Re: WARNING in syscall_exit_to_user_mode

2020-11-11 Thread Dmitry Vyukov
On Sun, Nov 8, 2020 at 6:22 PM syzbot wrote: > > syzbot suspects this issue was fixed by commit: > > commit a49145acfb975d921464b84fe00279f99827d816 > Author: George Kennedy > Date: Tue Jul 7 19:26:03 2020 + > > fbmem: add margin check to fb_check_caps() > > bisection log: https://syzk

Re: WARNING in syscall_exit_to_user_mode

2020-11-08 Thread syzbot
syzbot suspects this issue was fixed by commit: commit a49145acfb975d921464b84fe00279f99827d816 Author: George Kennedy Date: Tue Jul 7 19:26:03 2020 + fbmem: add margin check to fb_check_caps() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17a21f3250 start commit:

Re: WARNING in syscall_exit_to_user_mode

2020-09-14 Thread Thomas Gleixner
On Mon, Sep 14 2020 at 13:06, Kees Cook wrote: > On Sun, Sep 13, 2020 at 09:54:34PM +0200, Thomas Gleixner wrote: >> On Sat, Sep 12 2020 at 10:52, Kees Cook wrote: >> >> [ cut here ] >> >> syscall 56 left IRQs disabled >> > >> > This WARN appears reachable. :) >> >> The abo

Re: WARNING in syscall_exit_to_user_mode

2020-09-14 Thread Kees Cook
On Sun, Sep 13, 2020 at 09:54:34PM +0200, Thomas Gleixner wrote: > On Sat, Sep 12 2020 at 10:52, Kees Cook wrote: > >> [ cut here ] > >> syscall 56 left IRQs disabled > > > > This WARN appears reachable. :) > > The above is hardly a problem of the new entry code. It's just

Re: WARNING in syscall_exit_to_user_mode

2020-09-13 Thread Thomas Gleixner
On Sat, Sep 12 2020 at 10:52, Kees Cook wrote: >> [ cut here ] >> syscall 56 left IRQs disabled > > This WARN appears reachable. :) The above is hardly a problem of the new entry code. It's just detecting the wreckage... > I also see on the dashboard these other problems w

Re: WARNING in syscall_exit_to_user_mode

2020-09-13 Thread Thomas Gleixner
On Fri, Sep 11 2020 at 03:39, syzbot wrote: > > [ cut here ] > syscall 56 left IRQs disabled Ouch. syscall 56 == sys_clone > WARNING: CPU: 1 PID: 31467 at kernel/entry/common.c:245 > syscall_exit_to_user_mode_prepare kernel/entry/common.c:245 [inline] > ret_from_fork+

Re: WARNING in syscall_exit_to_user_mode

2020-09-12 Thread Kees Cook
On Fri, Sep 11, 2020 at 03:39:19AM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit:f4d51dff Linux 5.9-rc4 > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=12a4e7cd90 > kernel config: https://syzkaller.appspot.co

WARNING in syscall_exit_to_user_mode

2020-09-11 Thread syzbot
Hello, syzbot found the following issue on: HEAD commit:f4d51dff Linux 5.9-rc4 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12a4e7cd90 kernel config: https://syzkaller.appspot.com/x/.config?x=a9075b36a6ae26c9 dashboard link: https://syzkaller.appspot