syzbot


KMSAN: uninit-value in ipgre_xmit

Status: auto-obsoleted due to no activity on 2024/02/16 10:43
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+2cb7b1bd08dc77ae7f89@syzkaller.appspotmail.com
First crash: 170d, last: 76d
Discussions (2)
Title Replies (including bot) Last reply
Re: [syzbot] [net?] KMSAN: uninit-value in ipgre_xmit 2 (2) 2023/12/07 12:38
[syzbot] [net?] KMSAN: uninit-value in ipgre_xmit 1 (2) 2023/11/29 10:04

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in __gre_xmit net/ipv4/ip_gre.c:469 [inline]
BUG: KMSAN: uninit-value in ipgre_xmit+0xdc2/0xe20 net/ipv4/ip_gre.c:662
 __gre_xmit net/ipv4/ip_gre.c:469 [inline]
 ipgre_xmit+0xdc2/0xe20 net/ipv4/ip_gre.c:662
 __netdev_start_xmit include/linux/netdevice.h:4940 [inline]
 netdev_start_xmit include/linux/netdevice.h:4954 [inline]
 xmit_one net/core/dev.c:3545 [inline]
 dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3561
 __dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4346
 dev_queue_xmit include/linux/netdevice.h:3134 [inline]
 __bpf_tx_skb net/core/filter.c:2133 [inline]
 __bpf_redirect_no_mac net/core/filter.c:2163 [inline]
 __bpf_redirect+0xdd7/0x1600 net/core/filter.c:2186
 ____bpf_clone_redirect net/core/filter.c:2457 [inline]
 bpf_clone_redirect+0x328/0x470 net/core/filter.c:2429
 ___bpf_prog_run+0x2180/0xdb80 kernel/bpf/core.c:1958
 __bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2199
 bpf_dispatcher_nop_func include/linux/bpf.h:1196 [inline]
 __bpf_prog_run include/linux/filter.h:651 [inline]
 bpf_prog_run include/linux/filter.h:658 [inline]
 bpf_test_run+0x482/0xb00 net/bpf/test_run.c:423
 bpf_prog_test_run_skb+0x14e5/0x1f20 net/bpf/test_run.c:1045
 bpf_prog_test_run+0x6af/0xac0 kernel/bpf/syscall.c:4040
 __sys_bpf+0x649/0xd60 kernel/bpf/syscall.c:5401
 __do_sys_bpf kernel/bpf/syscall.c:5487 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5485 [inline]
 __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5485
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
 entry_SYSENTER_compat_after_hwframe+0x70/0x7a

Uninit was created at:
 slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768
 slab_alloc_node mm/slub.c:3478 [inline]
 kmem_cache_alloc_node+0x5e9/0xb10 mm/slub.c:3523
 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560
 pskb_expand_head+0x226/0x1a00 net/core/skbuff.c:2098
 skb_ensure_writable+0x3d3/0x460 net/core/skbuff.c:5958
 __bpf_try_make_writable net/core/filter.c:1662 [inline]
 bpf_try_make_writable net/core/filter.c:1668 [inline]
 bpf_try_make_head_writable net/core/filter.c:1676 [inline]
 ____bpf_clone_redirect net/core/filter.c:2451 [inline]
 bpf_clone_redirect+0x17f/0x470 net/core/filter.c:2429
 ___bpf_prog_run+0x2180/0xdb80 kernel/bpf/core.c:1958
 __bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2199
 bpf_dispatcher_nop_func include/linux/bpf.h:1196 [inline]
 __bpf_prog_run include/linux/filter.h:651 [inline]
 bpf_prog_run include/linux/filter.h:658 [inline]
 bpf_test_run+0x482/0xb00 net/bpf/test_run.c:423
 bpf_prog_test_run_skb+0x14e5/0x1f20 net/bpf/test_run.c:1045
 bpf_prog_test_run+0x6af/0xac0 kernel/bpf/syscall.c:4040
 __sys_bpf+0x649/0xd60 kernel/bpf/syscall.c:5401
 __do_sys_bpf kernel/bpf/syscall.c:5487 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5485 [inline]
 __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5485
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
 entry_SYSENTER_compat_after_hwframe+0x70/0x7a

CPU: 0 PID: 5818 Comm: syz-executor.2 Not tainted 6.7.0-rc4-syzkaller-00039-g9ace34a8e446 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
=====================================================

Crashes (50):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/12/08 10:42 upstream 9ace34a8e446 28b24332 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/12/08 05:08 upstream 9ace34a8e446 28b24332 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/12/07 08:44 upstream bee0e7762ad2 e3299f55 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/12/06 21:51 upstream bee0e7762ad2 e3299f55 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/12/04 10:03 upstream 33cc938e65a9 f819d6f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/12/02 18:37 upstream 815fb87b7530 f819d6f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/11/30 03:07 upstream 3b47bc037bd4 6e78f9ce .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/11/29 04:34 upstream 18d46e76d7c2 1adfb6f6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/11/27 09:11 upstream d2da77f431ac 5b429f39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/11/26 22:31 upstream 090472ed9c92 5b429f39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/11/21 13:19 upstream 98b1cc82c4af cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/11/21 06:12 upstream 98b1cc82c4af cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/11/21 03:07 upstream 98b1cc82c4af cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/11/18 01:02 upstream 6bc40e44f1dd cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/11/15 23:45 upstream c42d9eeef8e5 cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/11/12 05:02 upstream 3ca112b71f35 6d6dbf8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/11/12 04:55 upstream 3ca112b71f35 6d6dbf8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/11/11 14:29 upstream ac347a0655db 6d6dbf8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/31 09:59 upstream 14ab6d425e80 b5729d82 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/28 12:47 upstream 888cf78c29e2 3c418d72 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/27 12:38 upstream 3a568e3a961b bf285f0c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/24 10:44 upstream e017769f4ce2 af8d2e46 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/24 09:22 upstream e017769f4ce2 af8d2e46 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/20 14:32 upstream ce55c22ec8b2 a42250d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/17 01:49 upstream 58720809f527 6388bc36 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/11 12:29 upstream 1c8b86a3799f 83165b57 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/11 12:25 upstream 1c8b86a3799f 83165b57 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/11 10:52 upstream 1c8b86a3799f 83165b57 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/07 01:08 upstream af95dc6fdc25 ea12a918 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/05 09:33 upstream ba7d997a2a29 b7d7ff54 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/05 09:33 upstream ba7d997a2a29 b7d7ff54 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/03 04:54 upstream 8f1b4600373f 50b20e75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/10/02 12:23 upstream 8a749fd1a872 8e26a358 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/30 20:55 upstream 9f3ebbef746f 8e26a358 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/28 07:13 upstream 633b47cb009d 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/28 07:13 upstream 633b47cb009d 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/28 06:47 upstream 633b47cb009d 2895a507 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/22 08:02 upstream 27bbf45eae9c 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/21 19:17 upstream 42dc814987c1 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/20 04:38 upstream 2cf0f7156238 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/19 14:54 upstream 2cf0f7156238 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/16 18:36 upstream 57d88e8a5974 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/15 08:32 upstream 9fdfb15a3dbf 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/14 13:31 upstream aed8aee11130 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/11 01:58 upstream 535a265d7f0d 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/10 08:16 upstream a3c57ab79a06 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/07 03:37 upstream 65d6e954e378 72324844 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/05 12:14 upstream 3f86ed6ec0b3 8bc9053e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/05 09:54 upstream 3f86ed6ec0b3 8bc9053e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
2023/09/05 09:53 upstream 3f86ed6ec0b3 8bc9053e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ipgre_xmit
* Struck through repros no longer work on HEAD.