================================================================================ UBSAN: shift-out-of-bounds in net/core/gen_estimator.c:83:38 shift exponent -118 is negative CPU: 1 PID: 15793 Comm: systemd-udevd Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 ubsan_epilogue+0xb/0x5a lib/ubsan.c:148 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:395 est_timer.cold+0xbb/0x12d net/core/gen_estimator.c:83 call_timer_fn+0x1a5/0x710 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x692/0xa80 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744 __do_softirq+0x2bc/0xa77 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu+0x17f/0x200 kernel/softirq.c:420 irq_exit_rcu+0x5/0x20 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:debug_lockdep_rcu_enabled+0x6/0x30 kernel/rcu/update.c:278 Code: 00 00 00 00 0f 1f 44 00 00 65 81 05 60 87 e7 76 00 00 00 f0 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 8b 05 8e a1 63 04 <85> c0 74 21 8b 05 5c d2 63 04 85 c0 74 17 65 48 8b 04 25 00 f0 01 RSP: 0018:ffffc900024b78f0 EFLAGS: 00000246 RAX: 0000000000000002 RBX: 1ffff92000496f23 RCX: ffffffff8158eb08 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff8d7e3ac8 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8d7e3acf R10: fffffbfff1afc759 R11: 0000000000000001 R12: 0000000000000001 R13: ffffffff8b8ec1c0 R14: 0000000000000000 R15: 0000000000000000 rcu_read_lock_held_common kernel/rcu/update.c:102 [inline] rcu_read_lock_sched_held+0xd/0x70 kernel/rcu/update.c:121 trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x5d3/0x750 kernel/locking/lockdep.c:5408 fs_reclaim_acquire mm/page_alloc.c:4336 [inline] fs_reclaim_acquire+0xd2/0x150 mm/page_alloc.c:4327 might_alloc include/linux/sched/mm.h:193 [inline] slab_pre_alloc_hook mm/slab.h:493 [inline] slab_alloc mm/slab.c:3301 [inline] kmem_cache_alloc+0x36/0x3d0 mm/slab.c:3486 kmem_cache_zalloc include/linux/slab.h:672 [inline] lsm_file_alloc security/security.c:569 [inline] security_file_alloc+0x34/0x170 security/security.c:1457 __alloc_file+0xd8/0x280 fs/file_table.c:106 alloc_empty_file+0x6d/0x170 fs/file_table.c:150 path_openat+0x125/0x27a0 fs/namei.c:3355 do_filp_open+0x17e/0x3c0 fs/namei.c:3396 do_sys_openat2+0x16d/0x420 fs/open.c:1172 do_sys_open fs/open.c:1188 [inline] __do_sys_open fs/open.c:1196 [inline] __se_sys_open fs/open.c:1192 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1192 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7ff69f126840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007ffc385930f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00005597006493e8 RCX: 00007ff69f126840 RDX: 0000000000000000 RSI: 0000000000080101 RDI: 00005597006493e8 RBP: 00005597024efa78 R08: 0000000000000020 R09: 0000000000000018 R10: 00007ff69ee602aa R11: 0000000000000246 R12: 00005597006493e6 R13: 0000000000000000 R14: 0000000000000003 R15: 000000000000000e ================================================================================