==================================================================
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 ffff88807dd945d8 by task kworker/u8:1/12

CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.14.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
 <TASK>
 __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:378 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:489
 kasan_report+0xd9/0x110 mm/kasan/report.c:602
 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:229
 netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
 netfs_write_collection_worker+0x23de/0x37c0 fs/netfs/write_collect.c:374
 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 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
 </TASK>

Allocated by task 5832:
 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]
 xt_jumpstack_alloc net/netfilter/x_tables.c:1335 [inline]
 xt_replace_table+0x633/0x940 net/netfilter/x_tables.c:1394
 __do_replace+0x1d3/0x9d0 net/ipv4/netfilter/ip_tables.c:1064
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0x956/0xbe0 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
 __do_sys_setsockopt net/socket.c:2334 [inline]
 __se_sys_setsockopt net/socket.c:2331 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2331
 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

The buggy address belongs to the object at ffff88807dd945c0
 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 [ffff88807dd945c0, ffff88807dd945d0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88807dd94540 pfn:0x7dd94
anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b041640 0000000000000000 dead000000000001
raw: ffff88807dd94540 0000000080800068 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 7667, tgid 7667 (syz-executor), ts 281856700523, free_ts 281847629422
 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:4739
 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:662
 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 8928 tgid 8928 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
 __put_partials+0x14c/0x170 mm/slub.c:3153
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_lru_noprof+0x226/0x3d0 mm/slub.c:4183
 proc_alloc_inode+0x25/0x200 fs/proc/inode.c:57
 alloc_inode+0x60/0x230 fs/inode.c:336
 new_inode_pseudo fs/inode.c:1174 [inline]
 new_inode+0x22/0x210 fs/inode.c:1193
 proc_pid_make_inode+0x22/0x160 fs/proc/base.c:1950
 proc_pident_instantiate+0x85/0x320 fs/proc/base.c:2699
 proc_pident_lookup+0x226/0x2a0 fs/proc/base.c:2735
 lookup_open.isra.0+0x4dc/0x1580 fs/namei.c:3629
 open_last_lookups fs/namei.c:3750 [inline]
 path_openat+0x904/0x2d80 fs/namei.c:3986
 do_filp_open+0x20c/0x470 fs/namei.c:4016
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1428

Memory state around the buggy address:
 ffff88807dd94480: fa fb fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc
 ffff88807dd94500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff88807dd94580: fa fb fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc
                                                    ^
 ffff88807dd94600: fa fb fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
 ffff88807dd94680: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
==================================================================
==================================================================
BUG: KASAN: slab-out-of-bounds in iov_iter_bvec_advance lib/iov_iter.c:504 [inline]
BUG: KASAN: slab-out-of-bounds in iov_iter_advance+0x652/0x6c0 lib/iov_iter.c:576
Read of size 4 at addr ffff88807dd945d8 by task kworker/u8:1/12

CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:1 Tainted: G    B              6.14.0-rc2-syzkaller #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
 <TASK>
 __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:378 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:489
 kasan_report+0xd9/0x110 mm/kasan/report.c:602
 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:229
 netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
 netfs_write_collection_worker+0x23de/0x37c0 fs/netfs/write_collect.c:374
 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 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
 </TASK>

Allocated by task 5832:
 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]
 xt_jumpstack_alloc net/netfilter/x_tables.c:1335 [inline]
 xt_replace_table+0x633/0x940 net/netfilter/x_tables.c:1394
 __do_replace+0x1d3/0x9d0 net/ipv4/netfilter/ip_tables.c:1064
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0x956/0xbe0 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
 __do_sys_setsockopt net/socket.c:2334 [inline]
 __se_sys_setsockopt net/socket.c:2331 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2331
 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

The buggy address belongs to the object at ffff88807dd945c0
 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 [ffff88807dd945c0, ffff88807dd945d0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7dd94
anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b041640 0000000000000000 dead000000000001
raw: 0000000000000000 0000000080800080 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 7667, tgid 7667 (syz-executor), ts 281856700523, free_ts 281847629422
 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:4739
 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:662
 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 8928 tgid 8928 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
 __put_partials+0x14c/0x170 mm/slub.c:3153
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_lru_noprof+0x226/0x3d0 mm/slub.c:4183
 proc_alloc_inode+0x25/0x200 fs/proc/inode.c:57
 alloc_inode+0x60/0x230 fs/inode.c:336
 new_inode_pseudo fs/inode.c:1174 [inline]
 new_inode+0x22/0x210 fs/inode.c:1193
 proc_pid_make_inode+0x22/0x160 fs/proc/base.c:1950
 proc_pident_instantiate+0x85/0x320 fs/proc/base.c:2699
 proc_pident_lookup+0x226/0x2a0 fs/proc/base.c:2735
 lookup_open.isra.0+0x4dc/0x1580 fs/namei.c:3629
 open_last_lookups fs/namei.c:3750 [inline]
 path_openat+0x904/0x2d80 fs/namei.c:3986
 do_filp_open+0x20c/0x470 fs/namei.c:4016
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1428

Memory state around the buggy address:
 ffff88807dd94480: fa fb fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc
 ffff88807dd94500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff88807dd94580: fa fb fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc
                                                    ^
 ffff88807dd94600: fa fb fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
 ffff88807dd94680: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
==================================================================
==================================================================
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 ffff88807dd945cc by task kworker/u8:1/12

CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:1 Tainted: G    B              6.14.0-rc2-syzkaller #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
 <TASK>
 __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:378 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:489
 kasan_report+0xd9/0x110 mm/kasan/report.c:602
 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:229
 netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
 netfs_write_collection_worker+0x23de/0x37c0 fs/netfs/write_collect.c:374
 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 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
 </TASK>

Allocated by task 5832:
 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]
 xt_jumpstack_alloc net/netfilter/x_tables.c:1335 [inline]
 xt_replace_table+0x633/0x940 net/netfilter/x_tables.c:1394
 __do_replace+0x1d3/0x9d0 net/ipv4/netfilter/ip_tables.c:1064
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0x956/0xbe0 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
 __do_sys_setsockopt net/socket.c:2334 [inline]
 __se_sys_setsockopt net/socket.c:2331 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2331
 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 5832:
 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
 kvfree+0x47/0x50 mm/util.c:705
 xt_free_table_info+0x18a/0x220 net/netfilter/x_tables.c:1210
 __do_replace+0x75b/0x9d0 net/ipv4/netfilter/ip_tables.c:1084
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0x956/0xbe0 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
 __do_sys_setsockopt net/socket.c:2334 [inline]
 __se_sys_setsockopt net/socket.c:2331 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2331
 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

The buggy address belongs to the object at ffff88807dd945c0
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 12 bytes inside of
 freed 16-byte region [ffff88807dd945c0, ffff88807dd945d0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7dd94
anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b041640 0000000000000000 dead000000000001
raw: 0000000000000000 0000000080800080 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 7667, tgid 7667 (syz-executor), ts 281856700523, free_ts 281847629422
 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:4739
 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:662
 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 8928 tgid 8928 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
 __put_partials+0x14c/0x170 mm/slub.c:3153
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_lru_noprof+0x226/0x3d0 mm/slub.c:4183
 proc_alloc_inode+0x25/0x200 fs/proc/inode.c:57
 alloc_inode+0x60/0x230 fs/inode.c:336
 new_inode_pseudo fs/inode.c:1174 [inline]
 new_inode+0x22/0x210 fs/inode.c:1193
 proc_pid_make_inode+0x22/0x160 fs/proc/base.c:1950
 proc_pident_instantiate+0x85/0x320 fs/proc/base.c:2699
 proc_pident_lookup+0x226/0x2a0 fs/proc/base.c:2735
 lookup_open.isra.0+0x4dc/0x1580 fs/namei.c:3629
 open_last_lookups fs/namei.c:3750 [inline]
 path_openat+0x904/0x2d80 fs/namei.c:3986
 do_filp_open+0x20c/0x470 fs/namei.c:4016
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1428

Memory state around the buggy address:
 ffff88807dd94480: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
 ffff88807dd94500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff88807dd94580: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc
                                              ^
 ffff88807dd94600: fa fb fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
 ffff88807dd94680: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
==================================================================
==================================================================
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 ffff88807dd945c0 by task kworker/u8:1/12

CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:1 Tainted: G    B              6.14.0-rc2-syzkaller #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
 <TASK>
 __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:378 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:489
 kasan_report+0xd9/0x110 mm/kasan/report.c:602
 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:229
 netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
 netfs_write_collection_worker+0x23de/0x37c0 fs/netfs/write_collect.c:374
 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 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
 </TASK>

Allocated by task 5832:
 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]
 xt_jumpstack_alloc net/netfilter/x_tables.c:1335 [inline]
 xt_replace_table+0x633/0x940 net/netfilter/x_tables.c:1394
 __do_replace+0x1d3/0x9d0 net/ipv4/netfilter/ip_tables.c:1064
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0x956/0xbe0 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
 __do_sys_setsockopt net/socket.c:2334 [inline]
 __se_sys_setsockopt net/socket.c:2331 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2331
 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 5832:
 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
 kvfree+0x47/0x50 mm/util.c:705
 xt_free_table_info+0x18a/0x220 net/netfilter/x_tables.c:1210
 __do_replace+0x75b/0x9d0 net/ipv4/netfilter/ip_tables.c:1084
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0x956/0xbe0 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
 __do_sys_setsockopt net/socket.c:2334 [inline]
 __se_sys_setsockopt net/socket.c:2331 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2331
 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

The buggy address belongs to the object at ffff88807dd945c0
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 0 bytes inside of
 freed 16-byte region [ffff88807dd945c0, ffff88807dd945d0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7dd94
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 7667, tgid 7667 (syz-executor), ts 281856700523, free_ts 281847629422
 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:4739
 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:662
 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 8928 tgid 8928 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
 __put_partials+0x14c/0x170 mm/slub.c:3153
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_lru_noprof+0x226/0x3d0 mm/slub.c:4183
 proc_alloc_inode+0x25/0x200 fs/proc/inode.c:57
 alloc_inode+0x60/0x230 fs/inode.c:336
 new_inode_pseudo fs/inode.c:1174 [inline]
 new_inode+0x22/0x210 fs/inode.c:1193
 proc_pid_make_inode+0x22/0x160 fs/proc/base.c:1950
 proc_pident_instantiate+0x85/0x320 fs/proc/base.c:2699
 proc_pident_lookup+0x226/0x2a0 fs/proc/base.c:2735
 lookup_open.isra.0+0x4dc/0x1580 fs/namei.c:3629
 open_last_lookups fs/namei.c:3750 [inline]
 path_openat+0x904/0x2d80 fs/namei.c:3986
 do_filp_open+0x20c/0x470 fs/namei.c:4016
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1428

Memory state around the buggy address:
 ffff88807dd94480: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
 ffff88807dd94500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff88807dd94580: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc
                                           ^
 ffff88807dd94600: fa fb fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
 ffff88807dd94680: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
==================================================================
==================================================================
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 ffff88807dd945c8 by task kworker/u8:1/12

CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:1 Tainted: G    B              6.14.0-rc2-syzkaller #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
 <TASK>
 __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:378 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:489
 kasan_report+0xd9/0x110 mm/kasan/report.c:602
 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:229
 netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
 netfs_write_collection_worker+0x23de/0x37c0 fs/netfs/write_collect.c:374
 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 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
 </TASK>

Allocated by task 5832:
 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]
 xt_jumpstack_alloc net/netfilter/x_tables.c:1335 [inline]
 xt_replace_table+0x633/0x940 net/netfilter/x_tables.c:1394
 __do_replace+0x1d3/0x9d0 net/ipv4/netfilter/ip_tables.c:1064
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0x956/0xbe0 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
 __do_sys_setsockopt net/socket.c:2334 [inline]
 __se_sys_setsockopt net/socket.c:2331 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2331
 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 5832:
 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
 kvfree+0x47/0x50 mm/util.c:705
 xt_free_table_info+0x18a/0x220 net/netfilter/x_tables.c:1210
 __do_replace+0x75b/0x9d0 net/ipv4/netfilter/ip_tables.c:1084
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0x956/0xbe0 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
 __do_sys_setsockopt net/socket.c:2334 [inline]
 __se_sys_setsockopt net/socket.c:2331 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2331
 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

The buggy address belongs to the object at ffff88807dd945c0
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 8 bytes inside of
 freed 16-byte region [ffff88807dd945c0, ffff88807dd945d0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7dd94
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 7667, tgid 7667 (syz-executor), ts 281856700523, free_ts 281847629422
 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:4739
 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:662
 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 8928 tgid 8928 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
 __put_partials+0x14c/0x170 mm/slub.c:3153
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_lru_noprof+0x226/0x3d0 mm/slub.c:4183
 proc_alloc_inode+0x25/0x200 fs/proc/inode.c:57
 alloc_inode+0x60/0x230 fs/inode.c:336
 new_inode_pseudo fs/inode.c:1174 [inline]
 new_inode+0x22/0x210 fs/inode.c:1193
 proc_pid_make_inode+0x22/0x160 fs/proc/base.c:1950
 proc_pident_instantiate+0x85/0x320 fs/proc/base.c:2699
 proc_pident_lookup+0x226/0x2a0 fs/proc/base.c:2735
 lookup_open.isra.0+0x4dc/0x1580 fs/namei.c:3629
 open_last_lookups fs/namei.c:3750 [inline]
 path_openat+0x904/0x2d80 fs/namei.c:3986
 do_filp_open+0x20c/0x470 fs/namei.c:4016
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1428

Memory state around the buggy address:
 ffff88807dd94480: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
 ffff88807dd94500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff88807dd94580: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc
                                              ^
 ffff88807dd94600: fa fb fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
 ffff88807dd94680: fa fb fc fc fa fb fc fc fa fb fc fc fa fb 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+0x8a2/0x1560 lib/iov_iter.c:260
Read of size 177 at addr ffe7289f8d074b50 by task kworker/u8:1/12

CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:1 Tainted: G    B              6.14.0-rc2-syzkaller #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
 <TASK>
 __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:602
 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:229
 netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
 netfs_write_collection_worker+0x23de/0x37c0 fs/netfs/write_collect.c:374
 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 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
 </TASK>
==================================================================
==================================================================
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 ffff88807dd945c8 by task kworker/u8:1/12

CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:1 Tainted: G    B              6.14.0-rc2-syzkaller #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
 <TASK>
 __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:378 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:489
 kasan_report+0xd9/0x110 mm/kasan/report.c:602
 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:229
 netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
 netfs_write_collection_worker+0x23de/0x37c0 fs/netfs/write_collect.c:374
 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 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
 </TASK>

Allocated by task 5832:
 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]
 xt_jumpstack_alloc net/netfilter/x_tables.c:1335 [inline]
 xt_replace_table+0x633/0x940 net/netfilter/x_tables.c:1394
 __do_replace+0x1d3/0x9d0 net/ipv4/netfilter/ip_tables.c:1064
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0x956/0xbe0 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
 __do_sys_setsockopt net/socket.c:2334 [inline]
 __se_sys_setsockopt net/socket.c:2331 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2331
 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 5832:
 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
 kvfree+0x47/0x50 mm/util.c:705
 xt_free_table_info+0x18a/0x220 net/netfilter/x_tables.c:1210
 __do_replace+0x75b/0x9d0 net/ipv4/netfilter/ip_tables.c:1084
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0x956/0xbe0 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
 __do_sys_setsockopt net/socket.c:2334 [inline]
 __se_sys_setsockopt net/socket.c:2331 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2331
 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

The buggy address belongs to the object at ffff88807dd945c0
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 8 bytes inside of
 freed 16-byte region [ffff88807dd945c0, ffff88807dd945d0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7dd94
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 7667, tgid 7667 (syz-executor), ts 281856700523, free_ts 281847629422
 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:4739
 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:662
 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 8928 tgid 8928 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
 __put_partials+0x14c/0x170 mm/slub.c:3153
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_lru_noprof+0x226/0x3d0 mm/slub.c:4183
 proc_alloc_inode+0x25/0x200 fs/proc/inode.c:57
 alloc_inode+0x60/0x230 fs/inode.c:336
 new_inode_pseudo fs/inode.c:1174 [inline]
 new_inode+0x22/0x210 fs/inode.c:1193
 proc_pid_make_inode+0x22/0x160 fs/proc/base.c:1950
 proc_pident_instantiate+0x85/0x320 fs/proc/base.c:2699
 proc_pident_lookup+0x226/0x2a0 fs/proc/base.c:2735
 lookup_open.isra.0+0x4dc/0x1580 fs/namei.c:3629
 open_last_lookups fs/namei.c:3750 [inline]
 path_openat+0x904/0x2d80 fs/namei.c:3986
 do_filp_open+0x20c/0x470 fs/namei.c:4016
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1428

Memory state around the buggy address:
 ffff88807dd94480: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
 ffff88807dd94500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff88807dd94580: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc
                                              ^
 ffff88807dd94600: fa fb fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
 ffff88807dd94680: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
==================================================================
==================================================================
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+0x443/0x5a0 lib/iov_iter.c:611
Read of size 4 at addr ffff88807dd945c8 by task kworker/u8:1/12

CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:1 Tainted: G    B              6.14.0-rc2-syzkaller #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound netfs_write_collection_worker
Call Trace:
 <TASK>
 __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:378 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:489
 kasan_report+0xd9/0x110 mm/kasan/report.c:602
 iov_iter_revert lib/iov_iter.c:633 [inline]
 iov_iter_revert+0x443/0x5a0 lib/iov_iter.c:611
 p9_client_write+0x48a/0x680 net/9p/client.c:1649
 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:229
 netfs_collect_write_results fs/netfs/write_collect.c:352 [inline]
 netfs_write_collection_worker+0x23de/0x37c0 fs/netfs/write_collect.c:374
 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 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
 </TASK>

Allocated by task 5832:
 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]
 xt_jumpstack_alloc net/netfilter/x_tables.c:1335 [inline]
 xt_replace_table+0x633/0x940 net/netfilter/x_tables.c:1394
 __do_replace+0x1d3/0x9d0 net/ipv4/netfilter/ip_tables.c:1064
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0x956/0xbe0 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
 __do_sys_setsockopt net/socket.c:2334 [inline]
 __se_sys_setsockopt net/socket.c:2331 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2331
 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 5832:
 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
 kvfree+0x47/0x50 mm/util.c:705
 xt_free_table_info+0x18a/0x220 net/netfilter/x_tables.c:1210
 __do_replace+0x75b/0x9d0 net/ipv4/netfilter/ip_tables.c:1084
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0x956/0xbe0 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
 __do_sys_setsockopt net/socket.c:2334 [inline]
 __se_sys_setsockopt net/socket.c:2331 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2331
 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

The buggy address belongs to the object at ffff88807dd945c0
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 8 bytes inside of
 freed 16-byte region [ffff88807dd945c0, ffff88807dd945d0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7dd94
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 7667, tgid 7667 (syz-executor), ts 281856700523, free_ts 281847629422
 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:4739
 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:662
 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:4030
 do_sock_setsockopt+0x225/0x480 net/socket.c:2303
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2328
page last free pid 8928 tgid 8928 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
 __put_partials+0x14c/0x170 mm/slub.c:3153
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_lru_noprof+0x226/0x3d0 mm/slub.c:4183
 proc_alloc_inode+0x25/0x200 fs/proc/inode.c:57
 alloc_inode+0x60/0x230 fs/inode.c:336
 new_inode_pseudo fs/inode.c:1174 [inline]
 new_inode+0x22/0x210 fs/inode.c:1193
 proc_pid_make_inode+0x22/0x160 fs/proc/base.c:1950
 proc_pident_instantiate+0x85/0x320 fs/proc/base.c:2699
 proc_pident_lookup+0x226/0x2a0 fs/proc/base.c:2735
 lookup_open.isra.0+0x4dc/0x1580 fs/namei.c:3629
 open_last_lookups fs/namei.c:3750 [inline]
 path_openat+0x904/0x2d80 fs/namei.c:3986
 do_filp_open+0x20c/0x470 fs/namei.c:4016
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1428

Memory state around the buggy address:
 ffff88807dd94480: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
 ffff88807dd94500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
>ffff88807dd94580: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc
                                              ^
 ffff88807dd94600: fa fb fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
 ffff88807dd94680: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
==================================================================