[ 251.796686][ T34] ===================================================== [ 251.804282][ T34] BUG: KMSAN: uninit-value in irqentry_exit_to_kernel_mode_preempt+0xb0/0xc0 [ 251.813335][ T34] irqentry_exit_to_kernel_mode_preempt+0xb0/0xc0 [ 251.820206][ T34] irqentry_exit+0x7b/0x760 [ 251.825056][ T34] sysvec_apic_timer_interrupt+0x52/0x90 [ 251.831043][ T34] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 251.837461][ T34] ip_fast_csum+0x21e/0x3f0 [ 251.842149][ T34] nsim_dev_trap_report_work+0x8c0/0x1430 [ 251.848588][ T34] process_scheduled_works+0xb65/0x1e40 [ 251.854337][ T34] worker_thread+0xee4/0x1590 [ 251.859293][ T34] kthread+0x53f/0x600 [ 251.863580][ T34] ret_from_fork+0x20f/0x8d0 [ 251.868419][ T34] ret_from_fork_asm+0x1a/0x30 [ 251.873807][ T34] [ 251.876208][ T34] Uninit was created at: [ 251.881089][ T34] __kmalloc_node_track_caller_noprof+0x4f6/0x1750 [ 251.888016][ T34] __alloc_skb+0x90d/0x1190 [ 251.893233][ T34] nsim_dev_trap_report_work+0x3f2/0x1430 [ 251.899516][ T34] process_scheduled_works+0xb65/0x1e40 [ 251.905425][ T34] worker_thread+0xee4/0x1590 [ 251.910475][ T34] kthread+0x53f/0x600 [ 251.914676][ T34] ret_from_fork+0x20f/0x8d0 [ 251.919815][ T34] ret_from_fork_asm+0x1a/0x30 [ 251.924953][ T34] [ 251.927918][ T34] CPU: 1 UID: 0 PID: 34 Comm: kworker/u8:2 Not tainted syzkaller #0 PREEMPT(full) [ 251.937887][ T34] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 251.948443][ T34] Workqueue: events_unbound nsim_dev_trap_report_work [ 251.955667][ T34] ===================================================== [ 251.962758][ T34] Disabling lock debugging due to kernel taint [ 251.969159][ T34] Kernel panic - not syncing: kmsan.panic set ... [ 251.976192][ T34] CPU: 1 UID: 0 PID: 34 Comm: kworker/u8:2 Tainted: G B syzkaller #0 PREEMPT(full) [ 251.987727][ T34] Tainted: [B]=BAD_PAGE [ 251.991978][ T34] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 252.002420][ T34] Workqueue: events_unbound nsim_dev_trap_report_work [ 252.009903][ T34] Call Trace: [ 252.013576][ T34] [ 252.016668][ T34] __dump_stack+0x26/0x30 [ 252.021241][ T34] dump_stack_lvl+0x50/0x1c0 [ 252.026058][ T34] ? dump_stack+0x12/0x25 [ 252.030687][ T34] dump_stack+0x1e/0x25 [ 252.035060][ T34] vpanic+0x7b4/0x1430 [ 252.039935][ T34] panic+0x15d/0x160 [ 252.044018][ T34] kmsan_report+0x31a/0x320 [ 252.048887][ T34] ? __msan_warning+0x1b/0x30 [ 252.053810][ T34] ? irqentry_exit_to_kernel_mode_preempt+0xb0/0xc0 [ 252.060657][ T34] ? irqentry_exit+0x7b/0x760 [ 252.065475][ T34] ? sysvec_apic_timer_interrupt+0x52/0x90 [ 252.071785][ T34] ? asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 252.078392][ T34] ? ip_fast_csum+0x21e/0x3f0 [ 252.083289][ T34] ? nsim_dev_trap_report_work+0x8c0/0x1430 [ 252.089376][ T34] ? process_scheduled_works+0xb65/0x1e40 [ 252.095355][ T34] ? worker_thread+0xee4/0x1590 [ 252.100436][ T34] ? kthread+0x53f/0x600 [ 252.104881][ T34] ? ret_from_fork+0x20f/0x8d0 [ 252.110114][ T34] ? ret_from_fork_asm+0x1a/0x30 [ 252.115516][ T34] ? kmsan_get_metadata+0xf1/0x160 [ 252.120901][ T34] ? kmsan_internal_set_shadow_origin+0x7a/0x110 [ 252.127711][ T34] ? kmsan_get_metadata+0xf1/0x160 [ 252.133261][ T34] ? kmsan_get_metadata+0xf1/0x160 [ 252.138665][ T34] ? kmsan_get_metadata+0xf1/0x160 [ 252.144346][ T34] __msan_warning+0x1b/0x30 [ 252.149288][ T34] irqentry_exit_to_kernel_mode_preempt+0xb0/0xc0 [ 252.156235][ T34] irqentry_exit+0x7b/0x760 [ 252.161050][ T34] ? kmsan_internal_set_shadow_origin+0x7a/0x110 [ 252.167586][ T34] ? kmsan_internal_unpoison_memory+0x14/0x20 [ 252.173934][ T34] sysvec_apic_timer_interrupt+0x52/0x90 [ 252.179805][ T34] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 252.186215][ T34] RIP: 0010:ip_fast_csum+0x21e/0x3f0 [ 252.191993][ T34] Code: a8 41 09 c7 85 c0 8b 5d bc 41 0f 44 dd 44 8b 6d d4 44 03 6d c0 45 09 e7 45 85 e4 0f 45 da 48 89 4d c8 48 8d 41 04 48 89 45 88 <31> c0 45 01 f5 0f 92 c0 89 45 c0 48 8b 45 98 44 89 20 89 90 88 0c [ 252.212483][ T34] RSP: 0018:ffff888101ee7a30 EFLAGS: 00000246 [ 252.218945][ T34] RAX: ffff888041eec01c RBX: 0000000007d8014b RCX: ffff888041eec018 [ 252.227137][ T34] RDX: 0000000007d8014b RSI: 0000000000000001 RDI: ffff888041eec018 [ 252.235739][ T34] RBP: ffff888101ee7aa8 R08: ffffea000000000f R09: 0000000000000003 [ 252.243838][ T34] R10: 000000000000002e R11: 0000000000000000 R12: 0000000000000000 [ 252.251989][ T34] R13: 000000004794b045 R14: 0000000000c00000 R15: 00000000ffffff01 [ 252.260561][ T34] nsim_dev_trap_report_work+0x8c0/0x1430 [ 252.266601][ T34] ? __pfx_nsim_dev_trap_report_work+0x10/0x10 [ 252.273284][ T34] process_scheduled_works+0xb65/0x1e40 [ 252.279372][ T34] worker_thread+0xee4/0x1590 [ 252.284522][ T34] kthread+0x53f/0x600 [ 252.288708][ T34] ? __pfx_worker_thread+0x10/0x10 [ 252.293989][ T34] ? __pfx_kthread+0x10/0x10 [ 252.298696][ T34] ret_from_fork+0x20f/0x8d0 [ 252.303527][ T34] ? __switch_to+0x573/0x7a0 [ 252.308588][ T34] ? __pfx_kthread+0x10/0x10 [ 252.313641][ T34] ret_from_fork_asm+0x1a/0x30 [ 252.318594][ T34] [ 252.322612][ T34] Kernel Offset: disabled [ 252.327182][ T34] Rebooting in 86400 seconds..