Hello,
syzbot found the following issue on:
HEAD commit: 81c325bbf94e kmsan: hooks: do not check memory in kmsan_in..
git tree: https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=11473f2db00000
kernel config: https://syzkaller.appspot.com/x/.config?x=2d8b9a11641dc9aa
dashboard link: https://syzkaller.appspot.com/bug?extid=11542230634289d7f1f6
compiler: clang version 14.0.0 (/usr/local/google/src/llvm-git-monorepo 2b554920f11c8b763cd9ed9003f4e19b919b8e1f), GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: i386
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]
syz-executor.0 (pid 3634) is setting deprecated v1 encryption policy; recommend upgrading to v2.
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BUG: KMSAN: uninit-value in ext4_inode_journal_mode+0x29f/0x510 fs/ext4/ext4_jbd2.c:16
ext4_inode_journal_mode+0x29f/0x510 fs/ext4/ext4_jbd2.c:16
ext4_should_journal_data fs/ext4/ext4_jbd2.h:465 [inline]
ext4_evict_inode+0x1b5/0x2d10 fs/ext4/inode.c:202
evict+0x4f4/0xdd0 fs/inode.c:590
iput_final fs/inode.c:1670 [inline]
iput+0xc53/0x1100 fs/inode.c:1696
__ext4_new_inode+0xf32/0x8440 fs/ext4/ialloc.c:1362
ext4_create+0x455/0x940 fs/ext4/namei.c:2746
lookup_open fs/namei.c:3280 [inline]
open_last_lookups fs/namei.c:3350 [inline]
path_openat+0x2e88/0x5ea0 fs/namei.c:3556
do_filp_open+0x306/0x760 fs/namei.c:3586
do_sys_openat2+0x263/0x8f0 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_creat fs/open.c:1304 [inline]
__se_sys_creat fs/open.c:1298 [inline]
__ia32_sys_creat+0x122/0x1a0 fs/open.c:1298
do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline]
__do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:180
do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205
do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
Uninit was created at:
__alloc_pages+0xbbf/0x1090 mm/page_alloc.c:5409
alloc_pages+0x8a5/0xb80
alloc_slab_page mm/slub.c:1810 [inline]
allocate_slab+0x287/0x1c10 mm/slub.c:1947
new_slab mm/slub.c:2010 [inline]
___slab_alloc+0xb85/0x1e30 mm/slub.c:3039
__slab_alloc mm/slub.c:3126 [inline]
slab_alloc_node mm/slub.c:3217 [inline]
slab_alloc mm/slub.c:3259 [inline]
kmem_cache_alloc+0xbb3/0x11c0 mm/slub.c:3264
ext4_alloc_inode+0x5e/0x870 fs/ext4/super.c:1295
alloc_inode fs/inode.c:235 [inline]
new_inode_pseudo+0xa6/0x5a0 fs/inode.c:944
new_inode+0x5a/0x3c0 fs/inode.c:973
__ext4_new_inode+0x3cb/0x8440 fs/ext4/ialloc.c:960
ext4_mkdir+0x623/0x1870 fs/ext4/namei.c:2929
vfs_mkdir+0x8ca/0xba0 fs/namei.c:3883
do_mkdirat+0x3f5/0x8e0 fs/namei.c:3909
__do_sys_mkdirat fs/namei.c:3924 [inline]
__se_sys_mkdirat fs/namei.c:3922 [inline]
__x64_sys_mkdirat+0x11a/0x160 fs/namei.c:3922
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x44/0xae
CPU: 0 PID: 3634 Comm: syz-executor.0 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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