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KMSAN: uninit-value in __i2c_smbus_xfer

Status: upstream: reported C repro on 2025/05/05 07:16
Subsystems: i2c
[Documentation on labels]
Reported-by: syzbot+0a36c1fec090c67a9885@syzkaller.appspotmail.com
First crash: 223d, last: 1d14h
▶ ▼ Discussions (5)
Title Replies (including bot) Last reply
[syzbot] Monthly i2c report (Nov 2025) 0 (1) 2025/11/30 10:08
[syzbot] Monthly i2c report (Oct 2025) 0 (1) 2025/10/28 13:08
[PATCH] i2c: core: Fix uninit-value in i2c_smbus_xfer_emulated 1 (1) 2025/06/09 05:35
[syzbot] [i2c?] KMSAN: uninit-value in __i2c_smbus_xfer 0 (6) 2025/06/04 11:21
[PATCH] i2c: core: Fix uninit-value in i2c_smbus_xfer_emulated 1 (1) 2025/05/29 18:15
▶ ▼ Last patch testing requests (8)
Created Duration User Patch Repo Result
2025/10/29 01:09 28m retest repro upstream report log
2025/08/02 23:35 27m retest repro upstream report log
2025/06/04 11:21 19m abhinav.ogl@gmail.com patch upstream error
2025/05/29 11:17 29m abhinav.ogl@gmail.com patch upstream OK log
2025/05/29 08:38 33m abhinav.ogl@gmail.com patch upstream report log
2025/05/28 15:42 1h01m abhinav.ogl@gmail.com patch upstream report log
2025/05/28 10:42 1h44m abhinav.ogl@gmail.com patch upstream error
2025/05/24 21:27 26m retest repro upstream report log

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in i2c_smbus_xfer_emulated drivers/i2c/i2c-core-smbus.c:481 [inline]
BUG: KMSAN: uninit-value in __i2c_smbus_xfer+0x23e7/0x2f60 drivers/i2c/i2c-core-smbus.c:607
 i2c_smbus_xfer_emulated drivers/i2c/i2c-core-smbus.c:481 [inline]
 __i2c_smbus_xfer+0x23e7/0x2f60 drivers/i2c/i2c-core-smbus.c:607
 i2c_smbus_xfer+0x31d/0x4d0 drivers/i2c/i2c-core-smbus.c:545
 i2cdev_ioctl_smbus+0x4a1/0x660 drivers/i2c/i2c-dev.c:389
 i2cdev_ioctl+0xa14/0xf40 drivers/i2c/i2c-dev.c:478
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0x239/0x400 fs/ioctl.c:892
 __x64_sys_ioctl+0x97/0xe0 fs/ioctl.c:892
 x64_sys_call+0x1ebe/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x1b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable page created at:
 get_futex_key+0x6f/0x11d0 kernel/futex/core.c:227
 futex_wake+0xfe/0x890 kernel/futex/waitwake.c:166

CPU: 1 UID: 0 PID: 5795 Comm: syz-executor470 Not tainted 6.15.0-rc3-syzkaller-00094-g02ddfb981de8 #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
=====================================================

Crashes (99):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/01 10:18 upstream 02ddfb981de8 ce7952f4 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/12/09 05:43 upstream a110f942672c d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/12/06 18:56 upstream 416f99c3b16f d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/11/30 23:35 upstream e69c7c175115 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/11/27 22:14 upstream 765e56e41a5a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/11/27 22:14 upstream 765e56e41a5a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/11/20 12:00 upstream 23cb64fb7625 26ee5237 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/11/20 07:57 upstream 23cb64fb7625 26ee5237 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/11/16 09:32 upstream f824272b6e3f f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/11/13 09:18 upstream e927c520e1ba 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/10/14 23:36 upstream 9b332cece987 b6605ba8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/10/13 21:37 upstream 3a8660878839 b6605ba8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/10/11 15:40 upstream 0739473694c4 ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/10/06 19:34 upstream 9b0d551bcc05 91305dbe .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/10/05 08:00 upstream 9b0d551bcc05 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/09/24 19:35 upstream cec1e6e5d1ab 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/09/19 18:23 upstream 097a6c336d00 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/09/19 04:13 upstream cbf658dd0941 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/09/19 04:12 upstream cbf658dd0941 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/09/16 06:59 upstream 46a51f4f5eda e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/08/28 04:34 upstream 39f90c196721 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/08/27 20:57 upstream 39f90c196721 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/08/27 20:57 upstream 39f90c196721 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/08/26 22:08 upstream fab1beda7597 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/08/19 05:10 upstream be48bcf004f9 523f460e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/08/19 05:10 upstream be48bcf004f9 523f460e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/08/03 04:03 upstream 89748acdf226 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/08/03 04:02 upstream 89748acdf226 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/07/10 01:39 upstream 8c2e52ebbe88 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/07/10 01:38 upstream 8c2e52ebbe88 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/06/24 12:50 upstream 78f4e737a53e e2f27c35 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/06/24 12:49 upstream 78f4e737a53e e2f27c35 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/12/09 08:30 upstream a110f942672c d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/12/07 14:34 upstream 50471f8b7371 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/12/07 08:03 upstream 50471f8b7371 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/12/01 03:17 upstream e69c7c175115 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/11/28 01:32 upstream 765e56e41a5a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/11/19 03:59 upstream 5bebe8de1926 ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/11/17 21:25 upstream 6a23ae0a96a6 ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/11/16 03:28 upstream f824272b6e3f f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/10/14 22:01 upstream 9b332cece987 b6605ba8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/10/14 01:05 upstream 3a8660878839 b6605ba8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/10/12 15:42 upstream 67029a49db6c ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/09/19 19:49 upstream 097a6c336d00 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/09/19 06:13 upstream cbf658dd0941 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/08/27 22:36 upstream 39f90c196721 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/08/27 22:36 upstream 39f90c196721 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/08/27 05:50 upstream fab1beda7597 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/08/27 01:05 upstream fab1beda7597 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/08/27 00:59 upstream fab1beda7597 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/07/10 02:05 upstream 733923397fd9 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
2025/07/10 02:05 upstream 733923397fd9 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __i2c_smbus_xfer
* Struck through repros no longer work on HEAD.