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BUG: unable to handle kernel paging request in do_mount

Status: fixed on 2019/05/20 19:44
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+73c7fe4f77776505299b@syzkaller.appspotmail.com
Fix commit: 3e1aeb00e6d1 vfs: Implement a filesystem superblock creation/configuration context
First crash: 2045d, last: 2007d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
BUG: unable to handle kernel paging request in do_mount 11 (19) 2019/05/20 16:22
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 BUG: unable to handle kernel paging request in do_mount vfs C 21 420d 711d 0/1 upstream: reported C repro on 2022/05/16 12:59

Sample crash report:
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440329
RDX: 0000000020000380 RSI: 00000000200002c0 RDI: 0000000000000000
RBP: 00000000006cb018 R08: 0000000000000000 R09: 0000000000000034
R10: 00000000001800a0 R11: 0000000000000246 R12: 0000000000000003
R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000
BUG: unable to handle kernel paging request at fffffffffffffff4
PGD 966d067 P4D 966d067 PUD 966f067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5551 Comm: syz-executor016 Not tainted 4.19.0-rc4-next-20180920+ #76
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:parse_monolithic_mount_data fs/namespace.c:2354 [inline]
RIP: 0010:do_remount fs/namespace.c:2387 [inline]
RIP: 0010:do_mount+0xb3b/0x1db0 fs/namespace.c:2950
Code: 06 00 48 89 c2 48 89 c3 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 24 11 00 00 48 b8 00 00 00 00 00 fc ff df <4c> 8b 33 49 8d 7e 18 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f8 10
RSP: 0018:ffff8801bb99fc28 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: 0000000000000000
RDX: 1ffffffffffffffe RSI: ffffffff81ddffac RDI: 0000000000000282
RBP: ffff8801bb99fdb0 R08: ffff8801d8b0e600 R09: ffffed003b5a5b57
R10: ffffed003b5a5b57 R11: ffff8801dad2dabb R12: ffff8801d3666830
R13: ffff8801c942cb80 R14: ffff8801c942cb80 R15: 0000000000000000
FS:  00000000010de880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff4 CR3: 00000001d84b5000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ksys_mount+0x12d/0x140 fs/namespace.c:3175
 __do_sys_mount fs/namespace.c:3189 [inline]
 __se_sys_mount fs/namespace.c:3186 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3186
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440329
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc6e4c9ec8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440329
RDX: 0000000020000380 RSI: 00000000200002c0 RDI: 0000000000000000
RBP: 00000000006cb018 R08: 0000000000000000 R09: 0000000000000034
R10: 00000000001800a0 R11: 0000000000000246 R12: 0000000000000003
R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
CR2: fffffffffffffff4
---[ end trace 8aa3e592ff591401 ]---
RIP: 0010:parse_monolithic_mount_data fs/namespace.c:2354 [inline]
RIP: 0010:do_remount fs/namespace.c:2387 [inline]
RIP: 0010:do_mount+0xb3b/0x1db0 fs/namespace.c:2950
Code: 06 00 48 89 c2 48 89 c3 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 24 11 00 00 48 b8 00 00 00 00 00 fc ff df <4c> 8b 33 49 8d 7e 18 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f8 10
RSP: 0018:ffff8801bb99fc28 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: 0000000000000000
RDX: 1ffffffffffffffe RSI: ffffffff81ddffac RDI: 0000000000000282
RBP: ffff8801bb99fdb0 R08: ffff8801d8b0e600 R09: ffffed003b5a5b57
R10: ffffed003b5a5b57 R11: ffff8801dad2dabb R12: ffff8801d3666830
R13: ffff8801c942cb80 R14: ffff8801c942cb80 R15: 0000000000000000
FS:  00000000010de880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff4 CR3: 00000001d84b5000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (194):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/09/21 04:59 linux-next a0cb0cabe4bb 6cee973c .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2018/10/29 04:04 linux-next 8c60c36d0b8c 9ca2afa1 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/28 20:39 linux-next 8c60c36d0b8c 6f9b225a .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/28 18:47 linux-next 8c60c36d0b8c 6f9b225a .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/28 14:05 linux-next 8c60c36d0b8c 6f9b225a .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/28 05:38 linux-next 8c60c36d0b8c 8efba39a .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/27 22:46 linux-next 8c60c36d0b8c 8efba39a .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/27 20:44 linux-next 8c60c36d0b8c 8efba39a .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/27 18:11 linux-next 8c60c36d0b8c 8efba39a .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/26 08:32 linux-next 8c60c36d0b8c a8292de9 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/25 05:30 linux-next 8c60c36d0b8c a8292de9 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/24 09:48 linux-next 8c60c36d0b8c a8292de9 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/23 16:05 linux-next 8c60c36d0b8c 24fa2ad8 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/23 10:13 linux-next 8c60c36d0b8c ecb386fe .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/22 08:45 linux-next 8c60c36d0b8c ecb386fe .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/21 12:48 linux-next 8c60c36d0b8c ecb386fe .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/20 23:50 linux-next 8c60c36d0b8c ecb386fe .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/20 04:41 linux-next 8c60c36d0b8c ecb386fe .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/19 23:40 linux-next 8c60c36d0b8c ecb386fe .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/19 13:28 linux-next 8c60c36d0b8c 9aba67b5 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/19 02:47 linux-next 9bab64345e83 9aba67b5 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/19 01:08 linux-next 9bab64345e83 9aba67b5 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/18 23:25 linux-next 9bab64345e83 9aba67b5 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/18 21:31 linux-next 9bab64345e83 9aba67b5 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/18 04:37 linux-next 4efacb725c0e b2695b95 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/17 22:57 linux-next 4efacb725c0e b2695b95 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/17 10:52 linux-next 4efacb725c0e 1ba7fd7e .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/17 09:38 linux-next 4efacb725c0e 1ba7fd7e .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/17 04:45 linux-next 6d5d82417dd6 1ba7fd7e .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/17 04:45 linux-next 6d5d82417dd6 1ba7fd7e .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/17 01:33 linux-next 6d5d82417dd6 1ba7fd7e .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/16 17:49 linux-next 6d5d82417dd6 1ba7fd7e .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/16 11:32 linux-next 6d5d82417dd6 8cd30605 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/16 09:50 linux-next 6d5d82417dd6 8cd30605 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/16 05:12 linux-next ca0591d03a2d 8cd30605 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/15 21:43 linux-next ca0591d03a2d 8cd30605 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/15 20:21 linux-next ca0591d03a2d 8cd30605 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/15 16:10 linux-next ca0591d03a2d caf12900 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/15 10:50 linux-next ca0591d03a2d caf12900 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/15 05:50 linux-next 774ea0551a29 caf12900 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/14 20:06 linux-next 774ea0551a29 caf12900 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/13 06:06 linux-next 774ea0551a29 caf12900 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/13 05:06 linux-next 774ea0551a29 caf12900 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/13 02:04 linux-next 774ea0551a29 caf12900 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/12 03:30 linux-next 771b65e89c8a ba6ddb43 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/12 02:12 linux-next 771b65e89c8a ba6ddb43 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/12 01:33 linux-next 771b65e89c8a ba6ddb43 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/11 20:02 linux-next 771b65e89c8a ba6ddb43 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/11 17:23 linux-next 771b65e89c8a 5f818b4b .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/11 12:55 linux-next 771b65e89c8a 5f818b4b .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/11 09:29 linux-next 771b65e89c8a 5f818b4b .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/11 08:13 linux-next 771b65e89c8a 5f818b4b .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.