RBP: 0000000000000001 R08: 00007ffd684f9bd7 R09: 00000010684f0037
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd684f9e90
R13: 00007ffd684f9eb0 R14: 00007ffd684f9e88 R15: 00007fe4f7977032
==================================================================
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 ffff88811cf220ec by task syz-executor141/299
CPU: 0 PID: 299 Comm: syz-executor141 Not tainted 5.15.147-syzkaller-00327-g1c3a1f32bcbd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1b7 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:768 [inline]
__sk_psock_zap_ingress net/core/skmsg.c:786 [inline]
sk_psock_stop+0x44c/0x4d0 net/core/skmsg.c:804
sock_map_close+0x2b9/0x4c0 net/core/sock_map.c:1548
unix_release+0x82/0xc0 net/unix/af_unix.c:949
__sock_release net/socket.c:649 [inline]
sock_close+0xdf/0x270 net/socket.c:1336
__fput+0x3fe/0x910 fs/file_table.c:280
____fput+0x15/0x20 fs/file_table.c:308
task_work_run+0x129/0x190 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xc48/0x2ca0 kernel/exit.c:878
do_group_exit+0x141/0x310 kernel/exit.c:1000
__do_sys_exit_group kernel/exit.c:1011 [inline]
__se_sys_exit_group kernel/exit.c:1009 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1009
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fe4f7925ec9
Code: Unable to access opcode bytes at RIP 0x7fe4f7925e9f.
RSP: 002b:00007ffd684f9e08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fe4f7925ec9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 00007fe4f79a9390 R08: ffffffffffffffb8 R09: 00000010684f0037
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe4f79a9390
R13: 0000000000000000 R14: 00007fe4f79aae60 R15: 00007fe4f78f6740
Allocated by task 299:
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:1182
unix_read_sock+0x132/0x370 net/unix/af_unix.c:2433
sk_psock_verdict_data_ready+0x147/0x1a0 net/core/skmsg.c:1225
unix_dgram_sendmsg+0x15fa/0x2090 net/unix/af_unix.c:1949
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_sendmmsg+0x2bf/0x530 net/socket.c:2571
__do_sys_sendmmsg net/socket.c:2600 [inline]
__se_sys_sendmmsg net/socket.c:2597 [inline]
__x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2597
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
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:681
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2317
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2464
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
The buggy address belongs to the object at ffff88811cf22000
which belongs to the cache skbuff_head_cache of size 248
The buggy address is located 236 bytes inside of
248-byte region [ffff88811cf22000, ffff88811cf220f8)
The buggy address belongs to the page:
page:ffffea000473c880 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11cf22
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff8881003fec00
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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 20, ts 36844734042, free_ts 18756012831
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2604
prep_new_page+0x1b/0x110 mm/page_alloc.c:2610
get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4484
__alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5776
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
kmem_cache_alloc_node include/linux/slab.h:474 [inline]
__alloc_skb+0xbe/0x550 net/core/skbuff.c:416
alloc_skb include/linux/skbuff.h:1183 [inline]
alloc_skb_with_frags+0xa6/0x680 net/core/skbuff.c:6156
sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2525
sock_alloc_send_skb+0x32/0x40 net/core/sock.c:2542
mld_newpack+0x1b4/0xa20 net/ipv6/mcast.c:1748
add_grhead net/ipv6/mcast.c:1851 [inline]
add_grec+0xdc8/0x13a0 net/ipv6/mcast.c:1989
mld_send_cr net/ipv6/mcast.c:2115 [inline]
mld_ifc_work+0x72e/0xbb0 net/ipv6/mcast.c:2653
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2317
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 mm/page_alloc.c:1543 [inline]
free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3533
free_unref_page+0xe8/0x750 mm/page_alloc.c:3615
__put_single_page mm/swap.c:98 [inline]
__put_page+0xb0/0xe0 mm/swap.c:129
put_page include/linux/mm.h:1295 [inline]
anon_pipe_buf_release+0x187/0x200 fs/pipe.c:137
pipe_buf_release include/linux/pipe_fs_i.h:203 [inline]
pipe_read+0x5a6/0x1040 fs/pipe.c:323
call_read_iter include/linux/fs.h:2196 [inline]
new_sync_read fs/read_write.c:404 [inline]
vfs_read+0xa7e/0xd40 fs/read_write.c:485
ksys_read+0x199/0x2c0 fs/read_write.c:623
__do_sys_read fs/read_write.c:633 [inline]
__se_sys_read fs/read_write.c:631 [inline]
__x64_sys_read+0x7b/0x90 fs/read_write.c:631
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Memory state around the buggy address:
ffff88811cf21f80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
ffff88811cf22000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811cf22080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc
^
ffff88811cf22100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
ffff88811cf22180: 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+0x116/0x2e0 mm/slub.c:3535
CPU: 0 PID: 299 Comm: syz-executor141 Tainted: G B 5.15.147-syzkaller-00327-g1c3a1f32bcbd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1b7 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:768 [inline]
__sk_psock_zap_ingress net/core/skmsg.c:786 [inline]
sk_psock_stop+0x44c/0x4d0 net/core/skmsg.c:804
sock_map_close+0x2b9/0x4c0 net/core/sock_map.c:1548
unix_release+0x82/0xc0 net/unix/af_unix.c:949
__sock_release net/socket.c:649 [inline]
sock_close+0xdf/0x270 net/socket.c:1336
__fput+0x3fe/0x910 fs/file_table.c:280
____fput+0x15/0x20 fs/file_table.c:308
task_work_run+0x129/0x190 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xc48/0x2ca0 kernel/exit.c:878
do_group_exit+0x141/0x310 kernel/exit.c:1000
__do_sys_exit_group kernel/exit.c:1011 [inline]
__se_sys_exit_group kernel/exit.c:1009 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1009
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fe4f7925ec9
Code: Unable to access opcode bytes at RIP 0x7fe4f7925e9f.
RSP: 002b:00007ffd684f9e08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fe4f7925ec9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 00007fe4f79a9390 R08: ffffffffffffffb8 R09: 00000010684f0037
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe4f79a9390
R13: 0000000000000000 R14: 00007fe4f79aae60 R15: 00007fe4f78f6740
Allocated by task 299:
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:1182
unix_read_sock+0x132/0x370 net/unix/af_unix.c:2433
sk_psock_verdict_data_ready+0x147/0x1a0 net/core/skmsg.c:1225
unix_dgram_sendmsg+0x15fa/0x2090 net/unix/af_unix.c:1949
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_sendmmsg+0x2bf/0x530 net/socket.c:2571
__do_sys_sendmmsg net/socket.c:2600 [inline]
__se_sys_sendmmsg net/socket.c:2597 [inline]
__x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2597
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
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:681
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2317
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2464
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
The buggy address belongs to the object at ffff88811cf22000
which belongs to the cache skbuff_head_cache of size 248
The buggy address is located 0 bytes inside of
248-byte region [ffff88811cf22000, ffff88811cf220f8)
The buggy address belongs to the page:
page:ffffea000473c880 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11cf22
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff8881003fec00
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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 20, ts 36844734042, free_ts 18756012831
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2604
prep_new_page+0x1b/0x110 mm/page_alloc.c:2610
get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4484
__alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5776
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
kmem_cache_alloc_node include/linux/slab.h:474 [inline]
__alloc_skb+0xbe/0x550 net/core/skbuff.c:416
alloc_skb include/linux/skbuff.h:1183 [inline]
alloc_skb_with_frags+0xa6/0x680 net/core/skbuff.c:6156
sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2525
sock_alloc_send_skb+0x32/0x40 net/core/sock.c:2542
mld_newpack+0x1b4/0xa20 net/ipv6/mcast.c:1748
add_grhead net/ipv6/mcast.c:1851 [inline]
add_grec+0xdc8/0x13a0 net/ipv6/mcast.c:1989
mld_send_cr net/ipv6/mcast.c:2115 [inline]
mld_ifc_work+0x72e/0xbb0 net/ipv6/mcast.c:2653
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2317
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 mm/page_alloc.c:1543 [inline]
free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3533
free_unref_page+0xe8/0x750 mm/page_alloc.c:3615
__put_single_page mm/swap.c:98 [inline]
__put_page+0xb0/0xe0 mm/swap.c:129
put_page include/linux/mm.h:1295 [inline]
anon_pipe_buf_release+0x187/0x200 fs/pipe.c:137
pipe_buf_release include/linux/pipe_fs_i.h:203 [inline]
pipe_read+0x5a6/0x1040 fs/pipe.c:323
call_read_iter include/linux/fs.h:2196 [inline]
new_sync_read fs/read_write.c:404 [inline]
vfs_read+0xa7e/0xd40 fs/read_write.c:485
ksys_read+0x199/0x2c0 fs/read_write.c:623
__do_sys_read fs/read_write.c:633 [inline]
__se_sys_read fs/read_write.c:631 [inline]
__x64_sys_read+0x7b/0x90 fs/read_write.c:631
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Memory state around the buggy address:
ffff88811cf21f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88811cf21f80: fa fb fb fb fc