Re: [PATCH v2 22/44] mmap: Pass through vmi iterator to __split_vma()

From: SeongJae Park
Date: Fri Jan 06 2023 - 21:45:21 EST

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Hello Liam,

On Sat, 7 Jan 2023 02:01:26 +0000 SeongJae Park <sj@xxxxxxxxxx> wrote:

> Hello Liam,
>
>
> I found 'make install' mm-unstable kernel fails from initramfs stage with
> 'not a dynamic executable' message. I confirmed the issue is not reproducible
> before your patchset[1] but after the series[2].
>
> I tried to bisect, but on a commit[3] middle of mm-unstable tree which this
> patch is applied, I get below error while booting. Do you have an idea?

I further bisected for the boot failure. The first bad commit was a8e0f2e12936
("mmap: change do_mas_munmap and do_mas_aligned_munmap() to use vma
iterator")[1]. The stacktrace on the commit is as below.

[ 2.125001] BUG: kernel NULL pointer dereference, address: 0000000000000078
[ 2.128035] #PF: supervisor read access in kernel mode
[ 2.128035] #PF: error_code(0x0000) - not-present page
[ 2.128035] PGD 0 P4D 0
[ 2.128035] Oops: 0000 [#1] PREEMPT SMP PTI
[ 2.128035] CPU: 27 PID: 238 Comm: modprobe Not tainted 6.2.0-rc1+ #24
[ 2.128035] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-pr4
[ 2.128035] RIP: 0010:mas_wr_walk (lib/maple_tree.c:1401 lib/maple_tree.c:2259 lib/maple_tree.c:3732 lib/maple_tree.c:3757)
[ 2.128035] Code: 00 48 8b 51 18 30 d2 48 89 53 08 83 f8 02 0f 87 64 01 00 00 4c 8d 42 08 0f b6 80 e68

Code starting with the faulting instruction
===========================================
0: 00 48 8b add %cl,-0x75(%rax)
3: 51 push %rcx
4: 18 30 sbb %dh,(%rax)
6: d2 48 89 rorb %cl,-0x77(%rax)
9: 53 push %rbx
a: 08 83 f8 02 0f 87 or %al,-0x78f0fd08(%rbx)
10: 64 01 00 add %eax,%fs:(%rax)
13: 00 4c 8d 42 add %cl,0x42(%rbp,%rcx,4)
17: 08 0f or %cl,(%rdi)
19: b6 80 mov $0x80,%dh
1b: 68 .byte 0x68
[ 2.128035] RSP: 0018:ffffba49c11b3c28 EFLAGS: 00010246
[ 2.128035] RAX: 000000000000000f RBX: ffffba49c11b3c78 RCX: ffffba49c11b3d60
[ 2.128035] RDX: 0000000000000000 RSI: 000000000000000e RDI: 000000000000000e
[ 2.128035] RBP: ffffba49c11b3c38 R08: 0000000000000008 R09: 0000000000000001
[ 2.128035] R10: ffff8fe4ca713500 R11: ffff8fe4ca713f48 R12: ffffba49c11b3d60
[ 2.128035] R13: ffff8fe4ca6f2140 R14: ffff8fe4ca711988 R15: 0000000000100073
[ 2.128035] FS: 0000000000000000(0000) GS:ffff9002fdac0000(0000) knlGS:0000000000000000
[ 2.128035] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2.128035] CR2: 0000000000000078 CR3: 000000010a6d6000 CR4: 00000000000006e0
[ 2.128035] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 2.128035] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 2.128035] Call Trace:
[ 2.128035] <TASK>
[ 2.128035] mas_wr_store_entry (lib/maple_tree.c:4382)
[ 2.128035] mas_store_prealloc (lib/maple_tree.c:249 lib/maple_tree.c:5706)
[ 2.128035] mmap_region (mm/mmap.c:2765)
[ 2.128035] do_mmap (mm/mmap.c:1488)
[ 2.128035] ? security_mmap_file (security/security.c:1670)
[ 2.128035] vm_mmap_pgoff (mm/util.c:542)
[ 2.128035] ksys_mmap_pgoff (mm/mmap.c:1534)
[ 2.128035] __x64_sys_mmap (arch/x86/kernel/sys_x86_64.c:86)
[ 2.128035] do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
[ 2.128035] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)
[ 2.128035] RIP: 0033:0x7fea50d24186
[ 2.128035] Code: 1f 44 00 00 f3 0f 1e fa 41 f7 c1 ff 0f 00 00 75 2b 55 48 89 fd 53 89 cb 48 85 ff 74f

Code starting with the faulting instruction
===========================================
0: 1f (bad)
1: 44 00 00 add %r8b,(%rax)
4: f3 0f 1e fa endbr64
8: 41 f7 c1 ff 0f 00 00 test $0xfff,%r9d
f: 75 2b jne 0x3c
11: 55 push %rbp
12: 48 89 fd mov %rdi,%rbp
15: 53 push %rbx
16: 89 cb mov %ecx,%ebx
18: 48 85 ff test %rdi,%rdi
1b: 4f rex.WRXB
[ 2.128035] RSP: 002b:00007ffee1f7b1f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
[ 2.128035] RAX: ffffffffffffffda RBX: 0000000000000022 RCX: 00007fea50d24186
[ 2.176096] ata2: found unknown device (class 0)
[ 2.128035] RDX: 0000000000000003 RSI: 0000000000002000 RDI: 0000000000000000
[ 2.128035] RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000
[ 2.181946] ata2.00: ATAPI: QEMU DVD-ROM, 2.5+, max UDMA/100
[ 2.128035] R10: 0000000000000022 R11: 0000000000000246 R12: 00007fea50d34190
[ 2.128035] R13: 000000000000000c R14: 00007fea50d33060 R15: 0000000000000000
[ 2.188623] scsi 1:0:0:0: CD-ROM QEMU QEMU DVD-ROM 2.5+ PQ: 0 ANSI: 5
[ 2.128035] </TASK>
[ 2.128035] Modules linked in:
[ 2.128035] Dumping ftrace buffer:
[ 2.128035] (ftrace buffer empty)
[ 2.128035] CR2: 0000000000000078
[ 2.196913] ---[ end trace 0000000000000000 ]---
[ 2.197932] RIP: 0010:mas_wr_walk (lib/maple_tree.c:1401 lib/maple_tree.c:2259 lib/maple_tree.c:3732 lib/maple_tree.c:3757)
[ 2.198869] Code: 00 48 8b 51 18 30 d2 48 89 53 08 83 f8 02 0f 87 64 01 00 00 4c 8d 42 08 0f b6 80 e68

Code starting with the faulting instruction
===========================================
0: 00 48 8b add %cl,-0x75(%rax)
3: 51 push %rcx
4: 18 30 sbb %dh,(%rax)
6: d2 48 89 rorb %cl,-0x77(%rax)
9: 53 push %rbx
a: 08 83 f8 02 0f 87 or %al,-0x78f0fd08(%rbx)
10: 64 01 00 add %eax,%fs:(%rax)
13: 00 4c 8d 42 add %cl,0x42(%rbp,%rcx,4)
17: 08 0f or %cl,(%rdi)
19: b6 80 mov $0x80,%dh
1b: 68 .byte 0x68
[ 2.202922] RSP: 0018:ffffba49c11b3c28 EFLAGS: 00010246
[ 2.204060] RAX: 000000000000000f RBX: ffffba49c11b3c78 RCX: ffffba49c11b3d60
[ 2.205608] RDX: 0000000000000000 RSI: 000000000000000e RDI: 000000000000000e
[ 2.207143] RBP: ffffba49c11b3c38 R08: 0000000000000008 R09: 0000000000000001
[ 2.208703] R10: ffff8fe4ca713500 R11: ffff8fe4ca713f48 R12: ffffba49c11b3d60
[ 2.210239] R13: ffff8fe4ca6f2140 R14: ffff8fe4ca711988 R15: 0000000000100073
[ 2.211781] FS: 0000000000000000(0000) GS:ffff9002fdac0000(0000) knlGS:0000000000000000
[ 2.213520] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2.214756] CR2: 0000000000000078 CR3: 000000010a6d6000 CR4: 00000000000006e0
[ 2.216316] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[1] https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?h=mm-unstable&id=a8e0f2e12936b08e4abde7c867503177def79d12

Thanks,
SJ

>
> [ 2.118502] BUG: kernel NULL pointer dereference, address: 0000000000000078
> [ 2.121516] #PF: supervisor read access in kernel mode
> [ 2.121576] #PF: error_code(0x0000) - not-present page
> [ 2.121576] PGD 0 P4D 0
> [ 2.121576] Oops: 0000 [#1] PREEMPT SMP PTI
> [ 2.121576] CPU: 2 PID: 237 Comm: modprobe Not tainted 6.2.0-rc1+ #18
> [ 2.121576] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-pr4
> [ 2.121576] RIP: 0010:mas_wr_walk (lib/maple_tree.c:1401 lib/maple_tree.c:2259 lib/maple_tree.c:3732 lib/maple_tree.c:3757)
> [ 2.121576] Code: 00 48 8b 51 18 30 d2 48 89 53 08 83 f8 02 0f 87 64 01 00 00 4c 8d 42 08 0f b6 80 e68
>
> Code starting with the faulting instruction
> ===========================================
> 0: 00 48 8b add %cl,-0x75(%rax)
> 3: 51 push %rcx
> 4: 18 30 sbb %dh,(%rax)
> 6: d2 48 89 rorb %cl,-0x77(%rax)
> 9: 53 push %rbx
> a: 08 83 f8 02 0f 87 or %al,-0x78f0fd08(%rbx)
> 10: 64 01 00 add %eax,%fs:(%rax)
> 13: 00 4c 8d 42 add %cl,0x42(%rbp,%rcx,4)
> 17: 08 0f or %cl,(%rdi)
> 19: b6 80 mov $0x80,%dh
> 1b: 68 .byte 0x68
> [ 2.121576] RSP: 0018:ffffa5190119fc28 EFLAGS: 00010246
> [ 2.121576] RAX: 000000000000000f RBX: ffffa5190119fc78 RCX: ffffa5190119fd60
> [ 2.121576] RDX: 0000000000000000 RSI: 000000000000000e RDI: 000000000000000e
> [ 2.121576] RBP: ffffa5190119fc38 R08: 0000000000000008 R09: 0000000000000001
> [ 2.121576] R10: ffff95f5c3435300 R11: ffff95f5c3434c48 R12: ffffa5190119fd60
> [ 2.121576] R13: ffff95f5c9a26880 R14: ffff95f5c3433690 R15: 0000000000100073
> [ 2.121576] FS: 0000000000000000(0000) GS:ffff9613fd480000(0000) knlGS:0000000000000000
> [ 2.121576] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 2.121576] CR2: 0000000000000078 CR3: 0000000103430000 CR4: 00000000000006e0
> [ 2.121576] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 2.121576] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [ 2.121576] Call Trace:
> [ 2.121576] <TASK>
> [ 2.121576] mas_wr_store_entry (lib/maple_tree.c:4382)
> [ 2.121576] mas_store_prealloc (lib/maple_tree.c:249 lib/maple_tree.c:5706)
> [ 2.121576] mmap_region (mm/mmap.c:2808)
> [ 2.121576] do_mmap (mm/mmap.c:1506)
> [ 2.121576] ? security_mmap_file (security/security.c:1670)
> [ 2.121576] vm_mmap_pgoff (mm/util.c:542)
> [ 2.121576] ksys_mmap_pgoff (mm/mmap.c:1552)
> [ 2.121576] __x64_sys_mmap (arch/x86/kernel/sys_x86_64.c:86)
> [ 2.121576] do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
> [ 2.121576] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)
> [ 2.121576] RIP: 0033:0x7ff228f7a186
> [ 2.121576] Code: 1f 44 00 00 f3 0f 1e fa 41 f7 c1 ff 0f 00 00 75 2b 55 48 89 fd 53 89 cb 48 85 ff 74f
>
> Code starting with the faulting instruction
> ===========================================
> 0: 1f (bad)
> 1: 44 00 00 add %r8b,(%rax)
> 4: f3 0f 1e fa endbr64
> 8: 41 f7 c1 ff 0f 00 00 test $0xfff,%r9d
> f: 75 2b jne 0x3c
> 11: 55 push %rbp
> 12: 48 89 fd mov %rdi,%rbp
> 15: 53 push %rbx
> 16: 89 cb mov %ecx,%ebx
> 18: 48 85 ff test %rdi,%rdi
> 1b: 4f rex.WRXB
> [ 2.121576] RSP: 002b:00007ffcbc695148 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
> [ 2.121576] RAX: ffffffffffffffda RBX: 0000000000000022 RCX: 00007ff228f7a186
> [ 2.121576] RDX: 0000000000000003 RSI: 0000000000002000 RDI: 0000000000000000
> [ 2.121576] RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000
> [ 2.121576] R10: 0000000000000022 R11: 0000000000000246 R12: 00007ff228f8a190
> [ 2.121576] R13: 000000000000000c R14: 00007ff228f89060 R15: 0000000000000000
> [ 2.121576] </TASK>
> [ 2.174098] ata2: found unknown device (class 0)
> [ 2.121576] Modules linked in:
> [ 2.121576] Dumping ftrace buffer:
> [ 2.121576] (ftrace buffer empty)
> [ 2.121576] CR2: 0000000000000078
> [ 2.179450] ata2.00: ATAPI: QEMU DVD-ROM, 2.5+, max UDMA/100
> [ 2.179774] ---[ end trace 0000000000000000 ]---
> [ 2.183410] RIP: 0010:mas_wr_walk (lib/maple_tree.c:1401 lib/maple_tree.c:2259 lib/maple_tree.c:3732 lib/maple_tree.c:3757)
> [ 2.184545] Code: 00 48 8b 51 18 30 d2 48 89 53 08 83 f8 02 0f 87 64 01 00 00 4c 8d 42 08 0f b6 80 e68
>
> Code starting with the faulting instruction
> ===========================================
> 0: 00 48 8b add %cl,-0x75(%rax)
> 3: 51 push %rcx
> 4: 18 30 sbb %dh,(%rax)
> 6: d2 48 89 rorb %cl,-0x77(%rax)
> 9: 53 push %rbx
> a: 08 83 f8 02 0f 87 or %al,-0x78f0fd08(%rbx)
> 10: 64 01 00 add %eax,%fs:(%rax)
> 13: 00 4c 8d 42 add %cl,0x42(%rbp,%rcx,4)
> 17: 08 0f or %cl,(%rdi)
> 19: b6 80 mov $0x80,%dh
> 1b: 68 .byte 0x68
> [ 2.185835] scsi 1:0:0:0: CD-ROM QEMU QEMU DVD-ROM 2.5+ PQ: 0 ANSI: 5
> [ 2.188543] RSP: 0018:ffffa5190119fc28 EFLAGS: 00010246
> [ 2.188546] RAX: 000000000000000f RBX: ffffa5190119fc78 RCX: ffffa5190119fd60
> [ 2.188547] RDX: 0000000000000000 RSI: 000000000000000e RDI: 000000000000000e
> [ 2.188548] RBP: ffffa5190119fc38 R08: 0000000000000008 R09: 0000000000000001
> [ 2.188550] R10: ffff95f5c3435300 R11: ffff95f5c3434c48 R12: ffffa5190119fd60
> [ 2.188551] R13: ffff95f5c9a26880 R14: ffff95f5c3433690 R15: 0000000000100073
> [ 2.188552] FS: 0000000000000000(0000) GS:ffff9613fd480000(0000) knlGS:0000000000000000
> [ 2.188554] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 2.188556] CR2: 0000000000000078 CR3: 0000000103430000 CR4: 00000000000006e0
> [ 2.188559] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 2.206738] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?h=mm-unstable&id=a13d6f0ec9b80674195d74ddfb6dfd94d352d2bb
> [2] https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?h=mm-unstable&id=1329c351b42e20fcd195829357f0eda607f3de09
> [3] https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?h=mm-unstable&id=f569105c34815dee1751a00bc9ca5154cc96dd6a
>
>
> Thanks,
> SJ
>

Next message: Baolu Lu: "Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled"
Previous message: Miaohe Lin: "Re: [PATCH] mce: fix missing stack-dumping in mce_panic()"
In reply to: SeongJae Park: "Re: [PATCH v2 22/44] mmap: Pass through vmi iterator to __split_vma()"
Next in thread: Liam Howlett: "[PATCH v2 29/44] madvise: Use split_vma() instead of __split_vma()"
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