[syzbot] upstream boot error: BUG: corrupted list in new_inode

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 5d6a0f4da927 Merge tag 'for-linus-6.0-rc1b-tag' of git://g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1399b2f3080000
kernel config: https://syzkaller.appspot.com/x/.config?x=f6bcb425ba129b87
dashboard link: https://syzkaller.appspot.com/bug?extid=24df94a8d05d5a3e68f0
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+24df94...@syzkaller.appspotmail.com

list_add corruption. next->prev should be prev (ffff8881401c0a00), but was ffff000000000000. (next=ffff88801fb50308).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:27!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 24 Comm: kdevtmpfs Not tainted 5.19.0-syzkaller-14374-g5d6a0f4da927 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:__list_add_valid.cold+0xf/0x58 lib/list_debug.c:27
Code: 48 c7 c6 00 ec 48 8a 48 89 ef 49 c7 c7 ea ff ff ff e8 5b 63 05 00 e9 c2 7d b6 fa 4c 89 e1 48 c7 c7 a0 f2 48 8a e8 95 f2 f0 ff <0f> 0b 48 c7 c7 40 f2 48 8a e8 87 f2 f0 ff 0f 0b 48 c7 c7 a0 f1 48
RSP: 0018:ffffc900001efc10 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff8881401c0000 RCX: 0000000000000000
RDX: ffff888012620000 RSI: ffffffff8161f148 RDI: fffff5200003df74
RBP: ffff88801db8b588 R08: 0000000000000075 R09: 0000000000000000
R10: 0000000080000001 R11: 0000000000000000 R12: ffff88801fb50308
R13: ffff88801fb50308 R14: ffff8881401c0000 R15: ffff88801db8b588
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 000000000bc8e000 CR4: 0000000000350ef0
Call Trace:
<TASK>
__list_add include/linux/list.h:69 [inline]
list_add include/linux/list.h:88 [inline]
inode_sb_list_add fs/inode.c:495 [inline]
new_inode+0x114/0x270 fs/inode.c:1049
shmem_get_inode+0x19b/0xe00 mm/shmem.c:2306
shmem_mknod+0x5a/0x1f0 mm/shmem.c:2873
vfs_mknod+0x4d2/0x7e0 fs/namei.c:3892
handle_create+0x340/0x4b3 drivers/base/devtmpfs.c:226
handle drivers/base/devtmpfs.c:391 [inline]
devtmpfs_work_loop drivers/base/devtmpfs.c:406 [inline]
devtmpfsd+0x1a4/0x2a3 drivers/base/devtmpfs.c:448
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid.cold+0xf/0x58 lib/list_debug.c:27
Code: 48 c7 c6 00 ec 48 8a 48 89 ef 49 c7 c7 ea ff ff ff e8 5b 63 05 00 e9 c2 7d b6 fa 4c 89 e1 48 c7 c7 a0 f2 48 8a e8 95 f2 f0 ff <0f> 0b 48 c7 c7 40 f2 48 8a e8 87 f2 f0 ff 0f 0b 48 c7 c7 a0 f1 48
RSP: 0018:ffffc900001efc10 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff8881401c0000 RCX: 0000000000000000
RDX: ffff888012620000 RSI: ffffffff8161f148 RDI: fffff5200003df74
RBP: ffff88801db8b588 R08: 0000000000000075 R09: 0000000000000000
R10: 0000000080000001 R11: 0000000000000000 R12: ffff88801fb50308
R13: ffff88801fb50308 R14: ffff8881401c0000 R15: ffff88801db8b588
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 000000000bc8e000 CR4: 0000000000350ef0


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

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[Guenter Roeck]

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git  fc4d146e8d7d25ef88d409bea1f2e9aff7f30635

[syzbot]

> #syz test https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git

I see the command but can't find the corresponding bug.
Please resend the email to syzbo...@syzkaller.appspotmail.com address
that is the sender of the bug report (also present in the Reported-by tag).

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[Guenter Roeck]

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git fc4d146e8d7d25ef88d409bea1f2e9aff7f30635

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: syzbot+24df94...@syzkaller.appspotmail.com

Tested on:

commit: fc4d146e virtio_net: Revert "virtio_net: set the defau..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git
kernel config: https://syzkaller.appspot.com/x/.config?x=3b9175e0879a7749

dashboard link: https://syzkaller.appspot.com/bug?extid=24df94a8d05d5a3e68f0
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.

[syzbot]

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

failed to create VM pool: failed to create GCE image: create image operation failed: &{Code:PERMISSIONS_ERROR Location: Message:Required 'read' permission for 'disks/ci-upstream-kasan-gce-root-test-job-test-job-image.tar.gz' ForceSendFields:[] NullFields:[]}.

syzkaller build log:
go env (err=<nil>)
GO111MODULE="auto"
GOARCH="amd64"
GOBIN=""
GOCACHE="/syzkaller/.cache/go-build"
GOENV="/syzkaller/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/syzkaller/jobs/linux/gopath/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/syzkaller/jobs/linux/gopath"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.17"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build2326737377=/tmp/go-build -gno-record-gcc-switches"

git status (err=<nil>)
HEAD detached at 8dfcaa3d2
nothing to commit, working tree clean


go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
make .descriptions
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=8dfcaa3d2828a113ae780da01f5f73ad64710e31 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20220812-115356'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-fuzzer github.com/google/syzkaller/syz-fuzzer
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=8dfcaa3d2828a113ae780da01f5f73ad64710e31 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20220812-115356'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=8dfcaa3d2828a113ae780da01f5f73ad64710e31 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20220812-115356'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-stress github.com/google/syzkaller/tools/syz-stress
mkdir -p ./bin/linux_amd64
gcc -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"8dfcaa3d2828a113ae780da01f5f73ad64710e31\"

Tested on:

commit: fc4d146e virtio_net: Revert "virtio_net: set the defau..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git
kernel config: https://syzkaller.appspot.com/x/.config?x=3b9175e0879a7749

dashboard link: https://syzkaller.appspot.com/bug?extid=24df94a8d05d5a3e68f0
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: syzbot+24df94...@syzkaller.appspotmail.com

Tested on:

commit: 568035b0 Linux 6.0-rc1
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git v6.0-rc1

kernel config: https://syzkaller.appspot.com/x/.config?x=3b9175e0879a7749
dashboard link: https://syzkaller.appspot.com/bug?extid=24df94a8d05d5a3e68f0
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

patch: https://syzkaller.appspot.com/x/patch.diff?x=12758a47080000

[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.