do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82
RIP: 0023:0xf7f64549
=====================================================
BUG: KMSAN: uninit-value in show_opcodes+0x2c1/0x2e0 arch/x86/kernel/dumpstack.c:123
 show_opcodes+0x2c1/0x2e0 arch/x86/kernel/dumpstack.c:123
 show_ip arch/x86/kernel/dumpstack.c:144 [inline]
 show_iret_regs+0xe3/0x230 arch/x86/kernel/dumpstack.c:149
 __show_regs+0x31/0xc90 arch/x86/kernel/process_64.c:74
 show_regs_if_on_stack+0x45e/0x530 arch/x86/kernel/dumpstack.c:167
 show_trace_log_lvl+0x392/0x490 arch/x86/kernel/dumpstack.c:298
 show_stack+0x55/0x60 arch/x86/kernel/dumpstack.c:318
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1c8/0x256 lib/dump_stack.c:106
 dump_stack+0x1a/0x23 lib/dump_stack.c:113
 dump_header+0x155/0x9a0 mm/oom_kill.c:460
 oom_kill_process+0x2e2/0xb30 mm/oom_kill.c:1036
 out_of_memory+0xeb5/0x1220 mm/oom_kill.c:1174
 mem_cgroup_out_of_memory+0x24a/0x3a0 mm/memcontrol.c:1706
 mem_cgroup_oom+0x856/0xa80 mm/memcontrol.c:1936
 try_charge_memcg+0x134f/0x1e20 mm/memcontrol.c:2729
 obj_cgroup_charge_pages+0x2c9/0x690 mm/memcontrol.c:3095
 obj_cgroup_charge+0x239/0x310 mm/memcontrol.c:3385
 memcg_slab_pre_alloc_hook+0x4de/0x900 mm/slab.h:501
 slab_pre_alloc_hook mm/slab.h:715 [inline]
 slab_alloc_node mm/slub.c:3318 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc_lru+0x17e/0xb30 mm/slub.c:3429
 __d_alloc+0x69/0xb00 fs/dcache.c:1769
 d_alloc fs/dcache.c:1849 [inline]
 d_alloc_parallel+0xad/0x2800 fs/dcache.c:2638
 __lookup_slow+0x12e/0x730 fs/namei.c:1670
 lookup_slow+0x6a/0xc0 fs/namei.c:1702
 walk_component+0x462/0x650 fs/namei.c:1993
 lookup_last fs/namei.c:2450 [inline]
 path_lookupat+0x27d/0x6f0 fs/namei.c:2474
 filename_lookup+0x24c/0x800 fs/namei.c:2503
 user_path_at_empty+0x83/0x390 fs/namei.c:2876
 user_path_at include/linux/namei.h:57 [inline]
 ksys_umount fs/namespace.c:1822 [inline]
 __do_sys_umount fs/namespace.c:1830 [inline]
 __se_sys_umount fs/namespace.c:1828 [inline]
 __ia32_sys_umount+0x150/0x260 fs/namespace.c:1828
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Local variable opcodes created at:
 show_opcodes+0x49/0x2e0 arch/x86/kernel/dumpstack.c:118
 show_ip arch/x86/kernel/dumpstack.c:144 [inline]
 show_iret_regs+0xe3/0x230 arch/x86/kernel/dumpstack.c:149

CPU: 1 PID: 3501 Comm: syz-executor.1 Not tainted 6.1.0-rc2-syzkaller-61955-g4a3e741a3d6a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
=====================================================