[syzbot] [erofs?] KMSAN: uninit-value in z_erofs_lz4_decompress (3)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 9f8413c4a66f Merge tag 'cgroup-for-6.8' of git://git.kerne..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=13d26b1fe80000
kernel config: https://syzkaller.appspot.com/x/.config?x=656820e61b758b15
dashboard link: https://syzkaller.appspot.com/bug?extid=88ad8b0517a9d3bb9dc8
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11377218180000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=111fd038180000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/79d9f2f4b065/disk-9f8413c4.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/cbc68430d9c6/vmlinux-9f8413c4.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9740ad9fc172/bzImage-9f8413c4.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/2f79f30d7608/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+88ad8b...@syzkaller.appspotmail.com

erofs: (device loop0): z_erofs_lz4_decompress_mem: failed to decompress -42 in[46, 0] out[9000]
=====================================================
BUG: KMSAN: uninit-value in hex_dump_to_buffer+0xae9/0x10f0 lib/hexdump.c:194
hex_dump_to_buffer+0xae9/0x10f0 lib/hexdump.c:194
print_hex_dump+0x13d/0x3e0 lib/hexdump.c:276
z_erofs_lz4_decompress_mem fs/erofs/decompressor.c:252 [inline]
z_erofs_lz4_decompress+0x257e/0x2a70 fs/erofs/decompressor.c:311
z_erofs_decompress_pcluster fs/erofs/zdata.c:1290 [inline]
z_erofs_decompress_queue+0x338c/0x6460 fs/erofs/zdata.c:1372
z_erofs_decompressqueue_work+0x57/0x70 fs/erofs/zdata.c:1387
process_one_work kernel/workqueue.c:2633 [inline]
process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2706
worker_thread+0xf45/0x1490 kernel/workqueue.c:2787
kthread+0x3ed/0x540 kernel/kthread.c:388
ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242

Uninit was created at:
__alloc_pages+0x9a4/0xe00 mm/page_alloc.c:4591
alloc_pages_mpol+0x62b/0x9d0 mm/mempolicy.c:2133
alloc_pages mm/mempolicy.c:2204 [inline]
folio_alloc+0x1da/0x380 mm/mempolicy.c:2211
filemap_alloc_folio+0xa5/0x430 mm/filemap.c:974
page_cache_ra_unbounded+0x2cc/0x960 mm/readahead.c:247
do_page_cache_ra mm/readahead.c:299 [inline]
page_cache_ra_order+0xfeb/0x10a0 mm/readahead.c:546
ondemand_readahead+0x132b/0x1710 mm/readahead.c:668
page_cache_sync_ra+0x724/0x760 mm/readahead.c:695
page_cache_sync_readahead include/linux/pagemap.h:1283 [inline]
filemap_get_pages+0x4c7/0x2c90 mm/filemap.c:2497
filemap_read+0x59e/0x14d0 mm/filemap.c:2593
generic_file_read_iter+0x136/0xad0 mm/filemap.c:2781
__kernel_read+0x3bb/0x9e0 fs/read_write.c:434
integrity_kernel_read+0x77/0x90 security/integrity/iint.c:221
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:485 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
ima_calc_file_hash+0x1743/0x3cc0 security/integrity/ima/ima_crypto.c:573
ima_collect_measurement+0x44d/0xdd0 security/integrity/ima/ima_api.c:290
process_measurement+0x2936/0x3ef0 security/integrity/ima/ima_main.c:359
ima_file_check+0xb3/0x100 security/integrity/ima/ima_main.c:557
do_open fs/namei.c:3624 [inline]
path_openat+0x4d05/0x5ac0 fs/namei.c:3779
do_filp_open+0x20d/0x590 fs/namei.c:3806
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1404
do_sys_open fs/open.c:1419 [inline]
__do_sys_open fs/open.c:1427 [inline]
__se_sys_open fs/open.c:1423 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1423
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b

CPU: 0 PID: 4393 Comm: kworker/u5:1 Not tainted 6.7.0-syzkaller-00562-g9f8413c4a66f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: erofs_worker z_erofs_decompressqueue_work
=====================================================


---
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.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

[Edward Adam Davis]

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

diff --git a/fs/erofs/decompressor.c b/fs/erofs/decompressor.c
index 021be5feb1bc..8ac3f96676c4 100644
--- a/fs/erofs/decompressor.c
+++ b/fs/erofs/decompressor.c
@@ -250,7 +250,8 @@ static int z_erofs_lz4_decompress_mem(struct z_erofs_lz4_decompress_ctx *ctx,
print_hex_dump(KERN_DEBUG, "[ in]: ", DUMP_PREFIX_OFFSET,
16, 1, src + inputmargin, rq->inputsize, true);
print_hex_dump(KERN_DEBUG, "[out]: ", DUMP_PREFIX_OFFSET,
- 16, 1, out, rq->outputsize, true);
+ 16, 1, out, (ret < 0 && rq->inputsize > 0) ?
+ (ret + rq->inputsize) : rq->outputsize, true);

if (ret >= 0)
memset(out + ret, 0, rq->outputsize - ret);

[syzbot]

Hello,

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

failed to apply patch:
checking file fs/erofs/decompressor.c
Hunk #1 FAILED at 250.
1 out of 1 hunk FAILED



Tested on:

commit: 6764c317 Merge tag 'scsi-fixes' of git://git.kernel.or..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

kernel config: https://syzkaller.appspot.com/x/.config?x=656820e61b758b15
dashboard link: https://syzkaller.appspot.com/bug?extid=88ad8b0517a9d3bb9dc8
compiler:

patch: https://syzkaller.appspot.com/x/patch.diff?x=12541988180000

[Gao Xiang]

#syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

[syzbot]

Hello,

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

[ T1] NFS: Registering the id_resolver key type
[ 20.847533][ T1] Key type id_resolver registered
[ 20.852991][ T1] Key type id_legacy registered
[ 20.859477][ T1] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[ 20.868251][ T1] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
[ 20.901326][ T1] Key type cifs.spnego registered
[ 20.907727][ T1] Key type cifs.idmap registered
[ 20.917413][ T1] ntfs: driver 2.1.32 [Flags: R/W].
[ 20.923298][ T1] ntfs3: Max link count 4000
[ 20.928297][ T1] ntfs3: Enabled Linux POSIX ACLs support
[ 20.934148][ T1] ntfs3: Read-only LZX/Xpress compression included
[ 20.941172][ T1] efs: 1.0a - http://aeschi.ch.eu.org/efs/
[ 20.947393][ T1] romfs: ROMFS MTD (C) 2007 Red Hat, Inc.
[ 20.953397][ T1] QNX4 filesystem 0.2.3 registered.
[ 20.958982][ T1] qnx6: QNX6 filesystem 1.0.0 registered.
[ 20.965985][ T1] fuse: init (API version 7.39)
[ 20.976858][ T1] orangefs_debugfs_init: called with debug mask: :none: :0:
[ 20.985505][ T1] orangefs_init: module version upstream loaded
[ 20.993572][ T1] JFS: nTxBlock = 8192, nTxLock = 65536
[ 21.034087][ T1] SGI XFS with ACLs, security attributes, realtime, quota, no debug enabled
[ 21.051635][ T1] 9p: Installing v9fs 9p2000 file system support
[ 21.058997][ T1] NILFS version 2 loaded
[ 21.063484][ T1] befs: version: 0.9.3
[ 21.068879][ T1] ocfs2: Registered cluster interface o2cb
[ 21.075961][ T1] ocfs2: Registered cluster interface user
[ 21.083257][ T1] OCFS2 User DLM kernel interface loaded
[ 21.102750][ T1] gfs2: GFS2 installed
[ 21.142225][ T1] ceph: loaded (mds proto 32)
[ 25.265679][ T1] NET: Registered PF_ALG protocol family
[ 25.271965][ T1] xor: automatically using best checksumming function avx
[ 25.280055][ T1] async_tx: api initialized (async)
[ 25.285498][ T1] Key type asymmetric registered
[ 25.290927][ T1] Asymmetric key parser 'x509' registered
[ 25.296825][ T1] Asymmetric key parser 'pkcs8' registered
[ 25.302732][ T1] Key type pkcs7_test registered
[ 25.308482][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 240)
[ 25.318600][ T1] io scheduler mq-deadline registered
[ 25.324054][ T1] io scheduler kyber registered
[ 25.331126][ T1] io scheduler bfq registered
[ 25.347558][ T1] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[ 25.363347][ T136] kworker/u4:0 (136) used greatest stack depth: 11000 bytes left
[ 25.374100][ T1] ACPI: button: Power Button [PWRF]
[ 25.381760][ T1] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
[ 25.392277][ T1] ACPI: button: Sleep Button [SLPF]
[ 25.414526][ T1] ioatdma: Intel(R) QuickData Technology Driver 5.00
[ 25.499231][ T1] ACPI: \_SB_.LNKC: Enabled at IRQ 11
[ 25.505226][ T1] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
[ 25.579195][ T1] ACPI: \_SB_.LNKD: Enabled at IRQ 10
[ 25.585070][ T1] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
[ 25.662347][ T1] ACPI: \_SB_.LNKB: Enabled at IRQ 10
[ 25.668284][ T1] virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
[ 25.725221][ T1] virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
[ 26.750369][ T1] N_HDLC line discipline registered with maxframe=4096
[ 26.758188][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 26.770021][ T1] 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[ 26.799322][ T1] 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[ 26.828884][ T1] 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
[ 26.856640][ T1] 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
[ 26.903869][ T1] Non-volatile memory driver v1.3
[ 26.925949][ T1] Linux agpgart interface v0.103
[ 26.944845][ T1] ACPI: bus type drm_connector registered
[ 26.963460][ T1] [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
[ 26.985308][ T1] [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1
[ 27.457414][ T1] Console: switching to colour frame buffer device 128x48
[ 27.612960][ T1] platform vkms: [drm] fb0: vkmsdrmfb frame buffer device
[ 27.621207][ T1] usbcore: registered new interface driver udl
[ 27.785853][ T1] brd: module loaded
[ 27.962515][ T1] loop: module loaded
[ 28.204419][ T1] zram: Added device: zram0
[ 28.227930][ T1] null_blk: disk nullb0 created
[ 28.232984][ T1] null_blk: module loaded
[ 28.238841][ T1] Guest personality initialized and is inactive
[ 28.247691][ T1] VMCI host device registered (name=vmci, major=10, minor=118)
[ 28.255558][ T1] Initialized host personality
[ 28.261000][ T1] usbcore: registered new interface driver rtsx_usb
[ 28.269847][ T1] usbcore: registered new interface driver viperboard
[ 28.277538][ T1] usbcore: registered new interface driver dln2
[ 28.284724][ T1] usbcore: registered new interface driver pn533_usb
[ 28.297696][ T1] nfcsim 0.2 initialized
[ 28.302508][ T1] usbcore: registered new interface driver port100
[ 28.309540][ T1] usbcore: registered new interface driver nfcmrvl
[ 28.325751][ T1] Loading iSCSI transport class v2.0-870.
[ 28.358008][ T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
[ 28.395519][ T1] scsi host0: Virtio SCSI HBA
[ 28.917048][ T1] st: Version 20160209, fixed bufsize 32768, s/g segs 256
[ 28.933542][ T11] scsi 0:0:1:0: Direct-Access Google PersistentDisk 1 PQ: 0 ANSI: 6
[ 28.978523][ T1] Rounding down aligned max_sectors from 4294967295 to 4294967288
[ 28.988652][ T1] db_root: cannot open: /etc/target
[ 29.035870][ T1] =====================================================
[ 29.036118][ T1] BUG: KMSAN: use-after-free in __list_del_entry_valid_or_report+0x19e/0x490
[ 29.036138][ T1] __list_del_entry_valid_or_report+0x19e/0x490
[ 29.036138][ T1] stack_depot_save_flags+0x3e7/0x7b0
[ 29.036138][ T1] stack_depot_save+0x12/0x20
[ 29.036138][ T1] ref_tracker_alloc+0x215/0x700
[ 29.036138][ T1] netdev_hold+0xe2/0x120
[ 29.036138][ T1] register_netdevice+0x1bc7/0x2170
[ 29.036138][ T1] bond_create+0x138/0x2a0
[ 29.036138][ T1] bonding_init+0x1a7/0x2d0
[ 29.036138][ T1] do_one_initcall+0x216/0x960
[ 29.036138][ T1] do_initcall_level+0x140/0x350
[ 29.036138][ T1] do_initcalls+0xf0/0x1d0
[ 29.036138][ T1] do_basic_setup+0x22/0x30
[ 29.036138][ T1] kernel_init_freeable+0x300/0x4b0
[ 29.036138][ T1] kernel_init+0x2f/0x7e0
[ 29.036138][ T1] ret_from_fork+0x66/0x80
[ 29.036138][ T1] ret_from_fork_asm+0x11/0x20
[ 29.036138][ T1]
[ 29.036138][ T1] Uninit was created at:
[ 29.036138][ T1] free_unref_page_prepare+0xc1/0xad0
[ 29.036138][ T1] free_unref_page+0x58/0x6d0
[ 29.036138][ T1] __free_pages+0xb1/0x1f0
[ 29.036138][ T1] thread_stack_free_rcu+0x97/0xb0
[ 29.036138][ T1] rcu_core+0xa3c/0x1df0
[ 29.036138][ T1] rcu_core_si+0x12/0x20
[ 29.036138][ T1] __do_softirq+0x1b7/0x7c3
[ 29.036138][ T1]
[ 29.036138][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-rc2-syzkaller-g6764c317b6bb #0
[ 29.036138][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
[ 29.036138][ T1] =====================================================
[ 29.036138][ T1] Disabling lock debugging due to kernel taint
[ 29.036138][ T1] Kernel panic - not syncing: kmsan.panic set ...
[ 29.036138][ T1] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G B 6.8.0-rc2-syzkaller-g6764c317b6bb #0
[ 29.036138][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
[ 29.036138][ T1] Call Trace:
[ 29.036138][ T1] <TASK>
[ 29.036138][ T1] dump_stack_lvl+0x1bf/0x240
[ 29.036138][ T1] dump_stack+0x1e/0x20
[ 29.036138][ T1] panic+0x4de/0xc90
[ 29.036138][ T1] kmsan_report+0x2d0/0x2d0
[ 29.036138][ T1] ? cleanup_uevent_env+0x30/0x50
[ 29.036138][ T1] ? netdev_queue_update_kobjects+0x3f5/0x870
[ 29.036138][ T1] ? netdev_register_kobject+0x41e/0x520
[ 29.036138][ T1] ? register_netdevice+0x198f/0x2170
[ 29.036138][ T1] ? __msan_warning+0x96/0x110
[ 29.036138][ T1] ? __list_del_entry_valid_or_report+0x19e/0x490
[ 29.036138][ T1] ? stack_depot_save_flags+0x3e7/0x7b0
[ 29.036138][ T1] ? stack_depot_save+0x12/0x20
[ 29.036138][ T1] ? ref_tracker_alloc+0x215/0x700
[ 29.036138][ T1] ? netdev_hold+0xe2/0x120
[ 29.036138][ T1] ? register_netdevice+0x1bc7/0x2170
[ 29.036138][ T1] ? bond_create+0x138/0x2a0
[ 29.036138][ T1] ? bonding_init+0x1a7/0x2d0
[ 29.036138][ T1] ? do_one_initcall+0x216/0x960
[ 29.036138][ T1] ? do_initcall_level+0x140/0x350
[ 29.036138][ T1] ? do_initcalls+0xf0/0x1d0
[ 29.036138][ T1] ? do_basic_setup+0x22/0x30
[ 29.036138][ T1] ? kernel_init_freeable+0x300/0x4b0
[ 29.036138][ T1] ? kernel_init+0x2f/0x7e0
[ 29.036138][ T1] ? ret_from_fork+0x66/0x80
[ 29.036138][ T1] ? ret_from_fork_asm+0x11/0x20
[ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 29.036138][ T1] ? filter_irq_stacks+0x60/0x1a0
[ 29.036138][ T1] ? stack_depot_save_flags+0x2c/0x7b0
[ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 29.036138][ T1] __msan_warning+0x96/0x110
[ 29.036138][ T1] __list_del_entry_valid_or_report+0x19e/0x490
[ 29.036138][ T1] stack_depot_save_flags+0x3e7/0x7b0
[ 29.036138][ T1] stack_depot_save+0x12/0x20
[ 29.036138][ T1] ref_tracker_alloc+0x215/0x700
[ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 29.036138][ T1] ? netdev_hold+0xe2/0x120
[ 29.036138][ T1] ? register_netdevice+0x1bc7/0x2170
[ 29.036138][ T1] ? bond_create+0x138/0x2a0
[ 29.036138][ T1] ? bonding_init+0x1a7/0x2d0
[ 29.036138][ T1] ? do_one_initcall+0x216/0x960
[ 29.036138][ T1] ? do_initcall_level+0x140/0x350
[ 29.036138][ T1] ? do_initcalls+0xf0/0x1d0
[ 29.036138][ T1] ? do_basic_setup+0x22/0x30
[ 29.036138][ T1] ? kernel_init_freeable+0x300/0x4b0
[ 29.036138][ T1] ? kernel_init+0x2f/0x7e0
[ 29.036138][ T1] ? ret_from_fork+0x66/0x80
[ 29.036138][ T1] ? ret_from_fork_asm+0x11/0x20
[ 29.036138][ T1] ? kmsan_internal_unpoison_memory+0x14/0x20
[ 29.036138][ T1] netdev_hold+0xe2/0x120
[ 29.036138][ T1] register_netdevice+0x1bc7/0x2170
[ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 29.036138][ T1] bond_create+0x138/0x2a0
[ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 29.036138][ T1] bonding_init+0x1a7/0x2d0
[ 29.036138][ T1] ? spi_dln2_driver_init+0x40/0x40
[ 29.036138][ T1] do_one_initcall+0x216/0x960
[ 29.036138][ T1] ? spi_dln2_driver_init+0x40/0x40
[ 29.036138][ T1] ? kmsan_get_metadata+0x60/0x1c0
[ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 29.036138][ T1] ? filter_irq_stacks+0x60/0x1a0
[ 29.036138][ T1] ? stack_depot_save_flags+0x2c/0x7b0
[ 29.036138][ T1] ? skip_spaces+0x8f/0xc0
[ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 29.036138][ T1] ? parse_args+0x1511/0x15e0
[ 29.036138][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 29.036138][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 29.036138][ T1] ? spi_dln2_driver_init+0x40/0x40
[ 29.036138][ T1] do_initcall_level+0x140/0x350
[ 29.036138][ T1] do_initcalls+0xf0/0x1d0
[ 29.036138][ T1] ? arch_cpuhp_init_parallel_bringup+0xe0/0xe0
[ 29.036138][ T1] do_basic_setup+0x22/0x30
[ 29.036138][ T1] kernel_init_freeable+0x300/0x4b0
[ 29.036138][ T1] ? rest_init+0x260/0x260
[ 29.036138][ T1] kernel_init+0x2f/0x7e0
[ 29.036138][ T1] ? rest_init+0x260/0x260
[ 29.036138][ T1] ret_from_fork+0x66/0x80
[ 29.036138][ T1] ? rest_init+0x260/0x260
[ 29.036138][ T1] ret_from_fork_asm+0x11/0x20
[ 29.036138][ T1] </TASK>
[ 29.036138][ T1] Kernel Offset: disabled


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-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.21.4'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build2170902610=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at 373b66cd2
nothing to commit, working tree clean


tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:32: run command via tools/syz-env for best compatibility, see:
Makefile:33: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=373b66cd2ba1fd05c72d0bbe16141fb287fe2eb3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240130-131205'" "-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=373b66cd2ba1fd05c72d0bbe16141fb287fe2eb3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240130-131205'" "-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=373b66cd2ba1fd05c72d0bbe16141fb287fe2eb3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240130-131205'" "-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 -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"373b66cd2ba1fd05c72d0bbe16141fb287fe2eb3\"


Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=12b5bad3e80000

Tested on:

commit: 6764c317 Merge tag 'scsi-fixes' of git://git.kernel.or..

git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=f8b2756f2e75608e

dashboard link: https://syzkaller.appspot.com/bug?extid=88ad8b0517a9d3bb9dc8
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.

[Edward Adam Davis]

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

diff --git a/fs/erofs/decompressor.c b/fs/erofs/decompressor.c
index 021be5feb1bc..8ac3f96676c4 100644
--- a/fs/erofs/decompressor.c
+++ b/fs/erofs/decompressor.c

@@ -252,7 +252,8 @@ static int z_erofs_lz4_decompress_mem(struct z_erofs_lz4_decompress_ctx *ctx,

[syzbot]

Hello,

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

failed to apply patch:
checking file fs/erofs/decompressor.c

Hunk #1 FAILED at 252.

1 out of 1 hunk FAILED



Tested on:

commit: 02153319 Kconfig: Disable -Wstringop-overflow for GCC ..

git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
kernel config: https://syzkaller.appspot.com/x/.config?x=656820e61b758b15

dashboard link: https://syzkaller.appspot.com/bug?extid=88ad8b0517a9d3bb9dc8
compiler:

patch: https://syzkaller.appspot.com/x/patch.diff?x=15eb0838180000

[Gao Xiang]

#syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

[syzbot]

Hello,

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

le Layout Driver Registering...
[ 21.855653][ T1] Key type cifs.spnego registered
[ 21.862292][ T1] Key type cifs.idmap registered
[ 21.872039][ T1] ntfs: driver 2.1.32 [Flags: R/W].
[ 21.878069][ T1] ntfs3: Max link count 4000
[ 21.882711][ T1] ntfs3: Enabled Linux POSIX ACLs support
[ 21.888528][ T1] ntfs3: Read-only LZX/Xpress compression included
[ 21.895581][ T1] efs: 1.0a - http://aeschi.ch.eu.org/efs/
[ 21.902312][ T1] romfs: ROMFS MTD (C) 2007 Red Hat, Inc.
[ 21.908626][ T1] QNX4 filesystem 0.2.3 registered.
[ 21.914220][ T1] qnx6: QNX6 filesystem 1.0.0 registered.
[ 21.921782][ T1] fuse: init (API version 7.39)
[ 21.933923][ T1] orangefs_debugfs_init: called with debug mask: :none: :0:
[ 21.943462][ T1] orangefs_init: module version upstream loaded
[ 21.951611][ T1] JFS: nTxBlock = 8192, nTxLock = 65536
[ 21.993328][ T1] SGI XFS with ACLs, security attributes, realtime, quota, no debug enabled
[ 22.010587][ T1] 9p: Installing v9fs 9p2000 file system support
[ 22.019170][ T1] NILFS version 2 loaded
[ 22.023764][ T1] befs: version: 0.9.3
[ 22.029409][ T1] ocfs2: Registered cluster interface o2cb
[ 22.037323][ T1] ocfs2: Registered cluster interface user
[ 22.046089][ T1] OCFS2 User DLM kernel interface loaded
[ 22.066046][ T1] gfs2: GFS2 installed
[ 22.107156][ T1] ceph: loaded (mds proto 32)
[ 26.347423][ T1] NET: Registered PF_ALG protocol family
[ 26.353728][ T1] xor: automatically using best checksumming function avx
[ 26.361905][ T1] async_tx: api initialized (async)
[ 26.367588][ T1] Key type asymmetric registered
[ 26.372680][ T1] Asymmetric key parser 'x509' registered
[ 26.378760][ T1] Asymmetric key parser 'pkcs8' registered
[ 26.385472][ T1] Key type pkcs7_test registered
[ 26.391779][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 240)
[ 26.402387][ T1] io scheduler mq-deadline registered
[ 26.408181][ T1] io scheduler kyber registered
[ 26.413686][ T1] io scheduler bfq registered
[ 26.431031][ T1] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[ 26.451191][ T1] ACPI: button: Power Button [PWRF]
[ 26.459719][ T1] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
[ 26.470238][ T1] ACPI: button: Sleep Button [SLPF]
[ 26.470487][ T145] kworker/u4:6 (145) used greatest stack depth: 11288 bytes left
[ 26.501185][ T1] ioatdma: Intel(R) QuickData Technology Driver 5.00
[ 26.590018][ T1] ACPI: \_SB_.LNKC: Enabled at IRQ 11
[ 26.596923][ T1] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
[ 26.684933][ T1] ACPI: \_SB_.LNKD: Enabled at IRQ 10
[ 26.691887][ T1] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
[ 26.769222][ T1] ACPI: \_SB_.LNKB: Enabled at IRQ 10
[ 26.775072][ T1] virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
[ 26.834501][ T1] virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
[ 26.964774][ T227] kworker/u4:4 (227) used greatest stack depth: 11000 bytes left
[ 27.025559][ T254] kworker/u4:4 (254) used greatest stack depth: 10880 bytes left
[ 27.967136][ T1] N_HDLC line discipline registered with maxframe=4096
[ 27.975904][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 27.992699][ T1] 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[ 28.026200][ T1] 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[ 28.059406][ T1] 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
[ 28.089449][ T1] 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
[ 28.140541][ T1] Non-volatile memory driver v1.3
[ 28.170442][ T1] Linux agpgart interface v0.103
[ 28.189648][ T1] ACPI: bus type drm_connector registered
[ 28.207115][ T1] [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
[ 28.229973][ T1] [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1
[ 28.724393][ T1] Console: switching to colour frame buffer device 128x48
[ 28.875767][ T1] platform vkms: [drm] fb0: vkmsdrmfb frame buffer device
[ 28.884404][ T1] usbcore: registered new interface driver udl
[ 29.061297][ T1] brd: module loaded
[ 29.244400][ T1] loop: module loaded
[ 29.512400][ T1] zram: Added device: zram0
[ 29.540501][ T1] null_blk: disk nullb0 created
[ 29.545733][ T1] null_blk: module loaded
[ 29.551941][ T1] Guest personality initialized and is inactive
[ 29.560955][ T1] VMCI host device registered (name=vmci, major=10, minor=118)
[ 29.569840][ T1] Initialized host personality
[ 29.575750][ T1] usbcore: registered new interface driver rtsx_usb
[ 29.585633][ T1] usbcore: registered new interface driver viperboard
[ 29.594432][ T1] usbcore: registered new interface driver dln2
[ 29.602202][ T1] usbcore: registered new interface driver pn533_usb
[ 29.616932][ T1] nfcsim 0.2 initialized
[ 29.622086][ T1] usbcore: registered new interface driver port100
[ 29.629914][ T1] usbcore: registered new interface driver nfcmrvl
[ 29.648231][ T1] Loading iSCSI transport class v2.0-870.
[ 29.684669][ T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
[ 29.731303][ T1] scsi host0: Virtio SCSI HBA
[ 30.283396][ T1] st: Version 20160209, fixed bufsize 32768, s/g segs 256
[ 30.301725][ T72] scsi 0:0:1:0: Direct-Access Google PersistentDisk 1 PQ: 0 ANSI: 6
[ 30.344813][ T1] Rounding down aligned max_sectors from 4294967295 to 4294967288
[ 30.362347][ T1] db_root: cannot open: /etc/target
[ 30.395006][ T1] =====================================================
[ 30.395260][ T1] BUG: KMSAN: use-after-free in __list_del_entry_valid_or_report+0x19e/0x490
[ 30.395432][ T1] __list_del_entry_valid_or_report+0x19e/0x490
[ 30.395596][ T1] stack_depot_save_flags+0x3e7/0x7b0
[ 30.395700][ T1] stack_depot_save+0x12/0x20
[ 30.395793][ T1] ref_tracker_alloc+0x215/0x700
[ 30.395890][ T1] netdev_queue_update_kobjects+0x256/0x870
[ 30.396031][ T1] netdev_register_kobject+0x41e/0x520
[ 30.396149][ T1] register_netdevice+0x198f/0x2170
[ 30.396264][ T1] bond_create+0x138/0x2a0
[ 30.396406][ T1] bonding_init+0x1a7/0x2d0
[ 30.396505][ T1] do_one_initcall+0x216/0x960
[ 30.396640][ T1] do_initcall_level+0x140/0x350
[ 30.396748][ T1] do_initcalls+0xf0/0x1d0
[ 30.396848][ T1] do_basic_setup+0x22/0x30
[ 30.396959][ T1] kernel_init_freeable+0x300/0x4b0
[ 30.397071][ T1] kernel_init+0x2f/0x7e0
[ 30.397189][ T1] ret_from_fork+0x66/0x80
[ 30.397216][ T1] ret_from_fork_asm+0x11/0x20
[ 30.397216][ T1]
[ 30.397216][ T1] Uninit was created at:
[ 30.397216][ T1] free_unref_page_prepare+0xc1/0xad0
[ 30.397216][ T1] free_unref_page+0x58/0x6d0
[ 30.397216][ T1] __free_pages+0xb1/0x1f0
[ 30.397216][ T1] thread_stack_free_rcu+0x97/0xb0
[ 30.397216][ T1] rcu_core+0xa3c/0x1df0
[ 30.397216][ T1] rcu_core_si+0x12/0x20
[ 30.397216][ T1] __do_softirq+0x1b7/0x7c3
[ 30.397216][ T1]
[ 30.397216][ T1] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.8.0-rc5-syzkaller-gb401b621758e #0
[ 30.397216][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
[ 30.397216][ T1] =====================================================
[ 30.397216][ T1] Disabling lock debugging due to kernel taint
[ 30.397216][ T1] Kernel panic - not syncing: kmsan.panic set ...
[ 30.397216][ T1] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G B 6.8.0-rc5-syzkaller-gb401b621758e #0
[ 30.397216][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
[ 30.397216][ T1] Call Trace:
[ 30.397216][ T1] <TASK>
[ 30.397216][ T1] dump_stack_lvl+0x1bf/0x240
[ 30.397216][ T1] dump_stack+0x1e/0x20
[ 30.397216][ T1] panic+0x4de/0xc90
[ 30.397216][ T1] kmsan_report+0x2d0/0x2d0
[ 30.397216][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 30.397216][ T1] ? __msan_warning+0x96/0x110
[ 30.397216][ T1] ? __list_del_entry_valid_or_report+0x19e/0x490
[ 30.397216][ T1] ? stack_depot_save_flags+0x3e7/0x7b0
[ 30.397216][ T1] ? stack_depot_save+0x12/0x20
[ 30.397216][ T1] ? ref_tracker_alloc+0x215/0x700
[ 30.397216][ T1] ? netdev_queue_update_kobjects+0x256/0x870
[ 30.397216][ T1] ? netdev_register_kobject+0x41e/0x520
[ 30.397216][ T1] ? register_netdevice+0x198f/0x2170
[ 30.397216][ T1] ? bond_create+0x138/0x2a0
[ 30.397216][ T1] ? bonding_init+0x1a7/0x2d0
[ 30.397216][ T1] ? do_one_initcall+0x216/0x960
[ 30.397216][ T1] ? do_initcall_level+0x140/0x350
[ 30.397216][ T1] ? do_initcalls+0xf0/0x1d0
[ 30.397216][ T1] ? do_basic_setup+0x22/0x30
[ 30.397216][ T1] ? kernel_init_freeable+0x300/0x4b0
[ 30.397216][ T1] ? kernel_init+0x2f/0x7e0
[ 30.397216][ T1] ? ret_from_fork+0x66/0x80
[ 30.397216][ T1] ? ret_from_fork_asm+0x11/0x20
[ 30.397216][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 30.397216][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 30.397216][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 30.397216][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 30.397216][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 30.397216][ T1] ? _raw_spin_lock_irqsave+0x35/0xc0
[ 30.397216][ T1] ? filter_irq_stacks+0x60/0x1a0
[ 30.397216][ T1] ? stack_depot_save_flags+0x2c/0x7b0
[ 30.397216][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 30.397216][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 30.397216][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 30.397216][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 30.397216][ T1] __msan_warning+0x96/0x110
[ 30.397216][ T1] __list_del_entry_valid_or_report+0x19e/0x490
[ 30.397216][ T1] stack_depot_save_flags+0x3e7/0x7b0
[ 30.397216][ T1] stack_depot_save+0x12/0x20
[ 30.397216][ T1] ref_tracker_alloc+0x215/0x700
[ 30.397216][ T1] ? netdev_queue_update_kobjects+0x256/0x870
[ 30.397216][ T1] ? netdev_register_kobject+0x41e/0x520
[ 30.397216][ T1] ? register_netdevice+0x198f/0x2170
[ 30.397216][ T1] ? bond_create+0x138/0x2a0
[ 30.397216][ T1] ? bonding_init+0x1a7/0x2d0
[ 30.397216][ T1] ? do_one_initcall+0x216/0x960
[ 30.397216][ T1] ? do_initcall_level+0x140/0x350
[ 30.397216][ T1] ? do_initcalls+0xf0/0x1d0
[ 30.397216][ T1] ? do_basic_setup+0x22/0x30
[ 30.397216][ T1] ? kernel_init_freeable+0x300/0x4b0
[ 30.397216][ T1] ? kernel_init+0x2f/0x7e0
[ 30.397216][ T1] ? ret_from_fork+0x66/0x80
[ 30.397216][ T1] ? ret_from_fork_asm+0x11/0x20
[ 30.397216][ T1] ? kmsan_internal_unpoison_memory+0x14/0x20
[ 30.397216][ T1] netdev_queue_update_kobjects+0x256/0x870
[ 30.397216][ T1] netdev_register_kobject+0x41e/0x520
[ 30.397216][ T1] register_netdevice+0x198f/0x2170
[ 30.397216][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 30.397216][ T1] bond_create+0x138/0x2a0
[ 30.397216][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 30.397216][ T1] bonding_init+0x1a7/0x2d0
[ 30.397216][ T1] ? spi_dln2_driver_init+0x40/0x40
[ 30.397216][ T1] do_one_initcall+0x216/0x960
[ 30.397216][ T1] ? spi_dln2_driver_init+0x40/0x40
[ 30.397216][ T1] ? kmsan_get_metadata+0xb0/0x1c0
[ 30.397216][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 30.397216][ T1] ? filter_irq_stacks+0x60/0x1a0
[ 30.397216][ T1] ? stack_depot_save_flags+0x2c/0x7b0
[ 30.407722][ T1] ? skip_spaces+0x8f/0xc0
[ 30.407722][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 30.407922][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 30.407922][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 30.407922][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 30.407922][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 30.407922][ T1] ? parse_args+0x1511/0x15e0
[ 30.407922][ T1] ? kmsan_get_metadata+0x146/0x1c0
[ 30.407922][ T1] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0
[ 30.407922][ T1] ? spi_dln2_driver_init+0x40/0x40
[ 30.408958][ T1] do_initcall_level+0x140/0x350
[ 30.408958][ T1] do_initcalls+0xf0/0x1d0
[ 30.408958][ T1] ? arch_cpuhp_init_parallel_bringup+0xe0/0xe0
[ 30.408958][ T1] do_basic_setup+0x22/0x30
[ 30.408958][ T1] kernel_init_freeable+0x300/0x4b0
[ 30.408958][ T1] ? rest_init+0x260/0x260
[ 30.408958][ T1] kernel_init+0x2f/0x7e0
[ 30.408958][ T1] ? rest_init+0x260/0x260
[ 30.408958][ T1] ret_from_fork+0x66/0x80
[ 30.409978][ T1] ? rest_init+0x260/0x260
[ 30.409978][ T1] ret_from_fork_asm+0x11/0x20
[ 30.409978][ T1] </TASK>
[ 30.409978][ T1] Kernel Offset: disabled

GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build1804868575=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at 373b66cd2
nothing to commit, working tree clean


tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:32: run command via tools/syz-env for best compatibility, see:
Makefile:33: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=373b66cd2ba1fd05c72d0bbe16141fb287fe2eb3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240130-131205'" "-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=373b66cd2ba1fd05c72d0bbe16141fb287fe2eb3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240130-131205'" "-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=373b66cd2ba1fd05c72d0bbe16141fb287fe2eb3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240130-131205'" "-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 -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"373b66cd2ba1fd05c72d0bbe16141fb287fe2eb3\"


Error text is too large and was truncated, full error text is at:

https://syzkaller.appspot.com/x/error.txt?x=12579b34180000


Tested on:

commit: b401b621 Linux 6.8-rc5
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=d33318d4e4a0d226

[Gao Xiang]

(+add -netdev)

On 2024/2/20 15:22, syzbot wrote:
> Hello,
>
> syzbot tried to test the proposed patch but the build/boot failed:
>
> le Layout Driver Registering...

...

It seems it got some similar boot-failure issue:
https://lore.kernel.org/r/00000000000036...@google.com
https://lore.kernel.org/r/000000000000ba...@google.com

before I tend to verify a resolved duplicated report:
https://syzkaller.appspot.com/bug?extid=6c746eea496f34b3161d

Thanks,
Gao Xiang

[Gao Xiang]

#syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

another try with the current upstream.

On 2024/2/20 15:22, syzbot wrote:

[syzbot]

Hello,

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

Reported-and-tested-by: syzbot+88ad8b...@syzkaller.appspotmail.com

Tested on:

commit: b3603fcb Merge tag 'dlm-6.9' of git://git.kernel.org/p..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14395479180000
kernel config: https://syzkaller.appspot.com/x/.config?x=c0f689e0798c5101

dashboard link: https://syzkaller.appspot.com/bug?extid=88ad8b0517a9d3bb9dc8
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.

Note: testing is done by a robot and is best-effort only.

[Gao Xiang]

#syz dup KMSAN: uninit-value in z_erofs_lz4_decompress (2)