general protection fault in map_vdso

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 16bc1d54 Merge tag 'kbuild-fixes-v5.9-4' of git://git.kern..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=164f554b900000
kernel config: https://syzkaller.appspot.com/x/.config?x=240e2ebab67245c7
dashboard link: https://syzkaller.appspot.com/bug?extid=cacba97efd3540976bda
compiler: gcc (GCC) 10.1.0-syz 20200507
userspace arch: i386
CC: [b...@alien8.de h...@zytor.com linux-...@vger.kernel.org lu...@kernel.org mi...@redhat.com tg...@linutronix.de x...@kernel.org]

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+cacba9...@syzkaller.appspotmail.com

general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 9326 Comm: modprobe Not tainted 5.9.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:map_vdso+0x27/0x340 arch/x86/entry/vdso/vma.c:264
Code: 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 49 89 ff 41 56 41 55 41 54 55 65 48 8b 2c 25 c0 fe 01 00 48 8d bd 28 04 00 00 53 <48> 00 00 00 00 fa 48 83 ec 10 48 c1 ea 03 80 3c 02 00 0f 85 51 02
RSP: 0018:ffffc90006137c00 EFLAGS: 00010286
RAX: dffffc0000000000 RBX: ffff8880a3fd24b8 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 00007ffc73ef9000 RDI: ffff8880205de468
RBP: ffff8880205de040 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804f7c3198
R13: ffff88804f7c3150 R14: 00007fada57fcc20 R15: ffffffff88805400
FS: 0000000000000000(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fada5a20fc0 CR3: 00000000196d3000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
load_elf_binary+0x22d4/0x47c0 fs/binfmt_elf.c:1221
search_binary_handler fs/exec.c:1819 [inline]
exec_binprm fs/exec.c:1860 [inline]
bprm_execve+0x936/0x1b10 fs/exec.c:1931
kernel_execve+0x370/0x460 fs/exec.c:2080
call_usermodehelper_exec_async+0x27a/0x500 kernel/umh.c:101
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Modules linked in:
---[ end trace 50b5f8eaa855360a ]---
RIP: 0010:map_vdso+0x27/0x340 arch/x86/entry/vdso/vma.c:264
Code: 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 49 89 ff 41 56 41 55 41 54 55 65 48 8b 2c 25 c0 fe 01 00 48 8d bd 28 04 00 00 53 <48> 00 00 00 00 fa 48 83 ec 10 48 c1 ea 03 80 3c 02 00 0f 85 51 02
RSP: 0018:ffffc90006137c00 EFLAGS: 00010286
RAX: dffffc0000000000 RBX: ffff8880a3fd24b8 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 00007ffc73ef9000 RDI: ffff8880205de468
RBP: ffff8880205de040 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804f7c3198
R13: ffff88804f7c3150 R14: 00007fada57fcc20 R15: ffffffff88805400
FS: 0000000000000000(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056425317d550 CR3: 00000000196d3000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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[Dmitry Vyukov]

#syz dup: general protection fault in perf_misc_flags

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