syzbot


general protection fault in __fib6_drop_pcpu_from (6)

Status: upstream: reported on 2025/02/04 05:52
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+1e7754bbf472315fa1e2@syzkaller.appspotmail.com
First crash: 283d, last: 1d03h
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [net?] general protection fault in __fib6_drop_pcpu_from (6) 0 (1) 2025/02/04 05:52
Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in __fib6_drop_pcpu_from (5) net 467 283d 328d 26/28 fixed on 2024/06/18 11:11
upstream general protection fault in __fib6_drop_pcpu_from net 4 2112d 2117d 0/28 auto-closed as invalid on 2019/10/25 08:50
upstream general protection fault in __fib6_drop_pcpu_from (2) net 1 1735d 1735d 0/28 auto-closed as invalid on 2020/09/25 04:17
upstream general protection fault in __fib6_drop_pcpu_from (3) net 1 1591d 1591d 0/28 auto-closed as invalid on 2021/02/15 21:07
upstream general protection fault in __fib6_drop_pcpu_from (4) net 23 1183d 1491d 0/28 auto-closed as invalid on 2022/03/31 04:19
upstream KASAN: slab-out-of-bounds Read in __fib6_drop_pcpu_from net 1 2112d 2112d 12/28 fixed on 2019/07/10 21:40

Sample crash report:
veth1_macvtap: left promiscuous mode
veth0_macvtap: left promiscuous mode
veth1_vlan: left promiscuous mode
veth0_vlan: left promiscuous mode
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000016: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x00000000000000b0-0x00000000000000b7]
CPU: 1 UID: 0 PID: 3563 Comm: kworker/u8:8 Not tainted 6.14.0-syzkaller-03576-g1e1ba8d23dae #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: netns cleanup_net
RIP: 0010:__fib6_drop_pcpu_from.part.0+0x199/0x510 net/ipv6/ip6_fib.c:980
Code: 48 c1 ea 03 42 80 3c 32 00 0f 85 5e 03 00 00 4c 8b 28 4d 85 ed 74 2e e8 45 c6 ae f7 49 8d bd 90 00 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 24 03 00 00 49 8b 85 90 00 00 00 4c 39 e0 0f
RSP: 0018:ffffc9000c386fa0 EFLAGS: 00010212
RAX: 0000000000000016 RBX: 0000000000000001 RCX: 1ffffffff1b56b99
RDX: ffff888032548000 RSI: ffffffff8a0c3b3b RDI: 00000000000000b0
RBP: ffff88807b16f4b8 R08: 0000000000000005 R09: 0000000000000007
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88807b16f400
R13: 0000000000000020 R14: dffffc0000000000 R15: ffffed100f62dea2
FS:  0000000000000000(0000) GS:ffff888124f5a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeba04e6b8 CR3: 000000000df82000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __fib6_drop_pcpu_from net/ipv6/ip6_fib.c:1023 [inline]
 fib6_drop_pcpu_from net/ipv6/ip6_fib.c:1024 [inline]
 fib6_purge_rt+0x80a/0x9e0 net/ipv6/ip6_fib.c:1035
 fib6_del_route net/ipv6/ip6_fib.c:1995 [inline]
 fib6_del+0xa5e/0x1770 net/ipv6/ip6_fib.c:2040
 fib6_clean_node+0x424/0x5b0 net/ipv6/ip6_fib.c:2202
 fib6_walk_continue+0x452/0x8d0 net/ipv6/ip6_fib.c:2124
 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2172
 fib6_clean_tree+0xd4/0x110 net/ipv6/ip6_fib.c:2252
 __fib6_clean_all+0x107/0x2d0 net/ipv6/ip6_fib.c:2268
 rt6_sync_down_dev net/ipv6/route.c:4916 [inline]
 rt6_disable_ip+0x2ec/0x990 net/ipv6/route.c:4921
 addrconf_ifdown.isra.0+0x11d/0x1a90 net/ipv6/addrconf.c:3849
 addrconf_notify+0x220/0x19e0 net/ipv6/addrconf.c:3772
 notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2206
 call_netdevice_notifiers_extack net/core/dev.c:2244 [inline]
 call_netdevice_notifiers net/core/dev.c:2258 [inline]
 dev_close_many+0x319/0x630 net/core/dev.c:1748
 unregister_netdevice_many_notify+0x493/0x1fa0 net/core/dev.c:11858
 unregister_netdevice_many net/core/dev.c:11950 [inline]
 default_device_exit_batch+0x855/0xaf0 net/core/dev.c:12433
 ops_exit_list+0x12b/0x180 net/core/net_namespace.c:177
 cleanup_net+0x5c1/0xb30 net/core/net_namespace.c:652
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c1/0xef0 kernel/workqueue.c:3400
 kthread+0x3a7/0x760 kernel/kthread.c:464
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__fib6_drop_pcpu_from.part.0+0x199/0x510 net/ipv6/ip6_fib.c:980
Code: 48 c1 ea 03 42 80 3c 32 00 0f 85 5e 03 00 00 4c 8b 28 4d 85 ed 74 2e e8 45 c6 ae f7 49 8d bd 90 00 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 24 03 00 00 49 8b 85 90 00 00 00 4c 39 e0 0f
RSP: 0018:ffffc9000c386fa0 EFLAGS: 00010212
RAX: 0000000000000016 RBX: 0000000000000001 RCX: 1ffffffff1b56b99
RDX: ffff888032548000 RSI: ffffffff8a0c3b3b RDI: 00000000000000b0
RBP: ffff88807b16f4b8 R08: 0000000000000005 R09: 0000000000000007
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88807b16f400
R13: 0000000000000020 R14: dffffc0000000000 R15: ffffed100f62dea2
FS:  0000000000000000(0000) GS:ffff888124f5a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeba04e6b8 CR3: 000000000df82000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	42 80 3c 32 00       	cmpb   $0x0,(%rdx,%r14,1)
   9:	0f 85 5e 03 00 00    	jne    0x36d
   f:	4c 8b 28             	mov    (%rax),%r13
  12:	4d 85 ed             	test   %r13,%r13
  15:	74 2e                	je     0x45
  17:	e8 45 c6 ae f7       	call   0xf7aec661
  1c:	49 8d bd 90 00 00 00 	lea    0x90(%r13),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1) <-- trapping instruction
  2f:	0f 85 24 03 00 00    	jne    0x359
  35:	49 8b 85 90 00 00 00 	mov    0x90(%r13),%rax
  3c:	4c 39 e0             	cmp    %r12,%rax
  3f:	0f                   	.byte 0xf

Crashes (219):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/27 13:52 upstream 1e1ba8d23dae 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in __fib6_drop_pcpu_from
2025/03/26 00:49 upstream 2df0c02dab82 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/03/23 13:41 upstream 183601b78a9b 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/03/21 09:40 upstream b3ee1e460951 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/03/19 13:16 upstream 81e4f8d68c66 8d0a2921 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/03/06 19:23 upstream 848e07631744 831e3629 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/03/03 13:28 upstream 7eb172143d55 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/02/27 07:55 upstream 5394eea10651 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/02/26 19:44 upstream ac9c34d1e45a d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/02/23 03:32 upstream 5cf80612d3f7 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2025/02/16 12:33 upstream ad1b832bf1cf 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/02/15 23:46 upstream 7ff71e6d9239 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in __fib6_drop_pcpu_from
2025/02/14 01:01 upstream ab68d7eb7b1a a98a8417 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/02/11 06:29 upstream febbc555cf0f 43f51a00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/01/23 17:08 upstream 21266b8df522 a44b0418 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/01/22 07:19 upstream b9d8a295ed6b da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/01/16 08:39 upstream 619f0b6fad52 968edaf4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/01/07 22:07 upstream fbfd64d25c7a f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2024/12/23 01:33 upstream bcde95ce32b6 b4fbdbd4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in __fib6_drop_pcpu_from
2024/12/20 02:28 upstream 8faabc041a00 c87fa8a3 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto general protection fault in __fib6_drop_pcpu_from
2024/12/17 11:49 upstream f44d154d6e3d f93b2b55 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2024/12/17 06:01 upstream f44d154d6e3d f93b2b55 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in __fib6_drop_pcpu_from
2024/12/13 02:11 upstream 150b567e0d57 530e80f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2024/12/12 19:16 upstream 231825b2e1ff 530e80f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2024/12/10 22:29 upstream 7cb1b4663150 cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in __fib6_drop_pcpu_from
2024/12/10 16:35 upstream 7cb1b4663150 cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2024/12/10 11:07 upstream 7cb1b4663150 cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2024/12/10 08:46 upstream 7cb1b4663150 cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2024/12/09 23:14 upstream fac04efc5c79 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in __fib6_drop_pcpu_from
2024/12/04 12:42 upstream feffde684ac2 b50eb251 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2024/12/02 12:40 upstream e70140ba0d2b b499ea68 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2024/12/01 17:45 upstream bcc8eda6d349 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2024/12/01 15:29 upstream bcc8eda6d349 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2024/11/22 18:06 upstream 28eb75e178d3 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in __fib6_drop_pcpu_from
2024/11/21 01:53 upstream bf9aa14fc523 4fca1650 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in __fib6_drop_pcpu_from
2024/11/11 08:03 upstream a9cda7c0ffed 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in __fib6_drop_pcpu_from
2024/10/26 16:33 upstream 850925a8133c 65e8686b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2024/10/24 07:19 upstream c2ee9f594da8 15fa2979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in __fib6_drop_pcpu_from
2024/10/23 12:08 upstream c2ee9f594da8 15fa2979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in __fib6_drop_pcpu_from
2024/10/21 01:24 upstream 715ca9dd687f cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2024/10/20 19:37 upstream 715ca9dd687f cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2024/10/20 16:13 upstream 715ca9dd687f cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in __fib6_drop_pcpu_from
2024/10/20 08:06 upstream f9e4825524aa cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2024/10/19 10:16 upstream 3d5ad2d4eca3 cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in __fib6_drop_pcpu_from
2024/11/12 05:48 upstream 2d5404caa8c7 75bb1b32 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 general protection fault in __fib6_drop_pcpu_from
2025/01/06 16:30 upstream 5428dc1906dd f3558dbf .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in __fib6_drop_pcpu_from
2024/11/01 08:22 upstream 90602c251cda 96eb609f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in __fib6_drop_pcpu_from
2024/10/22 14:43 upstream c2ee9f594da8 a573a9f4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in __fib6_drop_pcpu_from
2025/02/25 17:11 linux-next e5d3fd687aac d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2025/02/09 09:20 linux-next ed58d103e6da ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2025/01/04 10:40 linux-next 8155b4ef3466 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2025/01/01 22:08 linux-next 8155b4ef3466 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2025/01/01 01:11 linux-next 8155b4ef3466 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2024/12/08 11:58 linux-next af2ea8ab7a54 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2024/10/20 12:52 linux-next 15e7d45e786a cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2024/10/19 18:32 linux-next 15e7d45e786a cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2024/06/19 07:53 upstream 2ccbdf43d5e7 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: slab-out-of-bounds Read in __fib6_drop_pcpu_from
2025/03/18 00:38 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a5618886fdab ce3352cd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in __fib6_drop_pcpu_from
2025/02/08 14:56 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 2014c95afece ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in __fib6_drop_pcpu_from
2025/01/23 07:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 1950a0af2d55 9d4f14f8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in __fib6_drop_pcpu_from
2025/01/14 01:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6251d1776bc5 b1f1cd88 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in __fib6_drop_pcpu_from
2025/01/08 07:54 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 573067a5a685 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in __fib6_drop_pcpu_from
2025/01/03 11:09 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 573067a5a685 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in __fib6_drop_pcpu_from
* Struck through repros no longer work on HEAD.