==================================================================
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 ffff88806001c698 by task kworker/u8:3/53
CPU: 1 UID: 0 PID: 53 Comm: kworker/u8:3 Not tainted 6.15.0-rc6-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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+0xe0/0x110 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+0x166d/0x1a50 fs/netfs/write_retry.c:231
netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
netfs_write_collection_worker+0x23fd/0x3830 fs/netfs/write_collect.c:374
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 14182:
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:4327 [inline]
__kmalloc_noprof+0x223/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [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:2201
sk_alloc+0x36/0xc20 net/core/sock.c:2254
inet6_create net/ipv6/af_inet6.c:193 [inline]
inet6_create+0x381/0x1300 net/ipv6/af_inet6.c:120
__sock_create+0x338/0x8d0 net/socket.c:1541
inet_ctl_sock_create+0x94/0x230 net/ipv4/af_inet.c:1637
ndisc_net_init+0x89/0x250 net/ipv6/ndisc.c:2003
ops_init+0x1e2/0x5f0 net/core/net_namespace.c:138
setup_net+0x21e/0x850 net/core/net_namespace.c:364
copy_net_ns+0x2a6/0x5f0 net/core/net_namespace.c:518
create_new_namespaces+0x3ea/0xad0 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0xc0/0x1f0 kernel/nsproxy.c:228
ksys_unshare+0x45b/0xa40 kernel/fork.c:3375
__do_sys_unshare kernel/fork.c:3446 [inline]
__se_sys_unshare kernel/fork.c:3444 [inline]
__x64_sys_unshare+0x31/0x40 kernel/fork.c:3444
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88806001c680
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 [ffff88806001c680, ffff88806001c690)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6001c
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b441640 ffffea00019b0240 dead000000000002
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 5822, tgid 5822 (syz-executor), ts 976723827952, free_ts 976712373677
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1718
prep_new_page mm/page_alloc.c:1726 [inline]
get_page_from_freelist+0x135c/0x3920 mm/page_alloc.c:3688
__alloc_frozen_pages_noprof+0x263/0x23a0 mm/page_alloc.c:4970
alloc_slab_page mm/slub.c:2452 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x94/0x340 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kvmalloc_node_noprof+0x3a6/0x600 mm/slub.c:5012
xt_jumpstack_alloc net/netfilter/x_tables.c:1355 [inline]
xt_replace_table+0x1e3/0x950 net/netfilter/x_tables.c:1394
__do_replace+0x1cf/0x9f0 net/ipv4/netfilter/arp_tables.c:912
do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline]
do_ip6t_set_ctl+0x87c/0xb00 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:4077
do_sock_setsockopt+0x224/0x470 net/socket.c:2296
__sys_setsockopt+0x1a0/0x230 net/socket.c:2321
__do_sys_setsockopt net/socket.c:2327 [inline]
__se_sys_setsockopt net/socket.c:2324 [inline]
__x64_sys_setsockopt+0xbd/0x160 net/socket.c:2324
page last free pid 5890 tgid 5890 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1262 [inline]
__free_frozen_pages+0x69d/0xff0 mm/page_alloc.c:2725
vfree+0x176/0x960 mm/vmalloc.c:3384
delayed_vfree_work+0x56/0x70 mm/vmalloc.c:3304
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff88806001c580: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff88806001c600: 00 00 fc fc 00 05 fc fc 00 06 fc fc 00 00 fc fc
>ffff88806001c680: 00 00 fc fc 00 00 fc fc 00 00 fc fc fa fb fc fc
^
ffff88806001c700: 00 00 fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
ffff88806001c780: 00 00 fc fc 00 00 fc fc fa fb fc fc 00 00 fc fc
==================================================================
==================================================================
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+0x521/0x5a0 lib/iov_iter.c:611
Read of size 4 at addr ffff88806001c678 by task kworker/u8:3/53
CPU: 0 UID: 0 PID: 53 Comm: kworker/u8:3 Tainted: G B 6.15.0-rc6-syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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+0xe0/0x110 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+0x166d/0x1a50 fs/netfs/write_retry.c:231
netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
netfs_write_collection_worker+0x23fd/0x3830 fs/netfs/write_collect.c:374
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 5827:
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:4327 [inline]
__kmalloc_noprof+0x223/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
xt_jumpstack_alloc net/netfilter/x_tables.c:1335 [inline]
xt_replace_table+0x641/0x950 net/netfilter/x_tables.c:1394
__do_replace+0x1cf/0x9e0 net/ipv4/netfilter/ip_tables.c:1064
do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
do_ipt_set_ctl+0x86d/0xae0 net/ipv4/netfilter/ip_tables.c:1635
nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101
ip_setsockopt+0xcb/0xf0 net/ipv4/ip_sockglue.c:1424
tcp_setsockopt+0xa7/0x100 net/ipv4/tcp.c:4077
do_sock_setsockopt+0x224/0x470 net/socket.c:2296
__sys_setsockopt+0x1a0/0x230 net/socket.c:2321
__do_sys_setsockopt net/socket.c:2327 [inline]
__se_sys_setsockopt net/socket.c:2324 [inline]
__x64_sys_setsockopt+0xbd/0x160 net/socket.c:2324
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88806001c660
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 [ffff88806001c660, ffff88806001c670)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6001c
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b441640 ffffea00019b0240 dead000000000002
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 5822, tgid 5822 (syz-executor), ts 976723827952, free_ts 976712373677
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1718
prep_new_page mm/page_alloc.c:1726 [inline]
get_page_from_freelist+0x135c/0x3920 mm/page_alloc.c:3688
__alloc_frozen_pages_noprof+0x263/0x23a0 mm/page_alloc.c:4970
alloc_slab_page mm/slub.c:2452 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x94/0x340 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kvmalloc_node_noprof+0x3a6/0x600 mm/slub.c:5012
xt_jumpstack_alloc net/netfilter/x_tables.c:1355 [inline]
xt_replace_table+0x1e3/0x950 net/netfilter/x_tables.c:1394
__do_replace+0x1cf/0x9f0 net/ipv4/netfilter/arp_tables.c:912
do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline]
do_ip6t_set_ctl+0x87c/0xb00 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:4077
do_sock_setsockopt+0x224/0x470 net/socket.c:2296
__sys_setsockopt+0x1a0/0x230 net/socket.c:2321
__do_sys_setsockopt net/socket.c:2327 [inline]
__se_sys_setsockopt net/socket.c:2324 [inline]
__x64_sys_setsockopt+0xbd/0x160 net/socket.c:2324
page last free pid 5890 tgid 5890 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1262 [inline]
__free_frozen_pages+0x69d/0xff0 mm/page_alloc.c:2725
vfree+0x176/0x960 mm/vmalloc.c:3384
delayed_vfree_work+0x56/0x70 mm/vmalloc.c:3304
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff88806001c500: 00 03 fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
ffff88806001c580: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff88806001c600: 00 00 fc fc 00 05 fc fc fa fb fc fc 00 00 fc fc
^
ffff88806001c680: 00 00 fc fc 00 00 fc fc 00 00 fc fc fa fb fc fc
ffff88806001c700: 00 00 fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
==================================================================
==================================================================
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+0x8c9/0x15b0 lib/iov_iter.c:260
Read of size 2 at addr ffe7289960721a68 by task kworker/u8:3/53
CPU: 0 UID: 0 PID: 53 Comm: kworker/u8:3 Tainted: G B 6.15.0-rc6-syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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+0xe0/0x110 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+0x8c9/0x15b0 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+0x2da/0x1d30 net/9p/protocol.c:614
p9_client_prepare_req+0x247/0x4d0 net/9p/client.c:651
p9_client_rpc+0x1c4/0xc50 net/9p/client.c:691
p9_client_write+0x245/0x6f0 net/9p/client.c:1648
v9fs_issue_write+0xe3/0x1b0 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+0x168a/0x1a50 fs/netfs/write_retry.c:231
netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
netfs_write_collection_worker+0x23fd/0x3830 fs/netfs/write_collect.c:374
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
==================================================================