Messages in this thread | | | Date | Mon, 07 Oct 2019 12:39:07 -0700 | Subject | KMSAN: uninit-value in alauda_check_media | From | syzbot <> |
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Hello,
syzbot found the following crash on:
HEAD commit: 1e76a3e5 kmsan: replace __GFP_NO_KMSAN_SHADOW with kmsan_i.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=1204cc63600000 kernel config: https://syzkaller.appspot.com/x/.config?x=f03c659d0830ab8d dashboard link: https://syzkaller.appspot.com/bug?extid=e7d46eb426883fb97efd compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=123c860d600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=110631b7600000
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+e7d46eb426883fb97efd@syzkaller.appspotmail.com
===================================================== BUG: KMSAN: uninit-value in alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1137 CPU: 0 PID: 12279 Comm: usb-storage Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250 alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:460 alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1137 usb_stor_invoke_transport+0xf5/0x27e0 drivers/usb/storage/transport.c:606 usb_stor_transparent_scsi_command+0x5d/0x70 drivers/usb/storage/protocol.c:108 usb_stor_control_thread+0xca6/0x11a0 drivers/usb/storage/usb.c:380 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355
Local variable description: ----status@alauda_check_media Variable was created at: alauda_check_media+0x8e/0x3310 drivers/usb/storage/alauda.c:454 alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1137 ===================================================== Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 12279 Comm: usb-storage Tainted: G B 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 panic+0x3c9/0xc1e kernel/panic.c:219 kmsan_report+0x2a2/0x2b0 mm/kmsan/kmsan_report.c:131 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250 alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:460 alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1137 usb_stor_invoke_transport+0xf5/0x27e0 drivers/usb/storage/transport.c:606 usb_stor_transparent_scsi_command+0x5d/0x70 drivers/usb/storage/protocol.c:108 usb_stor_control_thread+0xca6/0x11a0 drivers/usb/storage/usb.c:380 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 Kernel Offset: disabled Rebooting in 86400 seconds..
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