loop1: 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 ffff88807eae5798 by task syz-executor.1/26879 CPU: 1 PID: 26879 Comm: syz-executor.1 Not tainted 6.2.0-syzkaller-12485-gf3a2439f20d9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 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:319 [inline] print_report+0x163/0x540 mm/kasan/report.c:430 kasan_report+0x143/0x170 mm/kasan/report.c:536 reiserfs_xattr_get+0xe6/0x570 fs/reiserfs/xattr.c:674 reiserfs_get_acl+0x7e/0x650 fs/reiserfs/xattr_acl.c:215 __get_acl+0x288/0x470 fs/posix_acl.c:160 check_acl+0x3a/0x150 fs/namei.c:307 acl_permission_check fs/namei.c:352 [inline] generic_permission+0x362/0x550 fs/namei.c:405 do_inode_permission fs/namei.c:459 [inline] inode_permission+0x233/0x460 fs/namei.c:526 may_open+0x2d6/0x440 fs/namei.c:3188 do_open fs/namei.c:3558 [inline] path_openat+0x2652/0x3170 fs/namei.c:3715 do_filp_open+0x234/0x490 fs/namei.c:3742 do_sys_openat2+0x13f/0x500 fs/open.c:1312 do_sys_open fs/open.c:1328 [inline] __do_sys_openat fs/open.c:1344 [inline] __se_sys_openat fs/open.c:1339 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1339 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: 0033:0x7fd62303e284 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:00007fd623e7ef10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000005f05 RCX: 00007fd62303e284 RDX: 0000000000010000 RSI: 0000000020005e40 RDI: 00000000ffffff9c RBP: 0000000020005e40 R08: 0000000000000000 R09: 0000000001000802 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000010000 R13: 0000000020005e40 R14: 00007fd623e7efe0 R15: 0000000020000040 Allocated by task 26879: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0xb3/0x1a0 mm/slab_common.c:980 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+0x7b4/0x930 fs/super.c:272 sget+0x1fa/0x4d0 fs/super.c:655 mount_bdev+0xed/0x3a0 fs/super.c:1342 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1501 do_new_mount+0x28f/0xae0 fs/namespace.c:3042 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3571 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 ffff88807eae5600 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 152 bytes to the right of allocated 256-byte region [ffff88807eae5600, ffff88807eae5700) The buggy address belongs to the physical page: page:ffffea0001fab900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7eae4 head:ffffea0001fab900 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012441b40 dead000000000100 dead000000000122 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 12026, tgid 12026 (syz-executor.5), ts 630554170551, free_ts 604607076896 prep_new_page mm/page_alloc.c:2552 [inline] get_page_from_freelist+0x37e0/0x3970 mm/page_alloc.c:4325 __alloc_pages+0x291/0x7f0 mm/page_alloc.c:5591 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 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc+0xa2/0x1a0 mm/slab_common.c:980 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] new_dir fs/proc/proc_sysctl.c:971 [inline] get_subdir fs/proc/proc_sysctl.c:1015 [inline] __register_sysctl_table+0xaab/0x12a0 fs/proc/proc_sysctl.c:1372 mpls_dev_sysctl_register+0x1f1/0x2d0 net/mpls/af_mpls.c:1421 mpls_add_dev net/mpls/af_mpls.c:1476 [inline] mpls_dev_notify+0x252/0x7b0 net/mpls/af_mpls.c:1616 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x170 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1937 [inline] call_netdevice_notifiers_extack net/core/dev.c:1975 [inline] call_netdevice_notifiers+0x149/0x1c0 net/core/dev.c:1989 register_netdevice+0x1349/0x1790 net/core/dev.c:10077 tun_set_iff+0x861/0xe80 drivers/net/tun.c:2829 __tun_chr_ioctl+0x872/0x2490 drivers/net/tun.c:3097 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1453 [inline] free_pcp_prepare mm/page_alloc.c:1503 [inline] free_unref_page_prepare+0xf0e/0xf70 mm/page_alloc.c:3387 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3482 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769 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 f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2796 [inline] f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2806 [inline] add_free_nid+0xdc/0x700 fs/f2fs/node.c:2292 scan_free_nid_bits fs/f2fs/node.c:2443 [inline] __f2fs_build_free_nids fs/f2fs/node.c:2477 [inline] f2fs_build_free_nids+0x514/0x11a0 fs/f2fs/node.c:2535 f2fs_balance_fs_bg+0x167/0x990 fs/f2fs/segment.c:468 f2fs_write_node_pages+0x146/0x6a0 fs/f2fs/node.c:2113 do_writepages+0x3a6/0x670 mm/page-writeback.c:2551 __writeback_single_inode+0x1c4/0x15e0 fs/fs-writeback.c:1600 writeback_sb_inodes+0x92c/0x1360 fs/fs-writeback.c:1891 __writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:1962 wb_writeback+0x51c/0x1080 fs/fs-writeback.c:2067 Memory state around the buggy address: ffff88807eae5680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807eae5700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807eae5780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807eae5800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807eae5880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================