==================================================================
BUG: KASAN: use-after-free in tcp_probe_timer net/ipv4/tcp_timer.c:378 [inline]
BUG: KASAN: use-after-free in tcp_write_timer_handler net/ipv4/tcp_timer.c:624 [inline]
BUG: KASAN: use-after-free in tcp_write_timer_handler+0x998/0x9f0 net/ipv4/tcp_timer.c:594
Read of size 1 at addr ffff8880496107e5 by task syz-executor.1/12348
CPU: 0 PID: 12348 Comm: syz-executor.1 Not tainted 6.0.0-rc5-syzkaller-00089-g6879c2d3b960 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:317 [inline]
print_report.cold+0x2ba/0x6e9 mm/kasan/report.c:433
kasan_report+0xb1/0x1e0 mm/kasan/report.c:495
tcp_probe_timer net/ipv4/tcp_timer.c:378 [inline]
tcp_write_timer_handler net/ipv4/tcp_timer.c:624 [inline]
tcp_write_timer_handler+0x998/0x9f0 net/ipv4/tcp_timer.c:594
tcp_write_timer+0xa2/0x2b0 net/ipv4/tcp_timer.c:637
call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790
__run_timers kernel/time/timer.c:1768 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
__do_softirq+0x1d3/0x9c6 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__kasan_check_write+0x0/0x10 mm/kasan/shadow.c:37
Code: 05 00 80 00 00 48 89 fb 48 39 c7 0f 82 2b 2e 76 07 eb e1 cc cc cc cc cc cc cc 48 8b 0c 24 89 f6 31 d2 e9 b3 fa ff ff 0f 1f 00 <48> 8b 0c 24 89 f6 ba 01 00 00 00 e9 a0 fa ff ff 55 53 48 8b 07 48
RSP: 0018:ffffc90004ad73e8 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff9200095ae7f RCX: ffffffff815f1ea1
RDX: ffffed10043581bd RSI: 0000000000000004 RDI: ffffc90004ad7418
RBP: ffff888021ac0de0 R08: 0000000000000001 R09: ffff888021ac0de3
R10: ffffed10043581bc R11: 0000000000000000 R12: ffff888021ac0de8
R13: ffff888021ac0df0 R14: ffff888000000000 R15: ffffea0001757a00
instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:542 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
do_raw_spin_lock+0x120/0x2a0 kernel/locking/spinlock_debug.c:115
spin_lock include/linux/spinlock.h:349 [inline]
wp_page_copy+0x639/0x1b60 mm/memory.c:3147
do_wp_page+0x1d1/0x1910 mm/memory.c:3404
handle_pte_fault mm/memory.c:4929 [inline]
__handle_mm_fault+0x1813/0x39b0 mm/memory.c:5053
handle_mm_fault+0x1c8/0x780 mm/memory.c:5151
do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1397
handle_page_fault arch/x86/mm/fault.c:1488 [inline]
exc_page_fault+0x94/0x170 arch/x86/mm/fault.c:1544
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:166
Code: ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 a4 31 c0 0f 01 ca c3 89 ca eb 0a 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc90004ad78f8 EFLAGS: 00050206
RAX: 0000000000000001 RBX: 0000000000001000 RCX: 0000000000000e80
RDX: 0000000000001000 RSI: ffff88800f4e3180 RDI: 00000000202c5000
RBP: 00007fffffffe000 R08: 0000000000000000 R09: ffff88800f4e3fff
R10: ffffed1001e9c7ff R11: 0000000000000000 R12: 00000000202c4e80
R13: ffff88800f4e3000 R14: ffff88800f4e3000 R15: 0000000000000000
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
copyout lib/iov_iter.c:170 [inline]
copyout+0xf6/0x120 lib/iov_iter.c:164
_copy_to_iter+0x537/0x13c0 lib/iov_iter.c:524
copy_page_to_iter+0x35f/0xe40 lib/iov_iter.c:722
process_vm_rw_pages mm/process_vm_access.c:45 [inline]
process_vm_rw_single_vec mm/process_vm_access.c:117 [inline]
process_vm_rw_core.constprop.0+0x5c3/0x980 mm/process_vm_access.c:215
process_vm_rw+0x29c/0x300 mm/process_vm_access.c:283
__do_sys_process_vm_readv mm/process_vm_access.c:295 [inline]
__se_sys_process_vm_readv mm/process_vm_access.c:291 [inline]
__x64_sys_process_vm_readv+0xdf/0x1b0 mm/process_vm_access.c:291
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe2c0e89409
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe2bfdfe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000136
RAX: ffffffffffffffda RBX: 00007fe2c0f9bf80 RCX: 00007fe2c0e89409
RDX: 0000000000000002 RSI: 0000000020008400 RDI: 000000000000004c
RBP: 00007fe2c0ee4367 R08: 0000000000000286 R09: 0000000000000000
R10: 0000000020008640 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe5b92517f R14: 00007fe2bfdfe300 R15: 0000000000022000
The buggy address belongs to the physical page:
page:ffffea0001258400 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x49610
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 ffffea00016ec008 ffffea0001567f08 0000000000000000
raw: 0000000000000000 ffff888049610000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x342040(__GFP_IO|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 11823, tgid 11823 (rm), ts 649163497619, free_ts 690377247987
prep_new_page mm/page_alloc.c:2532 [inline]
get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283
__alloc_pages+0x1c7/0x510 mm/page_alloc.c:5515
__alloc_pages_node include/linux/gfp.h:243 [inline]
kmem_getpages mm/slab.c:1363 [inline]
cache_grow_begin+0x75/0x360 mm/slab.c:2569
cache_alloc_refill+0x27f/0x380 mm/slab.c:2942
____cache_alloc mm/slab.c:3018 [inline]
____cache_alloc mm/slab.c:3001 [inline]
__do_cache_alloc mm/slab.c:3246 [inline]
slab_alloc mm/slab.c:3287 [inline]
__do_kmalloc mm/slab.c:3684 [inline]
__kmalloc+0x3a1/0x4a0 mm/slab.c:3695
kmalloc include/linux/slab.h:605 [inline]
tomoyo_realpath_from_path+0xc3/0x620 security/tomoyo/realpath.c:254
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x21b/0x400 security/tomoyo/file.c:822
tomoyo_path_unlink+0x8e/0xd0 security/tomoyo/tomoyo.c:149
security_path_unlink+0xd7/0x150 security/security.c:1173
do_unlinkat+0x363/0x650 fs/namei.c:4293
__do_sys_unlink fs/namei.c:4345 [inline]
__se_sys_unlink fs/namei.c:4343 [inline]
__x64_sys_unlink+0xc6/0x110 fs/namei.c:4343
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
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:1449 [inline]
free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499
free_unref_page_prepare mm/page_alloc.c:3380 [inline]
free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476
slab_destroy mm/slab.c:1615 [inline]
slabs_destroy+0x89/0xc0 mm/slab.c:1635
cache_flusharray mm/slab.c:3389 [inline]
___cache_free+0x2a8/0x3d0 mm/slab.c:3452
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x4f/0x1b0 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x97/0xb0 mm/kasan/common.c:447
kasan_slab_alloc include/linux/kasan.h:224 [inline]
slab_post_alloc_hook mm/slab.h:727 [inline]
slab_alloc mm/slab.c:3294 [inline]
__kmem_cache_alloc_lru mm/slab.c:3471 [inline]
kmem_cache_alloc+0x214/0x520 mm/slab.c:3491
kmem_cache_zalloc include/linux/slab.h:723 [inline]
jbd2_alloc_handle include/linux/jbd2.h:1596 [inline]
new_handle fs/jbd2/transaction.c:476 [inline]
jbd2__journal_start+0x18c/0x910 fs/jbd2/transaction.c:503
__ext4_journal_start_sb+0x3a3/0x490 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_dirty_inode+0x9d/0x110 fs/ext4/inode.c:5963
__mark_inode_dirty+0x48b/0x1040 fs/fs-writeback.c:2381
generic_update_time fs/inode.c:1860 [inline]
inode_update_time fs/inode.c:1873 [inline]
touch_atime+0x63d/0x700 fs/inode.c:1945
file_accessed include/linux/fs.h:2516 [inline]
filemap_read+0xc0c/0xe10 mm/filemap.c:2728
generic_file_read_iter+0x3b0/0x5a0 mm/filemap.c:2806
ext4_file_read_iter+0x1d5/0x600 fs/ext4/file.c:132
Memory state around the buggy address:
ffff888049610680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff888049610700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888049610780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff888049610800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff888049610880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
----------------
Code disassembly (best guess):
0: 05 00 80 00 00 add $0x8000,%eax
5: 48 89 fb mov %rdi,%rbx
8: 48 39 c7 cmp %rax,%rdi
b: 0f 82 2b 2e 76 07 jb 0x7762e3c
11: eb e1 jmp 0xfffffff4
13: cc int3
14: cc int3
15: cc int3
16: cc int3
17: cc int3
18: cc int3
19: cc int3
1a: 48 8b 0c 24 mov (%rsp),%rcx
1e: 89 f6 mov %esi,%esi
20: 31 d2 xor %edx,%edx
22: e9 b3 fa ff ff jmpq 0xfffffada
27: 0f 1f 00 nopl (%rax)
* 2a: 48 8b 0c 24 mov (%rsp),%rcx <-- trapping instruction
2e: 89 f6 mov %esi,%esi
30: ba 01 00 00 00 mov $0x1,%edx
35: e9 a0 fa ff ff jmpq 0xfffffada
3a: 55 push %rbp
3b: 53 push %rbx
3c: 48 8b 07 mov (%rdi),%rax
3f: 48 rex.W