loop2: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-out-of-bounds in reiserfs_xattr_get+0xe6/0x570 fs/reiserfs/xattr.c:674 Read of size 8 at addr ffff88807e2e6598 by task syz-executor.2/29868 CPU: 0 PID: 29868 Comm: syz-executor.2 Not tainted 6.2.0-rc7-syzkaller-00208-gd12aca5c0cee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x163/0x4f0 mm/kasan/report.c:417 kasan_report+0x13a/0x170 mm/kasan/report.c:517 reiserfs_xattr_get+0xe6/0x570 fs/reiserfs/xattr.c:674 reiserfs_get_acl+0x7e/0x650 fs/reiserfs/xattr_acl.c:215 __get_acl+0x233/0x320 fs/posix_acl.c:159 check_acl+0x3a/0x150 fs/namei.c:306 acl_permission_check fs/namei.c:351 [inline] generic_permission+0x3aa/0x510 fs/namei.c:404 do_inode_permission fs/namei.c:458 [inline] inode_permission+0x233/0x460 fs/namei.c:525 may_open+0x2d6/0x440 fs/namei.c:3185 do_open fs/namei.c:3555 [inline] path_openat+0x24a5/0x2e40 fs/namei.c:3714 do_filp_open+0x234/0x490 fs/namei.c:3741 do_sys_openat2+0x13f/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+0x247/0x290 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1e54a3e284 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:00007f1e558b5f10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000005f92 RCX: 00007f1e54a3e284 RDX: 0000000000010000 RSI: 0000000020000000 RDI: 00000000ffffff9c RBP: 0000000020000000 R08: 0000000000000000 R09: 0000000000018008 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000010000 R13: 0000000020000000 R14: 00007f1e558b5fe0 R15: 0000000020000180 Allocated by task 29868: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x80 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_kmalloc+0x9b/0xb0 mm/kasan/common.c:380 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:968 [inline] __kmalloc+0xb3/0x1a0 mm/slab_common.c:981 kmalloc_array include/linux/slab.h:636 [inline] kcalloc include/linux/slab.h:667 [inline] __list_lru_init+0xaa/0x5e0 mm/list_lru.c:571 alloc_super+0x785/0x930 fs/super.c:270 sget+0x1f5/0x4d0 fs/super.c:643 mount_bdev+0xed/0x3a0 fs/super.c:1330 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1489 do_new_mount+0x28f/0xae0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807e2e6400 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 152 bytes to the right of 256-byte region [ffff88807e2e6400, ffff88807e2e6500) The buggy address belongs to the physical page: page:ffffea0001f8b980 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e2e6 head:ffffea0001f8b980 order:1 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012441b40 ffffea0000a60900 dead000000000004 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 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5671, tgid 5671 (udevd), ts 2130183243100, free_ts 2129977879649 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x3449/0x35c0 mm/page_alloc.c:4283 __alloc_pages+0x291/0x7e0 mm/page_alloc.c:5549 alloc_slab_page+0x6a/0x160 mm/slub.c:1851 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 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+0x1b8/0x2a0 mm/slub.c:3491 kmalloc_trace+0x2a/0x60 mm/slab_common.c:1062 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] smk_fetch+0x92/0x140 security/smack/smack_lsm.c:291 smack_d_instantiate+0x5ad/0xa20 security/smack/smack_lsm.c:3491 security_d_instantiate+0x9b/0xf0 security/security.c:2138 d_instantiate+0x55/0x90 fs/dcache.c:2034 shmem_symlink+0x59e/0x750 mm/shmem.c:3175 vfs_symlink+0x24b/0x3e0 fs/namei.c:4401 do_symlinkat+0x1ec/0x5f0 fs/namei.c:4430 __do_sys_symlink fs/namei.c:4452 [inline] __se_sys_symlink fs/namei.c:4450 [inline] __x64_sys_symlink+0x7e/0x90 fs/namei.c:4450 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare mm/page_alloc.c:1496 [inline] free_unref_page_prepare+0xf3a/0x1040 mm/page_alloc.c:3369 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3464 discard_slab mm/slub.c:2098 [inline] __unfreeze_partials+0x1b1/0x1f0 mm/slub.c:2637 put_cpu_partial+0x116/0x180 mm/slub.c:2713 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x68/0x390 mm/slab.h:761 slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x12c/0x280 mm/slub.c:3476 getname_flags+0xbc/0x4e0 fs/namei.c:139 vfs_fstatat fs/stat.c:269 [inline] __do_sys_newfstatat fs/stat.c:440 [inline] __se_sys_newfstatat+0xe6/0x7c0 fs/stat.c:434 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88807e2e6480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807e2e6500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807e2e6580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807e2e6600: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807e2e6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================