[Android 5.10] general protection fault in do_renameat2

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: a27512601c2d Merge 5.10.194 into android13-5.10-lts
git tree: android13-5.10-lts
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1393b3e8680000
kernel config: https://syzkaller.appspot.com/x/.config?x=c1c2ce51f851d2f6
dashboard link: https://syzkaller.appspot.com/bug?extid=1073bb7aa0d1b919f9a7
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=17f69ea0680000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15ca1f30680000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/da4c10f4a7cd/disk-a2751260.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4d65589a1227/vmlinux-a2751260.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a8c5b14df758/bzImage-a2751260.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1073bb...@syzkaller.appspotmail.com

general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 0 PID: 288 Comm: syz-executor140 Not tainted 5.10.194-syzkaller-00508-ga27512601c2d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:__d_entry_type include/linux/dcache.h:400 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:405 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:451 [inline]
RIP: 0010:do_renameat2+0x5e6/0x1130 fs/namei.c:4563
Code: 89 de 8b 54 24 3c e8 09 31 ff ff 49 89 c5 48 3d 01 f0 ff ff 72 0d e8 49 a0 b6 ff 44 89 eb e9 d7 03 00 00 4d 89 ec 49 c1 ec 03 <43> 0f b6 04 3c 84 c0 0f 85 d6 05 00 00 41 8b 5d 00 be 00 00 70 00
RSP: 0018:ffffc9000094fd00 EFLAGS: 00010202
RAX: 0000000000000010 RBX: ffff88811c496110 RCX: ffff88811e4093c0
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: ffffc9000094ff08 R08: ffffffff81b62ffb R09: ffffed1023892c2e
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000002
R13: 0000000000000010 R14: 00000000ffffff01 R15: dffffc0000000000
FS: 00007fb43311c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb4330fbd58 CR3: 000000011e3d8000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__do_sys_rename fs/namei.c:4656 [inline]
__se_sys_rename fs/namei.c:4654 [inline]
__x64_sys_rename+0x86/0x90 fs/namei.c:4654
do_syscall_64+0x34/0x70
entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7fb43315a2b9
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:00007fb43311c218 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fb4331e3408 RCX: 00007fb43315a2b9
RDX: 00007fb43315a2b9 RSI: 0000000020000140 RDI: 0000000020000100
RBP: 00007fb4331e3400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb4331b1018
R13: 0030656c69662f2e R14: 0030656c69662f30 R15: 00007fb4331b100e
Modules linked in:
---[ end trace 3e7f437283b4f10e ]---
RIP: 0010:__d_entry_type include/linux/dcache.h:400 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:405 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:451 [inline]
RIP: 0010:do_renameat2+0x5e6/0x1130 fs/namei.c:4563
Code: 89 de 8b 54 24 3c e8 09 31 ff ff 49 89 c5 48 3d 01 f0 ff ff 72 0d e8 49 a0 b6 ff 44 89 eb e9 d7 03 00 00 4d 89 ec 49 c1 ec 03 <43> 0f b6 04 3c 84 c0 0f 85 d6 05 00 00 41 8b 5d 00 be 00 00 70 00
RSP: 0018:ffffc9000094fd00 EFLAGS: 00010202
RAX: 0000000000000010 RBX: ffff88811c496110 RCX: ffff88811e4093c0
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: ffffc9000094ff08 R08: ffffffff81b62ffb R09: ffffed1023892c2e
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000002
R13: 0000000000000010 R14: 00000000ffffff01 R15: dffffc0000000000
FS: 00007fb43311c6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb4331b0e98 CR3: 000000011e3d8000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 89 de mov %ebx,%esi
2: 8b 54 24 3c mov 0x3c(%rsp),%edx
6: e8 09 31 ff ff call 0xffff3114
b: 49 89 c5 mov %rax,%r13
e: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax
14: 72 0d jb 0x23
16: e8 49 a0 b6 ff call 0xffb6a064
1b: 44 89 eb mov %r13d,%ebx
1e: e9 d7 03 00 00 jmp 0x3fa
23: 4d 89 ec mov %r13,%r12
26: 49 c1 ec 03 shr $0x3,%r12
* 2a: 43 0f b6 04 3c movzbl (%r12,%r15,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 d6 05 00 00 jne 0x60d
37: 41 8b 5d 00 mov 0x0(%r13),%ebx
3b: be 00 00 70 00 mov $0x700000,%esi


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: d3212c2dbaba UPSTREAM: sched/rt: Fix bad task migration fo..
git tree: android14-6.1
console+strace: https://syzkaller.appspot.com/x/log.txt?x=10033ac4680000
kernel config: https://syzkaller.appspot.com/x/.config?x=c5b8b7a65c87c651
dashboard link: https://syzkaller.appspot.com/bug?extid=0440f4da8a24a4698145

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=13f4a1ac680000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14248d74680000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/cd5cbdff4d03/disk-d3212c2d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/066745d128e5/vmlinux-d3212c2d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2bdedc5765f6/bzImage-d3212c2d.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:

Reported-by: syzbot+0440f4...@syzkaller.appspotmail.com

general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]

CPU: 1 PID: 295 Comm: syz-executor305 Not tainted 6.1.25-syzkaller-00013-gd3212c2dbaba #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:__d_entry_type include/linux/dcache.h:394 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:399 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:445 [inline]
RIP: 0010:do_renameat2+0x62e/0x1480 fs/namei.c:4879
Code: 18 09 ad ff 41 89 de 4c 8b 64 24 40 e9 0f 06 00 00 4c 89 b4 24 f0 00 00 00 49 89 de 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 06 84 c0 4c 8b 64 24 40 0f 85 2d 08 00 00 48 89 1c 24
RSP: 0018:ffffc90000e37c40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffff88810967bcc0

RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000

RBP: ffffc90000e37ef8 R08: ffffffff81ca097b R09: fffff520001c6f67
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff88811f496330 R14: 0000000000000002 R15: ffff88810eb34020
FS: 00007f45165966c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 00007f4516575d58 CR3: 00000001214d2000 CR4: 00000000003506a0

DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Call Trace:
<TASK>
__do_sys_rename fs/namei.c:4976 [inline]
__se_sys_rename fs/namei.c:4974 [inline]
__x64_sys_rename+0x86/0x90 fs/namei.c:4974
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f45165d42b9

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:00007f4516596218 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f451665d408 RCX: 00007f45165d42b9
RDX: 00007f45165d42b9 RSI: 0000000020000140 RDI: 0000000020000100
RBP: 00007f451665d400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f451662b018
R13: 0030656c69662f2e R14: 0030656c69662f30 R15: 00007f451662b00e
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__d_entry_type include/linux/dcache.h:394 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:399 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:445 [inline]
RIP: 0010:do_renameat2+0x62e/0x1480 fs/namei.c:4879
Code: 18 09 ad ff 41 89 de 4c 8b 64 24 40 e9 0f 06 00 00 4c 89 b4 24 f0 00 00 00 49 89 de 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 06 84 c0 4c 8b 64 24 40 0f 85 2d 08 00 00 48 89 1c 24
RSP: 0018:ffffc90000e37c40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffff88810967bcc0

RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000

RBP: ffffc90000e37ef8 R08: ffffffff81ca097b R09: fffff520001c6f67
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff88811f496330 R14: 0000000000000002 R15: ffff88810eb34020
FS: 00007f45165966c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 00007f4516575d58 CR3: 00000001214d2000 CR4: 00000000003506a0

DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):

0: 18 09 sbb %cl,(%rcx)
2: ad lods %ds:(%rsi),%eax
3: ff 41 89 incl -0x77(%rcx)
6: de 4c 8b 64 fimuls 0x64(%rbx,%rcx,4)
a: 24 40 and $0x40,%al
c: e9 0f 06 00 00 jmp 0x620
11: 4c 89 b4 24 f0 00 00 mov %r14,0xf0(%rsp)
18: 00
19: 49 89 de mov %rbx,%r14
1c: 49 c1 ee 03 shr $0x3,%r14
20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
27: fc ff df
* 2a: 41 0f b6 04 06 movzbl (%r14,%rax,1),%eax <-- trapping instruction

2f: 84 c0 test %al,%al

31: 4c 8b 64 24 40 mov 0x40(%rsp),%r12
36: 0f 85 2d 08 00 00 jne 0x869
3c: 48 89 1c 24 mov %rbx,(%rsp)

[syzbot]

Bug presence analysis results: the bug reproduces only on Android 6.1.

syzbot has run the reproducer on other relevant kernel trees and got
the following results:

android14-6.1 (commit d3212c2dbaba) on 2023/09/17:
general protection fault in do_renameat2
Report: https://syzkaller.appspot.com/x/report.txt?x=17bfd29c680000

lts (commit b1644a0031cf) on 2023/09/17:
Didn't crash.

upstream (commit f0b0d403eabb) on 2023/09/17:
Didn't crash.

More details can be found at:
https://syzkaller.appspot.com/bug?extid=0440f4da8a24a4698145

[syzbot]

syzbot has bisected this issue to:

commit 57f3ff9648991998d008ecf32f2f9e78a08bfb8b
Author: Daniel Rosenberg <dro...@google.com>
Date: Thu Dec 2 21:50:02 2021 +0000

ANDROID: fuse-bpf v1.1

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13ecff52680000
start commit: d3212c2dbaba UPSTREAM: sched/rt: Fix bad task migration fo..
git tree: android14-6.1
final oops: https://syzkaller.appspot.com/x/report.txt?x=101cff52680000
console output: https://syzkaller.appspot.com/x/log.txt?x=17ecff52680000

kernel config: https://syzkaller.appspot.com/x/.config?x=c5b8b7a65c87c651
dashboard link: https://syzkaller.appspot.com/bug?extid=0440f4da8a24a4698145

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13f4a1ac680000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14248d74680000

Reported-by: syzbot+0440f4...@syzkaller.appspotmail.com
Fixes: 57f3ff964899 ("ANDROID: fuse-bpf v1.1")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: ea586874d2f9 Merge 5.15.131 into android13-5.15-lts
git tree: android13-5.15-lts
console+strace: https://syzkaller.appspot.com/x/log.txt?x=177d9f5c680000
kernel config: https://syzkaller.appspot.com/x/.config?x=8c01766ad16ac177
dashboard link: https://syzkaller.appspot.com/bug?extid=3983560c9946a34ea12c

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=16bfcb5a680000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12cdc6ca680000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e84dfa4dc7ef/disk-ea586874.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b16cac25a266/vmlinux-ea586874.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8aee32c39a67/bzImage-ea586874.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:

Reported-by: syzbot+398356...@syzkaller.appspotmail.com

general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]

CPU: 0 PID: 292 Comm: syz-executor166 Not tainted 5.15.131-syzkaller-00653-gea586874d2f9 #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023

RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline]
RIP: 0010:do_renameat2+0x62e/0x1480 fs/namei.c:4841
Code: 08 3c b2 ff 41 89 de 4c 8b 64 24 40 e9 0f 06 00 00 4c 89 b4 24 f0 00 00 00 49 89 de 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 06 84 c0 4c 8b 64 24 40 0f 85 2d 08 00 00 48 89 1c 24
RSP: 0018:ffffc900007d7c40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffff88811e98cf00

RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000

RBP: ffffc900007d7ef8 R08: ffffffff81bff470 R09: ffffed1023929072

R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000

R13: ffff88811c948330 R14: 0000000000000002 R15: ffff8881001c1520
FS: 00007ff35cb9e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 00005621ec0cc318 CR3: 000000011e641000 CR4: 00000000003506b0

DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>

__do_sys_rename fs/namei.c:4938 [inline]
__se_sys_rename fs/namei.c:4936 [inline]
__x64_sys_rename+0x86/0x90 fs/namei.c:4936

do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80

entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7ff35cbdc2b9

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:00007ff35cb9e218 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007ff35cc65408 RCX: 00007ff35cbdc2b9
RDX: 00007ff35cbdc2b9 RSI: 0000000020000140 RDI: 0000000020000100
RBP: 00007ff35cc65400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff35cc33018
R13: 0030656c69662f2e R14: 0030656c69662f30 R15: 00007ff35cc3300e
</TASK>
Modules linked in:
---[ end trace a020432d5589457c ]---
RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline]
RIP: 0010:do_renameat2+0x62e/0x1480 fs/namei.c:4841
Code: 08 3c b2 ff 41 89 de 4c 8b 64 24 40 e9 0f 06 00 00 4c 89 b4 24 f0 00 00 00 49 89 de 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 06 84 c0 4c 8b 64 24 40 0f 85 2d 08 00 00 48 89 1c 24
RSP: 0018:ffffc900007d7c40 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffff88811e98cf00

RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000

RBP: ffffc900007d7ef8 R08: ffffffff81bff470 R09: ffffed1023929072

R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000

R13: ffff88811c948330 R14: 0000000000000002 R15: ffff8881001c1520
FS: 00007ff35cb9e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 00005621ec0cc318 CR3: 000000011e641000 CR4: 00000000003506b0

DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):

0: 08 3c b2 or %bh,(%rdx,%rsi,4)