syzbot has found a reproducer for the following issue on: HEAD commit: b3a3cbde Add linux-next specific files for 20210115 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=164096d7500000 kernel config: https://syzkaller.appspot.com/x/.config?x=6ea08dae6aab586f dashboard link: https://syzkaller.appspot.com/bug?extid=b67aaae8d3a927f68d20 compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15cd8fe0d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17af5258d00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b67aaae8d3a927f68d20@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 12267067 P4D 12267067 PUD 11841067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8463 Comm: syz-executor088 Not tainted 5.11.0-rc3-next-20210115-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0x0 Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. RSP: 0018:ffffc9000132f850 EFLAGS: 00010292 RAX: 0000000000000007 RBX: 0000000000000000 RCX: 0000000000000007 RDX: 0000000000000002 RSI: ffff88814394b000 RDI: ffff888010071000 RBP: ffff888010071000 R08: 0000000000000000 R09: ffffffff83ed87ea R10: 0000000000000003 R11: 0000000000000018 R12: ffff88814394b000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000720 FS: 0000000000db8880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000020cd8000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fbcon_cursor+0x50e/0x620 drivers/video/fbdev/core/fbcon.c:1336 hide_cursor+0x85/0x280 drivers/tty/vt/vt.c:907 redraw_screen+0x5b4/0x740 drivers/tty/vt/vt.c:1012 vc_do_resize+0xed8/0x1150 drivers/tty/vt/vt.c:1325 fbcon_set_disp+0x7a8/0xe10 drivers/video/fbdev/core/fbcon.c:1402 con2fb_init_display drivers/video/fbdev/core/fbcon.c:808 [inline] set_con2fb_map+0x7a6/0xf80 drivers/video/fbdev/core/fbcon.c:879 fbcon_set_con2fb_map_ioctl+0x165/0x220 drivers/video/fbdev/core/fbcon.c:3010 do_fb_ioctl+0x5b6/0x690 drivers/video/fbdev/core/fbmem.c:1156 fb_ioctl+0xe7/0x150 drivers/video/fbdev/core/fbmem.c:1185 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4402b9 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 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffffae24f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402b9 RDX: 0000000020000080 RSI: 0000000000004610 RDI: 0000000000000004 RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401ac0 R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: 0000000000000000 ---[ end trace 5adb9f198fe5efa6 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. RSP: 0018:ffffc9000132f850 EFLAGS: 00010292 RAX: 0000000000000007 RBX: 0000000000000000 RCX: 0000000000000007 RDX: 0000000000000002 RSI: ffff88814394b000 RDI: ffff888010071000 RBP: ffff888010071000 R08: 0000000000000000 R09: ffffffff83ed87ea R10: 0000000000000003 R11: 0000000000000018 R12: ffff88814394b000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000720 FS: 0000000000db8880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000020cd8000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
