EXT4-fs error (device loop1): ext4_readdir:260: inode #2: block 16: comm syz-executor: path /0/file1: bad entry in directory: rec_len is smaller than minimal - offset=980, inode=0, rec_len=0, size=1024 fake=0 ================================================================== BUG: KASAN: slab-out-of-bounds in ext4_read_inline_data fs/ext4/inline.c:209 [inline] BUG: KASAN: slab-out-of-bounds in ext4_read_inline_dir+0x48b/0xdf0 fs/ext4/inline.c:1483 Read of size 68 at addr ffff88801ee9651a by task syz-executor/5210 CPU: 1 UID: 0 PID: 5210 Comm: syz-executor Not tainted 6.11.0-rc3-syzkaller-00271-g85652baa895b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 ext4_read_inline_data fs/ext4/inline.c:209 [inline] ext4_read_inline_dir+0x48b/0xdf0 fs/ext4/inline.c:1483 ext4_readdir+0x3bb/0x3500 fs/ext4/dir.c:158 iterate_dir+0x57a/0x810 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:407 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:392 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa6455ac013 Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 52 43 f8 ff 66 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7 d8 RSP: 002b:00007ffd42bb9988 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00005555671ff640 RCX: 00007fa6455ac013 RDX: 0000000000008000 RSI: 00005555671ff640 RDI: 0000000000000006 RBP: 00005555671ff614 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8 R13: 0000000000000016 R14: 00005555671ff610 R15: 00007ffd42bbcd20 Allocated by task 1: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4189 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] tty_register_device_attr+0x311/0x960 drivers/tty/tty_io.c:3261 tty_register_device drivers/tty/tty_io.c:3210 [inline] tty_register_driver+0x5f6/0xc30 drivers/tty/tty_io.c:3473 legacy_pty_init+0x3ac/0x610 drivers/tty/pty.c:579 pty_init+0xe/0x20 drivers/tty/pty.c:943 do_one_initcall+0x248/0x880 init/main.c:1267 do_initcall_level+0x157/0x210 init/main.c:1329 do_initcalls+0x3f/0x80 init/main.c:1345 kernel_init_freeable+0x435/0x5d0 init/main.c:1578 kernel_init+0x1d/0x2b0 init/main.c:1467 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The buggy address belongs to the object at ffff88801ee96000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 170 bytes to the right of allocated 1136-byte region [ffff88801ee96000, ffff88801ee96470) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ee90 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000040 ffff888015442000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000080008 00000001fdffffff 0000000000000000 head: 00fff00000000040 ffff888015442000 dead000000000122 0000000000000000 head: 0000000000000000 0000000000080008 00000001fdffffff 0000000000000000 head: 00fff00000000003 ffffea00007ba401 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 6434424428, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3442 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4700 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2321 allocate_slab+0x5a/0x2f0 mm/slub.c:2484 new_slab mm/slub.c:2537 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723 __slab_alloc+0x58/0xa0 mm/slub.c:3813 __slab_alloc_node mm/slub.c:3866 [inline] slab_alloc_node mm/slub.c:4025 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4184 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] tty_register_device_attr+0x311/0x960 drivers/tty/tty_io.c:3261 tty_register_device drivers/tty/tty_io.c:3210 [inline] tty_register_driver+0x5f6/0xc30 drivers/tty/tty_io.c:3473 legacy_pty_init+0x3ac/0x610 drivers/tty/pty.c:579 pty_init+0xe/0x20 drivers/tty/pty.c:943 do_one_initcall+0x248/0x880 init/main.c:1267 do_initcall_level+0x157/0x210 init/main.c:1329 do_initcalls+0x3f/0x80 init/main.c:1345 kernel_init_freeable+0x435/0x5d0 init/main.c:1578 page_owner free stack trace missing Memory state around the buggy address: ffff88801ee96400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc ffff88801ee96480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88801ee96500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88801ee96580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801ee96600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================