linux-kernel - [syzbot] upstream boot error: BUG: unable to handle kernel NULL pointer dereference in __irq_resolve

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Date:   Wed, 03 May 2023 12:15:09 -0700
From:   syzbot <syzbot+ed37e5e7af93ae8a08ba@...kaller.appspotmail.com>
To:     linux-kernel@...r.kernel.org, maz@...nel.org,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de
Subject: [syzbot] upstream boot error: BUG: unable to handle kernel NULL
 pointer dereference in __irq_resolve_mapping

Hello,

syzbot found the following issue on:

HEAD commit:    348551ddaf31 Merge tag 'pinctrl-v6.4-1' of git://git.kerne..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14398ef8280000
kernel config:  https://syzkaller.appspot.com/x/.config?x=124f13edd5df0b0d
dashboard link: https://syzkaller.appspot.com/bug?extid=ed37e5e7af93ae8a08ba
compiler:       arm-linux-gnueabi-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ed37e5e7af93ae8a08ba@...kaller.appspotmail.com

8<--- cut here ---
Unable to handle kernel NULL pointer dereference at virtual address 00000213 when read
[00000213] *pgd=80000080004003, *pmd=00000000
Internal error: Oops: 207 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.3.0-syzkaller #0
Hardware name: ARM-Versatile Express
PC is at irq_data_to_desc include/linux/irqdesc.h:124 [inline]
PC is at __irq_resolve_mapping+0x40/0x90 kernel/irq/irqdomain.c:968
LR is at rcu_read_lock include/linux/rcupdate.h:771 [inline]
LR is at __irq_resolve_mapping+0x20/0x90 kernel/irq/irqdomain.c:960
pc : [<802c0dec>]    lr : [<802c0dcc>]    psr: 20000193
sp : 82601e58  ip : 82601e58  fp : 82601e74
r10: 00000000  r9 : 8261ae40  r8 : 00000000
r7 : df80a00c  r6 : 00000000  r5 : 0000001b  r4 : 83094000
r3 : 83094060  r2 : 8261ae40  r1 : 0000001b  r0 : 00000207
Flags: nzCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 30c5387d  Table: 848c1880  DAC: fffffffd
Register r0 information: non-paged memory
Register r1 information: non-paged memory
Register r2 information: non-slab/vmalloc memory
Register r3 information:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 0 at mm/slub.c:4649 __kmem_obj_info+0x1c4/0x21c mm/slub.c:4649
Modules linked in:


---
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