==================================================================
BUG: KASAN: slab-out-of-bounds in iov_iter_revert lib/iov_iter.c:633 [inline]
BUG: KASAN: slab-out-of-bounds in iov_iter_revert+0x443/0x5a0 lib/iov_iter.c:611
Read of size 4 at addr ffff888023369f38 by task kworker/u8:3/53
CPU: 0 UID: 0 PID: 53 Comm: kworker/u8:3 Not tainted 6.14.0-rc7-syzkaller-00196-g88d324e69ea9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xd9/0x110 mm/kasan/report.c:634
iov_iter_revert lib/iov_iter.c:633 [inline]
iov_iter_revert+0x443/0x5a0 lib/iov_iter.c:611
netfs_retry_write_stream fs/netfs/write_retry.c:44 [inline]
netfs_retry_writes+0x163d/0x1a00 fs/netfs/write_retry.c:231
netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
netfs_write_collection_worker+0x23de/0x37d0 fs/netfs/write_collect.c:374
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3400
kthread+0x3b2/0x750 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Allocated by task 7915:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_noprof+0x21c/0x510 mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
lsm_blob_alloc+0x68/0x90 security/security.c:684
lsm_sock_alloc security/security.c:4839 [inline]
security_sk_alloc+0x30/0x270 security/security.c:4855
sk_prot_alloc+0xfb/0x2a0 net/core/sock.c:2184
sk_alloc+0x36/0xc20 net/core/sock.c:2234
unix_create1+0xa6/0x6c0 net/unix/af_unix.c:1021
unix_create+0x10e/0x1d0 net/unix/af_unix.c:1091
__sock_create+0x338/0x8d0 net/socket.c:1548
sock_create net/socket.c:1606 [inline]
__sys_socketpair+0x25d/0x5a0 net/socket.c:1757
__do_sys_socketpair net/socket.c:1806 [inline]
__se_sys_socketpair net/socket.c:1803 [inline]
__x64_sys_socketpair+0x96/0x100 net/socket.c:1803
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 7921:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kfree+0x2c4/0x4d0 mm/slub.c:4757
security_sk_free+0x9d/0x1a0 security/security.c:4874
sk_prot_free net/core/sock.c:2213 [inline]
__sk_destruct+0x44d/0x6f0 net/core/sock.c:2312
sk_destruct+0xc2/0xf0 net/core/sock.c:2340
__sk_free+0xf4/0x3e0 net/core/sock.c:2351
sock_wfree+0x276/0x880 net/core/sock.c:2613
unix_destruct_scm+0x138/0x190 net/unix/af_unix.c:1879
skb_release_head_state+0xa6/0x290 net/core/skbuff.c:1087
skb_release_all net/core/skbuff.c:1098 [inline]
__kfree_skb net/core/skbuff.c:1114 [inline]
sk_skb_reason_drop+0xeb/0x1a0 net/core/skbuff.c:1152
kfree_skb_reason include/linux/skbuff.h:1271 [inline]
unix_release_sock+0x789/0x1210 net/unix/af_unix.c:721
unix_release+0x91/0xf0 net/unix/af_unix.c:1106
__sock_release+0xb3/0x270 net/socket.c:647
sock_close+0x1c/0x30 net/socket.c:1398
__fput+0x402/0xb70 fs/file_table.c:464
task_work_run+0x151/0x250 kernel/task_work.c:227
get_signal+0x1d3/0x26c0 kernel/signal.c:2809
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888023369f20
which belongs to the cache kmalloc-16 of size 16
The buggy address is located 8 bytes to the right of
allocated 16-byte region [ffff888023369f20, ffff888023369f30)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888023369080 pfn:0x23369
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b041640 dead000000000100 dead000000000122
raw: ffff888023369080 0000000080800079 00000000f5000000 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5837, tgid 5837 (syz-executor), ts 242189329938, free_ts 242098253989
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4740
alloc_slab_page mm/slub.c:2425 [inline]
allocate_slab mm/slub.c:2587 [inline]
new_slab+0x94/0x330 mm/slub.c:2640
___slab_alloc+0xc5d/0x1720 mm/slub.c:3826
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916
__slab_alloc_node mm/slub.c:3991 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__do_kmalloc_node mm/slub.c:4293 [inline]
__kmalloc_node_noprof+0x2f0/0x510 mm/slub.c:4300
__kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:665
xt_jumpstack_alloc net/netfilter/x_tables.c:1355 [inline]
xt_replace_table+0x1e3/0x940 net/netfilter/x_tables.c:1394
__do_replace+0x1d3/0x9e0 net/ipv4/netfilter/arp_tables.c:912
do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline]
do_ip6t_set_ctl+0x965/0xbf0 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x135/0x170 net/ipv6/ipv6_sockglue.c:998
tcp_setsockopt+0xa7/0x100 net/ipv4/tcp.c:4043
do_sock_setsockopt+0x225/0x480 net/socket.c:2303
__sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 7346 tgid 7337 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7b0 mm/mmu_gather.c:491
exit_mmap+0x40e/0xba0 mm/mmap.c:1297
__mmput+0x12a/0x410 kernel/fork.c:1356
mmput+0x62/0x70 kernel/fork.c:1378
exit_mm kernel/exit.c:570 [inline]
do_exit+0x9ba/0x2db0 kernel/exit.c:925
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x24ed/0x26c0 kernel/signal.c:3036
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888023369e00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff888023369e80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff888023369f00: fa fb fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc
^
ffff888023369f80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff88802336a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in iov_iter_revert lib/iov_iter.c:633 [inline]
BUG: KASAN: slab-use-after-free in iov_iter_revert+0x521/0x5a0 lib/iov_iter.c:611
Read of size 4 at addr ffff888023369f28 by task kworker/u8:3/53
CPU: 1 UID: 0 PID: 53 Comm: kworker/u8:3 Tainted: G B 6.14.0-rc7-syzkaller-00196-g88d324e69ea9 #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xd9/0x110 mm/kasan/report.c:634
iov_iter_revert lib/iov_iter.c:633 [inline]
iov_iter_revert+0x521/0x5a0 lib/iov_iter.c:611
netfs_retry_write_stream fs/netfs/write_retry.c:44 [inline]
netfs_retry_writes+0x163d/0x1a00 fs/netfs/write_retry.c:231
netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
netfs_write_collection_worker+0x23de/0x37d0 fs/netfs/write_collect.c:374
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3400
kthread+0x3b2/0x750 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Allocated by task 7915:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_noprof+0x21c/0x510 mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
lsm_blob_alloc+0x68/0x90 security/security.c:684
lsm_sock_alloc security/security.c:4839 [inline]
security_sk_alloc+0x30/0x270 security/security.c:4855
sk_prot_alloc+0xfb/0x2a0 net/core/sock.c:2184
sk_alloc+0x36/0xc20 net/core/sock.c:2234
unix_create1+0xa6/0x6c0 net/unix/af_unix.c:1021
unix_create+0x10e/0x1d0 net/unix/af_unix.c:1091
__sock_create+0x338/0x8d0 net/socket.c:1548
sock_create net/socket.c:1606 [inline]
__sys_socketpair+0x25d/0x5a0 net/socket.c:1757
__do_sys_socketpair net/socket.c:1806 [inline]
__se_sys_socketpair net/socket.c:1803 [inline]
__x64_sys_socketpair+0x96/0x100 net/socket.c:1803
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 7921:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kfree+0x2c4/0x4d0 mm/slub.c:4757
security_sk_free+0x9d/0x1a0 security/security.c:4874
sk_prot_free net/core/sock.c:2213 [inline]
__sk_destruct+0x44d/0x6f0 net/core/sock.c:2312
sk_destruct+0xc2/0xf0 net/core/sock.c:2340
__sk_free+0xf4/0x3e0 net/core/sock.c:2351
sock_wfree+0x276/0x880 net/core/sock.c:2613
unix_destruct_scm+0x138/0x190 net/unix/af_unix.c:1879
skb_release_head_state+0xa6/0x290 net/core/skbuff.c:1087
skb_release_all net/core/skbuff.c:1098 [inline]
__kfree_skb net/core/skbuff.c:1114 [inline]
sk_skb_reason_drop+0xeb/0x1a0 net/core/skbuff.c:1152
kfree_skb_reason include/linux/skbuff.h:1271 [inline]
unix_release_sock+0x789/0x1210 net/unix/af_unix.c:721
unix_release+0x91/0xf0 net/unix/af_unix.c:1106
__sock_release+0xb3/0x270 net/socket.c:647
sock_close+0x1c/0x30 net/socket.c:1398
__fput+0x402/0xb70 fs/file_table.c:464
task_work_run+0x151/0x250 kernel/task_work.c:227
get_signal+0x1d3/0x26c0 kernel/signal.c:2809
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888023369f20
which belongs to the cache kmalloc-16 of size 16
The buggy address is located 8 bytes inside of
freed 16-byte region [ffff888023369f20, ffff888023369f30)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888023369080 pfn:0x23369
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b041640 dead000000000100 dead000000000122
raw: ffff888023369080 0000000080800079 00000000f5000000 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5837, tgid 5837 (syz-executor), ts 242189329938, free_ts 242098253989
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4740
alloc_slab_page mm/slub.c:2425 [inline]
allocate_slab mm/slub.c:2587 [inline]
new_slab+0x94/0x330 mm/slub.c:2640
___slab_alloc+0xc5d/0x1720 mm/slub.c:3826
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916
__slab_alloc_node mm/slub.c:3991 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__do_kmalloc_node mm/slub.c:4293 [inline]
__kmalloc_node_noprof+0x2f0/0x510 mm/slub.c:4300
__kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:665
xt_jumpstack_alloc net/netfilter/x_tables.c:1355 [inline]
xt_replace_table+0x1e3/0x940 net/netfilter/x_tables.c:1394
__do_replace+0x1d3/0x9e0 net/ipv4/netfilter/arp_tables.c:912
do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline]
do_ip6t_set_ctl+0x965/0xbf0 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x135/0x170 net/ipv6/ipv6_sockglue.c:998
tcp_setsockopt+0xa7/0x100 net/ipv4/tcp.c:4043
do_sock_setsockopt+0x225/0x480 net/socket.c:2303
__sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 7346 tgid 7337 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7b0 mm/mmu_gather.c:491
exit_mmap+0x40e/0xba0 mm/mmap.c:1297
__mmput+0x12a/0x410 kernel/fork.c:1356
mmput+0x62/0x70 kernel/fork.c:1378
exit_mm kernel/exit.c:570 [inline]
do_exit+0x9ba/0x2db0 kernel/exit.c:925
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x24ed/0x26c0 kernel/signal.c:3036
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888023369e00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff888023369e80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff888023369f00: fa fb fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc
^
ffff888023369f80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff88802336a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in iov_iter_bvec_advance lib/iov_iter.c:504 [inline]
BUG: KASAN: slab-use-after-free in iov_iter_advance+0x652/0x6c0 lib/iov_iter.c:576
Read of size 4 at addr ffff888023369f28 by task kworker/u8:3/53
CPU: 0 UID: 0 PID: 53 Comm: kworker/u8:3 Tainted: G B 6.14.0-rc7-syzkaller-00196-g88d324e69ea9 #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xd9/0x110 mm/kasan/report.c:634
iov_iter_bvec_advance lib/iov_iter.c:504 [inline]
iov_iter_advance+0x652/0x6c0 lib/iov_iter.c:576
netfs_reissue_write+0x13d/0x240 fs/netfs/write_issue.c:250
netfs_retry_write_stream fs/netfs/write_retry.c:46 [inline]
netfs_retry_writes+0x165a/0x1a00 fs/netfs/write_retry.c:231
netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
netfs_write_collection_worker+0x23de/0x37d0 fs/netfs/write_collect.c:374
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3400
kthread+0x3b2/0x750 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Allocated by task 7915:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_noprof+0x21c/0x510 mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
lsm_blob_alloc+0x68/0x90 security/security.c:684
lsm_sock_alloc security/security.c:4839 [inline]
security_sk_alloc+0x30/0x270 security/security.c:4855
sk_prot_alloc+0xfb/0x2a0 net/core/sock.c:2184
sk_alloc+0x36/0xc20 net/core/sock.c:2234
unix_create1+0xa6/0x6c0 net/unix/af_unix.c:1021
unix_create+0x10e/0x1d0 net/unix/af_unix.c:1091
__sock_create+0x338/0x8d0 net/socket.c:1548
sock_create net/socket.c:1606 [inline]
__sys_socketpair+0x25d/0x5a0 net/socket.c:1757
__do_sys_socketpair net/socket.c:1806 [inline]
__se_sys_socketpair net/socket.c:1803 [inline]
__x64_sys_socketpair+0x96/0x100 net/socket.c:1803
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 7921:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kfree+0x2c4/0x4d0 mm/slub.c:4757
security_sk_free+0x9d/0x1a0 security/security.c:4874
sk_prot_free net/core/sock.c:2213 [inline]
__sk_destruct+0x44d/0x6f0 net/core/sock.c:2312
sk_destruct+0xc2/0xf0 net/core/sock.c:2340
__sk_free+0xf4/0x3e0 net/core/sock.c:2351
sock_wfree+0x276/0x880 net/core/sock.c:2613
unix_destruct_scm+0x138/0x190 net/unix/af_unix.c:1879
skb_release_head_state+0xa6/0x290 net/core/skbuff.c:1087
skb_release_all net/core/skbuff.c:1098 [inline]
__kfree_skb net/core/skbuff.c:1114 [inline]
sk_skb_reason_drop+0xeb/0x1a0 net/core/skbuff.c:1152
kfree_skb_reason include/linux/skbuff.h:1271 [inline]
unix_release_sock+0x789/0x1210 net/unix/af_unix.c:721
unix_release+0x91/0xf0 net/unix/af_unix.c:1106
__sock_release+0xb3/0x270 net/socket.c:647
sock_close+0x1c/0x30 net/socket.c:1398
__fput+0x402/0xb70 fs/file_table.c:464
task_work_run+0x151/0x250 kernel/task_work.c:227
get_signal+0x1d3/0x26c0 kernel/signal.c:2809
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888023369f20
which belongs to the cache kmalloc-16 of size 16
The buggy address is located 8 bytes inside of
freed 16-byte region [ffff888023369f20, ffff888023369f30)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888023369080 pfn:0x23369
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b041640 dead000000000100 dead000000000122
raw: ffff888023369080 0000000080800079 00000000f5000000 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5837, tgid 5837 (syz-executor), ts 242189329938, free_ts 242098253989
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4740
alloc_slab_page mm/slub.c:2425 [inline]
allocate_slab mm/slub.c:2587 [inline]
new_slab+0x94/0x330 mm/slub.c:2640
___slab_alloc+0xc5d/0x1720 mm/slub.c:3826
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916
__slab_alloc_node mm/slub.c:3991 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__do_kmalloc_node mm/slub.c:4293 [inline]
__kmalloc_node_noprof+0x2f0/0x510 mm/slub.c:4300
__kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:665
xt_jumpstack_alloc net/netfilter/x_tables.c:1355 [inline]
xt_replace_table+0x1e3/0x940 net/netfilter/x_tables.c:1394
__do_replace+0x1d3/0x9e0 net/ipv4/netfilter/arp_tables.c:912
do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline]
do_ip6t_set_ctl+0x965/0xbf0 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x135/0x170 net/ipv6/ipv6_sockglue.c:998
tcp_setsockopt+0xa7/0x100 net/ipv4/tcp.c:4043
do_sock_setsockopt+0x225/0x480 net/socket.c:2303
__sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 7346 tgid 7337 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7b0 mm/mmu_gather.c:491
exit_mmap+0x40e/0xba0 mm/mmap.c:1297
__mmput+0x12a/0x410 kernel/fork.c:1356
mmput+0x62/0x70 kernel/fork.c:1378
exit_mm kernel/exit.c:570 [inline]
do_exit+0x9ba/0x2db0 kernel/exit.c:925
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x24ed/0x26c0 kernel/signal.c:3036
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888023369e00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff888023369e80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff888023369f00: fa fb fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc
^
ffff888023369f80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff88802336a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in iterate_bvec include/linux/iov_iter.h:117 [inline]
BUG: KASAN: slab-use-after-free in iterate_and_advance2 include/linux/iov_iter.h:304 [inline]
BUG: KASAN: slab-use-after-free in iterate_and_advance include/linux/iov_iter.h:328 [inline]
BUG: KASAN: slab-use-after-free in __copy_from_iter lib/iov_iter.c:249 [inline]
BUG: KASAN: slab-use-after-free in _copy_from_iter+0x1507/0x1560 lib/iov_iter.c:260
Read of size 4 at addr ffff888023369f2c by task kworker/u8:3/53
CPU: 1 UID: 0 PID: 53 Comm: kworker/u8:3 Tainted: G B 6.14.0-rc7-syzkaller-00196-g88d324e69ea9 #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xd9/0x110 mm/kasan/report.c:634
iterate_bvec include/linux/iov_iter.h:117 [inline]
iterate_and_advance2 include/linux/iov_iter.h:304 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
__copy_from_iter lib/iov_iter.c:249 [inline]
_copy_from_iter+0x1507/0x1560 lib/iov_iter.c:260
copy_from_iter include/linux/uio.h:228 [inline]
copy_from_iter_full include/linux/uio.h:245 [inline]
pdu_write_u net/9p/protocol.c:234 [inline]
p9pdu_vwritef+0x2d0/0x1cf0 net/9p/protocol.c:614
p9_client_prepare_req+0x244/0x4d0 net/9p/client.c:651
p9_client_rpc+0x1c3/0xc10 net/9p/client.c:691
p9_client_write+0x31f/0x680 net/9p/client.c:1645
v9fs_issue_write+0xe4/0x1b0 fs/9p/vfs_addr.c:59
netfs_do_issue_write+0x95/0x110 fs/netfs/write_issue.c:239
netfs_retry_write_stream fs/netfs/write_retry.c:46 [inline]
netfs_retry_writes+0x165a/0x1a00 fs/netfs/write_retry.c:231
netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
netfs_write_collection_worker+0x23de/0x37d0 fs/netfs/write_collect.c:374
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3400
kthread+0x3b2/0x750 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Allocated by task 7915:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_noprof+0x21c/0x510 mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
lsm_blob_alloc+0x68/0x90 security/security.c:684
lsm_sock_alloc security/security.c:4839 [inline]
security_sk_alloc+0x30/0x270 security/security.c:4855
sk_prot_alloc+0xfb/0x2a0 net/core/sock.c:2184
sk_alloc+0x36/0xc20 net/core/sock.c:2234
unix_create1+0xa6/0x6c0 net/unix/af_unix.c:1021
unix_create+0x10e/0x1d0 net/unix/af_unix.c:1091
__sock_create+0x338/0x8d0 net/socket.c:1548
sock_create net/socket.c:1606 [inline]
__sys_socketpair+0x25d/0x5a0 net/socket.c:1757
__do_sys_socketpair net/socket.c:1806 [inline]
__se_sys_socketpair net/socket.c:1803 [inline]
__x64_sys_socketpair+0x96/0x100 net/socket.c:1803
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 7921:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kfree+0x2c4/0x4d0 mm/slub.c:4757
security_sk_free+0x9d/0x1a0 security/security.c:4874
sk_prot_free net/core/sock.c:2213 [inline]
__sk_destruct+0x44d/0x6f0 net/core/sock.c:2312
sk_destruct+0xc2/0xf0 net/core/sock.c:2340
__sk_free+0xf4/0x3e0 net/core/sock.c:2351
sock_wfree+0x276/0x880 net/core/sock.c:2613
unix_destruct_scm+0x138/0x190 net/unix/af_unix.c:1879
skb_release_head_state+0xa6/0x290 net/core/skbuff.c:1087
skb_release_all net/core/skbuff.c:1098 [inline]
__kfree_skb net/core/skbuff.c:1114 [inline]
sk_skb_reason_drop+0xeb/0x1a0 net/core/skbuff.c:1152
kfree_skb_reason include/linux/skbuff.h:1271 [inline]
unix_release_sock+0x789/0x1210 net/unix/af_unix.c:721
unix_release+0x91/0xf0 net/unix/af_unix.c:1106
__sock_release+0xb3/0x270 net/socket.c:647
sock_close+0x1c/0x30 net/socket.c:1398
__fput+0x402/0xb70 fs/file_table.c:464
task_work_run+0x151/0x250 kernel/task_work.c:227
get_signal+0x1d3/0x26c0 kernel/signal.c:2809
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888023369f20
which belongs to the cache kmalloc-16 of size 16
The buggy address is located 12 bytes inside of
freed 16-byte region [ffff888023369f20, ffff888023369f30)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x23369
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b041640 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000800080 00000000f5000000 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5837, tgid 5837 (syz-executor), ts 242189329938, free_ts 242098253989
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4740
alloc_slab_page mm/slub.c:2425 [inline]
allocate_slab mm/slub.c:2587 [inline]
new_slab+0x94/0x330 mm/slub.c:2640
___slab_alloc+0xc5d/0x1720 mm/slub.c:3826
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916
__slab_alloc_node mm/slub.c:3991 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__do_kmalloc_node mm/slub.c:4293 [inline]
__kmalloc_node_noprof+0x2f0/0x510 mm/slub.c:4300
__kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:665
xt_jumpstack_alloc net/netfilter/x_tables.c:1355 [inline]
xt_replace_table+0x1e3/0x940 net/netfilter/x_tables.c:1394
__do_replace+0x1d3/0x9e0 net/ipv4/netfilter/arp_tables.c:912
do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline]
do_ip6t_set_ctl+0x965/0xbf0 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x135/0x170 net/ipv6/ipv6_sockglue.c:998
tcp_setsockopt+0xa7/0x100 net/ipv4/tcp.c:4043
do_sock_setsockopt+0x225/0x480 net/socket.c:2303
__sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 7346 tgid 7337 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7b0 mm/mmu_gather.c:491
exit_mmap+0x40e/0xba0 mm/mmap.c:1297
__mmput+0x12a/0x410 kernel/fork.c:1356
mmput+0x62/0x70 kernel/fork.c:1378
exit_mm kernel/exit.c:570 [inline]
do_exit+0x9ba/0x2db0 kernel/exit.c:925
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x24ed/0x26c0 kernel/signal.c:3036
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888023369e00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff888023369e80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff888023369f00: fa fb fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc
^
ffff888023369f80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff88802336a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in iterate_bvec include/linux/iov_iter.h:118 [inline]
BUG: KASAN: slab-use-after-free in iterate_and_advance2 include/linux/iov_iter.h:304 [inline]
BUG: KASAN: slab-use-after-free in iterate_and_advance include/linux/iov_iter.h:328 [inline]
BUG: KASAN: slab-use-after-free in __copy_from_iter lib/iov_iter.c:249 [inline]
BUG: KASAN: slab-use-after-free in _copy_from_iter+0x14a2/0x1560 lib/iov_iter.c:260
Read of size 8 at addr ffff888023369f20 by task kworker/u8:3/53
CPU: 1 UID: 0 PID: 53 Comm: kworker/u8:3 Tainted: G B 6.14.0-rc7-syzkaller-00196-g88d324e69ea9 #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xd9/0x110 mm/kasan/report.c:634
iterate_bvec include/linux/iov_iter.h:118 [inline]
iterate_and_advance2 include/linux/iov_iter.h:304 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
__copy_from_iter lib/iov_iter.c:249 [inline]
_copy_from_iter+0x14a2/0x1560 lib/iov_iter.c:260
copy_from_iter include/linux/uio.h:228 [inline]
copy_from_iter_full include/linux/uio.h:245 [inline]
pdu_write_u net/9p/protocol.c:234 [inline]
p9pdu_vwritef+0x2d0/0x1cf0 net/9p/protocol.c:614
p9_client_prepare_req+0x244/0x4d0 net/9p/client.c:651
p9_client_rpc+0x1c3/0xc10 net/9p/client.c:691
p9_client_write+0x31f/0x680 net/9p/client.c:1645
v9fs_issue_write+0xe4/0x1b0 fs/9p/vfs_addr.c:59
netfs_do_issue_write+0x95/0x110 fs/netfs/write_issue.c:239
netfs_retry_write_stream fs/netfs/write_retry.c:46 [inline]
netfs_retry_writes+0x165a/0x1a00 fs/netfs/write_retry.c:231
netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
netfs_write_collection_worker+0x23de/0x37d0 fs/netfs/write_collect.c:374
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3400
kthread+0x3b2/0x750 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Allocated by task 7915:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_noprof+0x21c/0x510 mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
lsm_blob_alloc+0x68/0x90 security/security.c:684
lsm_sock_alloc security/security.c:4839 [inline]
security_sk_alloc+0x30/0x270 security/security.c:4855
sk_prot_alloc+0xfb/0x2a0 net/core/sock.c:2184
sk_alloc+0x36/0xc20 net/core/sock.c:2234
unix_create1+0xa6/0x6c0 net/unix/af_unix.c:1021
unix_create+0x10e/0x1d0 net/unix/af_unix.c:1091
__sock_create+0x338/0x8d0 net/socket.c:1548
sock_create net/socket.c:1606 [inline]
__sys_socketpair+0x25d/0x5a0 net/socket.c:1757
__do_sys_socketpair net/socket.c:1806 [inline]
__se_sys_socketpair net/socket.c:1803 [inline]
__x64_sys_socketpair+0x96/0x100 net/socket.c:1803
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 7921:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kfree+0x2c4/0x4d0 mm/slub.c:4757
security_sk_free+0x9d/0x1a0 security/security.c:4874
sk_prot_free net/core/sock.c:2213 [inline]
__sk_destruct+0x44d/0x6f0 net/core/sock.c:2312
sk_destruct+0xc2/0xf0 net/core/sock.c:2340
__sk_free+0xf4/0x3e0 net/core/sock.c:2351
sock_wfree+0x276/0x880 net/core/sock.c:2613
unix_destruct_scm+0x138/0x190 net/unix/af_unix.c:1879
skb_release_head_state+0xa6/0x290 net/core/skbuff.c:1087
skb_release_all net/core/skbuff.c:1098 [inline]
__kfree_skb net/core/skbuff.c:1114 [inline]
sk_skb_reason_drop+0xeb/0x1a0 net/core/skbuff.c:1152
kfree_skb_reason include/linux/skbuff.h:1271 [inline]
unix_release_sock+0x789/0x1210 net/unix/af_unix.c:721
unix_release+0x91/0xf0 net/unix/af_unix.c:1106
__sock_release+0xb3/0x270 net/socket.c:647
sock_close+0x1c/0x30 net/socket.c:1398
__fput+0x402/0xb70 fs/file_table.c:464
task_work_run+0x151/0x250 kernel/task_work.c:227
get_signal+0x1d3/0x26c0 kernel/signal.c:2809
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888023369f20
which belongs to the cache kmalloc-16 of size 16
The buggy address is located 0 bytes inside of
freed 16-byte region [ffff888023369f20, ffff888023369f30)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x23369
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b041640 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000800080 00000000f5000000 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5837, tgid 5837 (syz-executor), ts 242189329938, free_ts 242098253989
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4740
alloc_slab_page mm/slub.c:2425 [inline]
allocate_slab mm/slub.c:2587 [inline]
new_slab+0x94/0x330 mm/slub.c:2640
___slab_alloc+0xc5d/0x1720 mm/slub.c:3826
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916
__slab_alloc_node mm/slub.c:3991 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__do_kmalloc_node mm/slub.c:4293 [inline]
__kmalloc_node_noprof+0x2f0/0x510 mm/slub.c:4300
__kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:665
xt_jumpstack_alloc net/netfilter/x_tables.c:1355 [inline]
xt_replace_table+0x1e3/0x940 net/netfilter/x_tables.c:1394
__do_replace+0x1d3/0x9e0 net/ipv4/netfilter/arp_tables.c:912
do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline]
do_ip6t_set_ctl+0x965/0xbf0 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x135/0x170 net/ipv6/ipv6_sockglue.c:998
tcp_setsockopt+0xa7/0x100 net/ipv4/tcp.c:4043
do_sock_setsockopt+0x225/0x480 net/socket.c:2303
__sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 7346 tgid 7337 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7b0 mm/mmu_gather.c:491
exit_mmap+0x40e/0xba0 mm/mmap.c:1297
__mmput+0x12a/0x410 kernel/fork.c:1356
mmput+0x62/0x70 kernel/fork.c:1378
exit_mm kernel/exit.c:570 [inline]
do_exit+0x9ba/0x2db0 kernel/exit.c:925
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x24ed/0x26c0 kernel/signal.c:3036
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888023369e00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff888023369e80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff888023369f00: fa fb fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc
^
ffff888023369f80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff88802336a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in iterate_bvec include/linux/iov_iter.h:120 [inline]
BUG: KASAN: slab-use-after-free in iterate_and_advance2 include/linux/iov_iter.h:304 [inline]
BUG: KASAN: slab-use-after-free in iterate_and_advance include/linux/iov_iter.h:328 [inline]
BUG: KASAN: slab-use-after-free in __copy_from_iter lib/iov_iter.c:249 [inline]
BUG: KASAN: slab-use-after-free in _copy_from_iter+0x14b4/0x1560 lib/iov_iter.c:260
Read of size 4 at addr ffff888023369f28 by task kworker/u8:3/53
CPU: 1 UID: 0 PID: 53 Comm: kworker/u8:3 Tainted: G B 6.14.0-rc7-syzkaller-00196-g88d324e69ea9 #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xd9/0x110 mm/kasan/report.c:634
iterate_bvec include/linux/iov_iter.h:120 [inline]
iterate_and_advance2 include/linux/iov_iter.h:304 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
__copy_from_iter lib/iov_iter.c:249 [inline]
_copy_from_iter+0x14b4/0x1560 lib/iov_iter.c:260
copy_from_iter include/linux/uio.h:228 [inline]
copy_from_iter_full include/linux/uio.h:245 [inline]
pdu_write_u net/9p/protocol.c:234 [inline]
p9pdu_vwritef+0x2d0/0x1cf0 net/9p/protocol.c:614
p9_client_prepare_req+0x244/0x4d0 net/9p/client.c:651
p9_client_rpc+0x1c3/0xc10 net/9p/client.c:691
p9_client_write+0x31f/0x680 net/9p/client.c:1645
v9fs_issue_write+0xe4/0x1b0 fs/9p/vfs_addr.c:59
netfs_do_issue_write+0x95/0x110 fs/netfs/write_issue.c:239
netfs_retry_write_stream fs/netfs/write_retry.c:46 [inline]
netfs_retry_writes+0x165a/0x1a00 fs/netfs/write_retry.c:231
netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
netfs_write_collection_worker+0x23de/0x37d0 fs/netfs/write_collect.c:374
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3400
kthread+0x3b2/0x750 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Allocated by task 7915:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_noprof+0x21c/0x510 mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
lsm_blob_alloc+0x68/0x90 security/security.c:684
lsm_sock_alloc security/security.c:4839 [inline]
security_sk_alloc+0x30/0x270 security/security.c:4855
sk_prot_alloc+0xfb/0x2a0 net/core/sock.c:2184
sk_alloc+0x36/0xc20 net/core/sock.c:2234
unix_create1+0xa6/0x6c0 net/unix/af_unix.c:1021
unix_create+0x10e/0x1d0 net/unix/af_unix.c:1091
__sock_create+0x338/0x8d0 net/socket.c:1548
sock_create net/socket.c:1606 [inline]
__sys_socketpair+0x25d/0x5a0 net/socket.c:1757
__do_sys_socketpair net/socket.c:1806 [inline]
__se_sys_socketpair net/socket.c:1803 [inline]
__x64_sys_socketpair+0x96/0x100 net/socket.c:1803
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 7921:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kfree+0x2c4/0x4d0 mm/slub.c:4757
security_sk_free+0x9d/0x1a0 security/security.c:4874
sk_prot_free net/core/sock.c:2213 [inline]
__sk_destruct+0x44d/0x6f0 net/core/sock.c:2312
sk_destruct+0xc2/0xf0 net/core/sock.c:2340
__sk_free+0xf4/0x3e0 net/core/sock.c:2351
sock_wfree+0x276/0x880 net/core/sock.c:2613
unix_destruct_scm+0x138/0x190 net/unix/af_unix.c:1879
skb_release_head_state+0xa6/0x290 net/core/skbuff.c:1087
skb_release_all net/core/skbuff.c:1098 [inline]
__kfree_skb net/core/skbuff.c:1114 [inline]
sk_skb_reason_drop+0xeb/0x1a0 net/core/skbuff.c:1152
kfree_skb_reason include/linux/skbuff.h:1271 [inline]
unix_release_sock+0x789/0x1210 net/unix/af_unix.c:721
unix_release+0x91/0xf0 net/unix/af_unix.c:1106
__sock_release+0xb3/0x270 net/socket.c:647
sock_close+0x1c/0x30 net/socket.c:1398
__fput+0x402/0xb70 fs/file_table.c:464
task_work_run+0x151/0x250 kernel/task_work.c:227
get_signal+0x1d3/0x26c0 kernel/signal.c:2809
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888023369f20
which belongs to the cache kmalloc-16 of size 16
The buggy address is located 8 bytes inside of
freed 16-byte region [ffff888023369f20, ffff888023369f30)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x23369
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b041640 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000800080 00000000f5000000 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5837, tgid 5837 (syz-executor), ts 242189329938, free_ts 242098253989
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4740
alloc_slab_page mm/slub.c:2425 [inline]
allocate_slab mm/slub.c:2587 [inline]
new_slab+0x94/0x330 mm/slub.c:2640
___slab_alloc+0xc5d/0x1720 mm/slub.c:3826
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916
__slab_alloc_node mm/slub.c:3991 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__do_kmalloc_node mm/slub.c:4293 [inline]
__kmalloc_node_noprof+0x2f0/0x510 mm/slub.c:4300
__kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:665
xt_jumpstack_alloc net/netfilter/x_tables.c:1355 [inline]
xt_replace_table+0x1e3/0x940 net/netfilter/x_tables.c:1394
__do_replace+0x1d3/0x9e0 net/ipv4/netfilter/arp_tables.c:912
do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline]
do_ip6t_set_ctl+0x965/0xbf0 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x135/0x170 net/ipv6/ipv6_sockglue.c:998
tcp_setsockopt+0xa7/0x100 net/ipv4/tcp.c:4043
do_sock_setsockopt+0x225/0x480 net/socket.c:2303
__sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 7346 tgid 7337 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7b0 mm/mmu_gather.c:491
exit_mmap+0x40e/0xba0 mm/mmap.c:1297
__mmput+0x12a/0x410 kernel/fork.c:1356
mmput+0x62/0x70 kernel/fork.c:1378
exit_mm kernel/exit.c:570 [inline]
do_exit+0x9ba/0x2db0 kernel/exit.c:925
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x24ed/0x26c0 kernel/signal.c:3036
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888023369e00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff888023369e80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff888023369f00: fa fb fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc
^
ffff888023369f80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff88802336a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: wild-memory-access in memcpy_from_iter lib/iov_iter.c:73 [inline]
BUG: KASAN: wild-memory-access in iterate_bvec include/linux/iov_iter.h:123 [inline]
BUG: KASAN: wild-memory-access in iterate_and_advance2 include/linux/iov_iter.h:304 [inline]
BUG: KASAN: wild-memory-access in iterate_and_advance include/linux/iov_iter.h:328 [inline]
BUG: KASAN: wild-memory-access in __copy_from_iter lib/iov_iter.c:249 [inline]
BUG: KASAN: wild-memory-access in _copy_from_iter+0x8a2/0x1560 lib/iov_iter.c:260
Read of size 11 at addr ffe7288c24167171 by task kworker/u8:3/53
CPU: 1 UID: 0 PID: 53 Comm: kworker/u8:3 Tainted: G B 6.14.0-rc7-syzkaller-00196-g88d324e69ea9 #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
kasan_report+0xd9/0x110 mm/kasan/report.c:634
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
__asan_memcpy+0x23/0x60 mm/kasan/shadow.c:105
memcpy_from_iter lib/iov_iter.c:73 [inline]
iterate_bvec include/linux/iov_iter.h:123 [inline]
iterate_and_advance2 include/linux/iov_iter.h:304 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
__copy_from_iter lib/iov_iter.c:249 [inline]
_copy_from_iter+0x8a2/0x1560 lib/iov_iter.c:260
copy_from_iter include/linux/uio.h:228 [inline]
copy_from_iter_full include/linux/uio.h:245 [inline]
pdu_write_u net/9p/protocol.c:234 [inline]
p9pdu_vwritef+0x2d0/0x1cf0 net/9p/protocol.c:614
p9_client_prepare_req+0x244/0x4d0 net/9p/client.c:651
p9_client_rpc+0x1c3/0xc10 net/9p/client.c:691
p9_client_write+0x31f/0x680 net/9p/client.c:1645
v9fs_issue_write+0xe4/0x1b0 fs/9p/vfs_addr.c:59
netfs_do_issue_write+0x95/0x110 fs/netfs/write_issue.c:239
netfs_retry_write_stream fs/netfs/write_retry.c:46 [inline]
netfs_retry_writes+0x165a/0x1a00 fs/netfs/write_retry.c:231
netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
netfs_write_collection_worker+0x23de/0x37d0 fs/netfs/write_collect.c:374
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3400
kthread+0x3b2/0x750 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in iterate_bvec include/linux/iov_iter.h:129 [inline]
BUG: KASAN: slab-use-after-free in iterate_and_advance2 include/linux/iov_iter.h:304 [inline]
BUG: KASAN: slab-use-after-free in iterate_and_advance include/linux/iov_iter.h:328 [inline]
BUG: KASAN: slab-use-after-free in __copy_from_iter lib/iov_iter.c:249 [inline]
BUG: KASAN: slab-use-after-free in _copy_from_iter+0x13e3/0x1560 lib/iov_iter.c:260
Read of size 4 at addr ffff888023369f28 by task kworker/u8:3/53
CPU: 1 UID: 0 PID: 53 Comm: kworker/u8:3 Tainted: G B 6.14.0-rc7-syzkaller-00196-g88d324e69ea9 #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xd9/0x110 mm/kasan/report.c:634
iterate_bvec include/linux/iov_iter.h:129 [inline]
iterate_and_advance2 include/linux/iov_iter.h:304 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
__copy_from_iter lib/iov_iter.c:249 [inline]
_copy_from_iter+0x13e3/0x1560 lib/iov_iter.c:260
copy_from_iter include/linux/uio.h:228 [inline]
copy_from_iter_full include/linux/uio.h:245 [inline]
pdu_write_u net/9p/protocol.c:234 [inline]
p9pdu_vwritef+0x2d0/0x1cf0 net/9p/protocol.c:614
p9_client_prepare_req+0x244/0x4d0 net/9p/client.c:651
p9_client_rpc+0x1c3/0xc10 net/9p/client.c:691
p9_client_write+0x31f/0x680 net/9p/client.c:1645
v9fs_issue_write+0xe4/0x1b0 fs/9p/vfs_addr.c:59
netfs_do_issue_write+0x95/0x110 fs/netfs/write_issue.c:239
netfs_retry_write_stream fs/netfs/write_retry.c:46 [inline]
netfs_retry_writes+0x165a/0x1a00 fs/netfs/write_retry.c:231
netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
netfs_write_collection_worker+0x23de/0x37d0 fs/netfs/write_collect.c:374
process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3400
kthread+0x3b2/0x750 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Allocated by task 7915:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_noprof+0x21c/0x510 mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
lsm_blob_alloc+0x68/0x90 security/security.c:684
lsm_sock_alloc security/security.c:4839 [inline]
security_sk_alloc+0x30/0x270 security/security.c:4855
sk_prot_alloc+0xfb/0x2a0 net/core/sock.c:2184
sk_alloc+0x36/0xc20 net/core/sock.c:2234
unix_create1+0xa6/0x6c0 net/unix/af_unix.c:1021
unix_create+0x10e/0x1d0 net/unix/af_unix.c:1091
__sock_create+0x338/0x8d0 net/socket.c:1548
sock_create net/socket.c:1606 [inline]
__sys_socketpair+0x25d/0x5a0 net/socket.c:1757
__do_sys_socketpair net/socket.c:1806 [inline]
__se_sys_socketpair net/socket.c:1803 [inline]
__x64_sys_socketpair+0x96/0x100 net/socket.c:1803
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 7921:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kfree+0x2c4/0x4d0 mm/slub.c:4757
security_sk_free+0x9d/0x1a0 security/security.c:4874
sk_prot_free net/core/sock.c:2213 [inline]
__sk_destruct+0x44d/0x6f0 net/core/sock.c:2312
sk_destruct+0xc2/0xf0 net/core/sock.c:2340
__sk_free+0xf4/0x3e0 net/core/sock.c:2351
sock_wfree+0x276/0x880 net/core/sock.c:2613
unix_destruct_scm+0x138/0x190 net/unix/af_unix.c:1879
skb_release_head_state+0xa6/0x290 net/core/skbuff.c:1087
skb_release_all net/core/skbuff.c:1098 [inline]
__kfree_skb net/core/skbuff.c:1114 [inline]
sk_skb_reason_drop+0xeb/0x1a0 net/core/skbuff.c:1152
kfree_skb_reason include/linux/skbuff.h:1271 [inline]
unix_release_sock+0x789/0x1210 net/unix/af_unix.c:721
unix_release+0x91/0xf0 net/unix/af_unix.c:1106
__sock_release+0xb3/0x270 net/socket.c:647
sock_close+0x1c/0x30 net/socket.c:1398
__fput+0x402/0xb70 fs/file_table.c:464
task_work_run+0x151/0x250 kernel/task_work.c:227
get_signal+0x1d3/0x26c0 kernel/signal.c:2809
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888023369f20
which belongs to the cache kmalloc-16 of size 16
The buggy address is located 8 bytes inside of
freed 16-byte region [ffff888023369f20, ffff888023369f30)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x23369
anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b041640 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000800080 00000000f5000000 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5837, tgid 5837 (syz-executor), ts 242189329938, free_ts 242098253989
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4740
alloc_slab_page mm/slub.c:2425 [inline]
allocate_slab mm/slub.c:2587 [inline]
new_slab+0x94/0x330 mm/slub.c:2640
___slab_alloc+0xc5d/0x1720 mm/slub.c:3826
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916
__slab_alloc_node mm/slub.c:3991 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__do_kmalloc_node mm/slub.c:4293 [inline]
__kmalloc_node_noprof+0x2f0/0x510 mm/slub.c:4300
__kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:665
xt_jumpstack_alloc net/netfilter/x_tables.c:1355 [inline]
xt_replace_table+0x1e3/0x940 net/netfilter/x_tables.c:1394
__do_replace+0x1d3/0x9e0 net/ipv4/netfilter/arp_tables.c:912
do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline]
do_ip6t_set_ctl+0x965/0xbf0 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x135/0x170 net/ipv6/ipv6_sockglue.c:998
tcp_setsockopt+0xa7/0x100 net/ipv4/tcp.c:4043
do_sock_setsockopt+0x225/0x480 net/socket.c:2303
__sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 7346 tgid 7337 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x237/0x7b0 mm/mmu_gather.c:491
exit_mmap+0x40e/0xba0 mm/mmap.c:1297
__mmput+0x12a/0x410 kernel/fork.c:1356
mmput+0x62/0x70 kernel/fork.c:1378
exit_mm kernel/exit.c:570 [inline]
do_exit+0x9ba/0x2db0 kernel/exit.c:925
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x24ed/0x26c0 kernel/signal.c:3036
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888023369e00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff888023369e80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff888023369f00: fa fb fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc
^
ffff888023369f80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff88802336a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================