[syzbot] [dri?] kernel BUG in vmf_insert_pfn_prot (2)
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syzbot
Aug 24, 2023, 3:01:15 AM8/24/23
to air...@gmail.com, christia...@amd.com, dan...@ffwll.ch, dri-...@lists.freedesktop.org, linaro...@lists.linaro.org, linux-...@vger.kernel.org, linux...@vger.kernel.org, maarten....@linux.intel.com, mri...@kernel.org, sumit....@linaro.org, syzkall...@googlegroups.com, tzimm...@suse.de
Hello,
syzbot found the following issue on:
HEAD commit: 9e6c269de404 Merge tag 'i2c-for-6.5-rc7' of git://git.kern..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=110b32d3a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=aa796b6080b04102
dashboard link: https://syzkaller.appspot.com/bug?extid=398e17b61dab22cc56bc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14284307a80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/481d8421bfb2/disk-9e6c269d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5ec626f94634/vmlinux-9e6c269d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ab1e59619bd6/bzImage-9e6c269d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+398e17...@syzkaller.appspotmail.com
------------[ cut here ]------------
kernel BUG at mm/memory.c:2214!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5157 Comm: syz-executor.3 Not tainted 6.5.0-rc6-syzkaller-00253-g9e6c269de404 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:vmf_insert_pfn_prot+0x247/0x430 mm/memory.c:2214
Code: 0f 0b e8 0c 4f c0 ff 49 89 ef bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 88 4a c0 ff 49 83 ff 20 0f 85 aa fe ff ff e8 e9 4e c0 ff <0f> 0b 48 bd ff ff ff ff ff ff 0f 00 e8 d8 4e c0 ff 4c 89 f6 48 89
RSP: 0018:ffffc9000415f750 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880275a0d00 RCX: 0000000000000000
RDX: ffff888018379dc0 RSI: ffffffff81c5b9b7 RDI: 0000000000000007
RBP: 000000000c140477 R08: 0000000000000007 R09: 0000000000000020
R10: 0000000000000020 R11: 000000000000001f R12: 0000000020ffc000
R13: 1ffff9200082beeb R14: 000000000007e79e R15: 0000000000000020
FS: 00007f235bd9a6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020ffc000 CR3: 0000000022a32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
drm_gem_shmem_fault+0x1ea/0x3a0 drivers/gpu/drm/drm_gem_shmem_helper.c:563
__do_fault+0x107/0x5f0 mm/memory.c:4198
do_read_fault mm/memory.c:4547 [inline]
do_fault mm/memory.c:4670 [inline]
do_pte_missing mm/memory.c:3664 [inline]
handle_pte_fault mm/memory.c:4939 [inline]
__handle_mm_fault+0x27e0/0x3b80 mm/memory.c:5079
handle_mm_fault+0x2ab/0x9d0 mm/memory.c:5233
do_user_addr_fault+0x446/0xfc0 arch/x86/mm/fault.c:1392
handle_page_fault arch/x86/mm/fault.c:1486 [inline]
exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1542
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:rep_movs_alternative+0x4a/0xb0 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 <f3> a4 c3 0f 1f 00 4c 8b 06 4c 8b 4e 08 4c 8b 56 10 4c 8b 5e 18 4c
RSP: 0018:ffffc9000415fb50 EFLAGS: 00050206
RAX: 0000000000000001 RBX: 0000000020ffc000 RCX: 0000000000001000
RDX: 0000000000000000 RSI: 0000000020ffc000 RDI: ffff88807b764000
RBP: 0000000000001000 R08: 0000000000000001 R09: ffffed100f6ec9ff
R10: ffff88807b764fff R11: 0000000000000000 R12: 0000000020ffd000
R13: ffff88807b764000 R14: 0000000000000000 R15: 0000000020ffc000
copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:127 [inline]
_copy_from_user+0xc2/0xf0 lib/usercopy.c:23
copy_from_user include/linux/uaccess.h:183 [inline]
snd_rawmidi_kernel_write1+0x360/0x860 sound/core/rawmidi.c:1618
snd_rawmidi_write+0x278/0xc10 sound/core/rawmidi.c:1687
vfs_write+0x2a4/0xe40 fs/read_write.c:582
ksys_write+0x1f0/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f235b07cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007f235bd9a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f235b19bf80 RCX: 00007f235b07cae9
RDX: 00000000fffffd2c RSI: 0000000020000000 RDI: 0000000000000005
RBP: 00007f235b0c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f235b19bf80 R15: 00007ffd9cdf0fe8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vmf_insert_pfn_prot+0x247/0x430 mm/memory.c:2214
Code: 0f 0b e8 0c 4f c0 ff 49 89 ef bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 88 4a c0 ff 49 83 ff 20 0f 85 aa fe ff ff e8 e9 4e c0 ff <0f> 0b 48 bd ff ff ff ff ff ff 0f 00 e8 d8 4e c0 ff 4c 89 f6 48 89
RSP: 0018:ffffc9000415f750 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880275a0d00 RCX: 0000000000000000
RDX: ffff888018379dc0 RSI: ffffffff81c5b9b7 RDI: 0000000000000007
RBP: 000000000c140477 R08: 0000000000000007 R09: 0000000000000020
R10: 0000000000000020 R11: 000000000000001f R12: 0000000020ffc000
R13: 1ffff9200082beeb R14: 000000000007e79e R15: 0000000000000020
FS: 00007f235bd9a6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f93c20ffac1 CR3: 0000000022a32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 75 f1 jne 0xfffffff3
2: c3 ret
3: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
a: 00 00 00 00
e: 66 90 xchg %ax,%ax
10: 48 8b 06 mov (%rsi),%rax
13: 48 89 07 mov %rax,(%rdi)
16: 48 83 c6 08 add $0x8,%rsi
1a: 48 83 c7 08 add $0x8,%rdi
1e: 83 e9 08 sub $0x8,%ecx
21: 74 df je 0x2
23: 83 f9 08 cmp $0x8,%ecx
26: 73 e8 jae 0x10
28: eb c9 jmp 0xfffffff3
* 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction
2c: c3 ret
2d: 0f 1f 00 nopl (%rax)
30: 4c 8b 06 mov (%rsi),%r8
33: 4c 8b 4e 08 mov 0x8(%rsi),%r9
37: 4c 8b 56 10 mov 0x10(%rsi),%r10
3b: 4c 8b 5e 18 mov 0x18(%rsi),%r11
3f: 4c rex.WR
---
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 found the following issue on:
HEAD commit: 9e6c269de404 Merge tag 'i2c-for-6.5-rc7' of git://git.kern..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=110b32d3a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=aa796b6080b04102
dashboard link: https://syzkaller.appspot.com/bug?extid=398e17b61dab22cc56bc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14284307a80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/481d8421bfb2/disk-9e6c269d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5ec626f94634/vmlinux-9e6c269d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ab1e59619bd6/bzImage-9e6c269d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+398e17...@syzkaller.appspotmail.com
------------[ cut here ]------------
kernel BUG at mm/memory.c:2214!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5157 Comm: syz-executor.3 Not tainted 6.5.0-rc6-syzkaller-00253-g9e6c269de404 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:vmf_insert_pfn_prot+0x247/0x430 mm/memory.c:2214
Code: 0f 0b e8 0c 4f c0 ff 49 89 ef bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 88 4a c0 ff 49 83 ff 20 0f 85 aa fe ff ff e8 e9 4e c0 ff <0f> 0b 48 bd ff ff ff ff ff ff 0f 00 e8 d8 4e c0 ff 4c 89 f6 48 89
RSP: 0018:ffffc9000415f750 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880275a0d00 RCX: 0000000000000000
RDX: ffff888018379dc0 RSI: ffffffff81c5b9b7 RDI: 0000000000000007
RBP: 000000000c140477 R08: 0000000000000007 R09: 0000000000000020
R10: 0000000000000020 R11: 000000000000001f R12: 0000000020ffc000
R13: 1ffff9200082beeb R14: 000000000007e79e R15: 0000000000000020
FS: 00007f235bd9a6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020ffc000 CR3: 0000000022a32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
drm_gem_shmem_fault+0x1ea/0x3a0 drivers/gpu/drm/drm_gem_shmem_helper.c:563
__do_fault+0x107/0x5f0 mm/memory.c:4198
do_read_fault mm/memory.c:4547 [inline]
do_fault mm/memory.c:4670 [inline]
do_pte_missing mm/memory.c:3664 [inline]
handle_pte_fault mm/memory.c:4939 [inline]
__handle_mm_fault+0x27e0/0x3b80 mm/memory.c:5079
handle_mm_fault+0x2ab/0x9d0 mm/memory.c:5233
do_user_addr_fault+0x446/0xfc0 arch/x86/mm/fault.c:1392
handle_page_fault arch/x86/mm/fault.c:1486 [inline]
exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1542
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:rep_movs_alternative+0x4a/0xb0 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 <f3> a4 c3 0f 1f 00 4c 8b 06 4c 8b 4e 08 4c 8b 56 10 4c 8b 5e 18 4c
RSP: 0018:ffffc9000415fb50 EFLAGS: 00050206
RAX: 0000000000000001 RBX: 0000000020ffc000 RCX: 0000000000001000
RDX: 0000000000000000 RSI: 0000000020ffc000 RDI: ffff88807b764000
RBP: 0000000000001000 R08: 0000000000000001 R09: ffffed100f6ec9ff
R10: ffff88807b764fff R11: 0000000000000000 R12: 0000000020ffd000
R13: ffff88807b764000 R14: 0000000000000000 R15: 0000000020ffc000
copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:127 [inline]
_copy_from_user+0xc2/0xf0 lib/usercopy.c:23
copy_from_user include/linux/uaccess.h:183 [inline]
snd_rawmidi_kernel_write1+0x360/0x860 sound/core/rawmidi.c:1618
snd_rawmidi_write+0x278/0xc10 sound/core/rawmidi.c:1687
vfs_write+0x2a4/0xe40 fs/read_write.c:582
ksys_write+0x1f0/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f235b07cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007f235bd9a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f235b19bf80 RCX: 00007f235b07cae9
RDX: 00000000fffffd2c RSI: 0000000020000000 RDI: 0000000000000005
RBP: 00007f235b0c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f235b19bf80 R15: 00007ffd9cdf0fe8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vmf_insert_pfn_prot+0x247/0x430 mm/memory.c:2214
Code: 0f 0b e8 0c 4f c0 ff 49 89 ef bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 88 4a c0 ff 49 83 ff 20 0f 85 aa fe ff ff e8 e9 4e c0 ff <0f> 0b 48 bd ff ff ff ff ff ff 0f 00 e8 d8 4e c0 ff 4c 89 f6 48 89
RSP: 0018:ffffc9000415f750 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880275a0d00 RCX: 0000000000000000
RDX: ffff888018379dc0 RSI: ffffffff81c5b9b7 RDI: 0000000000000007
RBP: 000000000c140477 R08: 0000000000000007 R09: 0000000000000020
R10: 0000000000000020 R11: 000000000000001f R12: 0000000020ffc000
R13: 1ffff9200082beeb R14: 000000000007e79e R15: 0000000000000020
FS: 00007f235bd9a6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f93c20ffac1 CR3: 0000000022a32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 75 f1 jne 0xfffffff3
2: c3 ret
3: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
a: 00 00 00 00
e: 66 90 xchg %ax,%ax
10: 48 8b 06 mov (%rsi),%rax
13: 48 89 07 mov %rax,(%rdi)
16: 48 83 c6 08 add $0x8,%rsi
1a: 48 83 c7 08 add $0x8,%rdi
1e: 83 e9 08 sub $0x8,%ecx
21: 74 df je 0x2
23: 83 f9 08 cmp $0x8,%ecx
26: 73 e8 jae 0x10
28: eb c9 jmp 0xfffffff3
* 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction
2c: c3 ret
2d: 0f 1f 00 nopl (%rax)
30: 4c 8b 06 mov (%rsi),%r8
33: 4c 8b 4e 08 mov 0x8(%rsi),%r9
37: 4c 8b 56 10 mov 0x10(%rsi),%r10
3b: 4c 8b 5e 18 mov 0x18(%rsi),%r11
3f: 4c rex.WR
---
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
Hillf Danton
Aug 24, 2023, 7:36:15 PM8/24/23
to syzbot, linux-...@vger.kernel.org, syzkall...@googlegroups.com
On Thu, 24 Aug 2023 00:01:13 -0700
Bail out in case of pfn cow mapping.
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
--- x/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ y/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -644,6 +644,8 @@ int drm_gem_shmem_mmap(struct drm_gem_sh
return ret;
vm_flags_set(vma, VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP);
+ if ((vma->vm_flags & VM_PFNMAP) && is_cow_mapping(vma->vm_flags))
+ return -EINVAL;
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
if (shmem->map_wc)
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
--
> HEAD commit: 9e6c269de404 Merge tag 'i2c-for-6.5-rc7' of git://git.kern..
> git tree: upstream
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14284307a80000
> git tree: upstream
Bail out in case of pfn cow mapping.
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
--- x/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ y/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -644,6 +644,8 @@ int drm_gem_shmem_mmap(struct drm_gem_sh
return ret;
vm_flags_set(vma, VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP);
+ if ((vma->vm_flags & VM_PFNMAP) && is_cow_mapping(vma->vm_flags))
+ return -EINVAL;
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
if (shmem->map_wc)
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
--
syzbot
Aug 24, 2023, 9:24:26 PM8/24/23
to hda...@sina.com, linux-...@vger.kernel.org, syzkall...@googlegroups.com
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-and-tested-by: syzbot+398e17...@syzkaller.appspotmail.com
Tested on:
commit: f8d6ff44 Merge tag 'nfsd-6.5-5' of git://git.kernel.or..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=160a9a87a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=1e4a882f77ed77bd
Note: testing is done by a robot and is best-effort only.
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-and-tested-by: syzbot+398e17...@syzkaller.appspotmail.com
Tested on:
commit: f8d6ff44 Merge tag 'nfsd-6.5-5' of git://git.kernel.or..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=160a9a87a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=1e4a882f77ed77bd
dashboard link: https://syzkaller.appspot.com/bug?extid=398e17b61dab22cc56bc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=17eefce0680000
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
Note: testing is done by a robot and is best-effort only.
syzbot
Nov 6, 2023, 6:25:23 PM11/6/23
to air...@gmail.com, christia...@amd.com, dan...@ffwll.ch, dri-...@lists.freedesktop.org, hda...@sina.com, linaro-mm-...@lists.linaro.org, linaro...@lists.linaro.org, linux-...@vger.kernel.org, linux...@vger.kernel.org, maarten....@linux.intel.com, mri...@kernel.org, sumit....@linaro.org, syzkall...@googlegroups.com, tzimm...@suse.de
syzbot has found a reproducer for the following issue on:
HEAD commit: d2f51b3516da Merge tag 'rtc-6.7' of git://git.kernel.org/p..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1422ebef680000
kernel config: https://syzkaller.appspot.com/x/.config?x=1ffa1cec3b40f3ce
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=156bb2c0e80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/01a7f380fc8d/disk-d2f51b35.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c2fe46c74542/vmlinux-d2f51b35.xz
kernel image: https://storage.googleapis.com/syzbot-assets/247d6a0567c5/bzImage-d2f51b35.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+398e17...@syzkaller.appspotmail.com
------------[ cut here ]------------
kernel BUG at mm/memory.c:2216!
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:vmf_insert_pfn_prot+0x247/0x430 mm/memory.c:2216
Code: 0f 0b e8 7c e6 bd ff 49 89 ef bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 f8 e1 bd ff 49 83 ff 20 0f 85 aa fe ff ff e8 59 e6 bd ff <0f> 0b 48 bd ff ff ff ff ff ff 0f 00 e8 48 e6 bd ff 4c 89 f6 48 89
RSP: 0018:ffffc90003bbf758 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88802847ec00 RCX: ffffffff81cab618
RDX: ffff888015bd1dc0 RSI: ffffffff81cab627 RDI: 0000000000000007
RBP: 000000000c040474 R08: 0000000000000007 R09: 0000000000000020
R10: 0000000000000020 R11: 0000000000000009 R12: 0000000020ffd000
R13: 1ffff92000777eec R14: 000000000001e529 R15: 0000000000000020
FS: 0000555555e2a480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
__do_fault+0x107/0x5f0 mm/memory.c:4265
do_read_fault mm/memory.c:4628 [inline]
do_fault mm/memory.c:4762 [inline]
do_pte_missing mm/memory.c:3730 [inline]
handle_pte_fault mm/memory.c:5038 [inline]
__handle_mm_fault+0x2682/0x3d60 mm/memory.c:5179
handle_mm_fault+0x478/0xa00 mm/memory.c:5344
do_user_addr_fault+0x3d1/0x1000 arch/x86/mm/fault.c:1413
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1561
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 <f3> a4 c3 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1 85 c9 75 b3
RSP: 0018:ffffc90003bbfb50 EFLAGS: 00050206
RAX: 0000000000000001 RBX: 0000000020ffd000 RCX: 0000000000001000
RDX: 0000000000000000 RSI: 0000000020ffd000 RDI: ffff888018796000
RBP: 0000000000001000 R08: 0000000000000001 R09: ffffed10030f2dff
R10: ffff888018796fff R11: 0000000000000000 R12: 0000000020ffe000
R13: ffff888018796000 R14: 0000000000000000 R15: 0000000020ffd000
vfs_write+0x2a4/0xdf0 fs/read_write.c:582
ksys_write+0x1f0/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f31add88d69
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdd9a49ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffdd9a49f00 RCX: 00007f31add88d69
RDX: 00000000fffffd2c RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007ffdd9a49f08 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffdd9a49f08 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdd9a4a168 R14: 0000000000000001 R15: 0000000000000001
Code: 0f 0b e8 7c e6 bd ff 49 89 ef bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 f8 e1 bd ff 49 83 ff 20 0f 85 aa fe ff ff e8 59 e6 bd ff <0f> 0b 48 bd ff ff ff ff ff ff 0f 00 e8 48 e6 bd ff 4c 89 f6 48 89
RSP: 0018:ffffc90003bbf758 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88802847ec00 RCX: ffffffff81cab618
RDX: ffff888015bd1dc0 RSI: ffffffff81cab627 RDI: 0000000000000007
RBP: 000000000c040474 R08: 0000000000000007 R09: 0000000000000020
R10: 0000000000000020 R11: 0000000000000009 R12: 0000000020ffd000
R13: 1ffff92000777eec R14: 000000000001e529 R15: 0000000000000020
FS: 0000555555e2a480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
30: 48 c1 e9 03 shr $0x3,%rcx
34: 83 e0 07 and $0x7,%eax
37: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi)
3a: 89 c1 mov %eax,%ecx
3c: 85 c9 test %ecx,%ecx
3e: 75 b3 jne 0xfffffff3
---
HEAD commit: d2f51b3516da Merge tag 'rtc-6.7' of git://git.kernel.org/p..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1422ebef680000
kernel config: https://syzkaller.appspot.com/x/.config?x=1ffa1cec3b40f3ce
dashboard link: https://syzkaller.appspot.com/bug?extid=398e17b61dab22cc56bc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16344918e80000
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=156bb2c0e80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/01a7f380fc8d/disk-d2f51b35.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c2fe46c74542/vmlinux-d2f51b35.xz
kernel image: https://storage.googleapis.com/syzbot-assets/247d6a0567c5/bzImage-d2f51b35.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+398e17...@syzkaller.appspotmail.com
------------[ cut here ]------------
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5067 Comm: syz-executor340 Not tainted 6.6.0-syzkaller-14651-gd2f51b3516da #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:vmf_insert_pfn_prot+0x247/0x430 mm/memory.c:2216
Code: 0f 0b e8 7c e6 bd ff 49 89 ef bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 f8 e1 bd ff 49 83 ff 20 0f 85 aa fe ff ff e8 59 e6 bd ff <0f> 0b 48 bd ff ff ff ff ff ff 0f 00 e8 48 e6 bd ff 4c 89 f6 48 89
RSP: 0018:ffffc90003bbf758 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88802847ec00 RCX: ffffffff81cab618
RDX: ffff888015bd1dc0 RSI: ffffffff81cab627 RDI: 0000000000000007
RBP: 000000000c040474 R08: 0000000000000007 R09: 0000000000000020
R10: 0000000000000020 R11: 0000000000000009 R12: 0000000020ffd000
R13: 1ffff92000777eec R14: 000000000001e529 R15: 0000000000000020
FS: 0000555555e2a480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020ffd000 CR3: 000000002aae7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
drm_gem_shmem_fault+0x207/0x400 drivers/gpu/drm/drm_gem_shmem_helper.c:531
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__do_fault+0x107/0x5f0 mm/memory.c:4265
do_read_fault mm/memory.c:4628 [inline]
do_fault mm/memory.c:4762 [inline]
do_pte_missing mm/memory.c:3730 [inline]
handle_pte_fault mm/memory.c:5038 [inline]
__handle_mm_fault+0x2682/0x3d60 mm/memory.c:5179
handle_mm_fault+0x478/0xa00 mm/memory.c:5344
do_user_addr_fault+0x3d1/0x1000 arch/x86/mm/fault.c:1413
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1561
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 <f3> a4 c3 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1 85 c9 75 b3
RSP: 0018:ffffc90003bbfb50 EFLAGS: 00050206
RAX: 0000000000000001 RBX: 0000000020ffd000 RCX: 0000000000001000
RDX: 0000000000000000 RSI: 0000000020ffd000 RDI: ffff888018796000
RBP: 0000000000001000 R08: 0000000000000001 R09: ffffed10030f2dff
R10: ffff888018796fff R11: 0000000000000000 R12: 0000000020ffe000
R13: ffff888018796000 R14: 0000000000000000 R15: 0000000020ffd000
copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:127 [inline]
_copy_from_user+0xc2/0xf0 lib/usercopy.c:23
copy_from_user include/linux/uaccess.h:183 [inline]
snd_rawmidi_kernel_write1+0x360/0x860 sound/core/rawmidi.c:1618
snd_rawmidi_write+0x26e/0xc00 sound/core/rawmidi.c:1687
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:127 [inline]
_copy_from_user+0xc2/0xf0 lib/usercopy.c:23
copy_from_user include/linux/uaccess.h:183 [inline]
snd_rawmidi_kernel_write1+0x360/0x860 sound/core/rawmidi.c:1618
vfs_write+0x2a4/0xdf0 fs/read_write.c:582
ksys_write+0x1f0/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f31add88d69
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdd9a49ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffdd9a49f00 RCX: 00007f31add88d69
RDX: 00000000fffffd2c RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007ffdd9a49f08 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffdd9a49f08 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdd9a4a168 R14: 0000000000000001 R15: 0000000000000001
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vmf_insert_pfn_prot+0x247/0x430 mm/memory.c:2216
Modules linked in:
---[ end trace 0000000000000000 ]---
Code: 0f 0b e8 7c e6 bd ff 49 89 ef bf 20 00 00 00 41 83 e7 28 4c 89 fe e8 f8 e1 bd ff 49 83 ff 20 0f 85 aa fe ff ff e8 59 e6 bd ff <0f> 0b 48 bd ff ff ff ff ff ff 0f 00 e8 48 e6 bd ff 4c 89 f6 48 89
RSP: 0018:ffffc90003bbf758 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88802847ec00 RCX: ffffffff81cab618
RDX: ffff888015bd1dc0 RSI: ffffffff81cab627 RDI: 0000000000000007
RBP: 000000000c040474 R08: 0000000000000007 R09: 0000000000000020
R10: 0000000000000020 R11: 0000000000000009 R12: 0000000020ffd000
R13: 1ffff92000777eec R14: 000000000001e529 R15: 0000000000000020
FS: 0000555555e2a480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020acb000 CR3: 000000002aae7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 75 f1 jne 0xfffffff3
2: c3 ret
3: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
a: 00 00 00 00
e: 66 90 xchg %ax,%ax
10: 48 8b 06 mov (%rsi),%rax
13: 48 89 07 mov %rax,(%rdi)
16: 48 83 c6 08 add $0x8,%rsi
1a: 48 83 c7 08 add $0x8,%rdi
1e: 83 e9 08 sub $0x8,%ecx
21: 74 df je 0x2
23: 83 f9 08 cmp $0x8,%ecx
26: 73 e8 jae 0x10
28: eb c9 jmp 0xfffffff3
* 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction
2c: c3 ret
2d: 48 89 c8 mov %rcx,%rax
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 75 f1 jne 0xfffffff3
2: c3 ret
3: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
a: 00 00 00 00
e: 66 90 xchg %ax,%ax
10: 48 8b 06 mov (%rsi),%rax
13: 48 89 07 mov %rax,(%rdi)
16: 48 83 c6 08 add $0x8,%rsi
1a: 48 83 c7 08 add $0x8,%rdi
1e: 83 e9 08 sub $0x8,%ecx
21: 74 df je 0x2
23: 83 f9 08 cmp $0x8,%ecx
26: 73 e8 jae 0x10
28: eb c9 jmp 0xfffffff3
* 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction
2c: c3 ret
30: 48 c1 e9 03 shr $0x3,%rcx
34: 83 e0 07 and $0x7,%eax
37: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi)
3a: 89 c1 mov %eax,%ecx
3c: 85 c9 test %ecx,%ecx
3e: 75 b3 jne 0xfffffff3
---
syzbot
Nov 8, 2023, 9:46:06 AM11/8/23
to air...@gmail.com, air...@linux.ie, christia...@amd.com, daniel...@ffwll.ch, daniel...@intel.com, dan...@ffwll.ch, dri-...@lists.freedesktop.org, hda...@sina.com, linaro-mm-...@lists.linaro.org, linaro...@lists.linaro.org, linux-...@vger.kernel.org, linux...@vger.kernel.org, maarten....@linux.intel.com, mri...@kernel.org, sumit....@linaro.org, syzkall...@googlegroups.com, tzimm...@suse.de
syzbot has bisected this issue to:
commit 45d9c8dde4cd8589f9180309ec60f0da2ce486e4
Author: Daniel Vetter <daniel...@ffwll.ch>
Date: Thu Aug 12 13:14:12 2021 +0000
drm/vgem: use shmem helpers
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=126094df680000
start commit: d2f51b3516da Merge tag 'rtc-6.7' of git://git.kernel.org/p..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=116094df680000
console output: https://syzkaller.appspot.com/x/log.txt?x=166094df680000
Fixes: 45d9c8dde4cd ("drm/vgem: use shmem helpers")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
commit 45d9c8dde4cd8589f9180309ec60f0da2ce486e4
Author: Daniel Vetter <daniel...@ffwll.ch>
Date: Thu Aug 12 13:14:12 2021 +0000
drm/vgem: use shmem helpers
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=126094df680000
start commit: d2f51b3516da Merge tag 'rtc-6.7' of git://git.kernel.org/p..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=116094df680000
console output: https://syzkaller.appspot.com/x/log.txt?x=166094df680000
kernel config: https://syzkaller.appspot.com/x/.config?x=1ffa1cec3b40f3ce
dashboard link: https://syzkaller.appspot.com/bug?extid=398e17b61dab22cc56bc
dashboard link: https://syzkaller.appspot.com/bug?extid=398e17b61dab22cc56bc
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16344918e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=156bb2c0e80000
Reported-by: syzbot+398e17...@syzkaller.appspotmail.com
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=156bb2c0e80000
Fixes: 45d9c8dde4cd ("drm/vgem: use shmem helpers")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
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