ci2 starts bisection 2023-12-12 21:16:47.218066109 +0000 UTC m=+33487.252754925
bisecting fixing commit since ea586874d2f9e501ef84b7e55036fc8965397d5d
building syzkaller on 0b6a67ac4b0dc26f43030c5edd01c9175f13b784
ensuring issue is reproducible on original commit ea586874d2f9e501ef84b7e55036fc8965397d5d

testing commit ea586874d2f9e501ef84b7e55036fc8965397d5d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: ee9b2c6824279b80d8771119caea59a036a138422ebadb70c03b85afa5a10a38
all runs: crashed: KASAN: use-after-free Read in consume_skb
representative crash: KASAN: use-after-free Read in consume_skb, types: [KASAN]
check whether we can drop unnecessary instrumentation
disabling configs for [BUG LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed
testing commit ea586874d2f9e501ef84b7e55036fc8965397d5d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 5fc22cd48042345f61d35b3ab620f10c4fc873ddc9286e69d40485e4f27b07a8
all runs: crashed: KASAN: use-after-free Read in consume_skb
representative crash: KASAN: use-after-free Read in consume_skb, types: [KASAN]
the bug reproduces without the instrumentation
disabling configs for [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed
kconfig minimization: base=4920 full=6163 leaves diff=241
split chunks (needed=false): <241>
split chunk #0 of len 241 into 5 parts
testing without sub-chunk 1/5
disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed
testing commit ea586874d2f9e501ef84b7e55036fc8965397d5d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 41fba8d3b7c121fc60c804a6a027eb8d7e72a97385bdc6e95466d3a18ad5ce87
all runs: crashed: KASAN: use-after-free Read in consume_skb
representative crash: KASAN: use-after-free Read in consume_skb, types: [KASAN]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed
testing commit ea586874d2f9e501ef84b7e55036fc8965397d5d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: c962aad63edddb5eee6f26a56289b3c8855d0e3dd81b77756b1a19865e56e1d1
run #0: crashed: KASAN: use-after-free Read in consume_skb
run #1: crashed: KASAN: use-after-free Read in consume_skb
run #2: crashed: KASAN: use-after-free Read in consume_skb
run #3: crashed: KASAN: use-after-free Write in skb_release_data
run #4: crashed: KASAN: use-after-free Read in consume_skb
run #5: crashed: KASAN: use-after-free Read in consume_skb
run #6: crashed: KASAN: use-after-free Read in consume_skb
run #7: crashed: KASAN: use-after-free Read in consume_skb
run #8: crashed: KASAN: use-after-free Read in consume_skb
run #9: crashed: KASAN: use-after-free Read in consume_skb
representative crash: KASAN: use-after-free Read in consume_skb, types: [KASAN]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed
testing commit ea586874d2f9e501ef84b7e55036fc8965397d5d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 4aa95f133af9ad489f712a2aa00fdbbf0b5e23e610efff1b4c302d298bc70322
all runs: crashed: KASAN: use-after-free Read in consume_skb
representative crash: KASAN: use-after-free Read in consume_skb, types: [KASAN]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [BUG LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed
testing commit ea586874d2f9e501ef84b7e55036fc8965397d5d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 2a40d4da6f0ca854ba503e1f2ede333b7cf48e679d6c2bee8e16000bd72985bd
all runs: crashed: KASAN: use-after-free Read in consume_skb
representative crash: KASAN: use-after-free Read in consume_skb, types: [KASAN]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG], they are not needed
testing commit ea586874d2f9e501ef84b7e55036fc8965397d5d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
failed building ea586874d2f9e501ef84b7e55036fc8965397d5d: net/socket.c:1172: undefined reference to `wext_handle_ioctl'
net/socket.c:3366: undefined reference to `compat_wext_handle_ioctl'
net/core/net-procfs.c:343: undefined reference to `wext_proc_exit'
net/core/net-procfs.c:327: undefined reference to `wext_proc_init'
minimized to 45 configs; suspects: [HID_ZEROPLUS USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD USB_OHCI_HCD_PCI USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_PRINTER USB_SERIAL USB_SERIAL_FTDI_SIO USB_SERIAL_GENERIC USB_SERIAL_PL2303 USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_TRANCEVIBRATOR USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_WDM WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_ZYDAS X86_X32 ZEROPLUS_FF]
disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed
testing current HEAD 05ef4ccb57746f921003b9340fc2f0532c177f41
testing commit 05ef4ccb57746f921003b9340fc2f0532c177f41 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 7cd94e6b8d0ca1ea610b2470666d1152a7b0bfa84e75c616a4ddbf035eaa828e
all runs: crashed: KASAN: use-after-free Read in consume_skb
representative crash: KASAN: use-after-free Read in consume_skb, types: [KASAN]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 54m40.028304615s (build: 33m15.212739752s, test: 19m38.021046859s)
crash still not fixed or there were kernel test errors
commit msg: Revert "ipvlan: properly track tx_errors"
crash: KASAN: use-after-free Read in consume_skb
==================================================================
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+0x28/0x1d0 net/core/skbuff.c:926
Read of size 4 at addr ffff888123354ae4 by task syz-executor.0/350

CPU: 1 PID: 350 Comm: syz-executor.0 Not tainted 5.15.139-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x38/0x49 lib/dump_stack.c:106
 print_address_description.constprop.0+0x24/0x160 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report.cold+0x82/0xdb mm/kasan/report.c:444
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0x148/0x190 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+0x28/0x1d0 net/core/skbuff.c:926
 __sk_msg_free+0x267/0x4e0 net/core/skmsg.c:205
 sk_msg_free net/core/skmsg.c:218 [inline]
 __sk_psock_purge_ingress_msg net/core/skmsg.c:768 [inline]
 __sk_psock_zap_ingress net/core/skmsg.c:786 [inline]
 sk_psock_stop+0x3e4/0x600 net/core/skmsg.c:804
 sock_map_close+0x253/0x310 net/core/sock_map.c:1548
 unix_release+0x73/0xe0 net/unix/af_unix.c:949
 __sock_release+0xc2/0x270 net/socket.c:649
 sock_close+0x10/0x20 net/socket.c:1334
 __fput+0x317/0x960 fs/file_table.c:280
 ____fput+0x9/0x10 fs/file_table.c:308
 task_work_run+0xc2/0x150 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x140/0x150 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x21/0x40 kernel/entry/common.c:301
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f31b5b259da
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24
RSP: 002b:00007ffdbe193520 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f31b5b259da
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f31b5c47980 R08: 0000001b31460000 R09: 00007ffdbe1d4080
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000a752
R13: ffffffffffffffff R14: 00007f31b56aa000 R15: 000000000000a411
 </TASK>

Allocated by task 351:
 kasan_save_stack+0x26/0x50 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:433 [inline]
 __kasan_slab_alloc+0x94/0xc0 mm/kasan/common.c:466
 kasan_slab_alloc include/linux/kasan.h:217 [inline]
 slab_post_alloc_hook mm/slab.h:550 [inline]
 slab_alloc_node mm/slub.c:3240 [inline]
 slab_alloc mm/slub.c:3248 [inline]
 kmem_cache_alloc+0x197/0x480 mm/slub.c:3253
 skb_clone+0x131/0x310 net/core/skbuff.c:1547
 sk_psock_verdict_recv+0x4a/0x9e0 net/core/skmsg.c:1182
 unix_read_sock+0xd8/0x200 net/unix/af_unix.c:2433
 sk_psock_verdict_data_ready+0x104/0x170 net/core/skmsg.c:1225
 unix_dgram_sendmsg+0xc13/0x16d0 net/unix/af_unix.c:1949
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg+0xb5/0xf0 net/socket.c:716
 ____sys_sendmsg+0x3f3/0x990 net/socket.c:2429
 ___sys_sendmsg+0xfc/0x190 net/socket.c:2483
 __sys_sendmmsg+0x160/0x340 net/socket.c:2569
 __do_sys_sendmmsg net/socket.c:2598 [inline]
 __se_sys_sendmmsg net/socket.c:2595 [inline]
 __x64_sys_sendmmsg+0x98/0xf0 net/socket.c:2595
 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+0x61/0xcb

Freed by task 25:
 kasan_save_stack+0x26/0x50 mm/kasan/common.c:38
 kasan_set_track+0x25/0x30 mm/kasan/common.c:45
 kasan_set_free_info+0x24/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:365 [inline]
 ____kasan_slab_free mm/kasan/common.c:327 [inline]
 __kasan_slab_free+0x111/0x150 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+0x94/0x1a0 mm/slub.c:1749
 slab_free mm/slub.c:3519 [inline]
 kmem_cache_free+0x105/0x250 mm/slub.c:3535
 kfree_skbmem+0x95/0x140 net/core/skbuff.c:701
 __kfree_skb net/core/skbuff.c:758 [inline]
 kfree_skb_reason net/core/skbuff.c:778 [inline]
 kfree_skb_reason+0xbb/0x2b0 net/core/skbuff.c:771
 kfree_skb+0xb/0x10 net/core/skbuff.c:792
 sock_drop include/linux/skmsg.h:312 [inline]
 sk_psock_backlog+0x694/0xd00 net/core/skmsg.c:681
 process_one_work+0x62c/0xec0 kernel/workqueue.c:2317
 worker_thread+0x48e/0xdb0 kernel/workqueue.c:2464
 kthread+0x324/0x3e0 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff888123354a00
 which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 228 bytes inside of
 240-byte region [ffff888123354a00, ffff888123354af0)
The buggy address belongs to the page:
page:ffffea00048cd500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x123354
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff8881002fb080
raw: 0000000000000000 00000000000c000c 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 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 37, ts 42039982546, free_ts 42021057563
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook mm/page_alloc.c:2604 [inline]
 prep_new_page+0x1a2/0x310 mm/page_alloc.c:2610
 get_page_from_freelist+0x1ce2/0x30a0 mm/page_alloc.c:4484
 __alloc_pages+0x23f/0x2400 mm/page_alloc.c:5776
 __alloc_pages_node include/linux/gfp.h:591 [inline]
 alloc_pages_node include/linux/gfp.h:605 [inline]
 alloc_pages include/linux/gfp.h:618 [inline]
 alloc_slab_page mm/slub.c:1793 [inline]
 allocate_slab+0x39d/0x530 mm/slub.c:1932
 new_slab mm/slub.c:1995 [inline]
 ___slab_alloc.constprop.0+0x3ca/0x890 mm/slub.c:3028
 __slab_alloc.constprop.0+0x42/0x80 mm/slub.c:3115
 slab_alloc_node mm/slub.c:3206 [inline]
 slab_alloc mm/slub.c:3248 [inline]
 kmem_cache_alloc+0x440/0x480 mm/slub.c:3253
 kmem_cache_alloc_node include/linux/slab.h:474 [inline]
 __alloc_skb+0x14b/0x250 net/core/skbuff.c:416
 alloc_skb include/linux/skbuff.h:1183 [inline]
 ndisc_alloc_skb+0x135/0x320 net/ipv6/ndisc.c:421
 ndisc_send_ns+0x12f/0x7e0 net/ipv6/ndisc.c:627
 addrconf_dad_work+0x9e6/0x1100 net/ipv6/addrconf.c:4204
 process_one_work+0x62c/0xec0 kernel/workqueue.c:2317
 worker_thread+0x48e/0xdb0 kernel/workqueue.c:2464
 kthread+0x324/0x3e0 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1471 [inline]
 free_pcp_prepare+0x1b6/0x4c0 mm/page_alloc.c:1543
 free_unref_page_prepare mm/page_alloc.c:3533 [inline]
 free_unref_page+0x84/0x760 mm/page_alloc.c:3615
 free_the_page mm/page_alloc.c:804 [inline]
 __free_pages+0xd7/0xf0 mm/page_alloc.c:5852
 __vunmap+0x4b2/0x7b0 mm/vmalloc.c:2652
 __vfree+0x21/0x90 mm/vmalloc.c:2700
 vfree+0x27/0x40 mm/vmalloc.c:2731
 adjust_insn_aux_data kernel/bpf/verifier.c:11970 [inline]
 bpf_patch_insn_data+0x329/0x640 kernel/bpf/verifier.c:12023
 convert_ctx_accesses+0x41a/0x1580 kernel/bpf/verifier.c:12565
 bpf_check+0x27f4/0xb620 kernel/bpf/verifier.c:14058
 bpf_prog_load+0xbd1/0x1770 kernel/bpf/syscall.c:2327
 __sys_bpf+0x14b1/0x46e0 kernel/bpf/syscall.c:4618
 __do_sys_bpf kernel/bpf/syscall.c:4722 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4720 [inline]
 __x64_sys_bpf+0x70/0xb0 kernel/bpf/syscall.c:4720
 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+0x61/0xcb

Memory state around the buggy address:
 ffff888123354980: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
 ffff888123354a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888123354a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
                                                       ^
 ffff888123354b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff888123354b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
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+0x105/0x250 mm/slub.c:3535

CPU: 1 PID: 350 Comm: syz-executor.0 Tainted: G    B             5.15.139-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x38/0x49 lib/dump_stack.c:106
 print_address_description.constprop.0+0x24/0x160 mm/kasan/report.c:248
 kasan_report_invalid_free+0x75/0xa0 mm/kasan/report.c:370
 ____kasan_slab_free mm/kasan/common.c:345 [inline]
 __kasan_slab_free+0x134/0x150 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+0x94/0x1a0 mm/slub.c:1749
 slab_free mm/slub.c:3519 [inline]
 kmem_cache_free+0x105/0x250 mm/slub.c:3535
 kfree_skbmem+0x95/0x140 net/core/skbuff.c:701
 __kfree_skb net/core/skbuff.c:758 [inline]
 consume_skb net/core/skbuff.c:930 [inline]
 consume_skb+0xab/0x1d0 net/core/skbuff.c:924
 __sk_msg_free+0x267/0x4e0 net/core/skmsg.c:205
 sk_msg_free net/core/skmsg.c:218 [inline]
 __sk_psock_purge_ingress_msg net/core/skmsg.c:768 [inline]
 __sk_psock_zap_ingress net/core/skmsg.c:786 [inline]
 sk_psock_stop+0x3e4/0x600 net/core/skmsg.c:804
 sock_map_close+0x253/0x310 net/core/sock_map.c:1548
 unix_release+0x73/0xe0 net/unix/af_unix.c:949
 __sock_release+0xc2/0x270 net/socket.c:649
 sock_close+0x10/0x20 net/socket.c:1334
 __fput+0x317/0x960 fs/file_table.c:280
 ____fput+0x9/0x10 fs/file_table.c:308
 task_work_run+0xc2/0x150 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x140/0x150 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x21/0x40 kernel/entry/common.c:301
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f31b5b259da
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24
RSP: 002b:00007ffdbe193520 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f31b5b259da
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f31b5c47980 R08: 0000001b31460000 R09: 00007ffdbe1d4080
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000a752
R13: ffffffffffffffff R14: 00007f31b56aa000 R15: 000000000000a411
 </TASK>

Allocated by task 351:
 kasan_save_stack+0x26/0x50 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:433 [inline]
 __kasan_slab_alloc+0x94/0xc0 mm/kasan/common.c:466
 kasan_slab_alloc include/linux/kasan.h:217 [inline]
 slab_post_alloc_hook mm/slab.h:550 [inline]
 slab_alloc_node mm/slub.c:3240 [inline]
 slab_alloc mm/slub.c:3248 [inline]
 kmem_cache_alloc+0x197/0x480 mm/slub.c:3253
 skb_clone+0x131/0x310 net/core/skbuff.c:1547
 sk_psock_verdict_recv+0x4a/0x9e0 net/core/skmsg.c:1182
 unix_read_sock+0xd8/0x200 net/unix/af_unix.c:2433
 sk_psock_verdict_data_ready+0x104/0x170 net/core/skmsg.c:1225
 unix_dgram_sendmsg+0xc13/0x16d0 net/unix/af_unix.c:1949
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg+0xb5/0xf0 net/socket.c:716
 ____sys_sendmsg+0x3f3/0x990 net/socket.c:2429
 ___sys_sendmsg+0xfc/0x190 net/socket.c:2483
 __sys_sendmmsg+0x160/0x340 net/socket.c:2569
 __do_sys_sendmmsg net/socket.c:2598 [inline]
 __se_sys_sendmmsg net/socket.c:2595 [inline]
 __x64_sys_sendmmsg+0x98/0xf0 net/socket.c:2595
 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+0x61/0xcb

Freed by task 25:
 kasan_save_stack+0x26/0x50 mm/kasan/common.c:38
 kasan_set_track+0x25/0x30 mm/kasan/common.c:45
 kasan_set_free_info+0x24/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:365 [inline]
 ____kasan_slab_free mm/kasan/common.c:327 [inline]
 __kasan_slab_free+0x111/0x150 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+0x94/0x1a0 mm/slub.c:1749
 slab_free mm/slub.c:3519 [inline]
 kmem_cache_free+0x105/0x250 mm/slub.c:3535
 kfree_skbmem+0x95/0x140 net/core/skbuff.c:701
 __kfree_skb net/core/skbuff.c:758 [inline]
 kfree_skb_reason net/core/skbuff.c:778 [inline]
 kfree_skb_reason+0xbb/0x2b0 net/core/skbuff.c:771
 kfree_skb+0xb/0x10 net/core/skbuff.c:792
 sock_drop include/linux/skmsg.h:312 [inline]
 sk_psock_backlog+0x694/0xd00 net/core/skmsg.c:681
 process_one_work+0x62c/0xec0 kernel/workqueue.c:2317
 worker_thread+0x48e/0xdb0 kernel/workqueue.c:2464
 kthread+0x324/0x3e0 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff888123354a00
 which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 0 bytes inside of
 240-byte region [ffff888123354a00, ffff888123354af0)
The buggy address belongs to the page:
page:ffffea00048cd500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x123354
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff8881002fb080
raw: 0000000000000000 00000000000c000c 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 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 37, ts 42039982546, free_ts 42021057563
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook mm/page_alloc.c:2604 [inline]
 prep_new_page+0x1a2/0x310 mm/page_alloc.c:2610
 get_page_from_freelist+0x1ce2/0x30a0 mm/page_alloc.c:4484
 __alloc_pages+0x23f/0x2400 mm/page_alloc.c:5776
 __alloc_pages_node include/linux/gfp.h:591 [inline]
 alloc_pages_node include/linux/gfp.h:605 [inline]
 alloc_pages include/linux/gfp.h:618 [inline]
 alloc_slab_page mm/slub.c:1793 [inline]
 allocate_slab+0x39d/0x530 mm/slub.c:1932
 new_slab mm/slub.c:1995 [inline]
 ___slab_alloc.constprop.0+0x3ca/0x890 mm/slub.c:3028
 __slab_alloc.constprop.0+0x42/0x80 mm/slub.c:3115
 slab_alloc_node mm/slub.c:3206 [inline]
 slab_alloc mm/slub.c:3248 [inline]
 kmem_cache_alloc+0x440/0x480 mm/slub.c:3253
 kmem_cache_alloc_node include/linux/slab.h:474 [inline]
 __alloc_skb+0x14b/0x250 net/core/skbuff.c:416
 alloc_skb include/linux/skbuff.h:1183 [inline]
 ndisc_alloc_skb+0x135/0x320 net/ipv6/ndisc.c:421
 ndisc_send_ns+0x12f/0x7e0 net/ipv6/ndisc.c:627
 addrconf_dad_work+0x9e6/0x1100 net/ipv6/addrconf.c:4204
 process_one_work+0x62c/0xec0 kernel/workqueue.c:2317
 worker_thread+0x48e/0xdb0 kernel/workqueue.c:2464
 kthread+0x324/0x3e0 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1471 [inline]
 free_pcp_prepare+0x1b6/0x4c0 mm/page_alloc.c:1543
 free_unref_page_prepare mm/page_alloc.c:3533 [inline]
 free_unref_page+0x84/0x760 mm/page_alloc.c:3615
 free_the_page mm/page_alloc.c:804 [inline]
 __free_pages+0xd7/0xf0 mm/page_alloc.c:5852
 __vunmap+0x4b2/0x7b0 mm/vmalloc.c:2652
 __vfree+0x21/0x90 mm/vmalloc.c:2700
 vfree+0x27/0x40 mm/vmalloc.c:2731
 adjust_insn_aux_data kernel/bpf/verifier.c:11970 [inline]
 bpf_patch_insn_data+0x329/0x640 kernel/bpf/verifier.c:12023
 convert_ctx_accesses+0x41a/0x1580 kernel/bpf/verifier.c:12565
 bpf_check+0x27f4/0xb620 kernel/bpf/verifier.c:14058
 bpf_prog_load+0xbd1/0x1770 kernel/bpf/syscall.c:2327
 __sys_bpf+0x14b1/0x46e0 kernel/bpf/syscall.c:4618
 __do_sys_bpf kernel/bpf/syscall.c:4722 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4720 [inline]
 __x64_sys_bpf+0x70/0xb0 kernel/bpf/syscall.c:4720
 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+0x61/0xcb

Memory state around the buggy address:
 ffff888123354900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888123354980: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
>ffff888123354a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888123354a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
 ffff888123354b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
==================================================================