syzbot


general protection fault in rds_ib_get_mr

Status: upstream: reported C repro on 2022/01/06 02:37
Reported-by: syzbot+d50512f5e936db36ad18@syzkaller.appspotmail.com
First crash: 836d, last: 534d
Fix bisection: failed (error log, bisect log)
  
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in rds_ib_get_mr rds C 9 2123d 2222d 8/26 fixed on 2018/08/08 18:10
Fix bisection attempts (6)
Created Duration User Patch Repo Result
2022/10/13 02:20 0m bisect fix linux-4.14.y error job log (0)
2022/08/13 15:19 23m bisect fix linux-4.14.y job log (0) log
2022/05/17 08:11 24m bisect fix linux-4.14.y job log (0) log
2022/04/11 16:12 30m bisect fix linux-4.14.y job log (0) log
2022/03/09 15:23 28m bisect fix linux-4.14.y job log (0) log
2022/02/05 02:51 26m bisect fix linux-4.14.y job log (0) log

Sample crash report:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 13725 Comm: syz-executor369 Not tainted 4.14.291-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
task: ffff8880a9a1c0c0 task.stack: ffff88809bc80000
RIP: 0010:rds_ib_get_mr+0x58/0x200 net/rds/ib_rdma.c:543
RSP: 0018:ffff88809bc87b98 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88809bc87c68 RCX: ffff8880a987b09c
RDX: 000000000000000d RSI: 0000000000000001 RDI: 0000000000000068
RBP: ffff8880982aa440 R08: 0000000000000001 R09: ffff8880b4fa1580
R10: ffff8880b4fa15a7 R11: 0000000000000000 R12: ffff8880b4fa1580
R13: 0000000000000001 R14: ffff8880a987b09c R15: 0000000000000000
FS:  00007f4ec4598700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd22f789b0 CR3: 00000000a9165000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __rds_rdma_map+0x5ab/0xea0 net/rds/rdma.c:271
 rds_get_mr_for_dest+0xe3/0x130 net/rds/rdma.c:357
 rds_setsockopt+0x337/0x750 net/rds/af_rds.c:347
 SYSC_setsockopt net/socket.c:1865 [inline]
 SyS_setsockopt+0x110/0x1e0 net/socket.c:1844
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f4ec4608529
RSP: 002b:00007f4ec4598208 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f4ec46914b8 RCX: 00007f4ec4608529
RDX: 0000000000000007 RSI: 0000000000000114 RDI: 0000000000000003
RBP: 00007f4ec46914b0 R08: 00000000000000a0 R09: 00007f4ec46914b8
R10: 0000000020000180 R11: 0000000000000246 R12: 00007f4ec46914bc
R13: 00007ffd22f2cd0f R14: 00007f4ec4598300 R15: 0000000000022000
Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 9e 01 00 00 4c 8b bd c0 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7f 68 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 6e 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 
RIP: rds_ib_get_mr+0x58/0x200 net/rds/ib_rdma.c:543 RSP: ffff88809bc87b98
---[ end trace ae1d663dd54e968e ]---
----------------
Code disassembly (best guess):
   0:	fa                   	cli
   1:	48 c1 ea 03          	shr    $0x3,%rdx
   5:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   9:	0f 85 9e 01 00 00    	jne    0x1ad
   f:	4c 8b bd c0 04 00 00 	mov    0x4c0(%rbp),%r15
  16:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1d:	fc ff df
  20:	49 8d 7f 68          	lea    0x68(%r15),%rdi
  24:	48 89 fa             	mov    %rdi,%rdx
  27:	48 c1 ea 03          	shr    $0x3,%rdx
* 2b:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2f:	0f 85 6e 01 00 00    	jne    0x1a3
  35:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  3c:	fc ff df
  3f:	4d                   	rex.WRB

Crashes (17):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/09/04 14:06 linux-4.14.y e548869f356f 28811d0a .config console log report syz C [disk image] [vmlinux] ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/05/19 00:18 linux-4.14.y dffb5c6ff09c 50c53f39 .config console log report syz C ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/02/07 07:16 linux-4.14.y b86ee2b7ae42 a7dab638 .config console log report syz C ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/01/06 02:51 linux-4.14.y bfdef05c8da4 6acc789a .config console log report syz C ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/11/03 18:20 linux-4.14.y a85772d7ba90 7a2ebf95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/09/07 17:25 linux-4.14.y 65640c873dcf c5b7bc57 .config console log report info [disk image] [vmlinux] ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/09/04 13:49 linux-4.14.y e548869f356f 28811d0a .config console log report info [disk image] [vmlinux] ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/08/21 07:08 linux-4.14.y b641242202ed 26a13b38 .config console log report info ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/07/14 15:19 linux-4.14.y 424a46ea058e 5d921b08 .config console log report info ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/07/09 21:01 linux-4.14.y 1048779a1d7d b5765a15 .config console log report info ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/06/11 01:44 linux-4.14.y b8f3be299d51 0d5abf15 .config console log report info ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/06/05 06:46 linux-4.14.y 501eec4f9e13 c8857892 .config console log report info ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/05/19 00:02 linux-4.14.y dffb5c6ff09c 50c53f39 .config console log report info ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/04/17 07:40 linux-4.14.y 74766a973637 8bcc32a6 .config console log report info ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/03/12 07:06 linux-4.14.y af48f51cb593 9e8eaa75 .config console log report info ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/03/10 10:38 linux-4.14.y c9fcc1545c3b 9e8eaa75 .config console log report info ci2-linux-4-14 general protection fault in rds_ib_get_mr
2022/01/06 02:36 linux-4.14.y bfdef05c8da4 6acc789a .config console log report info ci2-linux-4-14 general protection fault in rds_ib_get_mr
* Struck through repros no longer work on HEAD.