================================================================== BUG: KASAN: slab-out-of-bounds in __ext4_iget+0x26c/0x3390 fs/ext4/inode.c:4716 Read of size 8 at addr ffff00010e5a7f30 by task syz-executor.0/9192 CPU: 1 PID: 9192 Comm: syz-executor.0 Not tainted 6.7.0-rc8-syzkaller-g0802e17d9aca #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x174/0x514 mm/kasan/report.c:475 kasan_report+0xd8/0x138 mm/kasan/report.c:588 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381 __ext4_iget+0x26c/0x3390 fs/ext4/inode.c:4716 __ext4_fill_super fs/ext4/super.c:5482 [inline] ext4_fill_super+0x44a8/0x5818 fs/ext4/super.c:5712 get_tree_bdev+0x33c/0x4a8 fs/super.c:1598 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5744 vfs_get_tree+0x90/0x288 fs/super.c:1771 do_new_mount+0x25c/0x8c8 fs/namespace.c:3337 path_mount+0x590/0xe04 fs/namespace.c:3664 do_mount fs/namespace.c:3677 [inline] __do_sys_mount fs/namespace.c:3886 [inline] __se_sys_mount fs/namespace.c:3863 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3863 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Allocated by task 6123: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:511 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x90/0x498 mm/slab.h:763 slab_alloc_node mm/slub.c:3478 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc_lru+0x194/0x394 mm/slub.c:3509 alloc_inode_sb include/linux/fs.h:2937 [inline] sock_alloc_inode+0x2c/0xcc net/socket.c:308 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x68/0x1d0 fs/inode.c:1006 sock_alloc net/socket.c:634 [inline] __sock_create+0x134/0x884 net/socket.c:1533 sock_create net/socket.c:1620 [inline] __sys_socket_create net/socket.c:1657 [inline] __sys_socket+0x134/0x340 net/socket.c:1704 __do_sys_socket net/socket.c:1718 [inline] __se_sys_socket net/socket.c:1716 [inline] __arm64_sys_socket+0x7c/0x94 net/socket.c:1716 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Freed by task 16: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:522 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] kmem_cache_free+0x2e4/0x56c mm/slub.c:3831 sock_free_inode+0x28/0x38 net/socket.c:329 i_callback+0x50/0x78 fs/inode.c:250 rcu_do_batch kernel/rcu/tree.c:2158 [inline] rcu_core+0x890/0x1b34 kernel/rcu/tree.c:2431 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2448 __do_softirq+0x2d8/0xce4 kernel/softirq.c:553 Last potentially related work creation: kasan_save_stack+0x40/0x6c mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:492 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:502 __call_rcu_common kernel/rcu/tree.c:2681 [inline] call_rcu+0x104/0xaf4 kernel/rcu/tree.c:2795 destroy_inode fs/inode.c:316 [inline] evict+0x5fc/0x68c fs/inode.c:681 iput_final fs/inode.c:1777 [inline] iput+0x734/0x818 fs/inode.c:1803 dentry_unlink_inode+0x370/0x4b0 fs/dcache.c:401 __dentry_kill+0x324/0x5e4 fs/dcache.c:607 dentry_kill+0xc8/0x250 dput+0x218/0x454 fs/dcache.c:913 __fput+0x4f4/0x8e4 fs/file_table.c:402 __fput_sync+0x60/0x9c fs/file_table.c:475 __do_sys_close fs/open.c:1587 [inline] __se_sys_close fs/open.c:1572 [inline] __arm64_sys_close+0x150/0x1e0 fs/open.c:1572 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 The buggy address belongs to the object at ffff00010e5a7800 which belongs to the cache sock_inode_cache of size 1408 The buggy address is located 432 bytes to the right of allocated 1408-byte region [ffff00010e5a7800, ffff00010e5a7d80) The buggy address belongs to the physical page: page:00000000c49db75c refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff00010e5a1800 pfn:0x14e5a0 head:00000000c49db75c order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff0000d3b75301 ksm flags: 0x5ffc00000000840(slab|head|node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 05ffc00000000840 ffff0000c1ba3b40 fffffc0003055e00 0000000000000003 raw: ffff00010e5a1800 0000000080150012 00000001ffffffff ffff0000d3b75301 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff00010e5a7e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff00010e5a7e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff00010e5a7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff00010e5a7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff00010e5a8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. Unable to handle kernel paging request at virtual address dfff80004000000d KASAN: probably user-memory-access in range [0x0000000200000068-0x000000020000006f] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff80004000000d] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 9192 Comm: syz-executor.0 Tainted: G B 6.7.0-rc8-syzkaller-g0802e17d9aca #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : d_really_is_negative include/linux/dcache.h:467 [inline] pc : open_xa_root fs/reiserfs/xattr.c:125 [inline] pc : open_xa_dir+0xf8/0x578 fs/reiserfs/xattr.c:153 lr : open_xa_dir+0x9c/0x578 fs/reiserfs/xattr.c:151 sp : ffff800097787280 x29: ffff800097787310 x28: 000000004000000d x27: dfff800000000000 x26: ffff700012ef0e50 x25: 0000000000000000 x24: 1fffe0001ad654c6 x23: 0000000200000068 x22: ffff00010e5a8190 x21: ffff8000977872a0 x20: 0000000000000002 x19: ffff0000d6b2a630 x18: ffff800097787a18 x17: 0000000000000000 x16: ffff80008a77ce00 x15: ffff700012ef0e56 x14: 1ffff00012ef0e54 x13: 0000000000000001 x12: ffffffffffffffff x11: ffff700012ef0e56 x10: 1ffff00012ef0e56 x9 : 0000000000000001 x8 : 0000000200000000 x7 : 0000000000000000 x6 : ffff800080c73d70 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000001 x1 : 0000000000000000 x0 : ffff8000977872a0 Call trace: d_really_is_negative include/linux/dcache.h:467 [inline] open_xa_root fs/reiserfs/xattr.c:125 [inline] open_xa_dir+0xf8/0x578 fs/reiserfs/xattr.c:153 xattr_lookup+0x3c/0x268 fs/reiserfs/xattr.c:396 reiserfs_xattr_get+0xf0/0x96c fs/reiserfs/xattr.c:679 reiserfs_get_acl+0x94/0x624 fs/reiserfs/xattr_acl.c:215 __get_acl+0x26c/0x474 fs/posix_acl.c:160 get_inode_acl+0x34/0x44 fs/posix_acl.c:185 check_acl+0x40/0x184 fs/namei.c:310 acl_permission_check fs/namei.c:355 [inline] generic_permission+0x2f8/0x498 fs/namei.c:408 reiserfs_permission+0x74/0xa8 fs/reiserfs/xattr.c:958 do_inode_permission fs/namei.c:462 [inline] inode_permission+0x1d0/0x3b4 fs/namei.c:529 may_open+0x290/0x3bc fs/namei.c:3249 do_open fs/namei.c:3620 [inline] path_openat+0x1e44/0x2888 fs/namei.c:3779 do_filp_open+0x1bc/0x3cc fs/namei.c:3809 do_sys_openat2+0x124/0x1b8 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Code: 97ee1231 f94002e8 9101a117 d343fefc (387b6b88) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97ee1231 bl 0xffffffffffb848c4 4: f94002e8 ldr x8, [x23] 8: 9101a117 add x23, x8, #0x68 c: d343fefc lsr x28, x23, #3 * 10: 387b6b88 ldrb w8, [x28, x27] <-- trapping instruction