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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: 368d, last: 18h39m
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[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 751d 753d 22/26 fixed on 2023/02/24 13:50
upstream KMSAN: uninit-value in ___bpf_prog_run bpf C 75 1439d 1441d 0/26 closed as invalid on 2020/05/28 10:23
upstream KMSAN: uninit-value in ___bpf_prog_run (2) bpf C 587 1386d 1389d 0/26 closed as invalid on 2020/07/22 14:22
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/02/06 00:24 20m retest repro upstream error OK

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:115 [inline]
BUG: KMSAN: uninit-value in arch_atomic_fetch_xor arch/x86/include/asm/atomic.h:173 [inline]
BUG: KMSAN: uninit-value in raw_atomic_fetch_xor include/linux/atomic/atomic-arch-fallback.h:1810 [inline]
BUG: KMSAN: uninit-value in atomic_fetch_xor include/linux/atomic/atomic-instrumented.h:1046 [inline]
BUG: KMSAN: uninit-value in ___bpf_prog_run+0xd874/0xe0f0 kernel/bpf/core.c:2158
 arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:115 [inline]
 arch_atomic_fetch_xor arch/x86/include/asm/atomic.h:173 [inline]
 raw_atomic_fetch_xor include/linux/atomic/atomic-arch-fallback.h:1810 [inline]
 atomic_fetch_xor include/linux/atomic/atomic-instrumented.h:1046 [inline]
 ___bpf_prog_run+0xd874/0xe0f0 kernel/bpf/core.c:2158
 __bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2238
 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
 __bpf_prog_run include/linux/filter.h:657 [inline]
 bpf_prog_run include/linux/filter.h:664 [inline]
 bpf_prog_run_pin_on_cpu include/linux/filter.h:681 [inline]
 bpf_flow_dissect+0x12a/0x4c0 net/core/flow_dissector.c:991
 bpf_prog_test_run_flow_dissector+0x6f8/0xa30 net/bpf/test_run.c:1361
 bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4269
 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5678
 __do_sys_bpf kernel/bpf/syscall.c:5767 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5765 [inline]
 __x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5765
 x64_sys_call+0x96b/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable stack created at:
 __bpf_prog_run512+0x45/0xe0 kernel/bpf/core.c:2238
 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
 __bpf_prog_run include/linux/filter.h:657 [inline]
 bpf_prog_run include/linux/filter.h:664 [inline]
 bpf_prog_run_pin_on_cpu include/linux/filter.h:681 [inline]
 bpf_flow_dissect+0x12a/0x4c0 net/core/flow_dissector.c:991

CPU: 0 PID: 5045 Comm: syz-executor183 Not tainted 6.9.0-rc6-syzkaller-00046-g18daea77cca6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
=====================================================

Crashes (130):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2024/05/06 02:35 upstream b9158815de52 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/05/03 15:21 upstream f03359bca01b 375d4445 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/05/02 09:34 upstream 0106679839f7 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/05/02 07:39 upstream 0106679839f7 3ba885bc .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 01:42 upstream 50dffbf77180 9e0e6af1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/04/26 21:28 upstream c942a0cd3603 059e9963 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/04/26 05:01 upstream e33c4963bf53 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/04/22 17:26 upstream ed30a4a51bb1 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/04/17 20:20 upstream 96fca68c4fbf bd38b692 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/04/13 19:41 upstream 8f2c057754b2 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/04/12 18:41 upstream 586b5dfb51b9 27de0a5c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/04/10 16:35 upstream 2c71fdf02a95 56086b24 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/04/06 10:13 upstream e8b0ccb2a787 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/04/04 17:35 upstream c85af715cac0 0ee3535e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/04/04 11:41 upstream c85af715cac0 51c4dcff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/04/02 19:38 upstream 026e680b0a08 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/03/30 11:16 upstream 486291a0e624 6baf5069 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/03/27 11:14 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/03/27 09:27 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/03/13 16:13 upstream 9187210eee7d db5b7ff0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/03/05 19:43 upstream 90d35da658da f39a7eed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/03/01 16:27 upstream 87adedeba51a 352ab904 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/01/21 07:30 upstream 9f8413c4a66f 9bd8dcda .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ___bpf_prog_run
2024/01/14 02:56 upstream 9f8413c4a66f 551587c1 .config console log report info [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
2024/05/01 21:38 upstream 18daea77cca6 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in ___bpf_prog_run
2024/04/07 09:53 upstream f2f80ac80987 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in ___bpf_prog_run
2024/04/05 02:08 upstream c85af715cac0 0ee3535e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in ___bpf_prog_run
2024/03/28 23:07 upstream 8d025e2092e2 120789fd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in ___bpf_prog_run
2024/03/27 15:26 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in ___bpf_prog_run
2024/03/27 12:57 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in ___bpf_prog_run
2024/03/25 09:52 upstream 5e74df2f8f15 0ea90952 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in ___bpf_prog_run
2024/02/28 14:38 upstream cf1182944c7c d367cbe5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in ___bpf_prog_run
2024/02/20 19:02 upstream b401b621758e 3af7dd65 .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
2023/11/15 16:18 upstream c42d9eeef8e5 cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/11/04 17:03 upstream 90b0c2b2edd1 500bfdc4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/11/04 16:53 upstream 90b0c2b2edd1 500bfdc4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/10/15 06:29 upstream 70f8c6f8f880 6388bc36 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/09/26 04:27 upstream 6465e260f487 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/09/23 05:00 upstream dc912ba91b7e 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/09/18 05:03 upstream e789286468a9 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/09/12 06:02 upstream 0bb80ecc33a8 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/08/30 19:43 upstream 6c1b980a7e79 84803932 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/08/24 20:06 upstream 93f5de5f648d 4d7ae7ab .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/08/21 23:03 upstream f7757129e3de 6b415825 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/08/14 19:18 upstream 2ccdd1b13c59 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/07/29 17:33 upstream ffabf7c73176 92476829 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/07/26 03:46 upstream af2e19389c2c 6756545c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/07/16 13:43 upstream 831fe284d827 35d9ecc5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/07/15 03:22 upstream 2772d7df3c93 35d9ecc5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in ___bpf_prog_run
2023/07/09 09:38 https://github.com/google/kmsan.git master 257152fe29be 668cb1fa .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.