Hello,
syzbot found the following issue on:
HEAD commit: 59b65efafe20 Revert "gpio: Allow per-parent interrupt data"
git tree: android13-5.10-lts
console+strace:
https://syzkaller.appspot.com/x/log.txt?x=16ead7a2a80000
kernel config:
https://syzkaller.appspot.com/x/.config?x=21b7341388eb4bd9
dashboard link:
https://syzkaller.appspot.com/bug?extid=8e06855e2fa000e0c107
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:
https://syzkaller.appspot.com/x/repro.syz?x=11597596a80000
C reproducer:
https://syzkaller.appspot.com/x/repro.c?x=11ead7a2a80000
Downloadable assets:
disk image:
https://storage.googleapis.com/syzbot-assets/af0aa144141b/disk-59b65efa.raw.xz
vmlinux:
https://storage.googleapis.com/syzbot-assets/c90c9cff963e/vmlinux-59b65efa.xz
kernel image:
https://storage.googleapis.com/syzbot-assets/81a3f67fcae6/bzImage-59b65efa.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+8e0685...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f]
CPU: 1 PID: 292 Comm: syz-executor142 Not tainted 5.10.186-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:d_really_is_positive include/linux/dcache.h:499 [inline]
RIP: 0010:fuse_atomic_open+0x27c/0x31a0 fs/fuse/dir.c:846
Code: e0 40 4c 8b 64 24 28 75 07 e8 c0 5d 6d ff eb 37 48 8b 44 24 60 48 8d 58 30 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 86 7e aa ff 48 83 3b 00 0f 84 a6 00
RSP: 0018:ffffc90000b77300 EFLAGS: 00010202
RAX: 0000000000000007 RBX: 0000000000000039 RCX: dffffc0000000000
RDX: ffff88811dee13c0 RSI: 0000000000000040 RDI: 0000000000000000
RBP: ffffc90000b77930 R08: ffffffff81fd2a0f R09: ffffed10238987bc
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811c4c3aa8
R13: ffff88811e10c800 R14: 1ffff9200016ee78 R15: 0000000000000009
FS: 00007fb2952756c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 000000011e08c000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
atomic_open fs/namei.c:3120 [inline]
lookup_open fs/namei.c:3225 [inline]
open_last_lookups fs/namei.c:3323 [inline]
path_openat+0xff0/0x3000 fs/namei.c:3512
do_filp_open+0x21c/0x460 fs/namei.c:3542
do_sys_openat2+0x13f/0x6f0 fs/open.c:1217
do_sys_open fs/open.c:1233 [inline]
__do_sys_creat fs/open.c:1307 [inline]
__se_sys_creat fs/open.c:1301 [inline]
__x64_sys_creat+0x11f/0x160 fs/open.c:1301
do_syscall_64+0x34/0x70
entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7fb2952d44b9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb295275218 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007fb2953613f8 RCX: 00007fb2952d44b9
RDX: 00007fb2952b1c46 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007fb2953613f0 R08: 00007fff21287327 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb29532e024
R13: 000000000000006e R14: 0030656c69662f30 R15: 2f30656c69662f2e
Modules linked in:
---[ end trace 88cdf4a084fb2158 ]---
RIP: 0010:d_really_is_positive include/linux/dcache.h:499 [inline]
RIP: 0010:fuse_atomic_open+0x27c/0x31a0 fs/fuse/dir.c:846
Code: e0 40 4c 8b 64 24 28 75 07 e8 c0 5d 6d ff eb 37 48 8b 44 24 60 48 8d 58 30 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 86 7e aa ff 48 83 3b 00 0f 84 a6 00
RSP: 0018:ffffc90000b77300 EFLAGS: 00010202
RAX: 0000000000000007 RBX: 0000000000000039 RCX: dffffc0000000000
RDX: ffff88811dee13c0 RSI: 0000000000000040 RDI: 0000000000000000
RBP: ffffc90000b77930 R08: ffffffff81fd2a0f R09: ffffed10238987bc
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811c4c3aa8
R13: ffff88811e10c800 R14: 1ffff9200016ee78 R15: 0000000000000009
FS: 00007fb2952756c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020005000 CR3: 000000011e08c000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: e0 40 loopne 0x42
2: 4c 8b 64 24 28 mov 0x28(%rsp),%r12
7: 75 07 jne 0x10
9: e8 c0 5d 6d ff call 0xff6d5dce
e: eb 37 jmp 0x47
10: 48 8b 44 24 60 mov 0x60(%rsp),%rax
15: 48 8d 58 30 lea 0x30(%rax),%rbx
19: 48 89 d8 mov %rbx,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
27: fc ff df
* 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction
2e: 74 08 je 0x38
30: 48 89 df mov %rbx,%rdi
33: e8 86 7e aa ff call 0xffaa7ebe
38: 48 83 3b 00 cmpq $0x0,(%rbx)
3c: 0f .byte 0xf
3d: 84 .byte 0x84
3e: a6 cmpsb %es:(%rdi),%ds:(%rsi)
---
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