[syzbot] [ext4?] WARNING in kvfree (2)

From: syzbot
Date: Wed Mar 15 2023 - 13:58:08 EST

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Hello,

syzbot found the following issue on:

HEAD commit: fe15c26ee26e Linux 6.3-rc1
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=1100fce2c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=7573cbcd881a88c9
dashboard link: https://syzkaller.appspot.com/bug?extid=64b645917ce07d89bde5
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/89d41abd07bd/disk-fe15c26e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/fa75f5030ade/vmlinux-fe15c26e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/590d0f5903ee/Image-fe15c26e.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+64b645917ce07d89bde5@xxxxxxxxxxxxxxxxxxxxxxxxx

------------[ cut here ]------------
WARNING: CPU: 1 PID: 9389 at mm/slab_common.c:935 free_large_kmalloc+0x34/0x138 mm/slab_common.c:936
Modules linked in:
CPU: 1 PID: 9389 Comm: syz-executor.5 Not tainted 6.3.0-rc1-syzkaller-gfe15c26ee26e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : free_large_kmalloc+0x34/0x138 mm/slab_common.c:936
lr : kfree+0x184/0x228 mm/slab_common.c:1013
sp : ffff8000227974e0
x29: ffff8000227974e0 x28: 00000000000003bc x27: ffff000142fd15a4
x26: dfff800000000000 x25: 0000000000000020 x24: ffff0000c4f01c00
x23: 0000000000000020 x22: ffff00012f6d48e8 x21: ffff800008829ce8
x20: ffff000142fd15a4 x19: fffffc00050bf440 x18: ffff8000227970e0
x17: ffff800015cdd000 x16: ffff800008313a3c x15: 0000000000000000
x14: 00000000ffff8000 x13: 00000000ecdf532c x12: 0000000000000003
x11: ff8080000809b854 x10: 0000000000000000 x9 : 05ffc0000000203a
x8 : ffff8000186ee000 x7 : 0000000000000000 x6 : 000000000000003f
x5 : 0000000000000040 x4 : fffffffffffffff0 x3 : 0000000000000000
x2 : 0000000000000006 x1 : ffff000142fd15a4 x0 : fffffc00050bf440
Call trace:
free_large_kmalloc+0x34/0x138 mm/slab_common.c:936
kfree+0x184/0x228 mm/slab_common.c:1013
kvfree+0x40/0x50 mm/util.c:649
ext4_xattr_move_to_block fs/ext4/xattr.c:2680 [inline]
ext4_xattr_make_inode_space fs/ext4/xattr.c:2743 [inline]
ext4_expand_extra_isize_ea+0xcf8/0x1620 fs/ext4/xattr.c:2835
__ext4_expand_extra_isize+0x290/0x348 fs/ext4/inode.c:5955
ext4_try_to_expand_extra_isize fs/ext4/inode.c:5998 [inline]
__ext4_mark_inode_dirty+0x5dc/0xa94 fs/ext4/inode.c:6076
__ext4_unlink+0x768/0x998 fs/ext4/namei.c:3256
ext4_unlink+0x2ec/0xb10 fs/ext4/namei.c:3299
vfs_unlink+0x2f0/0x508 fs/namei.c:4250
do_unlinkat+0x4c8/0x82c fs/namei.c:4316
__do_sys_unlinkat fs/namei.c:4359 [inline]
__se_sys_unlinkat fs/namei.c:4352 [inline]
__arm64_sys_unlinkat+0xcc/0xfc fs/namei.c:4352
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
irq event stamp: 3482
hardirqs last enabled at (3481): [<ffff80000898bb44>] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:242
hardirqs last disabled at (3482): [<ffff80001245e098>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (3300): [<ffff800008034240>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (3298): [<ffff80000803420c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
object pointer: 0x000000000b8c335f
==================================================================
BUG: KASAN: invalid-free in kfree+0x184/0x228 mm/slab_common.c:1013
Free of addr ffff000142fd15a4 by task syz-executor.5/9389

CPU: 0 PID: 9389 Comm: syz-executor.5 Tainted: G W 6.3.0-rc1-syzkaller-gfe15c26ee26e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__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:319 [inline]
print_report+0x174/0x514 mm/kasan/report.c:430
kasan_report_invalid_free+0xc4/0x114 mm/kasan/report.c:501
__kasan_kfree_large+0xa4/0xc0 mm/kasan/common.c:272
kasan_kfree_large include/linux/kasan.h:170 [inline]
free_large_kmalloc+0x70/0x138 mm/slab_common.c:939
kfree+0x184/0x228 mm/slab_common.c:1013
kvfree+0x40/0x50 mm/util.c:649
ext4_xattr_move_to_block fs/ext4/xattr.c:2680 [inline]
ext4_xattr_make_inode_space fs/ext4/xattr.c:2743 [inline]
ext4_expand_extra_isize_ea+0xcf8/0x1620 fs/ext4/xattr.c:2835
__ext4_expand_extra_isize+0x290/0x348 fs/ext4/inode.c:5955
ext4_try_to_expand_extra_isize fs/ext4/inode.c:5998 [inline]
__ext4_mark_inode_dirty+0x5dc/0xa94 fs/ext4/inode.c:6076
__ext4_unlink+0x768/0x998 fs/ext4/namei.c:3256
ext4_unlink+0x2ec/0xb10 fs/ext4/namei.c:3299
vfs_unlink+0x2f0/0x508 fs/namei.c:4250
do_unlinkat+0x4c8/0x82c fs/namei.c:4316
__do_sys_unlinkat fs/namei.c:4359 [inline]
__se_sys_unlinkat fs/namei.c:4352 [inline]
__arm64_sys_unlinkat+0xcc/0xfc fs/namei.c:4352
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591

The buggy address belongs to the physical page:
page:000000004ed01e6f refcount:2 mapcount:0 mapping:0000000047d3c139 index:0x1 pfn:0x182fd1
memcg:ffff000131a56000
aops:def_blk_aops ino:700005
flags: 0x5ffc0000000203a(referenced|dirty|lru|active|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc0000000203a fffffc0003531048 fffffc0005118988 ffff0000c0497610
raw: 0000000000000001 ffff0000e0738cb0 00000002ffffffff ffff000131a56000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
ffff000142fd1480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff000142fd1500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff000142fd1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
^
ffff000142fd1600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff000142fd1680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================

---
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Next message: Peter Jones: "Re: [PATCH v5 00/27] x86_64: Improvements at compressed kernel stage"
Previous message: Anthony Krowiak: "Re: [PATCH] s390/vfio_ap: fix memory leak in vfio_ap device driver"
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