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KASAN: use-after-free Read in consume_skb

Status: upstream: reported C repro on 2023/09/21 02:29
Bug presence: origin:lts
[Documentation on labels]
Reported-by: syzbot+22ecd09eeab6f3b89d76@syzkaller.appspotmail.com
First crash: 427d, last: 1d13h
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2023/09/21 lts (merge base) aff03380bda4 C [report] KASAN: use-after-free Read in consume_skb
2023/09/21 upstream (ToT) 42dc814987c1 C Didn't crash
▶ ▼ Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-1 KASAN: use-after-free Read in consume_skb C error done 4 379d 438d 0/2 auto-obsoleted due to no activity on 2024/02/15 15:09
linux-5.15 KASAN: use-after-free Read in consume_skb origin:lts-only C error 3 83d 104d 0/3 upstream: reported C repro on 2024/08/09 08:33
upstream KASAN: use-after-free Read in consume_skb bpf net C done inconclusive 33 858d 1138d 0/28 closed as invalid on 2022/10/12 18:37
upstream KASAN: slab-use-after-free Read in consume_skb net bpf C error 6 442d 443d 0/28 closed as invalid on 2023/10/04 10:50
▶ ▼ Last patch testing requests (7)
Created Duration User Patch Repo Result
2024/09/06 20:36 13m retest repro android13-5.15-lts report log
2024/09/06 20:36 13m retest repro android13-5.15-lts report log
2024/09/06 20:36 13m retest repro android13-5.15-lts report log
2024/09/06 20:36 11m retest repro android13-5.15-lts report log
2024/08/23 19:48 13m retest repro android13-5.15-lts report log
2024/08/23 19:48 8m retest repro android13-5.15-lts report log
2024/06/22 08:06 6m retest repro android13-5.15-lts report log
▶ ▼ Fix bisection attempts (2)
Created Duration User Patch Repo Result
2023/12/12 21:16 54m bisect fix android13-5.15-lts OK (0) job log log
2023/11/12 13:30 38m bisect fix android13-5.15-lts OK (0) job log log

Sample crash report:
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fae16d03ad9
RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000004
RBP: 0000000000000001 R08: 00007fff77c074b7 R09: 00000000000000a0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:71 [inline]
BUG: KASAN: use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
BUG: KASAN: use-after-free in refcount_read include/linux/refcount.h:147 [inline]
BUG: KASAN: use-after-free in skb_unref include/linux/skbuff.h:1131 [inline]
BUG: KASAN: use-after-free in consume_skb+0x3c/0x250 net/core/skbuff.c:926
Read of size 4 at addr ffff88811227feac by task syz-executor696/295

CPU: 1 PID: 295 Comm: syz-executor696 Not tainted 5.15.167-syzkaller-00348-g2e66050fb753 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106
 print_address_description+0x87/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:444
 kasan_check_range+0x293/0x2a0 mm/kasan/generic.c:189
 __kasan_check_read+0x11/0x20 mm/kasan/shadow.c:31
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
 refcount_read include/linux/refcount.h:147 [inline]
 skb_unref include/linux/skbuff.h:1131 [inline]
 consume_skb+0x3c/0x250 net/core/skbuff.c:926
 __sk_msg_free+0x2dd/0x370 net/core/skmsg.c:205
 sk_msg_free net/core/skmsg.c:218 [inline]
 __sk_psock_purge_ingress_msg net/core/skmsg.c:769 [inline]
 __sk_psock_zap_ingress net/core/skmsg.c:787 [inline]
 sk_psock_stop+0x44c/0x4d0 net/core/skmsg.c:805
 sk_psock_drop+0x219/0x310 net/core/skmsg.c:844
 sk_psock_put include/linux/skmsg.h:458 [inline]
 sock_map_unref+0x48f/0x4d0 net/core/sock_map.c:183
 __sock_map_delete net/core/sock_map.c:425 [inline]
 sock_map_delete_from_link net/core/sock_map.c:438 [inline]
 sock_map_unlink net/core/sock_map.c:1497 [inline]
 sock_map_remove_links+0x41c/0x650 net/core/sock_map.c:1512
 sock_map_close+0x114/0x530 net/core/sock_map.c:1549
 unix_release+0x82/0xc0 net/unix/af_unix.c:936
 __sock_release net/socket.c:649 [inline]
 sock_close+0xdf/0x270 net/socket.c:1336
 __fput+0x228/0x8c0 fs/file_table.c:280
 ____fput+0x15/0x20 fs/file_table.c:308
 task_work_run+0x129/0x190 kernel/task_work.c:188
 ptrace_notify+0x29e/0x350 kernel/signal.c:2388
 ptrace_report_syscall include/linux/tracehook.h:66 [inline]
 tracehook_report_syscall_exit include/linux/tracehook.h:130 [inline]
 arch_syscall_exit_tracehook include/linux/entry-common.h:297 [inline]
 syscall_exit_work kernel/entry/common.c:262 [inline]
 syscall_exit_to_user_mode_prepare kernel/entry/common.c:289 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:294 [inline]
 syscall_exit_to_user_mode+0xa3/0x160 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fae16d02e10
Code: ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 80 3d 91 12 07 00 00 74 17 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c
RSP: 002b:00007fff77c07718 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fae16d02e10
RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007fff77c074b7 R09: 00000000000000a0
R10: 0000000000000001 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Allocated by task 295:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:433 [inline]
 __kasan_slab_alloc+0xb1/0xe0 mm/kasan/common.c:466
 kasan_slab_alloc include/linux/kasan.h:217 [inline]
 slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550
 slab_alloc_node mm/slub.c:3240 [inline]
 slab_alloc mm/slub.c:3248 [inline]
 kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253
 skb_clone+0x1d1/0x360 net/core/skbuff.c:1547
 sk_psock_verdict_recv+0x53/0x840 net/core/skmsg.c:1183
 unix_read_sock+0x132/0x370 net/unix/af_unix.c:2428
 sk_psock_verdict_data_ready+0x147/0x1a0 net/core/skmsg.c:1226
 unix_dgram_sendmsg+0x15fa/0x2090 net/unix/af_unix.c:1942
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2431
 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2485
 __sys_sendmsg net/socket.c:2514 [inline]
 __do_sys_sendmsg net/socket.c:2523 [inline]
 __se_sys_sendmsg+0x19a/0x260 net/socket.c:2521
 __x64_sys_sendmsg+0x7b/0x90 net/socket.c:2521
 x64_sys_call+0x16a/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

Freed by task 20:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1723 [inline]
 slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749
 slab_free mm/slub.c:3519 [inline]
 kmem_cache_free+0x116/0x2e0 mm/slub.c:3535
 kfree_skbmem+0x104/0x170
 __kfree_skb net/core/skbuff.c:758 [inline]
 kfree_skb_reason net/core/skbuff.c:778 [inline]
 kfree_skb+0xc2/0x360 net/core/skbuff.c:792
 sock_drop include/linux/skmsg.h:312 [inline]
 sk_psock_backlog+0xc21/0xd90 net/core/skmsg.c:682
 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

The buggy address belongs to the object at ffff88811227fdc0
 which belongs to the cache skbuff_head_cache of size 248
The buggy address is located 236 bytes inside of
 248-byte region [ffff88811227fdc0, ffff88811227feb8)
The buggy address belongs to the page:
page:ffffea0004489fc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11227f
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff8881081b2a80
raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 289, ts 24054518389, free_ts 18740556165
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2611
 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485
 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5779
 allocate_slab mm/slub.c:1932 [inline]
 new_slab+0x9a/0x4e0 mm/slub.c:1995
 ___slab_alloc+0x39e/0x830 mm/slub.c:3028
 __slab_alloc+0x4a/0x90 mm/slub.c:3115
 slab_alloc_node mm/slub.c:3206 [inline]
 slab_alloc mm/slub.c:3248 [inline]
 kmem_cache_alloc+0x134/0x200 mm/slub.c:3253
 skb_clone+0x1d1/0x360 net/core/skbuff.c:1547
 dev_queue_xmit_nit+0x25b/0xa40 net/core/dev.c:2318
 xmit_one net/core/dev.c:3620 [inline]
 dev_hard_start_xmit+0x149/0x620 net/core/dev.c:3641
 sch_direct_xmit+0x298/0x9b0 net/sched/sch_generic.c:342
 __dev_xmit_skb net/core/dev.c:3852 [inline]
 __dev_queue_xmit+0x161e/0x2e70 net/core/dev.c:4221
 dev_queue_xmit+0x17/0x20 net/core/dev.c:4289
 neigh_hh_output include/net/neighbour.h:501 [inline]
 neigh_output include/net/neighbour.h:515 [inline]
 ip_finish_output2+0xb9f/0xf60 net/ipv4/ip_output.c:228
 __ip_finish_output+0x162/0x360
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1472 [inline]
 free_pcp_prepare mm/page_alloc.c:1544 [inline]
 free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3534
 free_unref_page+0xe8/0x750 mm/page_alloc.c:3616
 free_the_page mm/page_alloc.c:805 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5855
 __vunmap+0x7bc/0x8f0 mm/vmalloc.c:2652
 free_work+0x5b/0x80 mm/vmalloc.c:96
 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

Memory state around the buggy address:
 ffff88811227fd80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff88811227fe00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811227fe80: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc
                                  ^
 ffff88811227ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88811227ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: double-free or invalid-free in slab_free mm/slub.c:3519 [inline]
BUG: KASAN: double-free or invalid-free in kmem_cache_free+0x116/0x2e0 mm/slub.c:3535

CPU: 1 PID: 295 Comm: syz-executor696 Tainted: G    B             5.15.167-syzkaller-00348-g2e66050fb753 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106
 print_address_description+0x87/0x3b0 mm/kasan/report.c:248
 kasan_report_invalid_free+0x6b/0xa0 mm/kasan/report.c:370
 ____kasan_slab_free+0x13e/0x160
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1723 [inline]
 slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749
 slab_free mm/slub.c:3519 [inline]
 kmem_cache_free+0x116/0x2e0 mm/slub.c:3535
 kfree_skbmem+0x104/0x170
 __kfree_skb net/core/skbuff.c:758 [inline]
 consume_skb+0xb4/0x250 net/core/skbuff.c:930
 __sk_msg_free+0x2dd/0x370 net/core/skmsg.c:205
 sk_msg_free net/core/skmsg.c:218 [inline]
 __sk_psock_purge_ingress_msg net/core/skmsg.c:769 [inline]
 __sk_psock_zap_ingress net/core/skmsg.c:787 [inline]
 sk_psock_stop+0x44c/0x4d0 net/core/skmsg.c:805
 sk_psock_drop+0x219/0x310 net/core/skmsg.c:844
 sk_psock_put include/linux/skmsg.h:458 [inline]
 sock_map_unref+0x48f/0x4d0 net/core/sock_map.c:183
 __sock_map_delete net/core/sock_map.c:425 [inline]
 sock_map_delete_from_link net/core/sock_map.c:438 [inline]
 sock_map_unlink net/core/sock_map.c:1497 [inline]
 sock_map_remove_links+0x41c/0x650 net/core/sock_map.c:1512
 sock_map_close+0x114/0x530 net/core/sock_map.c:1549
 unix_release+0x82/0xc0 net/unix/af_unix.c:936
 __sock_release net/socket.c:649 [inline]
 sock_close+0xdf/0x270 net/socket.c:1336
 __fput+0x228/0x8c0 fs/file_table.c:280
 ____fput+0x15/0x20 fs/file_table.c:308
 task_work_run+0x129/0x190 kernel/task_work.c:188
 ptrace_notify+0x29e/0x350 kernel/signal.c:2388
 ptrace_report_syscall include/linux/tracehook.h:66 [inline]
 tracehook_report_syscall_exit include/linux/tracehook.h:130 [inline]
 arch_syscall_exit_tracehook include/linux/entry-common.h:297 [inline]
 syscall_exit_work kernel/entry/common.c:262 [inline]
 syscall_exit_to_user_mode_prepare kernel/entry/common.c:289 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:294 [inline]
 syscall_exit_to_user_mode+0xa3/0x160 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fae16d02e10
Code: ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 80 3d 91 12 07 00 00 74 17 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c
RSP: 002b:00007fff77c07718 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fae16d02e10
RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007fff77c074b7 R09: 00000000000000a0
R10: 0000000000000001 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Allocated by task 295:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:433 [inline]
 __kasan_slab_alloc+0xb1/0xe0 mm/kasan/common.c:466
 kasan_slab_alloc include/linux/kasan.h:217 [inline]
 slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550
 slab_alloc_node mm/slub.c:3240 [inline]
 slab_alloc mm/slub.c:3248 [inline]
 kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253
 skb_clone+0x1d1/0x360 net/core/skbuff.c:1547
 sk_psock_verdict_recv+0x53/0x840 net/core/skmsg.c:1183
 unix_read_sock+0x132/0x370 net/unix/af_unix.c:2428
 sk_psock_verdict_data_ready+0x147/0x1a0 net/core/skmsg.c:1226
 unix_dgram_sendmsg+0x15fa/0x2090 net/unix/af_unix.c:1942
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2431
 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2485
 __sys_sendmsg net/socket.c:2514 [inline]
 __do_sys_sendmsg net/socket.c:2523 [inline]
 __se_sys_sendmsg+0x19a/0x260 net/socket.c:2521
 __x64_sys_sendmsg+0x7b/0x90 net/socket.c:2521
 x64_sys_call+0x16a/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

Freed by task 20:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1723 [inline]
 slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749
 slab_free mm/slub.c:3519 [inline]
 kmem_cache_free+0x116/0x2e0 mm/slub.c:3535
 kfree_skbmem+0x104/0x170
 __kfree_skb net/core/skbuff.c:758 [inline]
 kfree_skb_reason net/core/skbuff.c:778 [inline]
 kfree_skb+0xc2/0x360 net/core/skbuff.c:792
 sock_drop include/linux/skmsg.h:312 [inline]
 sk_psock_backlog+0xc21/0xd90 net/core/skmsg.c:682
 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

The buggy address belongs to the object at ffff88811227fdc0
 which belongs to the cache skbuff_head_cache of size 248
The buggy address is located 0 bytes inside of
 248-byte region [ffff88811227fdc0, ffff88811227feb8)
The buggy address belongs to the page:
page:ffffea0004489fc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11227f
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff8881081b2a80
raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 289, ts 24054518389, free_ts 18740556165
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2611
 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485
 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5779
 allocate_slab mm/slub.c:1932 [inline]
 new_slab+0x9a/0x4e0 mm/slub.c:1995
 ___slab_alloc+0x39e/0x830 mm/slub.c:3028
 __slab_alloc+0x4a/0x90 mm/slub.c:3115
 slab_alloc_node mm/slub.c:3206 [inline]
 slab_alloc mm/slub.c:3248 [inline]
 kmem_cache_alloc+0x134/0x200 mm/slub.c:3253
 skb_clone+0x1d1/0x360 net/core/skbuff.c:1547
 dev_queue_xmit_nit+0x25b/0xa40 net/core/dev.c:2318
 xmit_one net/core/dev.c:3620 [inline]
 dev_hard_start_xmit+0x149/0x620 net/core/dev.c:3641
 sch_direct_xmit+0x298/0x9b0 net/sched/sch_generic.c:342
 __dev_xmit_skb net/core/dev.c:3852 [inline]
 __dev_queue_xmit+0x161e/0x2e70 net/core/dev.c:4221
 dev_queue_xmit+0x17/0x20 net/core/dev.c:4289
 neigh_hh_output include/net/neighbour.h:501 [inline]
 neigh_output include/net/neighbour.h:515 [inline]
 ip_finish_output2+0xb9f/0xf60 net/ipv4/ip_output.c:228
 __ip_finish_output+0x162/0x360
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1472 [inline]
 free_pcp_prepare mm/page_alloc.c:1544 [inline]
 free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3534
 free_unref_page+0xe8/0x750 mm/page_alloc.c:3616
 free_the_page mm/page_alloc.c:805 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5855
 __vunmap+0x7bc/0x8f0 mm/vmalloc.c:2652
 free_work+0x5b/0x80 mm/vmalloc.c:96
 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

Memory state around the buggy address:
 ffff88811227fc80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811227fd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc
>ffff88811227fd80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
                                           ^
 ffff88811227fe00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811227fe8

Crashes (38):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/20 01:04 android13-5.15-lts 2e66050fb753 7d02db5a .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/08/09 19:44 android13-5.15-lts 70e1a731d986 a83d9288 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/04/28 16:00 android13-5.15-lts 5d96939590c0 07b455f9 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/01/19 05:05 android13-5.15-lts 1c3a1f32bcbd 21772ce4 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 KASAN: use-after-free Read in consume_skb
2023/09/25 17:24 android13-5.15-lts ea586874d2f9 0b6a67ac .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 KASAN: use-after-free Read in consume_skb
2023/09/21 03:10 android13-5.15-lts ea586874d2f9 0b6a67ac .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 KASAN: use-after-free Read in consume_skb
2023/09/21 02:28 android13-5.15-lts ea586874d2f9 0b6a67ac .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 KASAN: use-after-free Read in consume_skb
2024/11/20 00:29 android13-5.15-lts 2e66050fb753 7d02db5a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/11/17 16:07 android13-5.15-lts ef332e923197 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/11/17 03:53 android13-5.15-lts 42bb395d8907 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/11/15 14:45 android13-5.15-lts 3bfe08931bff f6ede3a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/11/12 07:07 android13-5.15-lts 3bfe08931bff 75bb1b32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/11/03 10:44 android13-5.15-lts 5e4635681cf1 f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 KASAN: use-after-free Read in consume_skb
2024/10/23 13:55 android13-5.15-lts 5e4635681cf1 15fa2979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/10/20 14:47 android13-5.15-lts 5e4635681cf1 cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 KASAN: use-after-free Read in consume_skb
2024/10/15 05:16 android13-5.15-lts 5e4635681cf1 b01b6661 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/10/08 12:28 android13-5.15-lts 80dd36dca275 402f1df0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/09/18 11:49 android13-5.15-lts b92c0d35d015 c673ca06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 KASAN: use-after-free Read in consume_skb
2024/09/16 18:59 android13-5.15-lts b92c0d35d015 c673ca06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/08/09 19:14 android13-5.15-lts 70e1a731d986 a83d9288 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/07/31 13:43 android13-5.15-lts d0a6506ecafd 6fde257d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/07/27 07:12 android13-5.15-lts 4edafe6c0231 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/07/27 05:01 android13-5.15-lts 4edafe6c0231 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/07/25 03:16 android13-5.15-lts 5356d2f17edf d1a1b0ca .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/07/25 03:09 android13-5.15-lts 5356d2f17edf d1a1b0ca .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/07/25 03:08 android13-5.15-lts 5356d2f17edf d1a1b0ca .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/07/23 03:31 android13-5.15-lts 5356d2f17edf 708c10c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/07/17 10:25 android13-5.15-lts db06c48ab67e 215bec2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/07/14 06:35 android13-5.15-lts db06c48ab67e eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 KASAN: use-after-free Read in consume_skb
2024/05/05 19:43 android13-5.15-lts 5d96939590c0 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/04/29 02:06 android13-5.15-lts 5d96939590c0 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/04/28 10:44 android13-5.15-lts 5d96939590c0 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/04/20 17:36 android13-5.15-lts ad06eaf051cd af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/04/20 09:25 android13-5.15-lts ad06eaf051cd af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/04/19 14:55 android13-5.15-lts ad06eaf051cd af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/04/19 14:39 android13-5.15-lts ad06eaf051cd af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf KASAN: use-after-free Read in consume_skb
2024/03/06 06:40 android13-5.15-lts 993bed180178 f39a7eed .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 KASAN: use-after-free Read in consume_skb
2024/01/19 04:43 android13-5.15-lts 1c3a1f32bcbd 21772ce4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 KASAN: use-after-free Read in consume_skb
* Struck through repros no longer work on HEAD.