BUG: unable to handle kernel NULL pointer dereference in __syscall_return_slowpath

Status: closed as dup on 2020/06/29 16:42
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+95910cea1a7ad8850a0f@syzkaller.appspotmail.com
First crash: 2216d, last: 2189d
▶ ▼ Duplicate of
Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported
general protection fault in syscall_return_slowpath kernel 2 syz inconclusive done 1 2243d 2329d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
BUG: unable to handle kernel NULL pointer dereference in __syscall_return_slowpath 1 (2) 2020/06/29 16:42

Sample crash report:
BUG: kernel NULL pointer dereference, address: 0000000000000286
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD a3001067 P4D a3001067 PUD 9265b067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6836 Comm: syz-executor220 Not tainted 5.8.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__syscall_return_slowpath+0x26/0x280 arch/x86/entry/common.c:339
Code: 0b 0f 1f 00 41 55 65 48 8b 04 25 00 ff 01 00 41 54 55 53 48 83 3d 19 60 b4 08 00 48 8b 18 74 3f 48 89 fd 9c 58 0f 1f 44 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 0018:ffffc900016a7f18 EFLAGS: 00010286
RAX: 0000000000000286 RBX: 0000000000000000 RCX: ffffffff81c2acc4
RDX: ffff888095b2e540 RSI: ffffffff81c2ad0f RDI: ffffc900016a7f58
RBP: ffffc900016a7f58 R08: 0000000000000001 R09: ffff888095b2ee08
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fc912a8b700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000286 CR3: 0000000090b85000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_syscall_64+0x6c/0xe0 arch/x86/entry/common.c:393
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x446ac9
Code: Bad RIP value.
RSP: 002b:00007fc912a8adb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffff7 RBX: 00000000006dbc28 RCX: 0000000000446ac9
RDX: 0000000020000580 RSI: 0000000000004b61 RDI: ffffffffffffffff
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c
R13: 00007ffcf9002a1f R14: 00007fc912a8b9c0 R15: 000000000000002d
Modules linked in:
CR2: 0000000000000286
---[ end trace 439ded3ebb8de856 ]---
RIP: 0010:__syscall_return_slowpath+0x26/0x280 arch/x86/entry/common.c:339
Code: 0b 0f 1f 00 41 55 65 48 8b 04 25 00 ff 01 00 41 54 55 53 48 83 3d 19 60 b4 08 00 48 8b 18 74 3f 48 89 fd 9c 58 0f 1f 44 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 0018:ffffc900016a7f18 EFLAGS: 00010286
RAX: 0000000000000286 RBX: 0000000000000000 RCX: ffffffff81c2acc4
RDX: ffff888095b2e540 RSI: ffffffff81c2ad0f RDI: ffffc900016a7f58
RBP: ffffc900016a7f58 R08: 0000000000000001 R09: ffff888095b2ee08
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fc912a8b700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000286 CR3: 0000000090b85000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (55):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/07/26 04:17 upstream 23ee3e4e5bd2 1f7cc1ca .config console log report syz C ci-upstream-kasan-gce-root
2020/07/09 10:35 upstream 0bddd227f3dc bc238812 .config console log report syz C ci-upstream-kasan-gce-selinux-root
2020/07/07 09:57 upstream 7cc2a8ea1048 51095195 .config console log report syz C ci-upstream-kasan-gce-root
2020/07/11 13:28 upstream a581387e415b 18d18b59 .config console log report syz ci-upstream-kasan-gce
2020/07/03 14:52 upstream cd77006e01b3 bed10395 .config console log report syz ci-upstream-kasan-gce
2020/06/29 10:47 upstream 4e99b32169e8 a2cdad9d .config console log report syz ci-upstream-kasan-gce-386
2020/07/26 22:43 upstream 04300d66f0a0 51265195 .config console log report ci-upstream-kasan-gce
2020/07/24 21:19 upstream f37e99aca03f 554af388 .config console log report ci-upstream-kasan-gce
2020/07/24 12:28 upstream f37e99aca03f 554af388 .config console log report ci-upstream-kasan-gce
2020/07/23 18:59 upstream d15be546031c 70c104a1 .config console log report ci-upstream-kasan-gce
2020/07/23 13:00 upstream d15be546031c 340ea530 .config console log report ci-upstream-kasan-gce
2020/07/22 23:43 upstream 8c26c87b0532 340ea530 .config console log report ci-upstream-kasan-gce
2020/07/21 17:34 upstream 4fa640dc5230 21f1765e .config console log report ci-upstream-kasan-gce-selinux-root
2020/07/21 10:16 upstream 4fa640dc5230 d88894e6 .config console log report ci-upstream-kasan-gce
2020/07/21 00:54 upstream 5714ee50bb43 4285ffa3 .config console log report ci-upstream-kasan-gce-root
2020/07/19 22:59 upstream f932d58abc38 9c812472 .config console log report ci-upstream-kasan-gce
2020/07/19 06:44 upstream f932d58abc38 9c812472 .config console log report ci-upstream-kasan-gce
2020/07/18 21:04 upstream 6a70f89cc58f 9c812472 .config console log report ci-upstream-kasan-gce
2020/07/17 22:44 upstream 8882572675c1 9c812472 .config console log report ci-upstream-kasan-gce
2020/07/14 19:42 upstream 0dc589da873b 609fb517 .config console log report ci-upstream-kasan-gce
2020/07/14 04:38 upstream 0dc589da873b ce4c95b3 .config console log report ci-upstream-kasan-gce
2020/07/11 15:40 upstream a581387e415b 18d18b59 .config console log report ci-upstream-kasan-gce-selinux-root
2020/07/10 23:18 upstream a581387e415b 18d18b59 .config console log report ci-upstream-kasan-gce-root
2020/07/08 20:20 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/08 20:08 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/08 18:38 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/08 06:51 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/08 05:14 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce-root
2020/07/08 02:01 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/07 23:27 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/07 23:18 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/07 21:59 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/07 18:27 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/07 13:16 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/07 12:55 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/07 10:43 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/07 08:30 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce-root
2020/07/07 06:33 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/07 05:20 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/07 04:48 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce
2020/07/06 16:24 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce-selinux-root
2020/07/06 12:18 upstream 7cc2a8ea1048 51095195 .config console log report ci-upstream-kasan-gce-selinux-root
2020/07/03 13:31 upstream cd77006e01b3 bed10395 .config console log report ci-upstream-kasan-gce
2020/07/03 12:15 upstream cd77006e01b3 bed10395 .config console log report ci-upstream-kasan-gce
2020/06/30 12:18 upstream 4e99b32169e8 a2cdad9d .config console log report ci-upstream-kasan-gce
2020/06/29 17:38 upstream 4e99b32169e8 a2cdad9d .config console log report ci-upstream-kasan-gce
2020/07/16 04:54 upstream e9919e11e219 f3bec699 .config console log report ci-upstream-kasan-gce-386
2020/06/29 10:19 upstream 4e99b32169e8 a2cdad9d .config console log report ci-upstream-kasan-gce-386
2020/07/19 19:05 linux-next 4c43049f19a2 9c812472 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/17 01:02 linux-next 4c43049f19a2 54b3c45e .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/10 09:26 linux-next b966b5cf7179 edf162e8 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/08 02:11 linux-next 9e50b94b3eb0 51095195 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/08 00:52 linux-next 9e50b94b3eb0 51095195 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/07 14:15 linux-next 9e50b94b3eb0 51095195 .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.