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Date: Mon, 17 Jul 2023 15:56:02 +0300
From: Ilkka Prusi <ilkka.prusi@...il.com>
To: linux-kernel@...r.kernel.org
Subject: WARNING: at mm/gup.c:1101 __get_user_pages in 6.4.3
Hi,
I found the following splat in kernel log. It looks to be triggered
from Chromium-based browser but I'm unsure what exactly caused it.
Kernel is 6.4.3, (gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils
for Debian) 2.40) #160 SMP PREEMPT_DYNAMIC Tue Jul 11 14:19:41 EEST
2023
CPU is:
Model name: AMD Ryzen 7 5700X 8-Core Processor
CPU family: 25
Model: 33
[519077.338025] ------------[ cut here ]------------
[519077.338031] WARNING: CPU: 10 PID: 219607 at mm/gup.c:1101
__get_user_pages+0x539/0x610
[519077.338038] Modules linked in: uinput(E) snd_seq_dummy(E)
snd_hrtimer(E) snd_seq(E) binfmt_misc(E) nls_ascii(E) nls_cp850(E)
vfat(E) fat(E) amdgpu(E) intel_rapl_msr(E) intel_rapl_common(E)
iosf_mbi(E) snd_hda_codec_realtek(E) edac_mce_amd(E)
snd_hda_codec_generic(E) kvm_amd(E) ledtrig_audio(E) video(E)
snd_hda_codec_hdmi(E) kvm(E) gpu_sched(E) snd_hda_intel(E)
drm_buddy(E) drm_suballoc_helper(E) snd_intel_dspcfg(E)
drm_display_helper(E) irqbypass(E) snd_usb_audio(E) snd_hda_codec(E)
cec(E) drm_ttm_helper(E) crct10dif_pclmul(E) snd_usbmidi_lib(E)
snd_rawmidi(E) ttm(E) crc32_pclmul(E) snd_seq_device(E)
snd_hda_core(E) input_leds(E) mc(E) ghash_clmulni_intel(E)
drm_kms_helper(E) sha512_ssse3(E) joydev(E) snd_hwdep(E) snd_pcm(E)
sha512_generic(E) syscopyarea(E) snd_timer(E) aesni_intel(E) snd(E)
sysfillrect(E) k10temp(E) crypto_simd(E) sg(E) evdev(E) sysimgblt(E)
cryptd(E) soundcore(E) ccp(E) rng_core(E) tiny_power_button(E) rapl(E)
button(E) acpi_cpufreq(E) wmi_bmof(E) nfsd(E) auth_rpcgss(E)
nfs_acl(E) lockd(E) msr(E)
[519077.338078] grace(E) sunrpc(E) loop(E) fuse(E) configfs(E)
dm_mod(E) efi_pstore(E) dmi_sysfs(E) ip_tables(E) x_tables(E) ipv6(E)
autofs4(E) efivarfs(E) raid10(E) raid456(E) async_raid6_recov(E)
async_memcpy(E) async_pq(E) async_xor(E) xor(E) async_tx(E)
raid6_pq(E) libcrc32c(E) raid1(E) raid0(E) multipath(E) linear(E)
md_mod(E) hid_playstation(E) led_class_multicolor(E) ff_memless(E)
hid_generic(E) usbhid(E) hid(E) xhci_pci(E) xhci_hcd(E) sd_mod(E)
crc32c_intel(E) t10_pi(E) i2c_piix4(E) usbcore(E) igb(E)
i2c_algo_bit(E) usb_common(E) dca(E) crc64_rocksoft(E) crc64(E) wmi(E)
thermal(E)
[519077.338106] CPU: 10 PID: 219607 Comm: chrome_crashpad Tainted: G
E 6.4.3-stable #160
[519077.338109] Hardware name: Gigabyte Technology Co., Ltd. X570
AORUS ELITE/X570 AORUS ELITE, BIOS F37c 05/12/2022
[519077.338111] RIP: 0010:__get_user_pages+0x539/0x610
[519077.338114] Code: 8b 84 24 80 00 00 00 48 8d 04 d0 e9 da fd ff ff
48 89 d1 48 f7 d1 48 21 c1 f7 c1 81 01 00 00 0f 85 58 fe ff ff e9 64
ff ff ff <0f> 0b e9 2d fd ff ff f6 c3 04 0f 85 54 ff ff ff 49 8b 07 48
8b 0d
[519077.338116] RSP: 0018:ffffc90016e07cc0 EFLAGS: 00010202
[519077.338118] RAX: ffff888127e7ee70 RBX: 000000000005000a RCX:
00007fff907c8fff
[519077.338119] RDX: 00007fff907c9000 RSI: 00007fa5c180d000 RDI:
ffff888100c2bb68
[519077.338121] RBP: 0000000000000000 R08: 0000000000000000 R09:
0000000000000001
[519077.338122] R10: ffff8886974aa780 R11: 0000000000000000 R12:
ffff88813ac11100
[519077.338123] R13: ffffc90016e07dd8 R14: ffff888127e7ee70 R15:
000000000005000a
[519077.338124] FS: 00007f1eea313c80(0000) GS:ffff88881ea80000(0000)
knlGS:0000000000000000
[519077.338126] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[519077.338127] CR2: 00000ed00046c030 CR3: 00000001fd22a000 CR4:
0000000000350ee0
[519077.338129] Call Trace:
[519077.338130] <TASK>
[519077.338133] ? __warn+0x6b/0xd0
[519077.338136] ? __get_user_pages+0x539/0x610
[519077.338139] ? report_bug+0x144/0x190
[519077.338142] ? handle_bug+0x3c/0x60
[519077.338145] ? exc_invalid_op+0x13/0x60
[519077.338148] ? asm_exc_invalid_op+0x16/0x20
[519077.338152] ? __get_user_pages+0x539/0x610
[519077.338155] get_user_pages_remote+0xfd/0x340
[519077.338157] ? mas_replace+0x2c1/0x340
[519077.338160] __access_remote_vm+0x163/0x360
[519077.338162] mem_rw.isra.0+0x115/0x1d0
[519077.338166] vfs_read+0x95/0x2a0
[519077.338169] ? __fget_files+0x8a/0xc0
[519077.338171] ? lock_release+0x91/0x1a0
[519077.338174] ? lock_acquire.part.0.isra.0+0x47/0x80
[519077.338176] ? __fget_files+0xa2/0xc0
[519077.338178] __x64_sys_pread64+0x6e/0xb0
[519077.338181] do_syscall_64+0x3a/0x80
[519077.338183] entry_SYSCALL_64_after_hwframe+0x46/0xb0
[519077.338186] RIP: 0033:0x7f1ee9c361a7
[519077.338188] Code: 08 89 3c 24 48 89 4c 24 18 e8 b5 f4 f8 ff 4c 8b
54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 11 00 00
00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 05 f5 f8 ff
48 8b
[519077.338189] RSP: 002b:00007ffc7f5d4100 EFLAGS: 00000293 ORIG_RAX:
0000000000000011
[519077.338191] RAX: ffffffffffffffda RBX: 0000000000001000 RCX:
00007f1ee9c361a7
[519077.338192] RDX: 0000000000001000 RSI: 00007ffc7f5d43f0 RDI:
0000000000000007
[519077.338193] RBP: 00007ffc7f5d42a0 R08: 0000000000000000 R09:
000055b4e809ade0
[519077.338195] R10: 00007fa5c180c8a0 R11: 0000000000000293 R12:
00007fa5c180c8a0
[519077.338196] R13: 00000ed00022a100 R14: 00007ffc7f5d43f0 R15:
0000000000001000
[519077.338198] </TASK>
[519077.338199] ---[ end trace 0000000000000000 ]---
The code decodes:
$ scripts/decode_stacktrace.sh vmlinux < ~/warn_get_user_pages
[519077.338025] ------------[ cut here ]------------
[519077.338031] WARNING: CPU: 10 PID: 219607 at mm/gup.c:1101
__get_user_pages (mm/gup.c:1101 (discriminator 1))
[519077.338038] Modules linked in: uinput(E) snd_seq_dummy(E)
snd_hrtimer(E) snd_seq(E) binfmt_misc(E) nls_ascii(E) nls_cp850(E)
vfat(E) fat(E) amdgpu(E) intel_rapl_msr(E) intel_rapl_common(E)
iosf_mbi(E) snd_hda_codec_realtek(E) edac_mce_amd(E)
snd_hda_codec_generic(E) kvm_amd(E) ledtrig_audio(E) video(E)
snd_hda_codec_hdmi(E) kvm(E) gpu_sched(E) snd_hda_intel(E)
drm_buddy(E) drm_suballoc_helper(E) snd_intel_dspcfg(E)
drm_display_helper(E) irqbypass(E) snd_usb_audio(E) snd_hda_codec(E)
cec(E) drm_ttm_helper(E) crct10dif_pclmul(E) snd_usbmidi_lib(E)
snd_rawmidi(E) ttm(E) crc32_pclmul(E) snd_seq_device(E)
snd_hda_core(E) input_leds(E) mc(E) ghash_clmulni_intel(E)
drm_kms_helper(E) sha512_ssse3(E) joydev(E) snd_hwdep(E) snd_pcm(E)
sha512_generic(E) syscopyarea(E) snd_timer(E) aesni_intel(E) snd(E)
sysfillrect(E) k10temp(E) crypto_simd(E) sg(E) evdev(E) sysimgblt(E)
cryptd(E) soundcore(E) ccp(E) rng_core(E) tiny_power_button(E) rapl(E)
button(E) acpi_cpufreq(E) wmi_bmof(E) nfsd(E) auth_rpcgss(E)
nfs_acl(E) lockd(E) msr(E)
[519077.338078] grace(E) sunrpc(E) loop(E) fuse(E) configfs(E)
dm_mod(E) efi_pstore(E) dmi_sysfs(E) ip_tables(E) x_tables(E) ipv6(E)
autofs4(E) efivarfs(E) raid10(E) raid456(E) async_raid6_recov(E)
async_memcpy(E) async_pq(E) async_xor(E) xor(E) async_tx(E)
raid6_pq(E) libcrc32c(E) raid1(E) raid0(E) multipath(E) linear(E)
md_mod(E) hid_playstation(E) led_class_multicolor(E) ff_memless(E)
hid_generic(E) usbhid(E) hid(E) xhci_pci(E) xhci_hcd(E) sd_mod(E)
crc32c_intel(E) t10_pi(E) i2c_piix4(E) usbcore(E) igb(E)
i2c_algo_bit(E) usb_common(E) dca(E) crc64_rocksoft(E) crc64(E) wmi(E)
thermal(E)
[519077.338106] CPU: 10 PID: 219607 Comm: chrome_crashpad Tainted: G
E 6.4.3-stable #160
[519077.338109] Hardware name: Gigabyte Technology Co., Ltd. X570
AORUS ELITE/X570 AORUS ELITE, BIOS F37c 05/12/2022
[519077.338111] RIP: 0010:__get_user_pages (mm/gup.c:1101 (discriminator 1))
[519077.338114] Code: 8b 84 24 80 00 00 00 48 8d 04 d0 e9 da fd ff ff
48 89 d1 48 f7 d1 48 21 c1 f7 c1 81 01 00 00 0f 85 58 fe ff ff e9 64
ff ff ff <0f> 0b e9 2d fd ff ff f6 c3 04 0f 85 54 ff ff ff 49 8b 07 48
8b 0d
All code
========
0: 8b 84 24 80 00 00 00 mov 0x80(%rsp),%eax
7: 48 8d 04 d0 lea (%rax,%rdx,8),%rax
b: e9 da fd ff ff jmp 0xfffffffffffffdea
10: 48 89 d1 mov %rdx,%rcx
13: 48 f7 d1 not %rcx
16: 48 21 c1 and %rax,%rcx
19: f7 c1 81 01 00 00 test $0x181,%ecx
1f: 0f 85 58 fe ff ff jne 0xfffffffffffffe7d
25: e9 64 ff ff ff jmp 0xffffffffffffff8e
2a:* 0f 0b ud2 <-- trapping instruction
2c: e9 2d fd ff ff jmp 0xfffffffffffffd5e
31: f6 c3 04 test $0x4,%bl
34: 0f 85 54 ff ff ff jne 0xffffffffffffff8e
3a: 49 8b 07 mov (%r15),%rax
3d: 48 rex.W
3e: 8b .byte 0x8b
3f: 0d .byte 0xd
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: e9 2d fd ff ff jmp 0xfffffffffffffd34
7: f6 c3 04 test $0x4,%bl
a: 0f 85 54 ff ff ff jne 0xffffffffffffff64
10: 49 8b 07 mov (%r15),%rax
13: 48 rex.W
14: 8b .byte 0x8b
15: 0d .byte 0xd
[519077.338116] RSP: 0018:ffffc90016e07cc0 EFLAGS: 00010202
[519077.338118] RAX: ffff888127e7ee70 RBX: 000000000005000a RCX:
00007fff907c8fff
[519077.338119] RDX: 00007fff907c9000 RSI: 00007fa5c180d000 RDI:
ffff888100c2bb68
[519077.338121] RBP: 0000000000000000 R08: 0000000000000000 R09:
0000000000000001
[519077.338122] R10: ffff8886974aa780 R11: 0000000000000000 R12:
ffff88813ac11100
[519077.338123] R13: ffffc90016e07dd8 R14: ffff888127e7ee70 R15:
000000000005000a
[519077.338124] FS: 00007f1eea313c80(0000) GS:ffff88881ea80000(0000)
knlGS:0000000000000000
[519077.338126] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[519077.338127] CR2: 00000ed00046c030 CR3: 00000001fd22a000 CR4:
0000000000350ee0
[519077.338129] Call Trace:
[519077.338130] <TASK>
[519077.338133] ? __warn (kernel/panic.c:673)
[519077.338136] ? __get_user_pages (mm/gup.c:1101 (discriminator 1))
[519077.338139] ? report_bug (lib/bug.c:180 lib/bug.c:219)
[519077.338142] ? handle_bug (arch/x86/kernel/traps.c:324)
[519077.338145] ? exc_invalid_op (arch/x86/kernel/traps.c:345 (discriminator 1))
[519077.338148] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568)
[519077.338152] ? __get_user_pages (mm/gup.c:1101 (discriminator 1))
[519077.338155] get_user_pages_remote (mm/gup.c:1391 mm/gup.c:2238)
[519077.338157] ? mas_replace (lib/maple_tree.c:963
lib/maple_tree.c:1461 lib/maple_tree.c:1743 lib/maple_tree.c:1775)
[519077.338160] __access_remote_vm (mm/memory.c:5739)
[519077.338162] mem_rw.isra.0 (fs/proc/base.c:867)
[519077.338166] vfs_read (fs/read_write.c:468)
[519077.338169] ? __fget_files (./include/linux/rcupdate.h:805 fs/file.c:915)
[519077.338171] ? lock_release (kernel/locking/lockdep.c:5381
kernel/locking/lockdep.c:5725)
[519077.338174] ? lock_acquire.part.0.isra.0
(kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5707)
[519077.338176] ? __fget_files (fs/file.c:918)
[519077.338178] __x64_sys_pread64 (./include/linux/file.h:44
fs/read_write.c:666 fs/read_write.c:675 fs/read_write.c:672
fs/read_write.c:672)
[519077.338181] do_syscall_64 (arch/x86/entry/common.c:50
arch/x86/entry/common.c:80)
[519077.338183] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)
[519077.338186] RIP: 0033:0x7f1ee9c361a7
[519077.338188] Code: 08 89 3c 24 48 89 4c 24 18 e8 b5 f4 f8 ff 4c 8b
54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 11 00 00
00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 05 f5 f8 ff
48 8b
All code
========
0: 08 89 3c 24 48 89 or %cl,-0x76b7dbc4(%rcx)
6: 4c 24 18 rex.WR and $0x18,%al
9: e8 b5 f4 f8 ff call 0xfffffffffff8f4c3
e: 4c 8b 54 24 18 mov 0x18(%rsp),%r10
13: 48 8b 54 24 10 mov 0x10(%rsp),%rdx
18: 41 89 c0 mov %eax,%r8d
1b: 48 8b 74 24 08 mov 0x8(%rsp),%rsi
20: 8b 3c 24 mov (%rsp),%edi
23: b8 11 00 00 00 mov $0x11,%eax
28: 0f 05 syscall
2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax
<-- trapping instruction
30: 77 31 ja 0x63
32: 44 89 c7 mov %r8d,%edi
35: 48 89 04 24 mov %rax,(%rsp)
39: e8 05 f5 f8 ff call 0xfffffffffff8f543
3e: 48 rex.W
3f: 8b .byte 0x8b
Code starting with the faulting instruction
===========================================
0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax
6: 77 31 ja 0x39
8: 44 89 c7 mov %r8d,%edi
b: 48 89 04 24 mov %rax,(%rsp)
f: e8 05 f5 f8 ff call 0xfffffffffff8f519
14: 48 rex.W
15: 8b .byte 0x8b
[519077.338189] RSP: 002b:00007ffc7f5d4100 EFLAGS: 00000293 ORIG_RAX:
0000000000000011
[519077.338191] RAX: ffffffffffffffda RBX: 0000000000001000 RCX:
00007f1ee9c361a7
[519077.338192] RDX: 0000000000001000 RSI: 00007ffc7f5d43f0 RDI:
0000000000000007
[519077.338193] RBP: 00007ffc7f5d42a0 R08: 0000000000000000 R09:
000055b4e809ade0
[519077.338195] R10: 00007fa5c180c8a0 R11: 0000000000000293 R12:
00007fa5c180c8a0
[519077.338196] R13: 00000ed00022a100 R14: 00007ffc7f5d43f0 R15:
0000000000001000
[519077.338198] </TASK>
[519077.338199] ---[ end trace 0000000000000000 ]---
--
/**
- Ilkka Prusi
- ilkka.prusi@...il.com
*/
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