------------[ cut here ]------------ WARNING: CPU: 1 PID: 4582 at net/mac80211/tx.c:4944 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline] WARNING: CPU: 1 PID: 4582 at net/mac80211/tx.c:4944 __ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5265 Modules linked in: CPU: 1 PID: 4582 Comm: syz.4.81 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline] RIP: 0010:__ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5265 Code: ff ff ff e8 30 36 e4 f7 0f 0b 48 8b 7c 24 20 e8 d4 a4 7f fe e9 dd e9 ff ff e8 1a 36 e4 f7 0f 0b e9 f1 ee ff ff e8 0e 36 e4 f7 <0f> 0b e9 61 f2 ff ff e8 02 36 e4 f7 48 c7 c7 f0 7e fa 8d 4c 89 f6 RSP: 0018:ffffc900001e08a0 EFLAGS: 00010246 RAX: ffffffff899c9a82 RBX: 0000000000000000 RCX: ffff88802d8b5940 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900001e0aa8 R08: ffff88802d8b5940 R09: 0000000000000003 R10: 0000000000000007 R11: 0000000000000100 R12: 1ffff9200003c12c R13: dffffc0000000000 R14: ffff888059182258 R15: ffff888026e22e00 FS: 000055556cf72500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f863fff CR3: 0000000072dd7000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_beacon_get_tim+0x5b/0x4d0 net/mac80211/tx.c:5352 ieee80211_beacon_get include/net/mac80211.h:5264 [inline] mac80211_hwsim_beacon_tx+0x21c/0xae0 drivers/net/wireless/mac80211_hwsim.c:2091 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:788 ieee80211_iterate_active_interfaces_atomic+0xd7/0x170 net/mac80211/util.c:824 mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147 __run_hrtimer kernel/time/hrtimer.c:1752 [inline] __hrtimer_run_queues+0x554/0xd60 kernel/time/hrtimer.c:1816 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1833 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:shmem_add_to_page_cache+0x9e7/0x1c00 include/linux/swap.h:-1 Code: bf db 13 00 89 de 81 e6 ff 0f 00 00 31 ff 48 89 b4 24 80 00 00 00 e8 08 5b cb ff 48 8d 43 48 48 8d 53 51 49 81 c6 a8 01 00 00 <49> bd fc ff ff ff 03 00 00 00 4c 89 74 24 60 49 c1 ee 03 4c 89 74 RSP: 0018:ffffc9000397f580 EFLAGS: 00000296 RAX: ffffea0001492d08 RBX: ffffea0001492cc0 RCX: ffff88802d8b5940 RDX: ffffea0001492d11 RSI: 0000000000000cc0 RDI: 0000000000000000 RBP: ffffc9000397f6f0 R08: dffffc0000000000 R09: fffffbfff1c3eea6 R10: fffffbfff1c3eea6 R11: 1ffffffff1c3eea5 R12: 0000000000000cc0 R13: dffffc0000000000 R14: ffff88805c87e3c0 R15: 0000000000000000 shmem_get_folio_gfp+0x158b/0x3400 mm/shmem.c:1971 shmem_fault+0x1be/0x7b0 mm/shmem.c:2156 __do_fault+0x13b/0x4e0 mm/memory.c:4280 do_read_fault mm/memory.c:4631 [inline] do_fault mm/memory.c:4760 [inline] handle_pte_fault mm/memory.c:5031 [inline] __handle_mm_fault mm/memory.c:5173 [inline] handle_mm_fault+0x28ca/0x3e70 mm/memory.c:5294 faultin_page mm/gup.c:1026 [inline] __get_user_pages+0x3ff/0xeb0 mm/gup.c:1250 populate_vma_page_range+0x214/0x2b0 mm/gup.c:1607 __mm_populate+0x248/0x370 mm/gup.c:1721 mm_populate include/linux/mm.h:2837 [inline] vm_mmap_pgoff+0x203/0x2b0 mm/util.c:525 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fde0af8eba9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffedfc87378 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fde0b1d5fa0 RCX: 00007fde0af8eba9 RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000 RBP: 00007fde0b011e19 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fde0b1d5fa0 R14: 00007fde0b1d5fa0 R15: 0000000000000006 ---------------- Code disassembly (best guess): 0: bf db 13 00 89 mov $0x890013db,%edi 5: de 81 e6 ff 0f 00 fiadds 0xfffe6(%rcx) b: 00 31 add %dh,(%rcx) d: ff 48 89 decl -0x77(%rax) 10: b4 24 mov $0x24,%ah 12: 80 00 00 addb $0x0,(%rax) 15: 00 e8 add %ch,%al 17: 08 5b cb or %bl,-0x35(%rbx) 1a: ff 48 8d decl -0x73(%rax) 1d: 43 rex.XB 1e: 48 rex.W 1f: 48 8d 53 51 lea 0x51(%rbx),%rdx 23: 49 81 c6 a8 01 00 00 add $0x1a8,%r14 * 2a: 49 bd fc ff ff ff 03 movabs $0x3fffffffc,%r13 <-- trapping instruction 31: 00 00 00 34: 4c 89 74 24 60 mov %r14,0x60(%rsp) 39: 49 c1 ee 03 shr $0x3,%r14 3d: 4c rex.WR 3e: 89 .byte 0x89 3f: 74 .byte 0x74