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BUG: KMSAN: uninit-value in slab_alloc_node mm/slub.c:2749 [inline]
BUG: KMSAN: uninit-value in kmem_cache_alloc_node+0x5d0/0xe70 mm/slub.c:2828
CPU: 0 PID: 11782 Comm: syz-fuzzer Not tainted 5.3.0-rc3+ #17
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+0x191/0x1f0 lib/dump_stack.c:113
 kmsan_report+0x162/0x2d0 mm/kmsan/kmsan_report.c:109
 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:294
 slab_alloc_node mm/slub.c:2749 [inline]
 kmem_cache_alloc_node+0x5d0/0xe70 mm/slub.c:2828
 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197
 alloc_skb include/linux/skbuff.h:1056 [inline]
 new_skb drivers/block/aoe/aoecmd.c:67 [inline]
 aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:426 [inline]
 aoecmd_cfg+0x205/0xa80 drivers/block/aoe/aoecmd.c:1372
 discover_timer+0x86/0xa0 drivers/block/aoe/aoemain.c:24
 call_timer_fn+0x232/0x530 kernel/time/timer.c:1322
 expire_timers kernel/time/timer.c:1366 [inline]
 __run_timers+0xcdc/0x11a0 kernel/time/timer.c:1685
 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1698
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:375 [inline]
 irq_exit+0x230/0x280 kernel/softirq.c:416
 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:537
 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1097
 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:835
 </IRQ>
RIP: 0010:kmsan_get_shadow_origin_ptr+0x60/0x3a0 mm/kmsan/kmsan.c:723
Code: 3d 64 b3 26 0e 00 74 0b 65 8b 05 5f d7 fe 7d 85 c0 74 18 49 89 dc 4c 89 e0 48 89 da 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d <c3> 4c 89 f7 4c 89 fe 31 d2 e8 12 d6 ff ff 84 c0 0f 84 17 03 00 00
RSP: 0018:ffff8880ba30f6b0 EFLAGS: 00000292 ORIG_RAX: ffffffffffffff13
RAX: ffff8880b643f738 RBX: 0000000000000001 RCX: ccccccccccccd000
RDX: ffff8880b323f738 RSI: ffffea00038f53b0 RDI: ffff8880ba30f738
RBP: ffff8880ba30f6b8 R08: ffffea000000000f R09: ffff88812fffb000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88811376c620 R14: ffff8880ba30f738 R15: 0000000000000000
 unwind_done arch/x86/include/asm/unwind.h:46 [inline]
 unwind_get_return_address+0x36/0x130 arch/x86/kernel/unwind_frame.c:16
 arch_stack_walk+0x29a/0x3e0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x11c/0x1b0 kernel/stacktrace.c:123
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:187 [inline]
 kmsan_internal_chain_origin+0xcc/0x150 mm/kmsan/kmsan.c:345
 kmsan_memcpy_memmove_metadata+0x819/0xa80 mm/kmsan/kmsan.c:278
 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:298
 __msan_memcpy+0x56/0x70 mm/kmsan/kmsan_instr.c:129
 sock_read_iter+0x47c/0x660 net/socket.c:968
 call_read_iter include/linux/fs.h:1864 [inline]
 new_sync_read fs/read_write.c:414 [inline]
 __vfs_read+0xa67/0xc90 fs/read_write.c:427
 vfs_read+0x359/0x6f0 fs/read_write.c:461
 ksys_read+0x265/0x430 fs/read_write.c:587
 __do_sys_read fs/read_write.c:597 [inline]
 __se_sys_read+0x92/0xb0 fs/read_write.c:595
 __x64_sys_read+0x4a/0x70 fs/read_write.c:595
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x47fcb4
Code: ff ff cc cc cc cc e8 2b 41 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 45 31 d2 45 31 c0 45 31 c9 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30
RSP: 002b:000000c420393760 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcb4
RDX: 0000000000001000 RSI: 000000c4202f0000 RDI: 0000000000000003
RBP: 000000c4203937b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 0000000000000008 R14: 0000000000000002 R15: ffffffffffffffff

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:187 [inline]
 kmsan_internal_chain_origin+0xcc/0x150 mm/kmsan/kmsan.c:345
 __msan_chain_origin+0x6b/0xe0 mm/kmsan/kmsan_instr.c:190
 ___slab_alloc+0x1dbc/0x1fb0 mm/slub.c:2634
 __slab_alloc mm/slub.c:2687 [inline]
 slab_alloc_node mm/slub.c:2750 [inline]
 kmem_cache_alloc_node+0x769/0xe70 mm/slub.c:2828
 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197
 alloc_skb include/linux/skbuff.h:1056 [inline]
 new_skb drivers/block/aoe/aoecmd.c:67 [inline]
 aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:426 [inline]
 aoecmd_cfg+0x205/0xa80 drivers/block/aoe/aoecmd.c:1372
 discover_timer+0x86/0xa0 drivers/block/aoe/aoemain.c:24
 call_timer_fn+0x232/0x530 kernel/time/timer.c:1322
 expire_timers kernel/time/timer.c:1366 [inline]
 __run_timers+0xcdc/0x11a0 kernel/time/timer.c:1685
 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1698
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:375 [inline]
 irq_exit+0x230/0x280 kernel/softirq.c:416
 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:537
 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1097
 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:835
 kmsan_get_shadow_origin_ptr+0x60/0x3a0 mm/kmsan/kmsan.c:723
 unwind_done arch/x86/include/asm/unwind.h:46 [inline]
 unwind_get_return_address+0x36/0x130 arch/x86/kernel/unwind_frame.c:16
 arch_stack_walk+0x29a/0x3e0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x11c/0x1b0 kernel/stacktrace.c:123
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:187 [inline]
 kmsan_internal_chain_origin+0xcc/0x150 mm/kmsan/kmsan.c:345
 kmsan_memcpy_memmove_metadata+0x819/0xa80 mm/kmsan/kmsan.c:278
 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:298
 __msan_memcpy+0x56/0x70 mm/kmsan/kmsan_instr.c:129
 sock_read_iter+0x47c/0x660 net/socket.c:968
 call_read_iter include/linux/fs.h:1864 [inline]
 new_sync_read fs/read_write.c:414 [inline]
 __vfs_read+0xa67/0xc90 fs/read_write.c:427
 vfs_read+0x359/0x6f0 fs/read_write.c:461
 ksys_read+0x265/0x430 fs/read_write.c:587
 __do_sys_read fs/read_write.c:597 [inline]
 __se_sys_read+0x92/0xb0 fs/read_write.c:595
 __x64_sys_read+0x4a/0x70 fs/read_write.c:595
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x63/0xe7

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:187 [inline]
 kmsan_internal_poison_shadow+0x53/0xa0 mm/kmsan/kmsan.c:146
 kmsan_slab_free+0x8d/0x100 mm/kmsan/kmsan_hooks.c:195
 slab_free_freelist_hook mm/slub.c:1472 [inline]
 slab_free mm/slub.c:3038 [inline]
 kmem_cache_free_bulk+0x3ad9/0x3f50 mm/slub.c:3163
 __kfree_skb_flush+0xb0/0x100 net/core/skbuff.c:862
 net_rx_action+0x1908/0x1950 net/core/dev.c:6436
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:375 [inline]
 irq_exit+0x230/0x280 kernel/softirq.c:416
 exiting_irq arch/x86/include/asm/apic.h:537 [inline]
 do_IRQ+0x20d/0x3a0 arch/x86/kernel/irq.c:259
 ret_from_intr+0x0/0x33
 native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
 arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
 default_idle+0x53/0x90 arch/x86/kernel/process.c:580
 arch_cpu_idle+0x25/0x30 arch/x86/kernel/process.c:571
 default_idle_call kernel/sched/idle.c:94 [inline]
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x1d7/0x790 kernel/sched/idle.c:263
 cpu_startup_entry+0x45/0x50 kernel/sched/idle.c:354
 rest_init+0x1be/0x1f0 init/main.c:452
 arch_call_rest_init+0x13/0x15
 start_kernel+0x991/0xb61 init/main.c:788
 x86_64_start_reservations+0x18/0x2e arch/x86/kernel/head64.c:472
 x86_64_start_kernel+0x81/0x84 arch/x86/kernel/head64.c:453
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241
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