================================================================== 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: 12801 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: __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 RIP: 0010:kmsan_slab_alloc+0xd5/0x120 mm/kmsan/kmsan_hooks.c:178 Code: 0a ba 01 00 00 00 e8 da ce ff ff 65 ff 0d 27 bf fe 7d 65 8b 05 20 bf fe 7d 85 c0 75 30 e8 43 fc 37 ff 4c 89 65 c8 ff 75 c8 9d <65> 48 8b 04 25 28 00 00 00 48 3b 45 d8 75 0d 48 83 c4 18 5b 41 5c RSP: 0018:ffff8880ae24f4f8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff88810985d800 RCX: 0000000000000039 RDX: 0000000000000038 RSI: ffffd0ffffffffff RDI: ffff88810985d8e0 RBP: ffff8880ae24f530 R08: ffffea000000000f R09: ffff88812fffb000 R10: 0000000000000011 R11: ffffffff8182bd40 R12: 0000000000000246 R13: ffffffffffffff00 R14: 0000000000002a20 R15: ffff88812d594e00 slab_alloc_node mm/slub.c:2790 [inline] kmem_cache_alloc_node+0x8f8/0xe70 mm/slub.c:2828 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197 alloc_skb include/linux/skbuff.h:1056 [inline] __tcp_send_ack+0xfb/0x840 net/ipv4/tcp_output.c:3660 tcp_send_ack+0x68/0x90 net/ipv4/tcp_output.c:3687 tcp_cleanup_rbuf+0x764/0x800 net/ipv4/tcp.c:1562 tcp_recvmsg+0x334d/0x4ff0 net/ipv4/tcp.c:2166 inet_recvmsg+0x237/0x7d0 net/ipv4/af_inet.c:838 sock_recvmsg_nosec net/socket.c:871 [inline] sock_recvmsg net/socket.c:889 [inline] sock_read_iter+0x5be/0x660 net/socket.c:967 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:000000c4201bb760 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcb4 RDX: 0000000000001000 RSI: 000000c4203cc000 RDI: 0000000000000003 RBP: 000000c4201bb7b0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 0000000000000004 R14: 0000000000000020 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 native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline] arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline] kmsan_slab_alloc+0xd5/0x120 mm/kmsan/kmsan_hooks.c:178 slab_alloc_node mm/slub.c:2790 [inline] kmem_cache_alloc_node+0x8f8/0xe70 mm/slub.c:2828 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197 alloc_skb include/linux/skbuff.h:1056 [inline] __tcp_send_ack+0xfb/0x840 net/ipv4/tcp_output.c:3660 tcp_send_ack+0x68/0x90 net/ipv4/tcp_output.c:3687 tcp_cleanup_rbuf+0x764/0x800 net/ipv4/tcp.c:1562 tcp_recvmsg+0x334d/0x4ff0 net/ipv4/tcp.c:2166 inet_recvmsg+0x237/0x7d0 net/ipv4/af_inet.c:838 sock_recvmsg_nosec net/socket.c:871 [inline] sock_recvmsg net/socket.c:889 [inline] sock_read_iter+0x5be/0x660 net/socket.c:967 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 ==================================================================