REISERFS (device loop7): journal params: device loop7, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop7): checking transaction log (loop7) REISERFS (device loop7): Using r5 hash to sort names ================================================================== BUG: KASAN: use-after-free in reiserfs_find_actor+0xe6/0x100 fs/reiserfs/inode.c:1625 Read of size 4 at addr ffff88805c69a1f0 by task syz.7.3127/19310 CPU: 1 PID: 19310 Comm: syz.7.3127 Not tainted 6.1.147-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0xa8/0x200 mm/kasan/report.c:418 kasan_report+0x10b/0x140 mm/kasan/report.c:522 reiserfs_find_actor+0xe6/0x100 fs/reiserfs/inode.c:1625 find_inode+0x180/0x3c0 fs/inode.c:960 inode_insert5+0xf4/0x500 fs/inode.c:1257 insert_inode_locked4+0x5a/0x90 fs/inode.c:1767 reiserfs_new_inode+0x3e8/0x1860 fs/reiserfs/inode.c:1960 reiserfs_mkdir+0x557/0x970 fs/reiserfs/namei.c:845 xattr_mkdir fs/reiserfs/xattr.c:76 [inline] create_privroot fs/reiserfs/xattr.c:882 [inline] reiserfs_xattr_init+0x331/0x720 fs/reiserfs/xattr.c:1005 reiserfs_fill_super+0x1f81/0x2340 fs/reiserfs/super.c:2175 mount_bdev+0x287/0x3c0 fs/super.c:1443 legacy_get_tree+0xe6/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3063 do_mount fs/namespace.c:3406 [inline] __do_sys_mount fs/namespace.c:3614 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3591 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fb738f9014a 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:00007fb739ea4e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb739ea4ef0 RCX: 00007fb738f9014a RDX: 0000200000001100 RSI: 0000200000000040 RDI: 00007fb739ea4eb0 RBP: 0000200000001100 R08: 00007fb739ea4ef0 R09: 0000000000000002 R10: 0000000000000002 R11: 0000000000000246 R12: 0000200000000040 R13: 00007fb739ea4eb0 R14: 000000000000110f R15: 00002000000000c0 Allocated by task 15015: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x6b/0x80 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x4b/0x480 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x11a/0x2e0 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3245 [inline] f2fs_alloc_inode+0x151/0x520 fs/f2fs/super.c:1419 alloc_inode fs/inode.c:261 [inline] iget_locked+0x1a9/0x830 fs/inode.c:1373 f2fs_iget+0x52/0x4a00 fs/f2fs/inode.c:483 f2fs_fill_super+0x4849/0x6b20 fs/f2fs/super.c:4409 mount_bdev+0x287/0x3c0 fs/super.c:1443 legacy_get_tree+0xe6/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3063 do_mount fs/namespace.c:3406 [inline] __do_sys_mount fs/namespace.c:3614 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3591 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:486 call_rcu+0x154/0x980 kernel/rcu/tree.c:2849 destroy_inode fs/inode.c:316 [inline] evict+0x7da/0x870 fs/inode.c:720 f2fs_fill_super+0x54a1/0x6b20 fs/f2fs/super.c:4592 mount_bdev+0x287/0x3c0 fs/super.c:1443 legacy_get_tree+0xe6/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3063 do_mount fs/namespace.c:3406 [inline] __do_sys_mount fs/namespace.c:3614 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3591 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88805c699aa0 which belongs to the cache f2fs_inode_cache of size 2144 The buggy address is located 1872 bytes inside of 2144-byte region [ffff88805c699aa0, ffff88805c69a300) The buggy address belongs to the physical page: page:ffffea000171a600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805c69ac60 pfn:0x5c698 head:ffffea000171a600 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff88807cc6f201 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff8881413bf280 raw: ffff88805c69ac60 00000000800e0007 00000001ffffffff ffff88807cc6f201 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 14829, tgid 14828 (syz.3.2438), ts 1257662592664, free_ts 1251311103940 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2532 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x1a26/0x1ac0 mm/page_alloc.c:4328 __alloc_pages+0x1df/0x4e0 mm/page_alloc.c:5614 alloc_slab_page+0x5d/0x160 mm/slub.c:1794 allocate_slab mm/slub.c:1939 [inline] new_slab+0x87/0x2c0 mm/slub.c:1992 ___slab_alloc+0xbc6/0x1220 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x1ae/0x2e0 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3245 [inline] f2fs_alloc_inode+0x151/0x520 fs/f2fs/super.c:1419 alloc_inode fs/inode.c:261 [inline] iget_locked+0x1a9/0x830 fs/inode.c:1373 f2fs_iget+0x52/0x4a00 fs/f2fs/inode.c:483 f2fs_fill_super+0x3cdf/0x6b20 fs/f2fs/super.c:4307 mount_bdev+0x287/0x3c0 fs/super.c:1443 legacy_get_tree+0xe6/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3063 do_mount fs/namespace.c:3406 [inline] __do_sys_mount fs/namespace.c:3614 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3591 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare mm/page_alloc.c:1509 [inline] free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3479 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x144/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1e/0x80 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x4b/0x480 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] __kmem_cache_alloc_node+0x140/0x260 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc+0xa0/0x240 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] tomoyo_realpath_from_path+0xdf/0x5d0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x1fd/0x550 security/tomoyo/file.c:822 security_inode_getattr+0xcf/0x120 security/security.c:1361 vfs_getattr+0x26/0x3a0 fs/stat.c:158 vfs_fstat fs/stat.c:183 [inline] __do_sys_newfstat fs/stat.c:447 [inline] __se_sys_newfstat fs/stat.c:444 [inline] __x64_sys_newfstat+0x102/0x1c0 fs/stat.c:444 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff88805c69a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805c69a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805c69a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805c69a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805c69a280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================