bisecting fixing commit since afc997898ece86b15214a5872f21a3011aa2b23d
building syzkaller on 44068e196185e2f5a7c94629b6245cdde008b140
testing commit afc997898ece86b15214a5872f21a3011aa2b23d
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 6698c30e4b3a56448c28387744e0aedc9e873c5515c2a3762fe563ed40b893d1
all runs: crashed: general protection fault in reweight_entity
testing current HEAD d605f2f30d54ba268170b3982f79c770b5a50329
testing commit d605f2f30d54ba268170b3982f79c770b5a50329
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 4543030342d130824b5840911a1fc1b76fc614747c5f4b2950dbefee1125c3e0
all runs: crashed: general protection fault in reweight_entity
revisions tested: 2, total time: 16m38.464510192s (build: 9m43.755942688s, test: 6m21.584935664s)
the crash still happens on HEAD
commit msg: Merge 5.10.91 into android12-5.10-lts
crash: general protection fault in reweight_entity
general protection fault, probably for non-canonical address 0xdffffc0000000014: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000a0-0x00000000000000a7]
CPU: 1 PID: 1961 Comm: syz-executor742 Not tainted 5.10.91-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:dequeue_load_avg kernel/sched/fair.c:3095 [inline]
RIP: 0010:reweight_entity+0x125/0x580 kernel/sched/fair.c:3114
Code: 80 3c 11 00 0f 85 3b 04 00 00 49 8d bc 24 a0 00 00 00 4c 8b b3 a0 01 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 e4 03 00 00 49 8b 94 24 a0 00 00 00 b9 00 00 00
RSP: 0018:ffffc900062a7cd8 EFLAGS: 00010006
RAX: 0000000000003c00 RBX: ffff888119c74e80 RCX: 0000000000000014
RDX: dffffc0000000000 RSI: ffff888119c74e80 RDI: 00000000000000a0
RBP: ffffc900062a7d18 R08: ffff888119d2a700 R09: ffff888119c74e78
R10: ffff888119c751f0 R11: 1ffff1102338e9cf R12: 0000000000000000
R13: ffff888119c74eb8 R14: 0000000000000400 R15: ffff888119c74e68
FS:  00007fb114908700(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb1149aba98 CR3: 000000010fcb0000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 reweight_task+0x9a/0x170 kernel/sched/fair.c:3139
 set_load_weight kernel/sched/core.c:902 [inline]
 set_user_nice+0x964/0x1450 kernel/sched/core.c:5255
 set_one_prio+0x1ad/0x220 kernel/sys.c:202
 __do_sys_setpriority+0x201/0x680 kernel/sys.c:243
 __se_sys_setpriority kernel/sys.c:207 [inline]
 __x64_sys_setpriority+0x6e/0xb0 kernel/sys.c:207
 do_syscall_64+0x32/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fb1149568b9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb114908318 EFLAGS: 00000246 ORIG_RAX: 000000000000008d
RAX: ffffffffffffffda RBX: 00007fb1149de3e8 RCX: 00007fb1149568b9
RDX: 0000000000008f82 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 00007fb1149de3e0 R08: 00007fb114908700 R09: 0000000000000000
R10: 00007fb114908700 R11: 0000000000000246 R12: 00007fb1149de3ec
R13: 00007ffd79afcabf R14: 00007fb114908400 R15: 0000000000022000
Modules linked in:
---[ end trace d6cf036f8bad9187 ]---
RIP: 0010:dequeue_load_avg kernel/sched/fair.c:3095 [inline]
RIP: 0010:reweight_entity+0x125/0x580 kernel/sched/fair.c:3114
Code: 80 3c 11 00 0f 85 3b 04 00 00 49 8d bc 24 a0 00 00 00 4c 8b b3 a0 01 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 e4 03 00 00 49 8b 94 24 a0 00 00 00 b9 00 00 00
RSP: 0018:ffffc900062a7cd8 EFLAGS: 00010006
RAX: 0000000000003c00 RBX: ffff888119c74e80 RCX: 0000000000000014
RDX: dffffc0000000000 RSI: ffff888119c74e80 RDI: 00000000000000a0
RBP: ffffc900062a7d18 R08: ffff888119d2a700 R09: ffff888119c74e78
R10: ffff888119c751f0 R11: 1ffff1102338e9cf R12: 0000000000000000
R13: ffff888119c74eb8 R14: 0000000000000400 R15: ffff888119c74e68
FS:  00007fb114908700(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb1149aba98 CR3: 000000010fcb0000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	80 3c 11 00          	cmpb   $0x0,(%rcx,%rdx,1)
   4:	0f 85 3b 04 00 00    	jne    0x445
   a:	49 8d bc 24 a0 00 00 	lea    0xa0(%r12),%rdi
  11:	00
  12:	4c 8b b3 a0 01 00 00 	mov    0x1a0(%rbx),%r14
  19:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  20:	fc ff df
  23:	48 89 f9             	mov    %rdi,%rcx
  26:	48 c1 e9 03          	shr    $0x3,%rcx
* 2a:	80 3c 11 00          	cmpb   $0x0,(%rcx,%rdx,1) <-- trapping instruction
  2e:	0f 85 e4 03 00 00    	jne    0x418
  34:	49 8b 94 24 a0 00 00 	mov    0xa0(%r12),%rdx
  3b:	00
  3c:	b9                   	.byte 0xb9
  3d:	00 00                	add    %al,(%rax)