RBP: 0000000000000001 R08: 00007fff7b2d7e47 R09: 00000000000000a0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
==================================================================
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+0x3a/0x1f0 net/core/skbuff.c:926
Read of size 4 at addr ffff8881065ce4ac by task syz-executor292/289
CPU: 1 PID: 289 Comm: syz-executor292 Not tainted 5.15.185-syzkaller-00339-ge678c93d43cc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:88
dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106
print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:427 [inline]
kasan_report+0xf1/0x140 mm/kasan/report.c:444
check_region_inline mm/kasan/generic.c:-1 [inline]
kasan_check_range+0x280/0x290 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+0x3a/0x1f0 net/core/skbuff.c:926
__sk_msg_free+0x4f4/0x560 net/core/skmsg.c:205
sk_msg_free net/core/skmsg.c:218 [inline]
__sk_psock_purge_ingress_msg net/core/skmsg.c:773 [inline]
__sk_psock_zap_ingress net/core/skmsg.c:791 [inline]
sk_psock_stop+0x4c9/0x570 net/core/skmsg.c:809
sk_psock_drop+0x226/0x300 net/core/skmsg.c:848
sk_psock_put include/linux/skmsg.h:463 [inline]
sock_map_unref+0x3c2/0x420 net/core/sock_map.c:184
__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+0x3cd/0x600 net/core/sock_map.c:1512
sock_map_close+0x111/0x440 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+0xe0/0x270 net/socket.c:1336
__fput+0x20b/0x8b0 fs/file_table.c:311
____fput+0x15/0x20 fs/file_table.c:339
task_work_run+0x127/0x190 kernel/task_work.c:188
exit_task_work include/linux/task_work.h:33 [inline]
do_exit+0xa76/0x27a0 kernel/exit.c:880
do_group_exit+0x141/0x310 kernel/exit.c:1002
__do_sys_exit_group kernel/exit.c:1013 [inline]
__se_sys_exit_group kernel/exit.c:1011 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1011
x64_sys_call+0x832/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7ff7e8c07c79
Code: Unable to access opcode bytes at RIP 0x7ff7e8c07c4f.
RSP: 002b:00007fff7b2d8048 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff7e8c07c79
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007ff7e8c7b390 R08: ffffffffffffffb8 R09: 00000000000000a0
R10: 0000000000000001 R11: 0000000000000246 R12: 00007ff7e8c7b390
R13: 0000000000000000 R14: 00007ff7e8c7bde0 R15: 00007ff7e8bd1320
Allocated by task 289:
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+0xbd/0xf0 mm/kasan/common.c:466
kasan_slab_alloc include/linux/kasan.h:217 [inline]
slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550
slab_alloc_node mm/slub.c:3240 [inline]
slab_alloc mm/slub.c:3250 [inline]
kmem_cache_alloc+0xf7/0x260 mm/slub.c:3255
skb_clone+0x1cf/0x360 net/core/skbuff.c:1547
sk_psock_verdict_recv+0x53/0x800 net/core/skmsg.c:1187
unix_read_sock+0x10a/0x2c0 net/unix/af_unix.c:2428
sk_psock_verdict_data_ready+0x115/0x170 net/core/skmsg.c:1230
unix_dgram_sendmsg+0x11e6/0x1880 net/unix/af_unix.c:1942
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436
___sys_sendmsg+0x1f0/0x260 net/socket.c:2490
__sys_sendmsg net/socket.c:2519 [inline]
__do_sys_sendmsg net/socket.c:2528 [inline]
__se_sys_sendmsg net/socket.c:2526 [inline]
__x64_sys_sendmsg+0x1e2/0x2a0 net/socket.c:2526
x64_sys_call+0x4b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Freed by task 42:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
____kasan_slab_free+0x125/0x160 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+0xc2/0x190 mm/slub.c:1749
slab_free mm/slub.c:3521 [inline]
kmem_cache_free+0x100/0x320 mm/slub.c:3539
kfree_skbmem+0x10c/0x180 net/core/skbuff.c:-1
__kfree_skb net/core/skbuff.c:758 [inline]
kfree_skb_reason net/core/skbuff.c:778 [inline]
kfree_skb+0xc1/0x2f0 net/core/skbuff.c:792
sock_drop include/linux/skmsg.h:312 [inline]
sk_psock_backlog+0xa85/0xd80 net/core/skmsg.c:684
process_one_work+0x6be/0xba0 kernel/workqueue.c:2325
worker_thread+0xa59/0x1200 kernel/workqueue.c:2472
kthread+0x411/0x500 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
The buggy address belongs to the object at ffff8881065ce3c0
which belongs to the cache skbuff_head_cache of size 248
The buggy address is located 236 bytes inside of
248-byte region [ffff8881065ce3c0, ffff8881065ce4b8)
The buggy address belongs to the page:
page:ffffea0004197380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1065ce
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff8881081aaa80
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 23612872653, free_ts 18452601211
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605
prep_new_page+0x1c/0x110 mm/page_alloc.c:2611
get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485
__alloc_pages+0x18f/0x440 mm/page_alloc.c:5789
alloc_slab_page mm/slub.c:-1 [inline]
allocate_slab mm/slub.c:1932 [inline]
new_slab+0xa1/0x4d0 mm/slub.c:1995
___slab_alloc+0x381/0x810 mm/slub.c:3028
__slab_alloc+0x49/0x90 mm/slub.c:3115
slab_alloc_node mm/slub.c:3206 [inline]
slab_alloc mm/slub.c:3250 [inline]
kmem_cache_alloc+0x138/0x260 mm/slub.c:3255
kmem_cache_alloc_node include/linux/slab.h:489 [inline]
__alloc_skb+0xe0/0x740 net/core/skbuff.c:416
alloc_skb include/linux/skbuff.h:1183 [inline]
nlmsg_new include/net/netlink.h:953 [inline]
audit_buffer_alloc kernel/audit.c:1799 [inline]
audit_log_start+0x3c7/0x8b0 kernel/audit.c:1917
common_lsm_audit+0xd1/0x1600 security/lsm_audit.c:457
slow_avc_audit+0x1ac/0x220 security/selinux/avc.c:802
avc_audit security/selinux/include/avc.h:135 [inline]
avc_has_perm+0x1e6/0x240 security/selinux/avc.c:1190
selinux_bpf_map+0xd2/0x110 security/selinux/hooks.c:6996
security_bpf_map+0x69/0xa0 security/security.c:2621
bpf_map_new_fd+0x2b/0x70 kernel/bpf/syscall.c:711
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+0x542/0x550 mm/page_alloc.c:3534
free_unref_page+0xa2/0x550 mm/page_alloc.c:3616
free_the_page mm/page_alloc.c:805 [inline]
__free_pages+0x6c/0x100 mm/page_alloc.c:5865
free_pages+0x82/0x90 mm/page_alloc.c:5876
_pgd_free arch/x86/mm/pgtable.c:420 [inline]
pgd_free+0x187/0x1a0 arch/x86/mm/pgtable.c:476
mm_free_pgd kernel/fork.c:699 [inline]
__mmdrop+0xad/0x410 kernel/fork.c:750
mmdrop include/linux/sched/mm.h:49 [inline]
finish_task_switch+0x2bb/0x780 kernel/sched/core.c:5052
context_switch kernel/sched/core.c:5158 [inline]
__schedule+0xb76/0x14c0 kernel/sched/core.c:6515
schedule+0x11e/0x1e0 kernel/sched/core.c:6598
do_wait+0x6b3/0x9a0 kernel/exit.c:1613
kernel_wait4+0x1a5/0x260 kernel/exit.c:1757
__do_sys_wait4 kernel/exit.c:1785 [inline]
__se_sys_wait4 kernel/exit.c:1781 [inline]
__x64_sys_wait4+0x130/0x1e0 kernel/exit.c:1781
x64_sys_call+0xec/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:62
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Memory state around the buggy address:
ffff8881065ce380: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
ffff8881065ce400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881065ce480: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc
^
ffff8881065ce500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881065ce580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc
==================================================================
==================================================================
BUG: KASAN: double-free or invalid-free in slab_free mm/slub.c:3521 [inline]
BUG: KASAN: double-free or invalid-free in kmem_cache_free+0x100/0x320 mm/slub.c:3539
CPU: 1 PID: 289 Comm: syz-executor292 Tainted: G B 5.15.185-syzkaller-00339-ge678c93d43cc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:88
dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106
print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
kasan_report_invalid_free+0x58/0x90 mm/kasan/report.c:370
____kasan_slab_free+0x13d/0x160 mm/kasan/common.c:-1
__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+0xc2/0x190 mm/slub.c:1749
slab_free mm/slub.c:3521 [inline]
kmem_cache_free+0x100/0x320 mm/slub.c:3539
kfree_skbmem+0x10c/0x180 net/core/skbuff.c:-1
__kfree_skb net/core/skbuff.c:758 [inline]
consume_skb+0xb3/0x1f0 net/core/skbuff.c:930
__sk_msg_free+0x4f4/0x560 net/core/skmsg.c:205
sk_msg_free net/core/skmsg.c:218 [inline]
__sk_psock_purge_ingress_msg net/core/skmsg.c:773 [inline]
__sk_psock_zap_ingress net/core/skmsg.c:791 [inline]
sk_psock_stop+0x4c9/0x570 net/core/skmsg.c:809
sk_psock_drop+0x226/0x300 net/core/skmsg.c:848
sk_psock_put include/linux/skmsg.h:463 [inline]
sock_map_unref+0x3c2/0x420 net/core/sock_map.c:184
__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+0x3cd/0x600 net/core/sock_map.c:1512
sock_map_close+0x111/0x440 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+0xe0/0x270 net/socket.c:1336
__fput+0x20b/0x8b0 fs/file_table.c:311
____fput+0x15/0x20 fs/file_table.c:339
task_work_run+0x127/0x190 kernel/task_work.c:188
exit_task_work include/linux/task_work.h:33 [inline]
do_exit+0xa76/0x27a0 kernel/exit.c:880
do_group_exit+0x141/0x310 kernel/exit.c:1002
__do_sys_exit_group kernel/exit.c:1013 [inline]
__se_sys_exit_group kernel/exit.c:1011 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1011
x64_sys_call+0x832/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7ff7e8c07c79
Code: Unable to access opcode bytes at RIP 0x7ff7e8c07c4f.
RSP: 002b:00007fff7b2d8048 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff7e8c07c79
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007ff7e8c7b390 R08: ffffffffffffffb8 R09: 00000000000000a0
R10: 0000000000000001 R11: 0000000000000246 R12: 00007ff7e8c7b390
R13: 0000000000000000 R14: 00007ff7e8c7bde0 R15: 00007ff7e8bd1320
Allocated by task 289:
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+0xbd/0xf0 mm/kasan/common.c:466
kasan_slab_alloc include/linux/kasan.h:217 [inline]
slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550
slab_alloc_node mm/slub.c:3240 [inline]
slab_alloc mm/slub.c:3250 [inline]
kmem_cache_alloc+0xf7/0x260 mm/slub.c:3255
skb_clone+0x1cf/0x360 net/core/skbuff.c:1547
sk_psock_verdict_recv+0x53/0x800 net/core/skmsg.c:1187
unix_read_sock+0x10a/0x2c0 net/unix/af_unix.c:2428
sk_psock_verdict_data_ready+0x115/0x170 net/core/skmsg.c:1230
unix_dgram_sendmsg+0x11e6/0x1880 net/unix/af_unix.c:1942
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436
___sys_sendmsg+0x1f0/0x260 net/socket.c:2490
__sys_sendmsg net/socket.c:2519 [inline]
__do_sys_sendmsg net/socket.c:2528 [inline]
__se_sys_sendmsg net/socket.c:2526 [inline]
__x64_sys_sendmsg+0x1e2/0x2a0 net/socket.c:2526
x64_sys_call+0x4b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Freed by task 42:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
____kasan_slab_free+0x125/0x160 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+0xc2/0x190 mm/slub.c:1749
slab_free mm/slub.c:3521 [inline]
kmem_cache_free+0x100/0x320 mm/slub.c:3539
kfree_skbmem+0x10c/0x180 net/core/skbuff.c:-1
__kfree_skb net/core/skbuff.c:758 [inline]
kfree_skb_reason net/core/skbuff.c:778 [inline]
kfree_skb+0xc1/0x2f0 net/core/skbuff.c:792
sock_drop include/linux/skmsg.h:312 [inline]
sk_psock_backlog+0xa85/0xd80 net/core/skmsg.c:684
process_one_work+0x6be/0xba0 kernel/workqueue.c:2325
worker_thread+0xa59/0x1200 kernel/workqueue.c:2472
kthread+0x411/0x500 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
The buggy address belongs to the object at ffff8881065ce3c0
which belongs to the cache skbuff_head_cache of size 248
The buggy address is located 0 bytes inside of
248-byte region [ffff8881065ce3c0, ffff8881065ce4b8)
The buggy address belongs to the page:
page:ffffea0004197380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1065ce
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff8881081aaa80
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 23612872653, free_ts 18452601211
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605
prep_new_page+0x1c/0x110 mm/page_alloc.c:2611
get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485
__alloc_pages+0x18f/0x440 mm/page_alloc.c:5789
alloc_slab_page mm/slub.c:-1 [inline]
allocate_slab mm/slub.c:1932 [inline]
new_slab+0xa1/0x4d0 mm/slub.c:1995
___slab_alloc+0x381/0x810 mm/slub.c:3028
__slab_alloc+0x49/0x90 mm/slub.c:3115
slab_alloc_node mm/slub.c:3206 [inline]
slab_alloc mm/slub.c:3250 [inline]
kmem_cache_alloc+0x138/0x260 mm/slub.c:3255
kmem_cache_alloc_node include/linux/slab.h:489 [inline]
__alloc_skb+0xe0/0x740 net/core/skbuff.c:416
alloc_skb include/linux/skbuff.h:1183 [inline]
nlmsg_new include/net/netlink.h:953 [inline]
audit_buffer_alloc kernel/audit.c:1799 [inline]
audit_log_start+0x3c7/0x8b0 kernel/audit.c:1917
common_lsm_audit+0xd1/0x1600 security/lsm_audit.c:457
slow_avc_audit+0x1ac/0x220 security/selinux/avc.c:802
avc_audit security/selinux/include/avc.h:135 [inline]
avc_has_perm+0x1e6/0x240 security/selinux/avc.c:1190
selinux_bpf_map+0xd2/0x110 security/selinux/hooks.c:6996
security_bpf_map+0x69/0xa0 security/security.c:2621
bpf_map_new_fd+0x2b/0x70 kernel/bpf/syscall.c:711
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+0x542/0x550 mm/page_alloc.c:3534
free_unref_page+0xa2/0x550 mm/page_alloc.c:3616
free_the_page mm/page_alloc.c:805 [inline]
__free_pages+0x6c/0x100 mm/page_alloc.c:5865
free_pages+0x82/0x90 mm/page_alloc.c:5876
_pgd_free arch/x86/mm/pgtable.c:420 [inline]
pgd_free+0x187/0x1a0 arch/x86/mm/pgtable.c:476
mm_free_pgd kernel/fork.c:699 [inline]
__mmdrop+0xad/0x410 kernel/fork.c:750
mmdrop include/linux/sched/mm.h:49 [inline]
finish_task_switch+0x2bb/0x780 kernel/sched/core.c:5052
context_switch kernel/sched/core.c:5158 [inline]
__schedule+0xb76/0x14c0 kernel/sched/core.c:6515
schedule+0x11e/0x1e0 kernel/sched/core.c:6598
do_wait+0x6b3/0x9a0 kernel/exit.c:1613
kernel_wait4+0x1a5/0x260 kernel/exit.c:1757
__do_sys_wait4 kernel/exit.c:1785 [inline]
__se_sys_wait4 kernel/exit.c:1781 [inline]
__x64_sys_wait4+0x130/0x1e0 kernel/exit.c:1781
x64_sys_call+0xec/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:62
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Memory state around the buggy address:
ffff8881065ce280: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881065ce300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc
>ffff8881065ce380: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff8881065ce400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881065ce480: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc
==================================================================