loop2: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-out-of-bounds in reiserfs_xattr_get+0xe3/0x580 fs/reiserfs/xattr.c:674 Read of size 8 at addr ffff888022ad1d98 by task syz-executor.2/19377 CPU: 1 PID: 19377 Comm: syz-executor.2 Not tainted 6.2.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:306 print_report+0x107/0x220 mm/kasan/report.c:417 kasan_report+0x139/0x170 mm/kasan/report.c:517 reiserfs_xattr_get+0xe3/0x580 fs/reiserfs/xattr.c:674 reiserfs_get_acl+0x7a/0x650 fs/reiserfs/xattr_acl.c:215 __get_acl+0x241/0x330 fs/posix_acl.c:159 check_acl+0x35/0x150 fs/namei.c:306 acl_permission_check fs/namei.c:351 [inline] generic_permission+0x39d/0x500 fs/namei.c:404 do_inode_permission fs/namei.c:458 [inline] inode_permission+0x22c/0x450 fs/namei.c:525 may_open+0x2a4/0x400 fs/namei.c:3185 do_open fs/namei.c:3555 [inline] path_openat+0x2472/0x2de0 fs/namei.c:3714 do_filp_open+0x275/0x500 fs/namei.c:3741 do_sys_openat2+0x13b/0x500 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f0baf83e254 Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44 RSP: 002b:00007f0bb0698f10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000005f12 RCX: 00007f0baf83e254 RDX: 0000000000010000 RSI: 0000000020000000 RDI: 00000000ffffff9c RBP: 0000000020000000 R08: 0000000000000000 R09: 0000000000200000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000010000 R13: 0000000020000000 R14: 00007f0bb0698fe0 R15: 0000000020000140 Allocated by task 13463: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] smk_fetch+0x91/0x140 security/smack/smack_lsm.c:291 smack_d_instantiate+0x741/0xa10 security/smack/smack_lsm.c:3528 security_d_instantiate+0xa5/0x100 security/security.c:2138 d_instantiate+0x51/0x90 fs/dcache.c:2034 shmem_symlink+0x58a/0x740 mm/shmem.c:3177 vfs_symlink+0x246/0x3d0 fs/namei.c:4401 do_symlinkat+0x1f4/0x600 fs/namei.c:4430 __do_sys_symlink fs/namei.c:4452 [inline] __se_sys_symlink fs/namei.c:4450 [inline] __x64_sys_symlink+0x7a/0x90 fs/namei.c:4450 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 13463: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:518 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0x71/0x110 mm/slub.c:3800 smk_fetch+0x108/0x140 security/smack/smack_lsm.c:303 smack_d_instantiate+0x741/0xa10 security/smack/smack_lsm.c:3528 security_d_instantiate+0xa5/0x100 security/security.c:2138 d_instantiate+0x51/0x90 fs/dcache.c:2034 shmem_symlink+0x58a/0x740 mm/shmem.c:3177 vfs_symlink+0x246/0x3d0 fs/namei.c:4401 do_symlinkat+0x1f4/0x600 fs/namei.c:4430 __do_sys_symlink fs/namei.c:4452 [inline] __se_sys_symlink fs/namei.c:4450 [inline] __x64_sys_symlink+0x7a/0x90 fs/namei.c:4450 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:488 kvfree_call_rcu+0x118/0x8c0 kernel/rcu/tree.c:3376 drop_sysctl_table+0x31c/0x460 fs/proc/proc_sysctl.c:1709 drop_sysctl_table+0x32e/0x460 fs/proc/proc_sysctl.c:1712 unregister_sysctl_table+0x87/0x140 fs/proc/proc_sysctl.c:1747 __devinet_sysctl_unregister net/ipv4/devinet.c:2610 [inline] devinet_exit_net+0xed/0x230 net/ipv4/devinet.c:2753 ops_exit_list net/core/net_namespace.c:169 [inline] cleanup_net+0x758/0xc60 net/core/net_namespace.c:606 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:488 kvfree_call_rcu+0x118/0x8c0 kernel/rcu/tree.c:3376 drop_sysctl_table+0x31c/0x460 fs/proc/proc_sysctl.c:1709 drop_sysctl_table+0x32e/0x460 fs/proc/proc_sysctl.c:1712 unregister_sysctl_table+0x87/0x140 fs/proc/proc_sysctl.c:1747 mptcp_pernet_del_table net/mptcp/ctrl.c:172 [inline] mptcp_net_exit+0x59/0x70 net/mptcp/ctrl.c:202 ops_exit_list net/core/net_namespace.c:169 [inline] cleanup_net+0x758/0xc60 net/core/net_namespace.c:606 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff888022ad1c00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 152 bytes to the right of 256-byte region [ffff888022ad1c00, ffff888022ad1d00) The buggy address belongs to the physical page: page:ffffea00008ab400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x22ad0 head:ffffea00008ab400 order:1 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 anon flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012841b40 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 24, tgid 24 (kdevtmpfs), ts 8596413600, free_ts 0 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_slab_page+0xbd/0x190 mm/slub.c:1851 allocate_slab+0x5e/0x3c0 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0x7f4/0xeb0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x25b/0x340 mm/slub.c:3491 kmalloc_trace+0x26/0x60 mm/slab_common.c:1062 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] smk_fetch+0x91/0x140 security/smack/smack_lsm.c:291 smack_d_instantiate+0x7b0/0xa10 security/smack/smack_lsm.c:3534 security_d_instantiate+0xa5/0x100 security/security.c:2138 d_instantiate+0x51/0x90 fs/dcache.c:2034 shmem_mknod+0x173/0x1b0 mm/shmem.c:2939 shmem_mkdir+0x2e/0x60 mm/shmem.c:2978 vfs_mkdir+0x3b3/0x590 fs/namei.c:4036 dev_mkdir drivers/base/devtmpfs.c:176 [inline] create_path drivers/base/devtmpfs.c:201 [inline] handle_create drivers/base/devtmpfs.c:220 [inline] handle drivers/base/devtmpfs.c:391 [inline] devtmpfs_work_loop+0x374/0x10c0 drivers/base/devtmpfs.c:406 devtmpfsd+0x44/0x50 drivers/base/devtmpfs.c:448 page_owner free stack trace missing Memory state around the buggy address: ffff888022ad1c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888022ad1d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888022ad1d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888022ad1e00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888022ad1e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================