syzbot


KMSAN: uninit-value in cxusb_i2c_xfer

Status: upstream: reported C repro on 2025/04/05 02:17
Subsystems: media
[Documentation on labels]
Reported-by: syzbot+526bd95c0ec629993bf3@syzkaller.appspotmail.com
First crash: 23d, last: 16h57m
Discussions (5)
Title Replies (including bot) Last reply
[syzbot] Monthly media report (Apr 2025) 0 (1) 2025/04/23 07:50
[PATCH] media: cxusb: no longer judge rbuf when the write fails 1 (1) 2025/04/05 11:56
[syzbot] [media?] KMSAN: uninit-value in cxusb_i2c_xfer 1 (3) 2025/04/05 11:54
[PATCH v2] media: cxusb: fix uninitialized var in cxusb_gpio_tuner() 1 (1) 2025/04/05 07:31
[PATCH] dvb: usb: cxusb: fix uninitialized var in cxusb_gpio_tuner() 1 (1) 2025/04/05 03:21
Last patch testing requests (1)
Created Duration User Patch Repo Result
2025/04/05 09:02 33m eadavis@qq.com patch upstream OK log

Sample crash report:
dvb-usb: bulk message failed: -22 (3/0)
=====================================================
BUG: KMSAN: uninit-value in cxusb_gpio_tuner drivers/media/usb/dvb-usb/cxusb.c:124 [inline]
BUG: KMSAN: uninit-value in cxusb_i2c_xfer+0x153a/0x1a60 drivers/media/usb/dvb-usb/cxusb.c:196
 cxusb_gpio_tuner drivers/media/usb/dvb-usb/cxusb.c:124 [inline]
 cxusb_i2c_xfer+0x153a/0x1a60 drivers/media/usb/dvb-usb/cxusb.c:196
 __i2c_transfer+0xe25/0x3150 drivers/i2c/i2c-core-base.c:-1
 i2c_transfer+0x317/0x4a0 drivers/i2c/i2c-core-base.c:2315
 i2c_transfer_buffer_flags+0x125/0x1e0 drivers/i2c/i2c-core-base.c:2343
 i2c_master_send include/linux/i2c.h:109 [inline]
 i2cdev_write+0x210/0x280 drivers/i2c/i2c-dev.c:183
 do_loop_readv_writev fs/read_write.c:848 [inline]
 vfs_writev+0x963/0x14e0 fs/read_write.c:1057
 do_writev+0x247/0x5c0 fs/read_write.c:1101
 __do_sys_writev fs/read_write.c:1169 [inline]
 __se_sys_writev fs/read_write.c:1166 [inline]
 __x64_sys_writev+0x98/0xe0 fs/read_write.c:1166
 x64_sys_call+0x2229/0x3c80 arch/x86/include/generated/asm/syscalls_64.h:21
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable i.i809 created at:
 cxusb_gpio_tuner drivers/media/usb/dvb-usb/cxusb.c:116 [inline]
 cxusb_i2c_xfer+0x323/0x1a60 drivers/media/usb/dvb-usb/cxusb.c:196
 __i2c_transfer+0xe25/0x3150 drivers/i2c/i2c-core-base.c:-1

CPU: 0 UID: 0 PID: 5806 Comm: syz-executor225 Not tainted 6.14.0-syzkaller-10892-g4e82c87058f4 #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
=====================================================

Crashes (228):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/04/01 07:19 upstream 4e82c87058f4 36d76a97 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/01 04:23 upstream 4e82c87058f4 36d76a97 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/22 19:09 upstream a33b5a08cbbd 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/22 06:04 upstream a33b5a08cbbd 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/21 16:48 upstream 9d7a0577c9db 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/21 09:23 upstream 9d7a0577c9db 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/20 23:54 upstream 6fea5fabd332 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/20 19:43 upstream 6fea5fabd332 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/20 09:55 upstream 119009db2674 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/20 05:58 upstream 119009db2674 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/19 19:41 upstream 8560697b23dc 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/19 16:38 upstream 8560697b23dc 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/19 14:30 upstream 3088d26962e8 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/19 12:35 upstream 3088d26962e8 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/19 11:20 upstream 3088d26962e8 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/19 06:27 upstream 3088d26962e8 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/19 03:14 upstream 3088d26962e8 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/18 18:54 upstream fc96b232f8e7 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/18 17:01 upstream fc96b232f8e7 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/18 04:06 upstream b5c6891b2c5b 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/17 16:01 upstream cfb2e2c57aef 2a6ededb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/15 02:10 upstream 834a4a689699 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/15 00:44 upstream 834a4a689699 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/14 04:22 upstream 8ffd015db85f 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/13 20:22 upstream 7cdabafc0012 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/13 19:36 upstream 7cdabafc0012 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/23 13:25 upstream bc3372351d0c d971f7e2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/21 15:22 upstream 9d7a0577c9db 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/21 07:43 upstream 6fea5fabd332 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/21 03:54 upstream 6fea5fabd332 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/20 21:28 upstream 6fea5fabd332 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/20 18:41 upstream 119009db2674 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/20 15:21 upstream 119009db2674 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/20 15:18 upstream 119009db2674 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/20 14:06 upstream 119009db2674 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/20 12:57 upstream 119009db2674 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/20 03:31 upstream 8560697b23dc 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/20 00:30 upstream 8560697b23dc 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/19 23:26 upstream 8560697b23dc 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/19 23:19 upstream 8560697b23dc 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/19 21:28 upstream 8560697b23dc 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/18 20:46 upstream fc96b232f8e7 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/18 20:32 upstream fc96b232f8e7 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/15 11:34 upstream 834a4a689699 23b969b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/14 13:12 upstream 8ffd015db85f 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/14 07:36 upstream 8ffd015db85f 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/14 02:28 upstream 8ffd015db85f 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
2025/04/13 22:10 upstream 7cdabafc0012 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in cxusb_i2c_xfer
* Struck through repros no longer work on HEAD.