Message-ID: <00000000000034712e05ca9741e8@google.com>
Date:   Fri, 27 Aug 2021 21:44:26 -0700
From:   syzbot <syzbot+7d41312fe3f123a6f605@...kaller.appspotmail.com>
To:     gregkh@...uxfoundation.org, len.brown@...el.com,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        pavel@....cz, rjw@...ysocki.net, syzkaller-bugs@...glegroups.com
Subject: [syzbot] KASAN: null-ptr-deref Write in __pm_runtime_resume

Hello,

syzbot found the following issue on:

HEAD commit:    5e63226c7228 Add linux-next specific files for 20210827
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=123771b1300000
kernel config:  https://syzkaller.appspot.com/x/.config?x=9c03a8fdabc6b3ae
dashboard link: https://syzkaller.appspot.com/bug?extid=7d41312fe3f123a6f605
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1

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+7d41312fe3f123a6f605@...kaller.appspotmail.com

==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: null-ptr-deref in atomic_inc include/linux/atomic/atomic-instrumented.h:181 [inline]
BUG: KASAN: null-ptr-deref in __pm_runtime_resume+0x154/0x180 drivers/base/power/runtime.c:1105
Write of size 4 at addr 0000000000000388 by task syz-executor.1/8810

CPU: 0 PID: 8810 Comm: syz-executor.1 Not tainted 5.14.0-rc7-next-20210827-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 __kasan_report mm/kasan/report.c:446 [inline]
 kasan_report.cold+0x66/0xdf mm/kasan/report.c:459
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic_inc include/linux/atomic/atomic-instrumented.h:181 [inline]
 __pm_runtime_resume+0x154/0x180 drivers/base/power/runtime.c:1105
 pm_runtime_get include/linux/pm_runtime.h:370 [inline]
 h5_recv+0x2c4/0x680 drivers/bluetooth/hci_h5.c:590
 hci_uart_tty_receive+0x24d/0x710 drivers/bluetooth/hci_ldisc.c:613
 tiocsti drivers/tty/tty_io.c:2311 [inline]
 tty_ioctl+0x8db/0x1600 drivers/tty/tty_io.c:2719
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc6badab188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 00000000200000c0 RSI: 0000000000005412 RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe925987cf R14: 00007fc6badab300 R15: 0000000000022000
==================================================================


---
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