Messages in this thread | | | Date | Sat, 18 Dec 2021 03:17:32 -0800 | Subject | [syzbot] KMSAN: uninit-value in snd_rawmidi_ioctl | From | syzbot <> |
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Hello,
syzbot found the following issue on:
HEAD commit: 8b936c96768e kmsan: core: remove the accidentally committe.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=11791d89b00000 kernel config: https://syzkaller.appspot.com/x/.config?x=e00a8959fdd3f3e8 dashboard link: https://syzkaller.appspot.com/bug?extid=88412ee8811832b00dbe compiler: clang version 14.0.0 (git@github.com:llvm/llvm-project.git 0996585c8e3b3d409494eb5f1cad714b9e1f7fb5), GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13a7abf9b00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=172410b9b00000
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+88412ee8811832b00dbe@syzkaller.appspotmail.com
===================================================== BUG: KMSAN: uninit-value in snd_rawmidi_ioctl+0xf1e/0x1330 sound/core/rawmidi.c:887 snd_rawmidi_ioctl+0xf1e/0x1330 sound/core/rawmidi.c:887 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0x2df/0x4a0 fs/ioctl.c:860 __x64_sys_ioctl+0xd8/0x110 fs/ioctl.c:860 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
Uninit was created at: slab_post_alloc_hook mm/slab.h:524 [inline] slab_alloc_node mm/slub.c:3251 [inline] slab_alloc mm/slub.c:3259 [inline] kmem_cache_alloc_trace+0xaca/0x1140 mm/slub.c:3276 kmalloc include/linux/slab.h:590 [inline] snd_rawmidi_open+0x70d/0x1390 sound/core/rawmidi.c:445 snd_open+0x702/0x890 sound/core/sound.c:169 chrdev_open+0xbc9/0xd80 fs/char_dev.c:414 do_dentry_open+0x1128/0x1bf0 fs/open.c:822 vfs_open+0xaf/0xe0 fs/open.c:957 do_open fs/namei.c:3426 [inline] path_openat+0x52f1/0x5dd0 fs/namei.c:3559 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_openat fs/open.c:1244 [inline] __se_sys_openat fs/open.c:1239 [inline] __x64_sys_openat+0x35f/0x3c0 fs/open.c:1239 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: 1 PID: 6368 Comm: syz-executor467 Not tainted 5.16.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================
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