EXT4-fs (loop1): no journal found EXT4-fs (loop1): can't get journal size ================================================================== BUG: KASAN: slab-out-of-bounds in check_igot_inode fs/ext4/inode.c:-1 [inline] BUG: KASAN: slab-out-of-bounds in __ext4_iget+0x2bb/0x3e50 fs/ext4/inode.c:4691 Read of size 8 at addr ffff88805f4a7f40 by task syz.1.4425/14157 CPU: 0 PID: 14157 Comm: syz.1.4425 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 check_igot_inode fs/ext4/inode.c:-1 [inline] __ext4_iget+0x2bb/0x3e50 fs/ext4/inode.c:4691 ext4_fill_super+0x73f9/0x94f0 fs/ext4/super.c:4872 mount_bdev+0x287/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fc5a4bfd0ca Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc5a2e54e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fc5a2e54ee0 RCX: 00007fc5a4bfd0ca RDX: 00002000000000c0 RSI: 0000200000000140 RDI: 00007fc5a2e54ea0 RBP: 00002000000000c0 R08: 00007fc5a2e54ee0 R09: 0000000000000011 R10: 0000000000000011 R11: 0000000000000246 R12: 0000200000000140 R13: 00007fc5a2e54ea0 R14: 0000000000000631 R15: 0000200000000780 Allocated by task 13848: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3238 proc_alloc_inode+0x19/0xa0 fs/proc/inode.c:69 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x5f/0x210 fs/inode.c:1001 new_inode+0x25/0x1c0 fs/inode.c:1030 proc_pid_make_inode+0x20/0x1c0 fs/proc/base.c:1957 proc_pid_make_base_inode fs/proc/base.c:2008 [inline] proc_pid_instantiate+0x4f/0x2b0 fs/proc/base.c:3439 proc_pid_lookup+0x2c4/0x3d0 fs/proc/base.c:3483 proc_root_lookup+0x1c/0x50 fs/proc/root.c:322 __lookup_slow+0x29d/0x410 fs/namei.c:1671 lookup_slow+0x53/0x70 fs/namei.c:1688 walk_component+0x319/0x460 fs/namei.c:1984 link_path_walk+0x665/0xd70 fs/namei.c:-1 path_openat+0x28d/0x2fa0 fs/namei.c:3746 do_filp_open+0x1e2/0x410 fs/namei.c:3777 do_sys_openat2+0x150/0x4b0 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1282 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Last potentially related work creation: kasan_save_stack+0x35/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3011 [inline] call_rcu+0x189/0x950 kernel/rcu/tree.c:3091 destroy_inode fs/inode.c:316 [inline] evict+0x834/0x8d0 fs/inode.c:662 proc_invalidate_siblings_dcache+0x3ef/0x650 fs/proc/inode.c:160 release_task+0x1413/0x15b0 kernel/exit.c:269 wait_task_zombie kernel/exit.c:1182 [inline] wait_consider_task+0x18fe/0x2e10 kernel/exit.c:1409 do_wait_thread kernel/exit.c:1472 [inline] do_wait+0x2f8/0xac0 kernel/exit.c:1589 kernel_wait4+0x22b/0x2b0 kernel/exit.c:1752 __do_sys_wait4 kernel/exit.c:1780 [inline] __se_sys_wait4 kernel/exit.c:1776 [inline] __x64_sys_wait4+0x163/0x230 kernel/exit.c:1776 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff88805f4a7590 which belongs to the cache proc_inode_cache of size 1240 The buggy address is located 1240 bytes to the right of 1240-byte region [ffff88805f4a7590, ffff88805f4a7a68) The buggy address belongs to the page: page:ffffea00017d2800 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805f4a0558 pfn:0x5f4a0 head:ffffea00017d2800 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff888027d4aa01 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00018bca00 0000000200000002 ffff88801794a3c0 raw: ffff88805f4a0558 0000000080170000 00000001ffffffff ffff888027d4aa01 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 13803, ts 477961264022, free_ts 393903821908 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501 alloc_slab_page mm/slub.c:1780 [inline] allocate_slab mm/slub.c:1917 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1980 ___slab_alloc+0x80a/0xdd0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x195/0x290 mm/slub.c:3238 proc_alloc_inode+0x19/0xa0 fs/proc/inode.c:69 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x5f/0x210 fs/inode.c:1001 new_inode+0x25/0x1c0 fs/inode.c:1030 proc_pid_make_inode+0x20/0x1c0 fs/proc/base.c:1957 proc_pid_make_base_inode fs/proc/base.c:2008 [inline] proc_pid_instantiate+0x4f/0x2b0 fs/proc/base.c:3439 proc_pid_lookup+0x2c4/0x3d0 fs/proc/base.c:3483 proc_root_lookup+0x1c/0x50 fs/proc/root.c:322 __lookup_slow+0x29d/0x410 fs/namei.c:1671 lookup_slow+0x53/0x70 fs/namei.c:1688 walk_component+0x319/0x460 fs/namei.c:1984 link_path_walk+0x665/0xd70 fs/namei.c:-1 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] kmem_cache_alloc_node+0x12d/0x2d0 mm/slub.c:3261 __alloc_skb+0xf4/0x750 net/core/skbuff.c:415 alloc_skb include/linux/skbuff.h:1162 [inline] alloc_skb_with_frags+0xa7/0x730 net/core/skbuff.c:6170 sock_alloc_send_pskb+0x87f/0x9a0 net/core/sock.c:2536 unix_dgram_sendmsg+0x5fc/0x18a0 net/unix/af_unix.c:1809 sock_sendmsg_nosec net/socket.c:706 [inline] __sock_sendmsg net/socket.c:718 [inline] __sys_sendto+0x46d/0x620 net/socket.c:2072 __do_sys_sendto net/socket.c:2084 [inline] __se_sys_sendto net/socket.c:2080 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2080 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Memory state around the buggy address: ffff88805f4a7e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805f4a7e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88805f4a7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88805f4a7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805f4a8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================