocated by task 3585:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422
kmem_cache_zalloc include/linux/slab.h:682 [inline]
net_alloc net/core/net_namespace.c:410 [inline]
copy_net_ns+0x143/0x5d0 net/core/net_namespace.c:465
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:3203
__do_sys_unshare kernel/fork.c:3274 [inline]
__se_sys_unshare kernel/fork.c:3272 [inline]
__x64_sys_unshare+0x34/0x40 kernel/fork.c:3272
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486
insert_work+0x54/0x3d0 kernel/workqueue.c:1361
__queue_work+0xb4b/0xf90 kernel/workqueue.c:1520
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1514 [inline]
__run_timers+0x6a8/0x890 kernel/time/timer.c:1790
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
Second to last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486
insert_work+0x54/0x3d0 kernel/workqueue.c:1361
__queue_work+0xb4b/0xf90 kernel/workqueue.c:1520
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1514 [inline]
__run_timers+0x6a8/0x890 kernel/time/timer.c:1790
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
The buggy address belongs to the object at ffff8880741b0000
which belongs to the cache net_namespace of size 6976
The buggy address is located 1861 bytes inside of
6976-byte region [ffff8880741b0000, ffff8880741b1b40)
The buggy address belongs to the physical page:
page:ffffea0001d06c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880741b0000 pfn:0x741b0
head:ffffea0001d06c00 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff88802bbd6381
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000001 ffff888140009500
raw: ffff8880741b0000 0000000080040001 00000001ffffffff ffff88802bbd6381
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 3585, tgid 3585 (syz-executor.3), ts 110161703563, free_ts 107455432452
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513
prep_new_page mm/page_alloc.c:2520 [inline]
get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279
__alloc_pages+0x28d/0x770 mm/page_alloc.c:5545
alloc_slab_page+0x6a/0x150 mm/slub.c:1794
allocate_slab mm/slub.c:1939 [inline]
new_slab+0x84/0x2d0 mm/slub.c:1992
___slab_alloc+0xc20/0x1270 mm/slub.c:3180
__slab_alloc mm/slub.c:3279 [inline]
slab_alloc_node mm/slub.c:3364 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x1a5/0x2d0 mm/slub.c:3422
kmem_cache_zalloc include/linux/slab.h:682 [inline]
net_alloc net/core/net_namespace.c:410 [inline]
copy_net_ns+0x143/0x5d0 net/core/net_namespace.c:465
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:3203
__do_sys_unshare kernel/fork.c:3274 [inline]
__se_sys_unshare kernel/fork.c:3272 [inline]
__x64_sys_unshare+0x34/0x40 kernel/fork.c:3272
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1440 [inline]
free_pcp_prepare mm/page_alloc.c:1490 [inline]
free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3358
free_unref_page+0x33/0x3e0 mm/page_alloc.c:3453
free_slab mm/slub.c:2031 [inline]
discard_slab mm/slub.c:2037 [inline]
__unfreeze_partials+0x1b7/0x210 mm/slub.c:2586
put_cpu_partial+0x17b/0x250 mm/slub.c:2662
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422
mt_alloc_one lib/maple_tree.c:152 [inline]
mas_alloc_nodes+0x276/0x800 lib/maple_tree.c:1277
mas_node_count_gfp lib/maple_tree.c:1359 [inline]
mas_preallocate+0x12d/0x350 lib/maple_tree.c:5805
vma_expand+0x271/0x8f0 mm/mmap.c:544
mmap_region+0xc3f/0x1fa0 mm/mmap.c:2730
do_mmap+0x8c5/0xf60 mm/mmap.c:1425
vm_mmap_pgoff+0x1ca/0x2d0 mm/util.c:520
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
Memory state around the buggy address:
ffff8880741b0600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880741b0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880741b0700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880741b0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880741b0800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: f7 e8 imul %eax
2: 32 6e a5 xor -0x5b(%rsi),%ch
5: fd std
6: e9 73 ff ff ff jmp 0xffffff7e
b: e8 58 fd 4d fd call 0xfd4dfd68
10: 0f 0b ud2
12: e8 51 fd 4d fd call 0xfd4dfd68
17: 0f 0b ud2
19: e8 aa 16 4e 06 call 0x64e16c8
1e: cc int3
1f: cc int3
20: cc int3
21: cc int3
22: cc int3
23: cc int3
24: cc int3
25: cc int3
26: cc int3
27: cc int3
28: 41 57 push %r15
* 2a: 41 56 push %r14 <-- trapping instruction
2c: 41 55 push %r13
2e: 41 54 push %r12
30: 53 push %rbx
31: 48 85 f6 test %rsi,%rsi
34: 0f 84 8a 00 00 00 je 0xc4
3a: 49 89 d6 mov %rdx,%r14
3d: 48 85 d2 test %rdx,%rdx