================================================================================
UBSAN: Undefined behaviour in net/core/gen_estimator.c:87:38
shift exponent -88 is negative
CPU: 1 PID: 6469 Comm: syz-fuzzer Not tainted 4.19.150-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x22c/0x33e lib/dump_stack.c:118
 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161
 __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 lib/ubsan.c:422
 est_timer.cold+0x96/0x126 net/core/gen_estimator.c:87
 call_timer_fn+0x177/0x760 kernel/time/timer.c:1338
 expire_timers+0x243/0x500 kernel/time/timer.c:1375
 __run_timers kernel/time/timer.c:1703 [inline]
 run_timer_softirq+0x259/0x730 kernel/time/timer.c:1716
 __do_softirq+0x27d/0xad2 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x22d/0x270 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 smp_apic_timer_interrupt+0x15f/0x5d0 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
 </IRQ>
RIP: 0033:0x76fc37
Code: 80 01 00 00 48 89 84 24 48 01 00 00 c6 44 24 47 01 48 8b 8c 24 a0 01 00 00 48 89 0c 24 48 8b 9c 24 a8 01 00 00 48 89 5c 24 08 <48> 89 44 24 10 48 8b 94 24 b8 01 00 00 48 8b 32 ff d6 48 8b bc 24
RSP: 002b:000000c015948958 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 000000c024332f80 RBX: 000000c024323960 RCX: 0000000000b46e60
RDX: 000000c0238af970 RSI: 0000000000000017 RDI: 000000c015948ae0
RBP: 000000c015948ae8 R08: 000000c015949050 R09: 000000c024332f80
R10: 0000000000000038 R11: 0000000000000011 R12: 000000c024336390
R13: 000000c00002e088 R14: 0000000000aff3e2 R15: 0000000000000000
================================================================================
================================================================================
UBSAN: Undefined behaviour in net/core/gen_estimator.c:88:23
shift exponent 96 is too large for 64-bit type 'long long unsigned int'
CPU: 1 PID: 6469 Comm: syz-fuzzer Not tainted 4.19.150-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x22c/0x33e lib/dump_stack.c:118
 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161
 __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 lib/ubsan.c:422
 est_timer.cold+0xd6/0x126 net/core/gen_estimator.c:88
 call_timer_fn+0x177/0x760 kernel/time/timer.c:1338
 expire_timers+0x243/0x500 kernel/time/timer.c:1375
 __run_timers kernel/time/timer.c:1703 [inline]
 run_timer_softirq+0x259/0x730 kernel/time/timer.c:1716
 __do_softirq+0x27d/0xad2 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x22d/0x270 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 smp_apic_timer_interrupt+0x15f/0x5d0 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
 </IRQ>
RIP: 0033:0x76fc37
Code: 80 01 00 00 48 89 84 24 48 01 00 00 c6 44 24 47 01 48 8b 8c 24 a0 01 00 00 48 89 0c 24 48 8b 9c 24 a8 01 00 00 48 89 5c 24 08 <48> 89 44 24 10 48 8b 94 24 b8 01 00 00 48 8b 32 ff d6 48 8b bc 24
RSP: 002b:000000c015948958 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 000000c024332f80 RBX: 000000c024323960 RCX: 0000000000b46e60
RDX: 000000c0238af970 RSI: 0000000000000017 RDI: 000000c015948ae0
RBP: 000000c015948ae8 R08: 000000c015949050 R09: 000000c024332f80
R10: 0000000000000038 R11: 0000000000000011 R12: 000000c024336390
R13: 000000c00002e088 R14: 0000000000aff3e2 R15: 0000000000000000
================================================================================
================================================================================
UBSAN: Undefined behaviour in net/core/gen_estimator.c:90:46
shift exponent -88 is negative
CPU: 1 PID: 6469 Comm: syz-fuzzer Not tainted 4.19.150-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x22c/0x33e lib/dump_stack.c:118
 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161
 __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 lib/ubsan.c:422
 est_timer.cold+0x17/0x126 net/core/gen_estimator.c:90
 call_timer_fn+0x177/0x760 kernel/time/timer.c:1338
 expire_timers+0x243/0x500 kernel/time/timer.c:1375
 __run_timers kernel/time/timer.c:1703 [inline]
 run_timer_softirq+0x259/0x730 kernel/time/timer.c:1716
 __do_softirq+0x27d/0xad2 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x22d/0x270 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 smp_apic_timer_interrupt+0x15f/0x5d0 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
 </IRQ>
RIP: 0033:0x76fc37
Code: 80 01 00 00 48 89 84 24 48 01 00 00 c6 44 24 47 01 48 8b 8c 24 a0 01 00 00 48 89 0c 24 48 8b 9c 24 a8 01 00 00 48 89 5c 24 08 <48> 89 44 24 10 48 8b 94 24 b8 01 00 00 48 8b 32 ff d6 48 8b bc 24
RSP: 002b:000000c015948958 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 000000c024332f80 RBX: 000000c024323960 RCX: 0000000000b46e60
RDX: 000000c0238af970 RSI: 0000000000000017 RDI: 000000c015948ae0
RBP: 000000c015948ae8 R08: 000000c015949050 R09: 000000c024332f80
R10: 0000000000000038 R11: 0000000000000011 R12: 000000c024336390
R13: 000000c00002e088 R14: 0000000000aff3e2 R15: 0000000000000000
================================================================================
================================================================================
UBSAN: Undefined behaviour in net/core/gen_estimator.c:91:22
shift exponent 96 is too large for 64-bit type 'long long unsigned int'
CPU: 1 PID: 6469 Comm: syz-fuzzer Not tainted 4.19.150-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x22c/0x33e lib/dump_stack.c:118
 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161
 __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 lib/ubsan.c:422
 est_timer.cold+0x5b/0x126 net/core/gen_estimator.c:91
 call_timer_fn+0x177/0x760 kernel/time/timer.c:1338
 expire_timers+0x243/0x500 kernel/time/timer.c:1375
 __run_timers kernel/time/timer.c:1703 [inline]
 run_timer_softirq+0x259/0x730 kernel/time/timer.c:1716
 __do_softirq+0x27d/0xad2 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x22d/0x270 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 smp_apic_timer_interrupt+0x15f/0x5d0 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
 </IRQ>
RIP: 0033:0x76fc37
Code: 80 01 00 00 48 89 84 24 48 01 00 00 c6 44 24 47 01 48 8b 8c 24 a0 01 00 00 48 89 0c 24 48 8b 9c 24 a8 01 00 00 48 89 5c 24 08 <48> 89 44 24 10 48 8b 94 24 b8 01 00 00 48 8b 32 ff d6 48 8b bc 24
RSP: 002b:000000c015948958 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 000000c024332f80 RBX: 000000c024323960 RCX: 0000000000b46e60
RDX: 000000c0238af970 RSI: 0000000000000017 RDI: 000000c015948ae0
RBP: 000000c015948ae8 R08: 000000c015949050 R09: 000000c024332f80
R10: 0000000000000038 R11: 0000000000000011 R12: 000000c024336390
R13: 000000c00002e088 R14: 0000000000aff3e2 R15: 0000000000000000
================================================================================
EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue