syzbot


BUG: unable to handle kernel NULL pointer dereference in map_vdso

Status: closed as dup on 2020/09/25 12:16
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+9d25c706da4558b9f11a@syzkaller.appspotmail.com
First crash: 1325d, last: 1325d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
general protection fault in perf_misc_flags perf 7 1316d 1324d
Discussions (1)
Title Replies (including bot) Last reply
BUG: unable to handle kernel NULL pointer dereference in map_vdso 2 (3) 2020/09/25 12:16

Sample crash report:
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5029 Comm: systemd-rfkill Not tainted 5.9.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:map_vdso+0x1ea/0x270 arch/x86/entry/vdso/vma.c:308
Code: 24 31 c9 e8 88 7c a7 00 eb 7a 4c 8b 74 24 28 43 80 3c 3e 00 48 8b 5c 24 08 74 08 4c 89 ef e8 4d 00 00 00 00 20 05 00 00 49 03 <6d> 00 48 89 e8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 ef e8 ae 64
RSP: 0018:ffffc90016bafb98 EFLAGS: 00010282
RAX: 00000000ab3c6738 RBX: ffff888056ebc538 RCX: ffff888093622440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888056ebc480 R08: ffffffff81912471 R09: fffffbfff131e57c
R10: fffffbfff131e57c R11: 0000000000000000 R12: 00007fffda9dc000
R13: ffff888093622868 R14: 1ffff110126c450d R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000008fac6000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 load_elf_binary+0x2e90/0x48a0 fs/binfmt_elf.c:1221
 search_binary_handler fs/exec.c:1819 [inline]
 exec_binprm fs/exec.c:1860 [inline]
 bprm_execve+0x919/0x1500 fs/exec.c:1931
 do_execveat_common+0x487/0x5f0 fs/exec.c:2026
 do_execve fs/exec.c:2094 [inline]
 __do_sys_execve fs/exec.c:2170 [inline]
 __se_sys_execve fs/exec.c:2165 [inline]
 __x64_sys_execve+0x8e/0xa0 fs/exec.c:2165
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f8127340647
Code: Bad RIP value.
RSP: 002b:00007ffc7b57dbf8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 000055a0c9286d40 RCX: 00007f8127340647
RDX: 000055a0c9307440 RSI: 000055a0c91cd210 RDI: 000055a0c924e9a0
RBP: 00007ffc7b57dd60 R08: 000000000000fe00 R09: 0000000000000030
R10: 000055a0c9239740 R11: 0000000000000246 R12: 000055a0c91e1228
R13: 0000000000000000 R14: 000055a0c91cd210 R15: 00007ffc7b57de40
Modules linked in:
CR2: 0000000000000000

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/09/18 23:48 upstream 92ab97adeefc 53ce8104 .config console log report info ci-upstream-kasan-gce-smack-root
* Struck through repros no longer work on HEAD.