fuse: Bad value for 'fd' ================================================================== BUG: KASAN: slab-out-of-bounds in iov_iter_revert+0x1c1/0x590 lib/iov_iter.c:633 Read of size 4 at addr ffff888042706578 by task syz.0.0/5320 CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted 6.14.0-rc7-syzkaller-00074-ga7f2e10ecd8f #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0x16e/0x5b0 mm/kasan/report.c:521 kasan_report+0x143/0x180 mm/kasan/report.c:634 iov_iter_revert+0x1c1/0x590 lib/iov_iter.c:633 p9_client_write+0x444/0x7a0 net/9p/client.c:1669 v9fs_issue_write+0xf0/0x1d0 fs/9p/vfs_addr.c:59 netfs_do_issue_write fs/netfs/write_issue.c:239 [inline] netfs_issue_write fs/netfs/write_issue.c:269 [inline] netfs_advance_write+0x97c/0xbd0 fs/netfs/write_issue.c:310 netfs_unbuffered_write+0x1b0/0x600 fs/netfs/write_issue.c:721 netfs_unbuffered_write_iter_locked+0x456/0x9f0 fs/netfs/direct_write.c:100 netfs_unbuffered_write_iter+0x4e1/0x6a0 fs/netfs/direct_write.c:195 do_iter_readv_writev+0x71a/0x9d0 vfs_writev+0x38b/0xbc0 fs/read_write.c:1050 do_writev+0x1b6/0x360 fs/read_write.c:1096 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f294798d169 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2948782038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007f2947ba5fa0 RCX: 00007f294798d169 RDX: 0000000000000002 RSI: 0000400000000000 RDI: 0000000000000008 RBP: 00007f2947a0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2947ba5fa0 R15: 00007fffb2830ba8 Allocated by task 5302: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_node_noprof+0x25d/0x3a0 mm/slub.c:4337 kmalloc_node_noprof include/linux/slab.h:924 [inline] __get_vm_area_node+0x132/0x2d0 mm/vmalloc.c:3127 __vmalloc_node_range_noprof+0x344/0x1380 mm/vmalloc.c:3806 __vmalloc_node_noprof mm/vmalloc.c:3911 [inline] vzalloc_noprof+0x79/0x90 mm/vmalloc.c:3984 alloc_counters+0xd7/0x770 net/ipv4/netfilter/ip_tables.c:799 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:821 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1022 [inline] do_ipt_get_ctl+0xf25/0x18b0 net/ipv4/netfilter/ip_tables.c:1668 nf_getsockopt+0x299/0x2c0 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x222/0x2e0 net/ipv4/ip_sockglue.c:1777 tcp_getsockopt+0x163/0x1c0 net/ipv4/tcp.c:4684 do_sock_getsockopt+0x38e/0x740 net/socket.c:2364 __sys_getsockopt net/socket.c:2393 [inline] __do_sys_getsockopt net/socket.c:2400 [inline] __se_sys_getsockopt net/socket.c:2397 [inline] __x64_sys_getsockopt+0x2a1/0x370 net/socket.c:2397 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5302: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 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+0x196/0x430 mm/slub.c:4757 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:866 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1022 [inline] do_ipt_get_ctl+0x1238/0x18b0 net/ipv4/netfilter/ip_tables.c:1668 nf_getsockopt+0x299/0x2c0 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x222/0x2e0 net/ipv4/ip_sockglue.c:1777 tcp_getsockopt+0x163/0x1c0 net/ipv4/tcp.c:4684 do_sock_getsockopt+0x38e/0x740 net/socket.c:2364 __sys_getsockopt net/socket.c:2393 [inline] __do_sys_getsockopt net/socket.c:2400 [inline] __se_sys_getsockopt net/socket.c:2397 [inline] __x64_sys_getsockopt+0x2a1/0x370 net/socket.c:2397 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888042706500 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 56 bytes to the right of allocated 64-byte region [ffff888042706500, ffff888042706540) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x42706 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff88801b0418c0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000080200020 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 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5300, tgid 5300 (syz-executor), ts 65842184543, free_ts 65830263118 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4740 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2587 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 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_noprof+0x2e6/0x4c0 mm/slub.c:4306 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] tomoyo_commit_ok+0x29/0x1d0 security/tomoyo/memory.c:76 tomoyo_update_domain+0x557/0x8b0 security/tomoyo/domain.c:139 tomoyo_write_env security/tomoyo/environ.c:105 [inline] tomoyo_write_misc+0x1ae/0x220 security/tomoyo/environ.c:121 tomoyo_write_domain2+0x1e0/0x250 security/tomoyo/common.c:1144 tomoyo_add_entry security/tomoyo/common.c:2143 [inline] tomoyo_supervisor+0x119d/0x1860 security/tomoyo/common.c:2204 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x178/0x210 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0x1495/0x1dd0 security/tomoyo/domain.c:888 tomoyo_bprm_check_security+0x117/0x180 security/tomoyo/tomoyo.c:102 page last free pid 5299 tgid 5299 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660 __slab_free+0x2c2/0x380 mm/slub.c:4520 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 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+0x1dd/0x390 mm/slub.c:4183 proc_alloc_inode+0x2a/0xc0 fs/proc/inode.c:57 alloc_inode+0x65/0x1a0 fs/inode.c:336 new_inode_pseudo fs/inode.c:1174 [inline] new_inode+0x22/0x1d0 fs/inode.c:1193 proc_pid_make_inode+0x1f/0x130 fs/proc/base.c:1950 proc_pident_instantiate+0x76/0x2b0 fs/proc/base.c:2699 proc_pident_lookup+0x1c6/0x2a0 fs/proc/base.c:2735 lookup_open fs/namei.c:3629 [inline] open_last_lookups fs/namei.c:3750 [inline] path_openat+0x11b4/0x3590 fs/namei.c:3986 do_filp_open+0x27f/0x4e0 fs/namei.c:4016 do_sys_openat2+0x13e/0x1d0 fs/open.c:1428 do_sys_open fs/open.c:1443 [inline] __do_sys_openat fs/open.c:1459 [inline] __se_sys_openat fs/open.c:1454 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1454 Memory state around the buggy address: ffff888042706400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888042706480: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888042706500: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff888042706580: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ffff888042706600: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================