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KMSAN: uninit-value in ___bpf_prog_run (4)

Status: upstream: reported C repro on 2023/12/26 15:59
Subsystems: bpf
[Documentation on labels]
Reported-by: syzbot+853242d9c9917165d791@syzkaller.appspotmail.com
First crash: 567d, last: 3d20h
▶ ▼ Discussions (7)
Title Replies (including bot) Last reply
[syzbot] Monthly bpf report (Oct 2024) 0 (1) 2024/10/15 21:53
[syzbot] Monthly bpf report (Sep 2024) 0 (1) 2024/09/14 12:53
[syzbot] Monthly bpf report (Aug 2024) 0 (1) 2024/08/14 12:43
[syzbot] Monthly bpf report (Jun 2024) 0 (1) 2024/06/12 22:41
[syzbot] Monthly bpf report (May 2024) 0 (1) 2024/05/12 18:21
[syzbot] Monthly bpf report (Mar 2024) 0 (1) 2024/03/11 10:18
[syzbot] [bpf?] KMSAN: uninit-value in ___bpf_prog_run (4) 0 (2) 2024/01/22 07:46
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in ___bpf_prog_run (3) bpf C 5 950d 951d 22/28 fixed on 2023/02/24 13:50
upstream KMSAN: uninit-value in ___bpf_prog_run bpf C 75 1638d 1639d 0/28 closed as invalid on 2020/05/28 10:23
upstream KMSAN: uninit-value in ___bpf_prog_run (2) bpf C 587 1584d 1587d 0/28 closed as invalid on 2020/07/22 14:22
▶ ▼ Last patch testing requests (6)
Created Duration User Patch Repo Result
2024/10/29 16:41 28m retest repro upstream OK log
2024/10/29 16:41 21m retest repro upstream report log
2024/10/29 16:41 28m retest repro upstream OK log
2024/06/25 04:27 23m retest repro upstream error
2024/06/25 04:27 33m retest repro upstream error
2024/02/06 00:24 20m retest repro upstream error

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in ___bpf_prog_run+0x94d5/0xe0f0 kernel/bpf/core.c:2092
 ___bpf_prog_run+0x94d5/0xe0f0 kernel/bpf/core.c:2092
 __bpf_prog_run32+0xc2/0xf0 kernel/bpf/core.c:2251
 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline]
 __bpf_prog_run include/linux/filter.h:691 [inline]
 bpf_prog_run include/linux/filter.h:698 [inline]
 ppp_send_frame drivers/net/ppp/ppp_generic.c:1780 [inline]
 __ppp_xmit_process+0x4fa/0x27b0 drivers/net/ppp/ppp_generic.c:1661
 ppp_xmit_process+0x100/0x2b0 drivers/net/ppp/ppp_generic.c:1682
 ppp_write+0x723/0x910 drivers/net/ppp/ppp_generic.c:536
 vfs_write+0x493/0x1550 fs/read_write.c:588
 ksys_write+0x20f/0x4c0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x93/0xe0 fs/read_write.c:652
 x64_sys_call+0x306a/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was stored to memory at:
 ___bpf_prog_run+0x98e7/0xe0f0 kernel/bpf/core.c:2010
 __bpf_prog_run32+0xc2/0xf0 kernel/bpf/core.c:2251
 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline]
 __bpf_prog_run include/linux/filter.h:691 [inline]
 bpf_prog_run include/linux/filter.h:698 [inline]
 ppp_send_frame drivers/net/ppp/ppp_generic.c:1780 [inline]
 __ppp_xmit_process+0x4fa/0x27b0 drivers/net/ppp/ppp_generic.c:1661
 ppp_xmit_process+0x100/0x2b0 drivers/net/ppp/ppp_generic.c:1682
 ppp_write+0x723/0x910 drivers/net/ppp/ppp_generic.c:536
 vfs_write+0x493/0x1550 fs/read_write.c:588
 ksys_write+0x20f/0x4c0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x93/0xe0 fs/read_write.c:652
 x64_sys_call+0x306a/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:3994 [inline]
 slab_alloc_node mm/slub.c:4037 [inline]
 kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4080
 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:583
 __alloc_skb+0x363/0x7b0 net/core/skbuff.c:674
 alloc_skb include/linux/skbuff.h:1320 [inline]
 ppp_write+0xe5/0x910 drivers/net/ppp/ppp_generic.c:519
 vfs_write+0x493/0x1550 fs/read_write.c:588
 ksys_write+0x20f/0x4c0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x93/0xe0 fs/read_write.c:652
 x64_sys_call+0x306a/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 5180 Comm: syz-executor103 Not tainted 6.11.0-rc2-syzkaller-00257-g5189dafa4cf9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
=====================================================

Crashes (264):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/08/11 18:17 upstream 5189dafa4cf9 6f4edef4 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/11/17 10:06 upstream 4a5df3796467 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/11/15 08:03 upstream cfaaa7d010d1 f6ede3a3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/11/14 16:19 upstream 0a9b9d17f3a7 77f3eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/11/12 09:57 upstream 2d5404caa8c7 75bb1b32 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/11/12 08:41 upstream 2d5404caa8c7 75bb1b32 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/11/07 17:53 upstream ff7afaeca1a1 c069283c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/11/07 01:27 upstream 7758b206117d df3dc63b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/11/06 00:49 upstream 2e1b3cc9d7f7 3a465482 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/11/01 09:45 upstream 6c52d4da1c74 96eb609f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/10/15 15:14 upstream eca631b8fe80 14943bb8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/10/15 03:36 upstream eca631b8fe80 b01b6661 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/10/14 03:43 upstream cfea70e835b9 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/10/02 01:25 upstream e32cde8d2bd7 ea2b66a6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/09/25 14:26 upstream 684a64bf32b6 349a68c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/09/25 03:45 upstream 97d8894b6f4c 5643e0e9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/09/21 03:46 upstream baeb9a7d8b60 6f888b75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/09/15 08:35 upstream 0babf683783d 08d8a733 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/09/12 08:01 upstream 7c6a3a65ace7 d94c83d8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/09/10 02:58 upstream bc83b4d1f086 dd9c7e97 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/09/09 03:01 upstream 5dadc1be8fc5 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/09/08 07:01 upstream d1f2d51b711a 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/09/06 00:02 upstream c763c4339688 464ac2ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/09/04 17:32 upstream 88fac17500f4 9d47f20a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/09/03 05:02 upstream 67784a74e258 abeaa9b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/29 10:20 upstream 928f79a188aa ef3de9e8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/28 20:14 upstream 86987d84b968 940f38c1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/28 06:08 upstream 3ec3f5fc4a91 6c853ff9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/26 00:23 upstream 5be63fc19fca d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/25 08:57 upstream 48fb4b3d9b43 d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/24 23:49 upstream d2bafcf224f3 d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/20 16:57 upstream 6e4436539ae1 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/20 15:16 upstream 6e4436539ae1 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/17 22:22 upstream e5fa841af679 dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/17 03:22 upstream d7a5aa4b3c00 76120936 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/17 03:22 upstream d7a5aa4b3c00 76120936 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/14 11:40 upstream 6b0f8db921ab bde81f6f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/12 04:34 upstream 7006fe2f7f78 6f4edef4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/11 15:12 upstream 5189dafa4cf9 6f4edef4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/09 21:03 upstream ee9a43b7cfe2 a9e7e9e3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/07 21:43 upstream d4560686726f 7b2f2f35 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/07 20:27 upstream d4560686726f 7b2f2f35 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/07 17:43 upstream d4560686726f 7b2f2f35 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/08/05 00:27 upstream a5dbd76a8942 1786a2a8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/05/01 22:49 upstream 18daea77cca6 3ba885bc .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/01/22 07:45 upstream 9f8413c4a66f 9bd8dcda .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2023/12/20 15:15 upstream 55cb5f43689d 3ad490ea .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/06/06 06:55 upstream 101b7a97143a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in ___bpf_prog_run
2023/12/06 23:22 upstream bee0e7762ad2 e3299f55 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/11/21 14:44 upstream 98b1cc82c4af cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
* Struck through repros no longer work on HEAD.