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UBSAN: shift-out-of-bounds in net/core/gen_estimator.c:83:38
shift exponent -2 is negative
CPU: 1 PID: 27768 Comm: syz-executor.0 Not tainted 5.10.0-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: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+0x6f6/0xb10 kernel/time/timer.c:1731
 run_timer_softirq+0x7d/0x140 kernel/time/timer.c:1744
 __do_softirq+0x2cb/0xad5 kernel/softirq.c:298
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __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:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x18a/0x1b0 kernel/softirq.c:435
 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:on_stack arch/x86/include/asm/stacktrace.h:48 [inline]
RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:342 [inline]
RIP: 0010:deref_stack_reg+0x0/0x150 arch/x86/kernel/unwind_orc.c:352
Code: 14 24 e9 7b ff ff ff 48 89 14 24 e8 5a c3 87 00 48 8b 14 24 e9 48 ff ff ff 48 89 0c 24 e8 48 c3 87 00 48 8b 0c 24 eb 9d 66 90 <48> b8 00 00 00 00 00 fc ff df 41 55 41 54 49 89 fc 55 48 89 f5 53
RSP: 0018:ffffc90009a4f258 EFLAGS: 00000246
RAX: ffffc90009a4ff48 RBX: 1ffff92001349e56 RCX: ffffffff8e88e619
RDX: ffffc90009a4f390 RSI: ffffc90009a4ff40 RDI: ffffc90009a4f348
RBP: 0000000000000001 R08: ffffffff8e88e614 R09: ffffffff8e88e618
R10: fffff52001349e74 R11: 0000000000000001 R12: ffffc90009a4f390
R13: ffffc90009a4f37d R14: ffffc90009a4f398 R15: ffffc90009a4f348
 unwind_next_frame+0xcbc/0x2610 arch/x86/kernel/unwind_orc.c:531
 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:461
 slab_post_alloc_hook mm/slab.h:512 [inline]
 slab_alloc_node mm/slub.c:2889 [inline]
 slab_alloc mm/slub.c:2897 [inline]
 kmem_cache_alloc+0x145/0x350 mm/slub.c:2902
 kmem_cache_zalloc include/linux/slab.h:672 [inline]
 __kernfs_new_node+0xd4/0x8f0 fs/kernfs/dir.c:626
 kernfs_new_node+0x93/0x120 fs/kernfs/dir.c:688
 __kernfs_create_file+0x51/0x350 fs/kernfs/file.c:1002
 sysfs_add_file_mode_ns+0x226/0x540 fs/sysfs/file.c:306
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x328/0xb90 fs/sysfs/group.c:149
 add_port drivers/infiniband/core/sysfs.c:1122 [inline]
 ib_setup_port_attrs+0x95b/0x1540 drivers/infiniband/core/sysfs.c:1367
 add_one_compat_dev+0x4cb/0x820 drivers/infiniband/core/device.c:917
 rdma_dev_init_net+0x33a/0x4d0 drivers/infiniband/core/device.c:1133
 ops_init+0xaf/0x4a0 net/core/net_namespace.c:152
 setup_net+0x2de/0x850 net/core/net_namespace.c:342
 copy_net_ns+0x376/0x7b0 net/core/net_namespace.c:483
 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xbd/0x230 kernel/nsproxy.c:226
 ksys_unshare+0x445/0x8e0 kernel/fork.c:2957
 __do_sys_unshare kernel/fork.c:3025 [inline]
 __se_sys_unshare kernel/fork.c:3023 [inline]
 __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3023
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f61699b6c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000045e219
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000044040000
RBP: 000000000119c058 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034
R13: 00007ffd314ead2f R14: 00007f61699b79c0 R15: 000000000119c034
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