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: 439d, last: 13d
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 Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in __fib6_drop_pcpu_from (5) net 8 467 439d 484d 26/29 fixed on 2024/06/18 11:11
upstream general protection fault in __fib6_drop_pcpu_from net 2 4 2268d 2273d 0/29 auto-closed as invalid on 2019/10/25 08:50
upstream general protection fault in __fib6_drop_pcpu_from (2) net 2 1 1891d 1891d 0/29 auto-closed as invalid on 2020/09/25 04:17
upstream general protection fault in __fib6_drop_pcpu_from (3) net 2 1 1747d 1747d 0/29 auto-closed as invalid on 2021/02/15 21:07
upstream general protection fault in __fib6_drop_pcpu_from (4) net 19 23 1339d 1647d 0/29 auto-closed as invalid on 2022/03/31 04:19
upstream KASAN: slab-out-of-bounds Read in __fib6_drop_pcpu_from net 17 1 2268d 2268d 12/29 fixed on 2019/07/10 21:40

Sample crash report:
bridge0: port 2(bridge_slave_1) entered disabled state
bridge_slave_0: left allmulticast mode
bridge_slave_0: left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000013: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000098-0x000000000000009f]
CPU: 1 UID: 0 PID: 11996 Comm: kworker/u8:0 Not tainted 6.17.0-rc2-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: netns cleanup_net
RIP: 0010:__fib6_drop_pcpu_from+0x1f0/0x3b0 net/ipv6/ip6_fib.c:993
Code: 48 c1 e8 03 42 80 3c 30 00 74 08 4c 89 ef e8 77 20 f0 f7 49 8b 6d 00 48 85 ed 74 2f 48 81 c5 90 00 00 00 48 89 e8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 ef e8 51 20 f0 f7 48 8b 45 00 48 3b 44
RSP: 0018:ffffc90019d96db0 EFLAGS: 00010213
RAX: 0000000000000013 RBX: ffffffff8dbded18 RCX: ffff88802a373c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000000009c R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f47027 R12: 0000000000000001
R13: ffffe8ffffdfb560 R14: dffffc0000000000 R15: ffff888146bd2120
FS:  0000000000000000(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa8f21f84c0 CR3: 000000003174f000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 fib6_drop_pcpu_from net/ipv6/ip6_fib.c:1027 [inline]
 fib6_purge_rt+0x10b/0x910 net/ipv6/ip6_fib.c:1038
 fib6_del_route net/ipv6/ip6_fib.c:2042 [inline]
 fib6_del+0xee1/0x1550 net/ipv6/ip6_fib.c:2087
 fib6_clean_node+0x29f/0x590 net/ipv6/ip6_fib.c:2249
 fib6_walk_continue+0x67b/0x910 net/ipv6/ip6_fib.c:2171
 fib6_walk+0x149/0x290 net/ipv6/ip6_fib.c:2219
 fib6_clean_tree net/ipv6/ip6_fib.c:2299 [inline]
 __fib6_clean_all+0x234/0x380 net/ipv6/ip6_fib.c:2315
 rt6_sync_down_dev net/ipv6/route.c:5005 [inline]
 rt6_disable_ip+0x120/0x720 net/ipv6/route.c:5010
 addrconf_ifdown+0x15d/0x1880 net/ipv6/addrconf.c:3853
 addrconf_notify+0x1bc/0x1010 net/ipv6/addrconf.c:-1
 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
 call_netdevice_notifiers net/core/dev.c:2281 [inline]
 netif_close_many+0x29c/0x410 net/core/dev.c:1784
 unregister_netdevice_many_notify+0x7b9/0x1ff0 net/core/dev.c:12124
 ops_exit_rtnl_list net/core/net_namespace.c:186 [inline]
 ops_undo_list+0x3dc/0x990 net/core/net_namespace.c:247
 cleanup_net+0x4c5/0x800 net/core/net_namespace.c:682
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 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+0x1f0/0x3b0 net/ipv6/ip6_fib.c:993
Code: 48 c1 e8 03 42 80 3c 30 00 74 08 4c 89 ef e8 77 20 f0 f7 49 8b 6d 00 48 85 ed 74 2f 48 81 c5 90 00 00 00 48 89 e8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 ef e8 51 20 f0 f7 48 8b 45 00 48 3b 44
RSP: 0018:ffffc90019d96db0 EFLAGS: 00010213
RAX: 0000000000000013 RBX: ffffffff8dbded18 RCX: ffff88802a373c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000000009c R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f47027 R12: 0000000000000001
R13: ffffe8ffffdfb560 R14: dffffc0000000000 R15: ffff888146bd2120
FS:  0000000000000000(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa8f21f84c0 CR3: 000000000df36000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	48 c1 e8 03          	shr    $0x3,%rax
   4:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1)
   9:	74 08                	je     0x13
   b:	4c 89 ef             	mov    %r13,%rdi
   e:	e8 77 20 f0 f7       	call   0xf7f0208a
  13:	49 8b 6d 00          	mov    0x0(%r13),%rbp
  17:	48 85 ed             	test   %rbp,%rbp
  1a:	74 2f                	je     0x4b
  1c:	48 81 c5 90 00 00 00 	add    $0x90,%rbp
  23:	48 89 e8             	mov    %rbp,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 ef             	mov    %rbp,%rdi
  34:	e8 51 20 f0 f7       	call   0xf7f0208a
  39:	48 8b 45 00          	mov    0x0(%rbp),%rax
  3d:	48                   	rex.W
  3e:	3b                   	.byte 0x3b
  3f:	44                   	rex.R

Crashes (232):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/18 13:37 upstream c17b750b3ad9 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2025/08/17 22:58 upstream 8d561baae505 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in __fib6_drop_pcpu_from
2025/07/27 16:31 upstream ec2df4364666 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/07/07 17:06 upstream d7b8f8e20813 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/05/08 10:19 upstream d76bb1ebb558 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root general protection fault in __fib6_drop_pcpu_from
2025/05/08 05:50 upstream d76bb1ebb558 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2025/05/06 21:52 upstream 0d8d44db295c ae98e6b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in __fib6_drop_pcpu_from
2025/05/03 02:17 upstream 2bfcee565c3a b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/04/30 17:43 upstream b6ea1680d0ac 85a5a23f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/04/27 05:15 upstream 5bc1018675ec c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
2025/04/23 08:13 upstream bc3372351d0c 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in __fib6_drop_pcpu_from
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
2024/11/12 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
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
2024/06/19 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
2025/05/15 15:41 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c919f08732cc d6b2ee52 .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
2025/05/09 04:07 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c32f8dc5aaf9 dbf35fa1 .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
2025/03/18 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.