loop7: detected capacity change from 0 to 512 ================================================================== BUG: KASAN: slab-out-of-bounds in __ext4_iget+0x2ee/0x3ef0 fs/ext4/inode.c:4683 Read of size 8 at addr ffff88810c87fef8 by task syz.7.3358/13297 CPU: 1 PID: 13297 Comm: syz.7.3358 Not tainted 5.15.167-syzkaller-00002-g3bfe08931bff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:444 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 __ext4_iget+0x2ee/0x3ef0 fs/ext4/inode.c:4683 ext4_quota_enable fs/ext4/super.c:6378 [inline] ext4_enable_quotas+0x556/0x980 fs/ext4/super.c:6414 ext4_fill_super+0x8b95/0x96e0 fs/ext4/super.c:4950 mount_bdev+0x282/0x3b0 fs/super.c:1398 ext4_mount+0x34/0x40 fs/ext4/super.c:6593 legacy_get_tree+0xf1/0x190 fs/fs_context.c:611 vfs_get_tree+0x88/0x290 fs/super.c:1528 do_new_mount+0x2ba/0xb30 fs/namespace.c:3005 path_mount+0x671/0x1070 fs/namespace.c:3335 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3533 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3533 x64_sys_call+0x49d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f3afa9b8eba Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3af962fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f3af962fef0 RCX: 00007f3afa9b8eba RDX: 0000000020000100 RSI: 0000000020000500 RDI: 00007f3af962feb0 RBP: 0000000020000100 R08: 00007f3af962fef0 R09: 0000000002008002 R10: 0000000002008002 R11: 0000000000000246 R12: 0000000020000500 R13: 00007f3af962feb0 R14: 000000000000053d R15: 0000000020000080 Allocated by task 224: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] __kasan_slab_alloc+0xb1/0xe0 mm/kasan/common.c:466 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550 slab_alloc_node mm/slub.c:3240 [inline] slab_alloc mm/slub.c:3248 [inline] kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253 ext4_alloc_inode+0x21/0x640 fs/ext4/super.c:1288 alloc_inode fs/inode.c:236 [inline] iget_locked+0x174/0x860 fs/inode.c:1279 __ext4_iget+0x25d/0x3ef0 fs/ext4/inode.c:4679 ext4_lookup+0x691/0xaa0 fs/ext4/namei.c:1856 __lookup_slow+0x2b9/0x400 fs/namei.c:1663 lookup_slow+0x5a/0x80 fs/namei.c:1680 walk_component+0x48c/0x610 fs/namei.c:1976 lookup_last fs/namei.c:2431 [inline] path_lookupat+0x16d/0x450 fs/namei.c:2455 filename_lookup+0x230/0x5c0 fs/namei.c:2484 user_path_at_empty+0x43/0x1a0 fs/namei.c:2883 user_path_at include/linux/namei.h:57 [inline] __do_sys_chdir fs/open.c:491 [inline] __se_sys_chdir+0xbb/0x220 fs/open.c:485 __x64_sys_chdir+0x38/0x40 fs/open.c:485 x64_sys_call+0x258/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:81 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff88810c87f4e0 which belongs to the cache ext4_inode_cache of size 1368 The buggy address is located 1216 bytes to the right of 1368-byte region [ffff88810c87f4e0, ffff88810c87fa38) The buggy address belongs to the page: page:ffffea0004321e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88810c878000 pfn:0x10c878 head:ffffea0004321e00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 ffff8881049fd090 ffffea0004988608 ffff888107fcac00 raw: ffff88810c878000 000000000015000e 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE), pid 186, ts 6903570654, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1b/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5779 allocate_slab mm/slub.c:1932 [inline] new_slab+0x9a/0x4e0 mm/slub.c:1995 ___slab_alloc+0x39e/0x830 mm/slub.c:3028 __slab_alloc+0x4a/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3248 [inline] kmem_cache_alloc+0x134/0x200 mm/slub.c:3253 ext4_alloc_inode+0x21/0x640 fs/ext4/super.c:1288 alloc_inode fs/inode.c:236 [inline] iget_locked+0x174/0x860 fs/inode.c:1279 __ext4_iget+0x25d/0x3ef0 fs/ext4/inode.c:4679 ext4_lookup+0x691/0xaa0 fs/ext4/namei.c:1856 __lookup_slow+0x2b9/0x400 fs/namei.c:1663 lookup_slow+0x5a/0x80 fs/namei.c:1680 walk_component+0x48c/0x610 fs/namei.c:1976 lookup_last fs/namei.c:2431 [inline] path_lookupat+0x16d/0x450 fs/namei.c:2455 page_owner free stack trace missing Memory state around the buggy address: ffff88810c87fd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88810c87fe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88810c87fe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88810c87ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88810c87ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== EXT4-fs warning (device loop7): ext4_enable_quotas:6422: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix. EXT4-fs (loop7): mount failed