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Message-ID: <000000000000b77a880615a0ed2a@google.com> Date: Mon, 08 Apr 2024 19:46:27 -0700 From: syzbot <syzbot+d1ae9c954f73570e7b58@...kaller.appspotmail.com> To: anna-maria@...utronix.de, frederic@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com, tglx@...utronix.de Subject: [syzbot] [kernel?] WARNING in hrtimer_forward (2) Hello, syzbot found the following issue on: HEAD commit: 443574b03387 riscv, bpf: Fix kfunc parameters incompatibil.. git tree: bpf console output: https://syzkaller.appspot.com/x/log.txt?x=1579f7b1180000 kernel config: https://syzkaller.appspot.com/x/.config?x=6fb1be60a193d440 dashboard link: https://syzkaller.appspot.com/bug?extid=d1ae9c954f73570e7b58 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/3f355021a085/disk-443574b0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/44cf4de7472a/vmlinux-443574b0.xz kernel image: https://storage.googleapis.com/syzbot-assets/a99a36c7ad65/bzImage-443574b0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d1ae9c954f73570e7b58@...kaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 11239 at kernel/time/hrtimer.c:1053 hrtimer_forward+0x210/0x2d0 kernel/time/hrtimer.c:1053 Modules linked in: CPU: 1 PID: 11239 Comm: syz-executor.1 Not tainted 6.8.0-syzkaller-05236-g443574b03387 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:hrtimer_forward+0x210/0x2d0 kernel/time/hrtimer.c:1053 Code: 00 49 89 1e 48 8b 04 24 eb 07 e8 2b a4 12 00 31 c0 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 11 a4 12 00 90 <0f> 0b 90 eb e0 4c 89 f0 31 d2 49 f7 f4 48 89 04 24 49 89 c6 4d 0f RSP: 0018:ffffc90000a08bf8 EFLAGS: 00010246 RAX: ffffffff81824c5f RBX: 0000000000000001 RCX: ffff88805fe18000 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000003636b41721 R08: ffffffff81824af3 R09: 1ffffffff1f0d5cd R10: dffffc0000000000 R11: ffffffff81353f80 R12: 00000000061a8000 R13: ffff88805e27ef38 R14: 00000000cb354006 R15: 1ffff1100bc4fde3 FS: 00007f4b92fa26c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7730ed5690 CR3: 0000000047bcc000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: <IRQ> hrtimer_forward_now include/linux/hrtimer.h:355 [inline] mac80211_hwsim_beacon+0x192/0x1f0 drivers/net/wireless/virtual/mac80211_hwsim.c:2335 __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x595/0xd00 kernel/time/hrtimer.c:1756 hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1773 __do_softirq+0x2bc/0x943 kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633 irq_exit_rcu+0x9/0x30 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:bpf_prog_is_offloaded include/linux/bpf.h:2972 [inline] RIP: 0010:do_check+0x7a14/0x10740 kernel/bpf/verifier.c:17669 Code: 00 00 00 00 00 fc ff df 48 8b 1b b8 fa 00 00 00 48 01 c3 48 89 d8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 da 4d 00 00 0f b6 1b <31> ff 89 de e8 a3 0a eb ff 85 db 74 5a 48 ba 00 00 00 00 00 fc ff RSP: 0018:ffffc90005336dc0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc9000c2c8000 RSI: 000000000000a51a RDI: 000000000000a51b RBP: ffffc90005337120 R08: ffffffff81a9e50d R09: 1ffff1100bfc3000 R10: dffffc0000000000 R11: ffffed100bfc3001 R12: dffffc0000000000 R13: 0000000000000000 R14: ffffc90005337080 R15: ffff88805fe18000 do_check_common+0x14bd/0x1dd0 kernel/bpf/verifier.c:20508 do_check_main kernel/bpf/verifier.c:20599 [inline] bpf_check+0x126eb/0x18fe0 kernel/bpf/verifier.c:21269 bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2895 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5631 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline] __se_sys_bpf kernel/bpf/syscall.c:5736 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5736 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f4b9227de69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4b92fa20c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f4b923ac120 RCX: 00007f4b9227de69 RDX: 0000000000000048 RSI: 00000000200054c0 RDI: 0000000000000005 RBP: 00007f4b922ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f4b923ac120 R15: 00007ffdcb39eb48 </TASK> ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 48 8b fisttps -0x75(%rax) 3: 1b b8 fa 00 00 00 sbb 0xfa(%rax),%edi 9: 48 01 c3 add %rax,%rbx c: 48 89 d8 mov %rbx,%rax f: 48 c1 e8 03 shr $0x3,%rax 13: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax 18: 84 c0 test %al,%al 1a: 0f 85 da 4d 00 00 jne 0x4dfa 20: 0f b6 1b movzbl (%rbx),%ebx * 23: 31 ff xor %edi,%edi <-- trapping instruction 25: 89 de mov %ebx,%esi 27: e8 a3 0a eb ff call 0xffeb0acf 2c: 85 db test %ebx,%ebx 2e: 74 5a je 0x8a 30: 48 rex.W 31: ba 00 00 00 00 mov $0x0,%edx 36: 00 fc add %bh,%ah 38: ff .byte 0xff --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
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