Bug 4096 - bug: page fault in next_arg
Summary: bug: page fault in next_arg
Status: RESOLVED FIXED
Alias: None
Product: ANCK 4.19 Dev
Classification: ANCK
Component: general/others (show other bugs) general/others
Version: 4.19-028.x
Hardware: All Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: maqiao
QA Contact: shuming
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-02-17 10:51 UTC by niuyachen
Modified: 2023-02-28 19:38 UTC (History)
0 users

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Description niuyachen inspur_group 2023-02-17 10:51:56 UTC
Description of problem:

root@(none):/linus/fs/fat# insmod ./fat.ko  "foo=bar \""
[   33.870507] BUG: unable to handle page fault for address: ffff888204252608
[   33.872180] #PF: supervisor read access in kernel mode
[   33.873414] #PF: error_code(0x0000) - not-present page
[   33.874650] PGD 4401067 P4D 4401067 PUD 0
[   33.875321] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC PTI
[   33.876113] CPU: 16 PID: 399 Comm: insmod Not tainted 5.19.0-dbg-DEV #4
[   33.877193] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014
[   33.878739] RIP: 0010:next_arg+0xd1/0x110
[   33.879399] Code: 22 75 1d 41 c6 04 01 00 41 80 f8 22 74 18 eb 35 4c 89 0e 45 31 d2 4c 89 cf 48 c7 02 00 00 00 00 41 80 f8 22 75 1f 41 8d 42 ff <41> 80 3c 01 22 75 14 41 c6 04 01 00 eb 0d 48 c7 02 00 00 00 00 41
[   33.882338] RSP: 0018:ffffc90001253d08 EFLAGS: 00010246
[   33.883174] RAX: 00000000ffffffff RBX: ffff888104252608 RCX: 0fc317bba1c1dd00
[   33.884311] RDX: ffffc90001253d40 RSI: ffffc90001253d48 RDI: ffff888104252609
[   33.885450] RBP: ffffc90001253d10 R08: 0000000000000022 R09: ffff888104252609
[   33.886595] R10: 0000000000000000 R11: ffffffff82c7ff20 R12: 0000000000000282
[   33.887748] R13: 00000000ffff8000 R14: 0000000000000000 R15: 0000000000007fff
[   33.888887] FS:  00007f04ec7432c0(0000) GS:ffff88813d300000(0000) knlGS:0000000000000000
[   33.890183] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.891111] CR2: ffff888204252608 CR3: 0000000100f36005 CR4: 0000000000170ee0
[   33.892241] Call Trace:
[   33.892641]  <TASK>
[   33.892989]  parse_args+0x8f/0x220
[   33.893538]  load_module+0x138b/0x15a0
[   33.894149]  ? prepare_coming_module+0x50/0x50
[   33.894879]  ? kernel_read_file_from_fd+0x5f/0x90
[   33.895639]  __se_sys_finit_module+0xce/0x130
[   33.896342]  __x64_sys_finit_module+0x1d/0x20
[   33.897042]  do_syscall_64+0x44/0xa0
[   33.897622]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[   33.898434] RIP: 0033:0x7f04ec85ef79
[   33.899009] Code: 48 8d 3d da db 0d 00 0f 05 eb a5 66 0f 1f 44 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 8b 0d c7 9e 0d 00 f7 d8 64 89 01 48
[   33.901912] RSP: 002b:00007fffae81bfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[   33.903081] RAX: ffffffffffffffda RBX: 0000559c5f1d2640 RCX: 00007f04ec85ef79
[   33.904191] RDX: 0000000000000000 RSI: 0000559c5f1d12a0 RDI: 0000000000000003
[   33.905304] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   33.906421] R10: 0000000000000003 R11: 0000000000000246 R12: 0000559c5f1d12a0
[   33.907526] R13: 0000000000000000 R14: 0000559c5f1d25f0 R15: 0000559c5f1d12a0
[   33.908631]  </TASK>
[   33.908986] Modules linked in: fat(+) [last unloaded: fat]
[   33.909843] CR2: ffff888204252608
[   33.910375] ---[ end trace 0000000000000000 ]---
[   33.911172] RIP: 0010:next_arg+0xd1/0x110
[   33.911796] Code: 22 75 1d 41 c6 04 01 00 41 80 f8 22 74 18 eb 35 4c 89 0e 45 31 d2 4c 89 cf 48 c7 02 00 00 00 00 41 80 f8 22 75 1f 41 8d 42 ff <41> 80 3c 01 22 75 14 41 c6 04 01 00 eb 0d 48 c7 02 00 00 00 00 41
[   33.914643] RSP: 0018:ffffc90001253d08 EFLAGS: 00010246
[   33.915446] RAX: 00000000ffffffff RBX: ffff888104252608 RCX: 0fc317bba1c1dd00
[   33.916544] RDX: ffffc90001253d40 RSI: ffffc90001253d48 RDI: ffff888104252609
[   33.917636] RBP: ffffc90001253d10 R08: 0000000000000022 R09: ffff888104252609
[   33.918727] R10: 0000000000000000 R11: ffffffff82c7ff20 R12: 0000000000000282
[   33.919821] R13: 00000000ffff8000 R14: 0000000000000000 R15: 0000000000007fff
[   33.920908] FS:  00007f04ec7432c0(0000) GS:ffff88813d300000(0000) knlGS:0000000000000000
[   33.922125] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.923017] CR2: ffff888204252608 CR3: 0000000100f36005 CR4: 0000000000170ee0
[   33.924098] Kernel panic - not syncing: Fatal exception
[   33.925776] Kernel Offset: disabled
[   33.926347] Rebooting in 10 seconds..
Comment 1 maqiao alibaba_cloud_group 2023-02-28 19:38:28 UTC
merged: https://gitee.com/anolis/cloud-kernel/pulls/1205