================================================================== BUG: KASAN: slab-out-of-bounds in _copy_to_iter+0xd54/0x1180 lib/iov_iter.c:527 Write of size 233 at addr ffff88807610eb07 by task kworker/1:2/4561 CPU: 1 PID: 4561 Comm: kworker/1:2 Not tainted 6.1.0-rc5-next-20221116-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events p9_read_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:253 [inline] print_report+0x15e/0x45d mm/kasan/report.c:364 kasan_report+0xbf/0x1f0 mm/kasan/report.c:464 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x141/0x190 mm/kasan/generic.c:189 memcpy+0x3d/0x60 mm/kasan/shadow.c:66 _copy_to_iter+0xd54/0x1180 lib/iov_iter.c:527 copy_page_to_iter+0xe0/0xa20 lib/iov_iter.c:725 pipe_read+0x50e/0x1110 fs/pipe.c:307 __kernel_read+0x2ca/0x7c0 fs/read_write.c:428 kernel_read+0xc3/0x1c0 fs/read_write.c:446 p9_fd_read net/9p/trans_fd.c:266 [inline] p9_read_work+0x2b0/0x1040 net/9p/trans_fd.c:301 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 13901: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:376 [inline] ____kasan_kmalloc mm/kasan/common.c:335 [inline] __kasan_kmalloc+0xa5/0xb0 mm/kasan/common.c:385 kasan_kmalloc include/linux/kasan.h:212 [inline] __do_kmalloc_node mm/slab_common.c:955 [inline] __kmalloc+0x5a/0xd0 mm/slab_common.c:968 kmalloc include/linux/slab.h:580 [inline] p9_fcall_init+0x97/0x210 net/9p/client.c:228 p9_tag_alloc+0x208/0x840 net/9p/client.c:293 p9_client_prepare_req+0x177/0x590 net/9p/client.c:631 p9_client_rpc+0x1a1/0xd70 net/9p/client.c:678 p9_client_walk+0x1a0/0x540 net/9p/client.c:1152 clone_fid fs/9p/fid.h:21 [inline] v9fs_fid_clone fs/9p/fid.h:31 [inline] v9fs_file_open+0x40c/0xbf0 fs/9p/vfs_file.c:60 do_dentry_open+0x6cc/0x13f0 fs/open.c:882 do_open fs/namei.c:3557 [inline] path_openat+0x1bbc/0x2a50 fs/namei.c:3713 do_filp_open+0x1ba/0x410 fs/namei.c:3740 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_open fs/open.c:1334 [inline] __se_sys_open fs/open.c:1330 [inline] __x64_sys_open+0x11d/0x1c0 fs/open.c:1330 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807610eb00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 7 bytes inside of 192-byte region [ffff88807610eb00, ffff88807610ebc0) The buggy address belongs to the physical page: page:ffffea0001d84380 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807610e600 pfn:0x7610e flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff888012441a00 ffffea000082a3c0 dead000000000002 raw: ffff88807610e600 000000008010000d 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 11105, tgid 11104 (syz-executor.2), ts 555069435291, free_ts 555003565148 prep_new_page mm/page_alloc.c:2561 [inline] get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4310 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5569 __alloc_pages_node include/linux/gfp.h:233 [inline] alloc_slab_page mm/slub.c:1835 [inline] allocate_slab+0xa6/0x350 mm/slub.c:1980 new_slab mm/slub.c:2033 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3211 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3310 slab_alloc_node mm/slub.c:3395 [inline] __kmem_cache_alloc_node+0x1a9/0x430 mm/slub.c:3472 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc_node+0x4d/0xd0 mm/slab_common.c:962 kmalloc_array_node include/linux/slab.h:688 [inline] kcalloc_node include/linux/slab.h:693 [inline] memcg_alloc_slab_cgroups+0x8f/0x150 mm/memcontrol.c:2889 account_slab mm/slab.h:645 [inline] allocate_slab+0x2a3/0x350 mm/slub.c:1998 new_slab mm/slub.c:2033 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3211 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3310 slab_alloc_node mm/slub.c:3395 [inline] slab_alloc mm/slub.c:3441 [inline] __kmem_cache_alloc_lru mm/slub.c:3448 [inline] kmem_cache_alloc+0x378/0x430 mm/slub.c:3457 sk_prot_alloc+0x5f/0x290 net/core/sock.c:2025 sk_alloc+0x3a/0x7a0 net/core/sock.c:2084 inet6_create net/ipv6/af_inet6.c:192 [inline] inet6_create+0x373/0x1030 net/ipv6/af_inet6.c:119 __sock_create+0x359/0x790 net/socket.c:1515 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1468 [inline] free_pcp_prepare+0x65c/0xc00 mm/page_alloc.c:1518 free_unref_page_prepare mm/page_alloc.c:3409 [inline] free_unref_page+0x1d/0x4d0 mm/page_alloc.c:3505 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2617 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x66/0x90 mm/kasan/common.c:307 kasan_slab_alloc include/linux/kasan.h:202 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3433 [inline] slab_alloc mm/slub.c:3441 [inline] __kmem_cache_alloc_lru mm/slub.c:3448 [inline] kmem_cache_alloc+0x1e3/0x430 mm/slub.c:3457 getname_flags.part.0+0x50/0x4f0 fs/namei.c:139 getname_flags include/linux/audit.h:320 [inline] getname+0x92/0xd0 fs/namei.c:218 do_sys_openat2+0xf5/0x4c0 fs/open.c:1304 do_sys_open fs/open.c:1326 [inline] __do_sys_open fs/open.c:1334 [inline] __se_sys_open fs/open.c:1330 [inline] __x64_sys_open+0x11d/0x1c0 fs/open.c:1330 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88807610ea80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88807610eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88807610eb80: 00 03 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807610ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807610ec80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================