================================================================================
UBSAN: Undefined behaviour in net/core/gen_estimator.c:83:38
shift exponent -1 is negative
CPU: 0 PID: 10355 Comm: syz-executor.2 Not tainted 5.3.0-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+0x86/0xca lib/dump_stack.c:113
 ubsan_epilogue+0xd/0x3a lib/ubsan.c:158
 __ubsan_handle_shift_out_of_bounds.cold.14+0x21/0x68 lib/ubsan.c:404
 est_timer.cold.0+0x158/0x206 net/core/gen_estimator.c:83
 call_timer_fn+0x169/0x5b0 kernel/time/timer.c:1322
 expire_timers+0x2b9/0x420 kernel/time/timer.c:1366
 __run_timers kernel/time/timer.c:1685 [inline]
 run_timer_softirq+0x219/0x630 kernel/time/timer.c:1698
 __do_softirq+0x251/0xa63 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x170/0x1a0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:537 [inline]
 smp_apic_timer_interrupt+0x1d5/0x6a0 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline]
RIP: 0010:__close_fd+0x22/0x1b0 fs/file.c:627
Code: ff eb c8 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 4c 8d b7 c0 00 00 00 41 55 41 89 f5 41 54 53 48 89 fb 4c 89 f7 e8 1e 0a 83 06 <48> 8d 7b 50 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80
RSP: 0018:ffff88807d21feb8 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13
RAX: ffffffff81ae1342 RBX: ffff88809bc08000 RCX: ffffffff8151e353
RDX: 1ffff1101378101a RSI: 0000000000000004 RDI: ffff88807d21fe20
RBP: ffff88807d21fee0 R08: 0000000000000004 R09: ffffed100fa43fc4
R10: ffffed100fa43fc4 R11: 0000000000000003 R12: ffff88807d21ff58
R13: 000000000000001b R14: ffff88809bc080c0 R15: 0000000000000000
 __do_sys_close fs/open.c:1185 [inline]
 __se_sys_close+0x3f/0x80 fs/open.c:1183
 __x64_sys_close+0x2c/0x40 fs/open.c:1183
 do_syscall_64+0x96/0x450 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x417aa1
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 a4 1a 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffcadcc3670 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 000000000000001c RCX: 0000000000417aa1
RDX: fffffffffffffff7 RSI: 0000000000000081 RDI: 000000000000001b
RBP: 0000000000000000 R08: 00000000011a08d0 R09: 0000000000000000
R10: 00007ffcadcc3590 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffcadcc36b0 R14: 00007ffcadcc36c0 R15: 0000000000000001
================================================================================
================================================================================
UBSAN: Undefined behaviour in net/core/gen_estimator.c:86:46
shift exponent -1 is negative
CPU: 0 PID: 10355 Comm: syz-executor.2 Not tainted 5.3.0-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+0x86/0xca lib/dump_stack.c:113
 ubsan_epilogue+0xd/0x3a lib/ubsan.c:158
 __ubsan_handle_shift_out_of_bounds.cold.14+0x21/0x68 lib/ubsan.c:404
 est_timer.cold.0+0x72/0x206 net/core/gen_estimator.c:86
 call_timer_fn+0x169/0x5b0 kernel/time/timer.c:1322
 expire_timers+0x2b9/0x420 kernel/time/timer.c:1366
 __run_timers kernel/time/timer.c:1685 [inline]
 run_timer_softirq+0x219/0x630 kernel/time/timer.c:1698
 __do_softirq+0x251/0xa63 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x170/0x1a0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:537 [inline]
 smp_apic_timer_interrupt+0x1d5/0x6a0 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline]
RIP: 0010:__close_fd+0x22/0x1b0 fs/file.c:627
Code: ff eb c8 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 4c 8d b7 c0 00 00 00 41 55 41 89 f5 41 54 53 48 89 fb 4c 89 f7 e8 1e 0a 83 06 <48> 8d 7b 50 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80
RSP: 0018:ffff88807d21feb8 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13
RAX: ffffffff81ae1342 RBX: ffff88809bc08000 RCX: ffffffff8151e353
RDX: 1ffff1101378101a RSI: 0000000000000004 RDI: ffff88807d21fe20
RBP: ffff88807d21fee0 R08: 0000000000000004 R09: ffffed100fa43fc4
R10: ffffed100fa43fc4 R11: 0000000000000003 R12: ffff88807d21ff58
R13: 000000000000001b R14: ffff88809bc080c0 R15: 0000000000000000
 __do_sys_close fs/open.c:1185 [inline]
 __se_sys_close+0x3f/0x80 fs/open.c:1183
 __x64_sys_close+0x2c/0x40 fs/open.c:1183
 do_syscall_64+0x96/0x450 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x417aa1
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 a4 1a 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffcadcc3670 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 000000000000001c RCX: 0000000000417aa1
RDX: fffffffffffffff7 RSI: 0000000000000081 RDI: 000000000000001b
RBP: 0000000000000000 R08: 00000000011a08d0 R09: 0000000000000000
R10: 00007ffcadcc3590 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffcadcc36b0 R14: 00007ffcadcc36c0 R15: 0000000000000001
================================================================================