linux-kernel - [syzbot] [arm?] BUG: unable to handle kernel paging request in invoke

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Message-ID: <0000000000007096ce05ffa9b7aa@google.com>
Date:   Tue, 04 Jul 2023 07:01:15 -0700
From:   syzbot <syzbot+a5638594f1bc152f1200@...kaller.appspotmail.com>
To:     catalin.marinas@....com, keescook@...omium.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, will@...nel.org
Subject: [syzbot] [arm?] BUG: unable to handle kernel paging request in invoke_syscall

Hello,

syzbot found the following issue on:

HEAD commit:    3a8a670eeeaa Merge tag 'net-next-6.5' of git://git.kernel...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1652699f280000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ce7f4ca96cdf82c7
dashboard link: https://syzkaller.appspot.com/bug?extid=a5638594f1bc152f1200
compiler:       aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1645c714a80000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/384ffdcca292/non_bootable_disk-3a8a670e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a940531a9b86/vmlinux-3a8a670e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4f3cbae5be61/Image-3a8a670e.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a5638594f1bc152f1200@...kaller.appspotmail.com

Unable to handle kernel paging request at virtual address bfff800082cebd10
Mem abort info:
  ESR = 0x0000000086000004
  EC = 0x21: IABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x04: level 0 translation fault
swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000042480000
[bfff800082cebd10] pgd=10000000bffff803, p4d=10000000bffff803, pud=10000000bfffe803, pmd=1000000043834003, pte=0068000048f30f07
Internal error: Oops: 0000000086000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 3234 Comm: udevd Not tainted 6.4.0-syzkaller-04247-g3a8a670eeeaa #0
Hardware name: linux,dummy-virt (DT)
pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : 0xbfff800082cebd10
lr : 0xffff800082cebd10
sp : ffff800082cf3df0
x29: ffff800082cf3df0 x28: f9ff00000705af40 x27: 0000000000000000
x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000
x23: 0000000060000000 x22: 0000ffffa736068c x21: 00000000ffffffff
x20: f9ff00000705af40 x19: ffff800082cf3eb0 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: ffff800082cf3c88
x14: 0000000000000000 x13: 0000000000001000 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000000701 x9 : 0000000600000000
x8 : 000000001dcd6500 x7 : 0000000000000027 x6 : 0000ffffef8c1df8
x5 : 0000ffffef8c1df8 x4 : 0000000000000008 x3 : 0000000000000000
x2 : 0000000000000000 x1 : f9ff00000705af40 x0 : 0000000000000000
Call trace:
 0xbfff800082cebd10
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:52
 el0_svc_common.constprop.0+0x44/0xe4 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x38/0xa4 arch/arm64/kernel/syscall.c:191
 el0_svc+0x2c/0xb0 arch/arm64/kernel/entry-common.c:647
 el0t_64_sync_handler+0xc0/0xc4 arch/arm64/kernel/entry-common.c:665
 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:591
Code: 00000002 00000000 eed50f00 041d12ac (82cebd30) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	00000002 	udf	#2
   4:	00000000 	udf	#0
   8:	eed50f00 	.inst	0xeed50f00 ; undefined
   c:	041d12ac 	.inst	0x041d12ac ; undefined
* 10:	82cebd30 	.inst	0x82cebd30 ; undefined <-- trapping instruction


---
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If the bug is already fixed, let syzbot know by replying with:
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