syzbot


KCSAN: data-race in do_select / pollwake (2)

Status: moderation: reported on 2023/12/09 00:09
Subsystems: exfat
[Documentation on labels]
Reported-by: syzbot+98a4e3481a6349deaf03@syzkaller.appspotmail.com
First crash: 614d, last: 10h28m
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in do_select / pollwake fs 2554 653d 1675d 0/28 auto-obsoleted due to no activity on 2023/05/29 14:18

Sample crash report:
==================================================================
BUG: KCSAN: data-race in do_select / pollwake

read to 0xffffc90003b07a00 of 4 bytes by task 6640 on cpu 0:
 poll_schedule_timeout fs/select.c:240 [inline]
 do_select+0xe8a/0xfc0 fs/select.c:603
 core_sys_select+0x362/0x530 fs/select.c:677
 do_pselect fs/select.c:759 [inline]
 __do_sys_pselect6 fs/select.c:802 [inline]
 __se_sys_pselect6+0x21b/0x280 fs/select.c:793
 __x64_sys_pselect6+0x78/0x90 fs/select.c:793
 x64_sys_call+0x2ac2/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:271
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffffc90003b07a00 of 4 bytes by interrupt on cpu 1:
 __pollwake fs/select.c:195 [inline]
 pollwake+0xbe/0x110 fs/select.c:215
 __wake_up_common kernel/sched/wait.c:89 [inline]
 __wake_up_common_lock kernel/sched/wait.c:106 [inline]
 __wake_up+0x65/0xb0 kernel/sched/wait.c:127
 bpf_ringbuf_notify+0x22/0x30 kernel/bpf/ringbuf.c:154
 irq_work_single kernel/irq_work.c:221 [inline]
 irq_work_run_list kernel/irq_work.c:252 [inline]
 irq_work_run+0xdf/0x2c0 kernel/irq_work.c:261
 __sysvec_irq_work+0x23/0x1a0 arch/x86/kernel/irq_work.c:22
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x66/0x80 arch/x86/kernel/irq_work.c:17
 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
 native_apic_mem_write arch/x86/include/asm/apic.h:101 [inline]
 __default_send_IPI_shortcut arch/x86/kernel/apic/ipi.c:166 [inline]
 default_send_IPI_self+0x38/0x80 arch/x86/kernel/apic/ipi.c:247
 __apic_send_IPI_self arch/x86/include/asm/apic.h:455 [inline]
 arch_irq_work_raise+0x48/0x50 arch/x86/kernel/irq_work.c:31
 irq_work_raise kernel/irq_work.c:84 [inline]
 __irq_work_queue_local+0x82/0x1d0 kernel/irq_work.c:112
 irq_work_queue+0x85/0x120 kernel/irq_work.c:124
 ____bpf_ringbuf_discard kernel/bpf/ringbuf.c:532 [inline]
 bpf_ringbuf_discard+0xcd/0xf0 kernel/bpf/ringbuf.c:530
 bpf_prog_fe0ed97373b08409+0x47/0x4b
 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline]
 __bpf_prog_run include/linux/filter.h:701 [inline]
 bpf_prog_run include/linux/filter.h:708 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2371 [inline]
 bpf_trace_run3+0x10c/0x1d0 kernel/trace/bpf_trace.c:2413
 __traceiter_kmem_cache_free+0x33/0x50 include/trace/events/kmem.h:114
 __do_trace_kmem_cache_free include/trace/events/kmem.h:114 [inline]
 trace_kmem_cache_free include/trace/events/kmem.h:114 [inline]
 kmem_cache_free+0x237/0x2d0 mm/slub.c:4710
 __kfree_skb+0x102/0x150 net/core/skbuff.c:1205
 sk_skb_reason_drop+0xba/0x290 net/core/skbuff.c:1242
 kfree_skb_reason include/linux/skbuff.h:1271 [inline]
 kfree_skb include/linux/skbuff.h:1280 [inline]
 tipc_msg_reverse+0x132/0x4c0 net/tipc/msg.c:672
 tipc_sk_rcv+0xd70/0x1020 net/tipc/socket.c:2514
 tipc_node_xmit+0x211/0x860 net/tipc/node.c:1701
 __tipc_sendmsg+0x15ae/0x1c40 net/tipc/socket.c:1511
 tipc_sendmsg+0x3e/0x60 net/tipc/socket.c:1399
 sock_sendmsg_nosec net/socket.c:713 [inline]
 __sock_sendmsg+0x140/0x180 net/socket.c:728
 ____sys_sendmsg+0x312/0x410 net/socket.c:2568
 ___sys_sendmsg net/socket.c:2622 [inline]
 __sys_sendmmsg+0x227/0x4b0 net/socket.c:2711
 __do_sys_sendmmsg net/socket.c:2738 [inline]
 __se_sys_sendmmsg net/socket.c:2735 [inline]
 __x64_sys_sendmmsg+0x57/0x70 net/socket.c:2735
 x64_sys_call+0x29aa/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:308
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 6651 Comm: syz.4.1300 Not tainted 6.14.0-rc1-syzkaller-00034-g92514ef226f5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
==================================================================

Crashes (1194):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/06 03:46 upstream 92514ef226f5 577d049b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/02/05 14:50 upstream 5c8c229261f1 4dc70884 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/02/05 10:27 upstream 5c8c229261f1 5896748e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/02/04 20:59 upstream d009de7d5428 5896748e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/02/04 19:32 upstream d009de7d5428 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/02/04 00:39 upstream 0de63bb7d919 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/02/03 12:07 upstream 2014c95afece a21a8419 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/02/02 09:57 upstream a86bf2283d2c 568559e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/02/01 20:51 upstream cabb4685d57e 568559e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/02/01 07:46 upstream 60c828cf80c0 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/31 18:34 upstream 69b8923f5003 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/31 05:21 upstream 69e858e0b8b2 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/30 16:03 upstream 72deda0abee6 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/30 02:53 upstream ebbb8be421ee afe4eff5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/29 20:43 upstream ebbb8be421ee 136953f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/29 13:24 upstream 05dbaf8dd8bf 136953f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/29 02:42 upstream 05dbaf8dd8bf 865ef71e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/28 12:08 upstream 6d61a53dd6f5 18070896 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/27 22:17 upstream 805ba04cb7cc 18070896 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/27 11:37 upstream 9c5968db9e62 d99a33ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/26 22:24 upstream c2da8b3f914f 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/26 09:03 upstream aa22f4da2a46 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/26 09:01 upstream aa22f4da2a46 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/25 19:16 upstream 0f8e26b38d7a 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/25 05:00 upstream b46c89c08f41 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/25 03:58 upstream b46c89c08f41 1293872d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/24 15:09 upstream 113691ce9f32 1293872d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/24 08:05 upstream bc8198dc7ebc 521b0ce3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/23 18:44 upstream d0d106a2bd21 521b0ce3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/23 09:07 upstream 21266b8df522 a44b0418 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/22 20:19 upstream df60eac9efe8 a44b0418 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/22 15:39 upstream c4b9570cfb63 a44b0418 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/22 08:26 upstream c4b9570cfb63 da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/21 18:44 upstream b9d8a295ed6b da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/21 17:22 upstream 95ec54a420b8 da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/21 09:37 upstream 95ec54a420b8 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/20 19:41 upstream 100ceb4817a2 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/20 15:30 upstream ffd294d346d1 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/19 19:00 upstream 9528d418de4d f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/18 22:59 upstream fda5e3f28400 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/18 02:12 upstream 595523945be0 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/17 11:50 upstream 9bffa1ad25b8 953d1c45 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/17 07:04 upstream 9bffa1ad25b8 f9e07a6e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2025/01/16 18:02 upstream ce69b4019001 f9e07a6e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
2023/11/16 21:16 upstream 7475e51b8796 cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_select / pollwake
* Struck through repros no longer work on HEAD.