syzbot


BUG: unable to handle kernel paging request in csi_J
Status: closed as dup on 2020/08/16 01:38
Reported-by: syzbot+3f1750a5249afd5d7d2d@syzkaller.appspotmail.com
First crash: 870d, last: 743d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: general protection fault in csi_J (log)
Repro: C syz .config

Fix bisection: failed (bisect log)
Duplicate of (1):
Title Repro Cause bisect Fix bisect Count Last Reported
general protection fault in do_con_write C done 10703 670d 905d
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 BUG: unable to handle kernel paging request in csi_J C inconclusive 3 712d 869d 0/1 upstream: reported C repro on 2020/01/09 15:19
linux-4.19 BUG: unable to handle kernel paging request in csi_J C done 3 694d 862d 1/1 fixed on 2020/08/02 06:53

Sample crash report:
BUG: unable to handle page fault for address: 000000010000000e
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 98735067 P4D 98735067 PUD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 10615 Comm: syz-executor706 Not tainted 5.5.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:memset16 arch/x86/include/asm/string_64.h:25 [inline]
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_J+0x2bf/0xb00 drivers/tty/vt/vt.c:1529
Code: ff df 43 8d 4c 2d 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e af 06 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 e7 <f3> 66 ab 48 89 df e8 46 f2 ff ff 31 ff 41 89 c6 89 c6 e8 5a d5 88
RSP: 0018:ffffc90001fb7860 EFLAGS: 00010202
RAX: 0000000000000720 RBX: ffff8880a38ca000 RCX: 0000000000000001
RDX: 1ffff11014719479 RSI: ffffffff83ec2116 RDI: 000000010000000e
RBP: ffffc90001fb78a0 R08: ffff8880988d60c0 R09: ffff8880988d6950
R10: fffffbfff14f6998 R11: ffffffff8a7b4cc7 R12: 000000010000000e
R13: 7fffffff80000001 R14: 0000000000000011 R15: 0000000000000000
FS:  0000000001933880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000010000000e CR3: 0000000097611000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_con_trol+0x50cc/0x61b0 drivers/tty/vt/vt.c:2367
 do_con_write.part.0+0xfd9/0x1ef0 drivers/tty/vt/vt.c:2797
 do_con_write drivers/tty/vt/vt.c:2565 [inline]
 con_write+0x46/0xd0 drivers/tty/vt/vt.c:3135
 process_output_block drivers/tty/n_tty.c:595 [inline]
 n_tty_write+0x40e/0x1080 drivers/tty/n_tty.c:2333
 do_tty_write drivers/tty/tty_io.c:962 [inline]
 tty_write+0x496/0x7f0 drivers/tty/tty_io.c:1046
 __vfs_write+0x8a/0x110 fs/read_write.c:494
 vfs_write+0x268/0x5d0 fs/read_write.c:558
 ksys_write+0x14f/0x290 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write fs/read_write.c:620 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:620
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4404f9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffe07deda88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9
RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0
R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
CR2: 000000010000000e
---[ end trace 3b256755b4b32bc1 ]---
RIP: 0010:memset16 arch/x86/include/asm/string_64.h:25 [inline]
RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline]
RIP: 0010:csi_J+0x2bf/0xb00 drivers/tty/vt/vt.c:1529
Code: ff df 43 8d 4c 2d 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e af 06 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 e7 <f3> 66 ab 48 89 df e8 46 f2 ff ff 31 ff 41 89 c6 89 c6 e8 5a d5 88
RSP: 0018:ffffc90001fb7860 EFLAGS: 00010202
RAX: 0000000000000720 RBX: ffff8880a38ca000 RCX: 0000000000000001
RDX: 1ffff11014719479 RSI: ffffffff83ec2116 RDI: 000000010000000e
RBP: ffffc90001fb78a0 R08: ffff8880988d60c0 R09: ffff8880988d6950
R10: fffffbfff14f6998 R11: ffffffff8a7b4cc7 R12: 000000010000000e
R13: 7fffffff80000001 R14: 0000000000000011 R15: 0000000000000000
FS:  0000000001933880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb914bb1000 CR3: 0000000097611000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (11):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2020/01/16 06:49 upstream 51d69817519f f9b69507 .config log report syz C
ci-upstream-kasan-gce-root 2020/01/16 04:23 upstream 51d69817519f f9b69507 .config log report syz C
ci-upstream-kasan-gce 2020/01/16 02:40 upstream 51d69817519f f9b69507 .config log report syz C
ci-upstream-kasan-gce-smack-root 2020/01/16 01:42 upstream 51d69817519f f9b69507 .config log report syz C
ci-upstream-kasan-gce-386 2020/01/16 06:19 upstream 51d69817519f f9b69507 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/01/18 09:18 linux-next 2747d5fdab78 3de7aabb .config log report syz C
ci-upstream-kasan-gce 2020/01/26 19:35 upstream 2821e26f3a0a dd56146d .config log report
ci-upstream-kasan-gce-root 2020/01/16 13:05 upstream f5ae2ea6347a 3de7aabb .config log report
ci-upstream-kasan-gce-root 2020/01/15 18:35 upstream 95e20af9fb9c f9b69507 .config log report
ci-upstream-kasan-gce-selinux-root 2020/01/08 13:56 upstream ae6088216ce4 ddc3e859 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/01/23 23:09 linux-next 2747d5fdab78 2e95ab33 .config log report