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Message-ID: <67fac9a6.050a0220.379d84.0016.GAE@google.com> Date: Sat, 12 Apr 2025 13:14:30 -0700 From: syzbot <syzbot+064815c6cd721082a52a@...kaller.appspotmail.com> To: johannes@...solutions.net, linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: [syzbot] [wireless?] divide error in mac80211_hwsim_set_tsf Hello, syzbot found the following issue on: HEAD commit: 0af2f6be1b42 Linux 6.15-rc1 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1741cc04580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d444e5269179368a dashboard link: https://syzkaller.appspot.com/bug?extid=064815c6cd721082a52a compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=140f9070580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/8909dc8a51ee/disk-0af2f6be.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e216afa338a8/vmlinux-0af2f6be.xz kernel image: https://storage.googleapis.com/syzbot-assets/4d21115804e3/bzImage-0af2f6be.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+064815c6cd721082a52a@...kaller.appspotmail.com Oops: divide error: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 1148 Comm: kworker/u8:6 Not tainted 6.15.0-rc1-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:mac80211_hwsim_set_tsf+0x139/0x170 drivers/net/wireless/virtual/mac80211_hwsim.c:1239 Code: 48 89 9d 30 3f 00 00 4c 89 b5 28 3f 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc e8 9f cf c4 fa 45 89 ff 4c 89 e8 31 d2 <49> f7 f7 4d 29 ee 48 89 d3 48 f7 db eb a5 e8 54 40 29 fb e9 e7 fe RSP: 0018:ffffc90003ff7ad8 EFLAGS: 00010246 RAX: 00063249cd8022f2 RBX: 00063249cd8022f3 RCX: ffffffff86f66d11 RDX: 0000000000000000 RSI: ffffffff86f66d71 RDI: 0000000000000006 RBP: ffff8880236830a0 R08: 0000000000000006 R09: 0000000000000001 R10: 00063249cd8022f3 R11: 0000000000000000 R12: 0000000000000001 R13: 00063249cd8022f2 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881249b9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7019ad56c0 CR3: 00000000336ea000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> drv_set_tsf+0x223/0x590 net/mac80211/driver-ops.c:277 ieee80211_if_parse_tsf+0x2c8/0x560 net/mac80211/debugfs_netdev.c:701 wiphy_locked_debugfs_write_work+0xe3/0x1c0 net/wireless/debugfs.c:215 cfg80211_wiphy_work+0x3dc/0x550 net/wireless/core.c:435 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mac80211_hwsim_set_tsf+0x139/0x170 drivers/net/wireless/virtual/mac80211_hwsim.c:1239 Code: 48 89 9d 30 3f 00 00 4c 89 b5 28 3f 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc e8 9f cf c4 fa 45 89 ff 4c 89 e8 31 d2 <49> f7 f7 4d 29 ee 48 89 d3 48 f7 db eb a5 e8 54 40 29 fb e9 e7 fe RSP: 0018:ffffc90003ff7ad8 EFLAGS: 00010246 RAX: 00063249cd8022f2 RBX: 00063249cd8022f3 RCX: ffffffff86f66d11 RDX: 0000000000000000 RSI: ffffffff86f66d71 RDI: 0000000000000006 RBP: ffff8880236830a0 R08: 0000000000000006 R09: 0000000000000001 R10: 00063249cd8022f3 R11: 0000000000000000 R12: 0000000000000001 R13: 00063249cd8022f2 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881249b9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7019ad56c0 CR3: 0000000034a5e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 89 9d 30 3f 00 00 mov %rbx,0x3f30(%rbp) 7: 4c 89 b5 28 3f 00 00 mov %r14,0x3f28(%rbp) e: 5b pop %rbx f: 5d pop %rbp 10: 41 5c pop %r12 12: 41 5d pop %r13 14: 41 5e pop %r14 16: 41 5f pop %r15 18: c3 ret 19: cc int3 1a: cc int3 1b: cc int3 1c: cc int3 1d: e8 9f cf c4 fa call 0xfac4cfc1 22: 45 89 ff mov %r15d,%r15d 25: 4c 89 e8 mov %r13,%rax 28: 31 d2 xor %edx,%edx * 2a: 49 f7 f7 div %r15 <-- trapping instruction 2d: 4d 29 ee sub %r13,%r14 30: 48 89 d3 mov %rdx,%rbx 33: 48 f7 db neg %rbx 36: eb a5 jmp 0xffffffdd 38: e8 54 40 29 fb call 0xfb294091 3d: e9 .byte 0xe9 3e: e7 fe out %eax,$0xfe --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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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