Oliver Neukum <oneukum@xxxxxxxx> writes: > Am Mittwoch, den 07.08.2019, 16:07 +0200 schrieb Andrey Konovalov: >> On Fri, Apr 12, 2019 at 1:46 PM syzbot >> <syzbot+74c65761783d66a9c97c@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: >> > >> > Hello, >> > >> > syzbot found the following crash on: >> > >> > HEAD commit: 9a33b369 usb-fuzzer: main usb gadget fuzzer driver >> > git tree: https://github.com/google/kasan/tree/usb-fuzzer >> > console output: https://syzkaller.appspot.com/x/log.txt?x=101a06dd200000 >> > kernel config: https://syzkaller.appspot.com/x/.config?x=23e37f59d94ddd15 >> > dashboard link: https://syzkaller.appspot.com/bug?extid=74c65761783d66a9c97c >> > compiler: gcc (GCC) 9.0.0 20181231 (experimental) >> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1170c22d200000 >> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1496adbb200000 >> > >> > IMPORTANT: if you fix the bug, please add the following tag to the commit: >> > Reported-by: syzbot+74c65761783d66a9c97c@xxxxxxxxxxxxxxxxxxxxxxxxx >> > >> > usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 >> > usb 1-1: config 0 descriptor?? >> > usb 1-1: reset low-speed USB device number 2 using dummy_hcd >> > usb 1-1: read over firmware interface failed: -71 >> > usb 1-1: reset low-speed USB device number 2 using dummy_hcd >> > WARNING: CPU: 1 PID: 21 at drivers/net/wireless/zydas/zd1211rw/zd_mac.c:238 >> > zd_mac_clear+0xb0/0xe0 drivers/net/wireless/zydas/zd1211rw/zd_mac.c:238 >> > Kernel panic - not syncing: panic_on_warn set ... >> > CPU: 1 PID: 21 Comm: kworker/1:1 Not tainted 5.1.0-rc4-319354-g9a33b36 #3 >> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS >> > Google 01/01/2011 >> > Workqueue: usb_hub_wq hub_event >> > Call Trace: >> > __dump_stack lib/dump_stack.c:77 [inline] >> > dump_stack+0xe8/0x16e lib/dump_stack.c:113 >> > panic+0x29d/0x5f2 kernel/panic.c:214 >> > __warn.cold+0x20/0x48 kernel/panic.c:571 >> > report_bug+0x262/0x2a0 lib/bug.c:186 >> > fixup_bug arch/x86/kernel/traps.c:179 [inline] >> > fixup_bug arch/x86/kernel/traps.c:174 [inline] >> > do_error_trap+0x130/0x1f0 arch/x86/kernel/traps.c:272 >> > do_invalid_op+0x37/0x40 arch/x86/kernel/traps.c:291 >> > invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 >> > RIP: 0010:zd_mac_clear+0xb0/0xe0 >> > drivers/net/wireless/zydas/zd1211rw/zd_mac.c:238 >> > Code: e8 85 d0 60 f8 48 8d bb f8 2b 00 00 be ff ff ff ff e8 54 5a 46 f8 31 >> > ff 89 c3 89 c6 e8 d9 d1 60 f8 85 db 75 d4 e8 60 d0 60 f8 <0f> 0b 5b 5d e9 >> > 57 d0 60 f8 48 c7 c7 58 05 cb 93 e8 fb e0 97 f8 eb >> > RSP: 0018:ffff8880a85c7310 EFLAGS: 00010293 >> > RAX: ffff8880a84de200 RBX: 0000000000000000 RCX: ffffffff8910f507 >> > RDX: 0000000000000000 RSI: ffffffff8910f510 RDI: 0000000000000005 >> > RBP: 0000000000000001 R08: ffff8880a84de200 R09: ffffed1012f83a0b >> > R10: ffffed1012f83a0a R11: ffff888097c1d057 R12: 00000000ffffffb9 >> > R13: ffff888097c18b20 R14: ffff888099456630 R15: ffffffff8f979398 >> > probe+0x259/0x590 drivers/net/wireless/zydas/zd1211rw/zd_usb.c:1421 >> > usb_probe_interface+0x31d/0x820 drivers/usb/core/driver.c:361 >> > really_probe+0x2da/0xb10 drivers/base/dd.c:509 >> > driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 >> > __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 >> > bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 >> > __device_attach+0x223/0x3a0 drivers/base/dd.c:844 >> > bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 >> > device_add+0xad2/0x16e0 drivers/base/core.c:2106 >> > usb_set_configuration+0xdf7/0x1740 drivers/usb/core/message.c:2021 >> > generic_probe+0xa2/0xda drivers/usb/core/generic.c:210 >> > usb_probe_device+0xc0/0x150 drivers/usb/core/driver.c:266 >> > really_probe+0x2da/0xb10 drivers/base/dd.c:509 >> > driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 >> > __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 >> > bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 >> > __device_attach+0x223/0x3a0 drivers/base/dd.c:844 >> > bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 >> > device_add+0xad2/0x16e0 drivers/base/core.c:2106 >> > usb_new_device.cold+0x537/0xccf drivers/usb/core/hub.c:2534 >> > hub_port_connect drivers/usb/core/hub.c:5089 [inline] >> > hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] >> > port_event drivers/usb/core/hub.c:5350 [inline] >> > hub_event+0x138e/0x3b00 drivers/usb/core/hub.c:5432 >> > process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 >> > worker_thread+0x9b/0xe20 kernel/workqueue.c:2415 >> > kthread+0x313/0x420 kernel/kthread.c:253 >> > ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 >> > Kernel Offset: disabled >> > Rebooting in 86400 seconds.. >> >> This USB bug is the second most frequently triggered one with over 10k >> kernel crashes. > > As far as I can tell this is a false positive. Didn't I submit this > upstream? > > #syz test: https://github.com/google/kasan.git 9a33b369 > > From ae999d5a437850b65497df7dcca3ffc10f75e697 Mon Sep 17 00:00:00 2001 > From: Oliver Neukum <oneukum@xxxxxxxx> > Date: Tue, 30 Jul 2019 15:59:03 +0200 > Subject: [PATCH] zdnet: remove false assertion from zd_mac_clear() > > The function is called before the lock which is asserted was ever used. > Just remove it. > > Reported-by: syzbot+74c65761783d66a9c97c@xxxxxxxxxxxxxxxxxxxxxxxxx > Signed-off-by: Oliver Neukum <oneukum@xxxxxxxx> Neither google nor patchwork[1] can find the patch. If you think the patch should be applied, please resubmit it to linux-wireless so patchwork sees it. Also the title prefix should be "zd1211rw:", not "zdnet:". [1] https://patchwork.kernel.org/project/linux-wireless/list/ -- https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
