syzbot


general protection fault in __cpu_map_flush

Status: fixed on 2024/08/23 02:59
Subsystems: bpf net
[Documentation on labels]
Reported-by: syzbot+c226757eb784a9da3e8b@syzkaller.appspotmail.com
Fix commit: 9da49aa80d68 tun: Add missing bpf_net_ctx_clear() in do_xdp_generic()
First crash: 157d, last: 134d
Cause bisection: the cause commit could be any of (bisect log):
  3b2aef99221d net: ethernet: mediatek: Allow gaps in MAC allocation
  fecef4cd42c6 tun: Assign missing bpf_net_context.
  
Discussions (2)
Title Replies (including bot) Last reply
[PATCH net] tun: Add missing bpf_net_ctx_clear() in do_xdp_generic() 7 (7) 2024/07/29 10:08
[syzbot] [bpf?] [net?] general protection fault in __cpu_map_flush 1 (3) 2024/07/24 14:43

Sample crash report:
Oops: general protection fault, probably for non-canonical address 0xe3fffa2202e4cfad: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: maybe wild-memory-access in range [0x1ffff11017267d68-0x1ffff11017267d6f]
CPU: 0 UID: 0 PID: 5229 Comm: syz-executor379 Not tainted 6.10.0-next-20240726-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__cpu_map_flush+0x42/0xd0
Code: e8 13 8c d6 ff 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 8d 10 3e 00 49 8b 1e 4c 39 f3 74 77 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 6f 10 3e 00 4c 8b 23 48 8d 7b c0
RSP: 0018:ffffc90000007b10 EFLAGS: 00010202
RAX: 03fffe2202e4cfad RBX: 1ffff11017267d6b RCX: ffff888026d15a00
RDX: 0000000080000102 RSI: 0000000000000000 RDI: ffffc900035a7800
RBP: dffffc0000000000 R08: ffffffff8992342a R09: 1ffffffff202fc75
R10: dffffc0000000000 R11: fffffbfff202fc76 R12: ffffc900035a7800
R13: ffffc900035a77c0 R14: ffffc900035a7800 R15: dffffc0000000000
FS:  00005555697ee380(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 0000000076e4c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 xdp_do_check_flushed+0x136/0x240 net/core/filter.c:4311
 __napi_poll+0xe4/0x490 net/core/dev.c:6774
 napi_poll net/core/dev.c:6840 [inline]
 net_rx_action+0x89b/0x1240 net/core/dev.c:6962
 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
 common_interrupt+0xaa/0xd0 arch/x86/kernel/irq.c:278
 </IRQ>
 <TASK>
 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 8e be 37 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 83 4f 9f f5 65 8b 05 04 46 40 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc900035a7b60 EFLAGS: 00000206
RAX: c97183fe8872c200 RBX: 1ffff920006b4f70 RCX: ffffffff817022aa
RDX: dffffc0000000000 RSI: ffffffff8c0ad540 RDI: 0000000000000001
RBP: ffffc900035a7bf0 R08: ffffffff93737817 R09: 1ffffffff26e6f02
R10: dffffc0000000000 R11: fffffbfff26e6f03 R12: dffffc0000000000
R13: 1ffff920006b4f6c R14: ffffc900035a7b80 R15: 0000000000000246
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 do_notify_parent_cldstop+0x9ab/0xb50 kernel/signal.c:2216
 ptrace_stop+0x465/0x940 kernel/signal.c:2319
 ptrace_do_notify kernel/signal.c:2393 [inline]
 ptrace_notify+0x255/0x380 kernel/signal.c:2405
 ptrace_report_syscall include/linux/ptrace.h:415 [inline]
 ptrace_report_syscall_entry include/linux/ptrace.h:452 [inline]
 syscall_trace_enter+0x5d/0x150 kernel/entry/common.c:45
 syscall_enter_from_user_mode_work include/linux/entry-common.h:168 [inline]
 syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline]
 do_syscall_64+0xcc/0x230 arch/x86/entry/common.c:79
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7692d0be60
Code: ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 80 3d 41 e2 07 00 00 74 17 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c
RSP: 002b:00007ffc4073c208 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000015 RCX: 00007f7692d0be60
RDX: ffffffffffffffb8 RSI: 0000000020000200 RDI: 0000000000000014
RBP: 0000000000000000 R08: 00007ffc4073c338 R09: 00007ffc4073c338
R10: 00007ffc4073c338 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffc4073c240 R15: 00007ffc4073c230
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__cpu_map_flush+0x42/0xd0
Code: e8 13 8c d6 ff 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 8d 10 3e 00 49 8b 1e 4c 39 f3 74 77 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 6f 10 3e 00 4c 8b 23 48 8d 7b c0
RSP: 0018:ffffc90000007b10 EFLAGS: 00010202
RAX: 03fffe2202e4cfad RBX: 1ffff11017267d6b RCX: ffff888026d15a00
RDX: 0000000080000102 RSI: 0000000000000000 RDI: ffffc900035a7800
RBP: dffffc0000000000 R08: ffffffff8992342a R09: 1ffffffff202fc75
R10: dffffc0000000000 R11: fffffbfff202fc76 R12: ffffc900035a7800
R13: ffffc900035a77c0 R14: ffffc900035a7800 R15: dffffc0000000000
FS:  00005555697ee380(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 0000000076e4c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e8 13 8c d6 ff       	call   0xffd68c18
   5:	4c 89 f0             	mov    %r14,%rax
   8:	48 c1 e8 03          	shr    $0x3,%rax
   c:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1)
  11:	74 08                	je     0x1b
  13:	4c 89 f7             	mov    %r14,%rdi
  16:	e8 8d 10 3e 00       	call   0x3e10a8
  1b:	49 8b 1e             	mov    (%r14),%rbx
  1e:	4c 39 f3             	cmp    %r14,%rbx
  21:	74 77                	je     0x9a
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 6f 10 3e 00       	call   0x3e10a8
  39:	4c 8b 23             	mov    (%rbx),%r12
  3c:	48 8d 7b c0          	lea    -0x40(%rbx),%rdi

Crashes (25):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/07/27 07:59 linux-next 668d33c9ff92 46eb10b7 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/24 11:44 linux-next 9ec6ec93f2c1 57b2edb1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/31 12:23 upstream 22f546873149 6fde257d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/29 16:13 upstream dc1c8034e31b 5187fc86 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in __cpu_map_flush
2024/07/27 16:05 upstream 3a7e02c040b1 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in __cpu_map_flush
2024/07/25 16:46 upstream c33ffdb70cc6 32fcf98f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in __cpu_map_flush
2024/07/24 19:18 upstream 786c8248dbd3 b24754ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/19 10:57 upstream 68b59730459e ee4e11c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in __cpu_map_flush
2024/07/18 21:30 upstream b1bc554e009e 7403ec00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in __cpu_map_flush
2024/07/18 21:30 upstream b1bc554e009e 7403ec00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in __cpu_map_flush
2024/08/01 15:12 upstream 21b136cc63d2 1e9c4cf3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in __cpu_map_flush
2024/07/20 05:00 upstream 8e5c0abfa02d b88348e9 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in __cpu_map_flush
2024/07/30 10:55 linux-next 931a3b3bccc9 a4e01e1e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/29 04:59 linux-next 931a3b3bccc9 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/27 03:39 linux-next 668d33c9ff92 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/27 02:45 linux-next 668d33c9ff92 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/24 09:42 linux-next 9ec6ec93f2c1 57b2edb1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/21 09:09 linux-next 41c196e567fb b88348e9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/19 01:28 linux-next 73399b58e5e5 ee4e11c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/18 23:57 linux-next 73399b58e5e5 ee4e11c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/14 22:24 linux-next 3fe121b62282 eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/09 12:28 linux-next 82d01fe6ee52 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __cpu_map_flush
2024/07/30 21:15 upstream 94ede2a3e913 3d5fb491 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte BUG: unable to handle kernel NULL pointer dereference in __cpu_map_flush
2024/07/18 21:02 upstream b1bc554e009e bbc40cc8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 BUG: unable to handle kernel NULL pointer dereference in __cpu_map_flush
2024/07/18 21:02 upstream b1bc554e009e bbc40cc8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 BUG: unable to handle kernel NULL pointer dereference in __cpu_map_flush
* Struck through repros no longer work on HEAD.