.On Fri, Mar 19, 2021 at 10:44 AM syzbot <syzbot+f09a12b2c77bfbbf5...@syzkaller.appspotmail.com> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: 8b12a62a Merge tag 'drm-fixes-2021-03-19' of git://anongit.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=17e815aed00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=cfeed364fc353c32 > dashboard link: https://syzkaller.appspot.com/bug?extid=f09a12b2c77bfbbf51bd > userspace arch: arm > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+f09a12b2c77bfbbf5...@syzkaller.appspotmail.com
+Mark, arm It did not get far with CONFIG_CONTEXT_TRACKING_FORCE (kernel doesn't boot). > Run /sbin/init as init process > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 1 at include/linux/seqlock.h:271 __seqprop_assert > include/linux/seqlock.h:271 [inline] > WARNING: CPU: 0 PID: 1 at include/linux/seqlock.h:271 > __seqprop_assert.constprop.0+0xf0/0x11c include/linux/seqlock.h:269 > Modules linked in: > Kernel panic - not syncing: panic_on_warn set ... > CPU: 0 PID: 1 Comm: init Not tainted 5.12.0-rc3-syzkaller #0 > Hardware name: ARM-Versatile Express > Backtrace: > [<81804310>] (dump_backtrace) from [<81804584>] (show_stack+0x18/0x1c > arch/arm/kernel/traps.c:252) > r7:00000080 r6:60000193 r5:00000000 r4:82b58444 > [<8180456c>] (show_stack) from [<8180bc58>] (__dump_stack lib/dump_stack.c:79 > [inline]) > [<8180456c>] (show_stack) from [<8180bc58>] (dump_stack+0xb8/0xe8 > lib/dump_stack.c:120) > [<8180bba0>] (dump_stack) from [<81805118>] (panic+0x130/0x378 > kernel/panic.c:231) > r7:81f487d4 r6:82a390e4 r5:00000000 r4:82c6b0d8 > [<81804fe8>] (panic) from [<802447b4>] (__warn+0xb0/0x164 kernel/panic.c:605) > r3:82a2248c r2:00000000 r1:5b71e000 r0:81f487d4 > r7:0000010f > [<80244704>] (__warn) from [<818053c8>] (warn_slowpath_fmt+0x68/0xd4 > kernel/panic.c:628) > r7:8028c4b4 r6:0000010f r5:81f40c30 r4:00000000 > [<81805364>] (warn_slowpath_fmt) from [<8028c4b4>] (__seqprop_assert > include/linux/seqlock.h:271 [inline]) > [<81805364>] (warn_slowpath_fmt) from [<8028c4b4>] > (__seqprop_assert.constprop.0+0xf0/0x11c include/linux/seqlock.h:269) > r8:00000000 r7:82a22498 r6:828ac940 r5:8181fbb0 r4:00000001 > [<8028c3c4>] (__seqprop_assert.constprop.0) from [<8028ea54>] > (vtime_user_enter+0x1c/0x90 kernel/sched/cputime.c:709) > r5:8181fbb0 r4:834f0000 > [<8028ea38>] (vtime_user_enter) from [<8181fbb0>] > (__context_tracking_enter+0x148/0x334 kernel/context_tracking.c:82) > r7:82a22498 r6:828ac940 r5:ffffe000 r4:00000001 > [<8181fa68>] (__context_tracking_enter) from [<80417170>] > (context_tracking_enter kernel/context_tracking.c:122 [inline]) > [<8181fa68>] (__context_tracking_enter) from [<80417170>] > (context_tracking_enter+0x54/0x84 kernel/context_tracking.c:106) > r7:00000000 r6:00000000 r5:60000193 r4:00000001 > [<8041711c>] (context_tracking_enter) from [<804171bc>] (user_enter > include/linux/context_tracking.h:28 [inline]) > [<8041711c>] (context_tracking_enter) from [<804171bc>] > (context_tracking_user_enter+0x1c/0x20 kernel/context_tracking.c:130) > r5:81820218 r4:00000000 > [<804171a0>] (context_tracking_user_enter) from [<802000d4>] > (no_work_pending+0x8/0x38) > Exception stack(0x834dffb0 to 0x834dfff8) > ffa0: 00000000 00000000 00000000 00000000 > ffc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 > ffe0: 00000000 7ec68ef0 00000000 76ee5a00 00000010 00000000 > Rebooting in 86400 seconds.. > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkal...@googlegroups.com. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/0000000000004f14c105bde08f75%40google.com.
