syzbot


BUG: unable to handle kernel paging request in vga16fb_imageblit

Status: auto-closed as invalid on 2020/07/31 03:49
Reported-by: syzbot+7c566d88d31074e66425@syzkaller.appspotmail.com
First crash: 1746d, last: 1650d
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: unable to handle kernel paging request in vga16fb_imageblit (3) fbdev 1 998d 994d 0/28 auto-closed as invalid on 2022/04/13 17:39
upstream BUG: unable to handle kernel paging request in vga16fb_imageblit fbdev 1 1748d 1747d 0/28 auto-closed as invalid on 2020/04/23 17:11
upstream BUG: unable to handle kernel paging request in vga16fb_imageblit (2) fbdev C done 27 1245d 1614d 20/28 fixed on 2021/11/10 00:50
linux-4.19 BUG: unable to handle kernel paging request in vga16fb_imageblit (2) 26 764d 1436d 0/1 auto-obsoleted due to no activity on 2023/01/02 18:50
linux-4.14 BUG: unable to handle kernel paging request in vga16fb_imageblit 8 1244d 1636d 0/1 auto-closed as invalid on 2021/09/09 11:30

Sample crash report:
audit: type=1400 audit(1585799326.268:41437): avc:  denied  { create } for  pid=11876 comm="syz-executor.0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=0
audit: type=1400 audit(1585799326.418:41438): avc:  denied  { map } for  pid=11883 comm="blkid" path="/sbin/blkid" dev="sda1" ino=16128 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=0
BUG: unable to handle kernel paging request at ffff8880fffdb245
PGD c401067 P4D c401067 PUD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 11877 Comm: syz-executor.0 Not tainted 4.19.113-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1168 [inline]
RIP: 0010:vga16fb_imageblit+0xa5b/0x2210 drivers/video/fbdev/vga16fb.c:1260
Code: 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 0e 32 23 fe 41 8b 47 14 48 8b 74 24 08 <88> 06 0f ae e8 8a 06 b8 05 00 00 00 ba ce 03 00 00 ee 48 c7 c2 10
RSP: 0018:ffff88809520f560 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90012c2a000
RDX: 0000000000000000 RSI: ffff8880fffdb245 RDI: ffff888081f80914
RBP: ffff888081f80904 R08: ffff888042d721c0 R09: ffffed10103f012e
R10: ffffed10103f012d R11: ffff888081f8096f R12: 0000000000000000
R13: ffff888219741f40 R14: 0000000000000001 R15: ffff888081f80900
FS:  00007f299dbd9700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880fffdb245 CR3: 0000000046e79000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 soft_cursor+0x511/0xa20 drivers/video/fbdev/core/softcursor.c:74
 bit_cursor+0x1230/0x1900 drivers/video/fbdev/core/bitblit.c:386
 fbcon_cursor+0x572/0x760 drivers/video/fbdev/core/fbcon.c:1369
 hide_cursor+0x99/0x2f0 drivers/tty/vt/vt.c:895
 redraw_screen+0x2ed/0x870 drivers/tty/vt/vt.c:999
 vc_do_resize+0x109e/0x13a0 drivers/tty/vt/vt.c:1298
 vt_ioctl+0x133c/0x2310 drivers/tty/vt/vt_ioctl.c:840
 tty_ioctl+0x7a1/0x1420 drivers/tty/tty_io.c:2669
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xcda/0x12e0 fs/ioctl.c:688
 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f299dbd8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f299dbd96d4 RCX: 000000000045c849
RDX: 0000000020000000 RSI: 0000000000005609 RDI: 0000000000000003
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000669 R14: 00000000004c93d6 R15: 000000000076bf0c
Modules linked in:
CR2: ffff8880fffdb245
BUG: unable to handle kernel paging request at ffff8880fffdb245
PGD c401067 P4D c401067 PUD 0 
Oops: 0002 [#2] PREEMPT SMP KASAN
CPU: 0 PID: 11877 Comm: syz-executor.0 Not tainted 4.19.113-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1168 [inline]
RIP: 0010:vga16fb_imageblit+0xa5b/0x2210 drivers/video/fbdev/vga16fb.c:1260
Code: 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 0e 32 23 fe 41 8b 47 14 48 8b 74 24 08 <88> 06 0f ae e8 8a 06 b8 05 00 00 00 ba ce 03 00 00 ee 48 c7 c2 10
RSP: 0018:ffff88809520ed98 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffffc90012c2a000
RDX: 0000000000000000 RSI: ffff8880fffdb245 RDI: ffff888081f80914
RBP: ffff888081f80904 R08: ffff888042d721c0 R09: 0000000000000000
R10: ffffffff83750130 R11: ffffffff898d3357 R12: 0000000000000000
R13: ffff888219741f60 R14: 0000000000000001 R15: ffff888081f80900
FS:  00007f299dbd9700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880fffdb245 CR3: 0000000046e79000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 soft_cursor+0x511/0xa20 drivers/video/fbdev/core/softcursor.c:74
 bit_cursor+0x1230/0x1900 drivers/video/fbdev/core/bitblit.c:386
 fbcon_cursor+0x572/0x760 drivers/video/fbdev/core/fbcon.c:1369
 fbcon_blank+0x926/0xf00 drivers/video/fbdev/core/fbcon.c:2383
 do_unblank_screen+0x241/0x620 drivers/tty/vt/vt.c:4240
 bust_spinlocks+0x5b/0xe0
 oops_end+0x2b/0xf0 arch/x86/kernel/dumpstack.c:336
 no_context+0x3d1/0x8e0 arch/x86/mm/fault.c:830
 __bad_area_nosemaphore+0x303/0x400 arch/x86/mm/fault.c:918
 __do_page_fault+0x209/0xdd0 arch/x86/mm/fault.c:1344
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1204
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1168 [inline]
RIP: 0010:vga16fb_imageblit+0xa5b/0x2210 drivers/video/fbdev/vga16fb.c:1260
Code: 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 0e 32 23 fe 41 8b 47 14 48 8b 74 24 08 <88> 06 0f ae e8 8a 06 b8 05 00 00 00 ba ce 03 00 00 ee 48 c7 c2 10
RSP: 0018:ffff88809520f560 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90012c2a000
RDX: 0000000000000000 RSI: ffff8880fffdb245 RDI: ffff888081f80914
RBP: ffff888081f80904 R08: ffff888042d721c0 R09: ffffed10103f012e
R10: ffffed10103f012d R11: ffff888081f8096f R12: 0000000000000000
R13: ffff888219741f40 R14: 0000000000000001 R15: ffff888081f80900
 soft_cursor+0x511/0xa20 drivers/video/fbdev/core/softcursor.c:74
 bit_cursor+0x1230/0x1900 drivers/video/fbdev/core/bitblit.c:386
 fbcon_cursor+0x572/0x760 drivers/video/fbdev/core/fbcon.c:1369
 hide_cursor+0x99/0x2f0 drivers/tty/vt/vt.c:895
 redraw_screen+0x2ed/0x870 drivers/tty/vt/vt.c:999
 vc_do_resize+0x109e/0x13a0 drivers/tty/vt/vt.c:1298
 vt_ioctl+0x133c/0x2310 drivers/tty/vt/vt_ioctl.c:840
 tty_ioctl+0x7a1/0x1420 drivers/tty/tty_io.c:2669
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xcda/0x12e0 fs/ioctl.c:688
 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f299dbd8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f299dbd96d4 RCX: 000000000045c849
RDX: 0000000020000000 RSI: 0000000000005609 RDI: 0000000000000003
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000669 R14: 00000000004c93d6 R15: 000000000076bf0c
Modules linked in:
CR2: ffff8880fffdb245
---[ end trace 6cc23d17806879e9 ]---
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1168 [inline]
RIP: 0010:vga16fb_imageblit+0xa5b/0x2210 drivers/video/fbdev/vga16fb.c:1260
Code: 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 0e 32 23 fe 41 8b 47 14 48 8b 74 24 08 <88> 06 0f ae e8 8a 06 b8 05 00 00 00 ba ce 03 00 00 ee 48 c7 c2 10
RSP: 0018:ffff88809520f560 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90012c2a000
RDX: 0000000000000000 RSI: ffff8880fffdb245 RDI: ffff888081f80914
RBP: ffff888081f80904 R08: ffff888042d721c0 R09: ffffed10103f012e
R10: ffffed10103f012d R11: ffff888081f8096f R12: 0000000000000000
R13: ffff888219741f40 R14: 0000000000000001 R15: ffff888081f80900
FS:  00007f299dbd9700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880fffdb245 CR3: 0000000046e79000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/04/02 03:48 linux-4.19.y 54b4fa6d3955 a34e2c33 .config console log report ci2-linux-4-19
2020/03/16 01:17 linux-4.19.y 569209711609 749688d2 .config console log report ci2-linux-4-19
2019/12/30 00:23 linux-4.19.y 672481c2deff af6b8ef8 .config console log report ci2-linux-4-19
2019/12/27 12:28 linux-4.19.y 672481c2deff be5c2c81 .config console log report ci2-linux-4-19
* Struck through repros no longer work on HEAD.