loop1: detected capacity change from 0 to 2048 ================================================================== BUG: KASAN: use-after-free in nilfs_mdt_destroy+0x4f/0x70 fs/nilfs2/mdt.c:497 Read of size 8 at addr ffff88807d4b5c98 by task syz-executor.1/15097 CPU: 0 PID: 15097 Comm: syz-executor.1 Not tainted 6.0.0-rc7-syzkaller-00220-gffb4d94b4314 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:317 print_report+0x108/0x1f0 mm/kasan/report.c:433 kasan_report+0xc3/0xf0 mm/kasan/report.c:495 nilfs_mdt_destroy+0x4f/0x70 fs/nilfs2/mdt.c:497 nilfs_free_inode+0x44/0x70 fs/nilfs2/super.c:168 i_callback fs/inode.c:249 [inline] alloc_inode fs/inode.c:274 [inline] new_inode_pseudo+0x19a/0x1d0 fs/inode.c:1019 new_inode+0x25/0x1d0 fs/inode.c:1047 nilfs_new_inode+0xca/0x8a0 fs/nilfs2/inode.c:334 nilfs_create+0xdc/0x2d0 fs/nilfs2/namei.c:85 lookup_open fs/namei.c:3413 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x12d0/0x2df0 fs/namei.c:3688 do_filp_open+0x264/0x4f0 fs/namei.c:3718 do_sys_openat2+0x124/0x4e0 fs/open.c:1313 do_sys_open fs/open.c:1329 [inline] __do_sys_open fs/open.c:1337 [inline] __se_sys_open fs/open.c:1333 [inline] __x64_sys_open+0x221/0x270 fs/open.c:1333 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa99fe8a5a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa9a0f16168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fa99ffabf80 RCX: 00007fa99fe8a5a9 RDX: 0000000000000000 RSI: 000000000014d27e RDI: 0000000020000180 RBP: 00007fa9a0f161d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffce6594e1f R14: 00007fa9a0f16300 R15: 0000000000022000 Allocated by task 14852: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:437 [inline] ____kasan_kmalloc+0xcd/0x100 mm/kasan/common.c:516 kasan_kmalloc include/linux/kasan.h:234 [inline] __kmalloc+0x226/0x370 mm/slub.c:4429 kmalloc include/linux/slab.h:605 [inline] kzalloc include/linux/slab.h:733 [inline] nilfs_mdt_init+0x42/0x1c0 fs/nilfs2/mdt.c:451 nilfs_dat_read+0x136/0x300 fs/nilfs2/dat.c:489 nilfs_load_super_root fs/nilfs2/the_nilfs.c:120 [inline] load_nilfs+0x4c8/0xfc0 fs/nilfs2/the_nilfs.c:269 nilfs_fill_super+0x27e/0x5d0 fs/nilfs2/super.c:1059 nilfs_mount+0x613/0x9b0 fs/nilfs2/super.c:1317 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x2b/0x50 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 insert_work+0x54/0x3e0 kernel/workqueue.c:1358 __queue_work+0xa31/0xce0 kernel/workqueue.c:1517 call_timer_fn+0xf5/0x210 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1514 [inline] __run_timers+0x7a2/0x980 kernel/time/timer.c:1790 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803 __do_softirq+0x362/0x773 kernel/softirq.c:571 Second to last potentially related work creation: kasan_save_stack+0x2b/0x50 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 insert_work+0x54/0x3e0 kernel/workqueue.c:1358 __queue_work+0xa31/0xce0 kernel/workqueue.c:1517 call_timer_fn+0xf5/0x210 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1514 [inline] __run_timers+0x7a2/0x980 kernel/time/timer.c:1790 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803 __do_softirq+0x362/0x773 kernel/softirq.c:571 The buggy address belongs to the object at ffff88807d4b5c00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 152 bytes inside of 512-byte region [ffff88807d4b5c00, ffff88807d4b5e00) The buggy address belongs to the physical page: page:ffffea0001f52d00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807d4b5c00 pfn:0x7d4b4 head:ffffea0001f52d00 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00010e4c08 ffffea00010e3208 ffff888012041c80 raw: ffff88807d4b5c00 000000000010000d 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3186, tgid 3186 (dhcpcd), ts 23567142625, free_ts 23044142914 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_slab_page+0x70/0xf0 mm/slub.c:1829 allocate_slab+0x5e/0x520 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x3ee/0xc40 mm/slub.c:3036 __slab_alloc mm/slub.c:3123 [inline] slab_alloc_node mm/slub.c:3214 [inline] __kmalloc_node_track_caller+0x2c3/0x400 mm/slub.c:4964 kmalloc_reserve net/core/skbuff.c:362 [inline] __alloc_skb+0x112/0x2b0 net/core/skbuff.c:434 alloc_skb include/linux/skbuff.h:1257 [inline] nlmsg_new include/net/netlink.h:953 [inline] netlink_ack+0x353/0xb20 net/netlink/af_netlink.c:2436 netlink_rcv_skb+0x289/0x460 net/netlink/af_netlink.c:2507 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7e7/0x9c0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x9b3/0xcd0 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x5b4/0x940 net/socket.c:2482 ___sys_sendmsg net/socket.c:2536 [inline] __sys_sendmsg+0x23e/0x340 net/socket.c:2565 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3476 free_slab mm/slub.c:2073 [inline] discard_slab mm/slub.c:2079 [inline] __unfreeze_partials+0x1ab/0x200 mm/slub.c:2553 put_cpu_partial+0x106/0x170 mm/slub.c:2629 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:447 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:727 [inline] slab_alloc_node mm/slub.c:3248 [inline] slab_alloc mm/slub.c:3256 [inline] kmem_cache_alloc_trace+0x1de/0x310 mm/slub.c:3287 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] tomoyo_print_bprm security/tomoyo/audit.c:26 [inline] tomoyo_init_log+0xfd2/0x1f80 security/tomoyo/audit.c:264 tomoyo_supervisor+0x3b9/0x1470 security/tomoyo/common.c:2088 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x15b/0x1f0 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0x169e/0x1d80 security/tomoyo/domain.c:879 tomoyo_bprm_check_security+0xe3/0x130 security/tomoyo/tomoyo.c:101 security_bprm_check+0x50/0xb0 security/security.c:867 search_binary_handler fs/exec.c:1715 [inline] exec_binprm fs/exec.c:1768 [inline] bprm_execve+0x817/0x1590 fs/exec.c:1837 do_execveat_common+0x59b/0x750 fs/exec.c:1942 Memory state around the buggy address: ffff88807d4b5b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807d4b5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807d4b5c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807d4b5d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807d4b5d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================