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general protection fault in io_uring_setup

Status: closed as dup on 2021/01/15 04:44
Subsystems: fs io-uring
[Documentation on labels]
Reported-by: syzbot+06b7d55a62acca161485@syzkaller.appspotmail.com
First crash: 1425d, last: 1422d
Cause bisection: introduced by (bisect log) :
commit d9d05217cb6990b9a56e13b56e7a1b71e2551f6c
Author: Pavel Begunkov <asml.silence@gmail.com>
Date: Fri Jan 8 20:57:25 2021 +0000

  io_uring: stop SQPOLL submit on creator's death

Crash: BUG: unable to handle kernel NULL pointer dereference in io_disable_sqo_submit (log)
Repro: C syz .config
  
▶ ▼ Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
general protection fault in io_disable_sqo_submit fs io-uring C done 124 1422d 1426d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
general protection fault in io_uring_setup 2 (4) 2021/01/15 04:40
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2021/01/14 21:09 17m asml.silence@gmail.com git://git.kernel.dk/linux-block 06585c497b55045ec21aa8128e340f6a6587351c OK

Sample crash report:
Code: e8 cc ac 02 00 48 83 c4 18 c3 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 0f 83 3b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc6a96c958 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000441889
RDX: 0000000020ffd000 RSI: 0000000020000200 RDI: 0000000000003040
RBP: 000000000000d8dd R08: 0000000000000001 R09: 0000000020ffd000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020ffd000
R13: 0000000020ffb000 R14: 0000000000000000 R15: 0000000000000000
general protection fault, probably for non-canonical address 0xdffffc0000000022: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000110-0x0000000000000117]
CPU: 0 PID: 8444 Comm: syz-executor770 Not tainted 5.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:io_ring_set_wakeup_flag fs/io_uring.c:6929 [inline]
RIP: 0010:io_disable_sqo_submit fs/io_uring.c:8891 [inline]
RIP: 0010:io_uring_create fs/io_uring.c:9711 [inline]
RIP: 0010:io_uring_setup fs/io_uring.c:9739 [inline]
RIP: 0010:__do_sys_io_uring_setup fs/io_uring.c:9745 [inline]
RIP: 0010:__se_sys_io_uring_setup+0x2abb/0x37b0 fs/io_uring.c:9742
Code: c0 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 c5 31 de ff 41 be 14 01 00 00 4c 03 33 4c 89 f0 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 46 06 00 00 41 80 0e 01 48 8b 7c 24 30 e8
RSP: 0018:ffffc90000edfca0 EFLAGS: 00010007
RAX: 0000000000000022 RBX: ffff888021fe50c0 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc90000edfb80
RBP: ffffc90000edff38 R08: dffffc0000000000 R09: 0000000000000003
R10: fffff520001dbf71 R11: 0000000000000004 R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000114 R15: 00000000fffffff4
FS:  0000000000975940(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000204 CR3: 00000000222d6000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x441889
Code: e8 cc ac 02 00 48 83 c4 18 c3 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 0f 83 3b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc6a96c958 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000441889
RDX: 0000000020ffd000 RSI: 0000000020000200 RDI: 0000000000003040
RBP: 000000000000d8dd R08: 0000000000000001 R09: 0000000020ffd000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020ffd000
R13: 0000000020ffb000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace d873293344bf9303 ]---
RIP: 0010:io_ring_set_wakeup_flag fs/io_uring.c:6929 [inline]
RIP: 0010:io_disable_sqo_submit fs/io_uring.c:8891 [inline]
RIP: 0010:io_uring_create fs/io_uring.c:9711 [inline]
RIP: 0010:io_uring_setup fs/io_uring.c:9739 [inline]
RIP: 0010:__do_sys_io_uring_setup fs/io_uring.c:9745 [inline]
RIP: 0010:__se_sys_io_uring_setup+0x2abb/0x37b0 fs/io_uring.c:9742
Code: c0 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 c5 31 de ff 41 be 14 01 00 00 4c 03 33 4c 89 f0 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 46 06 00 00 41 80 0e 01 48 8b 7c 24 30 e8
RSP: 0018:ffffc90000edfca0 EFLAGS: 00010007
RAX: 0000000000000022 RBX: ffff888021fe50c0 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc90000edfb80
RBP: ffffc90000edff38 R08: dffffc0000000000 R09: 0000000000000003
R10: fffff520001dbf71 R11: 0000000000000004 R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000114 R15: 00000000fffffff4
FS:  0000000000975940(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000204 CR3: 00000000222d6000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (19):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/01/14 03:19 upstream 65f0d2414b70 269d24e8 .config console log report syz C ci-upstream-kasan-gce-smack-root
2021/01/16 20:04 upstream 1d94330a437a 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/16 18:56 upstream 1d94330a437a 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/16 18:45 upstream 1d94330a437a 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/16 10:57 upstream f4e087c666f5 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/16 05:15 upstream f4e087c666f5 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/15 22:07 upstream 5ee88057889b 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/15 19:43 upstream 5ee88057889b 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/15 16:13 upstream 5ee88057889b 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/15 16:08 upstream 5ee88057889b 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/15 15:59 upstream 5ee88057889b 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/15 13:26 upstream 5ee88057889b 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/15 04:30 upstream 65f0d2414b70 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/15 02:44 upstream 65f0d2414b70 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/14 22:20 upstream 65f0d2414b70 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/14 20:19 upstream 65f0d2414b70 65a7a854 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/14 13:46 upstream 65f0d2414b70 269d24e8 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/14 03:23 upstream 65f0d2414b70 269d24e8 .config console log report info ci-upstream-kasan-gce-smack-root
2021/01/14 03:05 upstream 65f0d2414b70 269d24e8 .config console log report info ci-upstream-kasan-gce-smack-root
* Struck through repros no longer work on HEAD.