================================================================== 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: 13726 Comm: syz-executor.2 Not tainted 5.3.0-rc3+ #16 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_free+0xac/0x100 mm/kmsan/kmsan_hooks.c:198 Code: 00 b9 01 00 00 00 e8 93 c9 ff ff 65 ff 0d 30 be fe 7d 65 8b 05 29 be fe 7d 85 c0 75 2e e8 4c fb 37 ff 4c 89 7d d0 ff 75 d0 9d <65> 48 8b 04 25 28 00 00 00 48 3b 45 e0 75 0b 48 83 c4 18 5b 41 5e RSP: 0018:ffff88805337f380 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff88812f8188c0 RCX: 0000000000000017 RDX: 0000000000000016 RSI: ffffd0ffffffffff RDI: ffff88808e7ccfd0 RBP: ffff88805337f3b0 R08: ffffea000000000f R09: ffff88812fffb000 R10: 0000000000000013 R11: ffffffff8182bd40 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88808e7ccf78 R15: 0000000000000246 slab_free_freelist_hook mm/slub.c:1472 [inline] slab_free mm/slub.c:3038 [inline] kmem_cache_free+0x2d1/0x2b70 mm/slub.c:3054 merge_or_add_vmap_area mm/vmalloc.c:746 [inline] __free_vmap_area+0xa10/0x34a0 mm/vmalloc.c:1196 __purge_vmap_area_lazy+0x306/0x470 mm/vmalloc.c:1304 try_purge_vmap_area_lazy mm/vmalloc.c:1321 [inline] free_vmap_area_noflush mm/vmalloc.c:1353 [inline] free_unmap_vmap_area+0x283/0x2c0 mm/vmalloc.c:1366 remove_vm_area mm/vmalloc.c:2176 [inline] vm_remove_mappings mm/vmalloc.c:2201 [inline] __vunmap+0x76f/0x11a0 mm/vmalloc.c:2261 vunmap+0x68/0x90 mm/vmalloc.c:2366 relay_destroy_buf+0xa8/0x440 kernel/relay.c:213 relay_open_buf+0x1178/0x1940 kernel/relay.c:481 relay_open+0x9ea/0x11b0 kernel/relay.c:599 do_blk_trace_setup+0x8d8/0x1330 kernel/trace/blktrace.c:526 __blk_trace_setup kernel/trace/blktrace.c:571 [inline] blk_trace_setup+0x1fd/0x350 kernel/trace/blktrace.c:589 sg_ioctl+0xe12/0x5370 drivers/scsi/sg.c:1112 do_vfs_ioctl+0xea8/0x2c50 fs/ioctl.c:46 ksys_ioctl fs/ioctl.c:713 [inline] __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl+0x1da/0x270 fs/ioctl.c:718 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:718 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x459829 Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007faa296a7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829 RDX: 0000000020000000 RSI: 00000000c0481273 RDI: 0000000000000004 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007faa296a86d4 R13: 00000000004c0ed9 R14: 00000000004d3ff0 R15: 00000000ffffffff 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_free+0xac/0x100 mm/kmsan/kmsan_hooks.c:198 slab_free_freelist_hook mm/slub.c:1472 [inline] slab_free mm/slub.c:3038 [inline] kmem_cache_free+0x2d1/0x2b70 mm/slub.c:3054 merge_or_add_vmap_area mm/vmalloc.c:746 [inline] __free_vmap_area+0xa10/0x34a0 mm/vmalloc.c:1196 __purge_vmap_area_lazy+0x306/0x470 mm/vmalloc.c:1304 try_purge_vmap_area_lazy mm/vmalloc.c:1321 [inline] free_vmap_area_noflush mm/vmalloc.c:1353 [inline] free_unmap_vmap_area+0x283/0x2c0 mm/vmalloc.c:1366 remove_vm_area mm/vmalloc.c:2176 [inline] vm_remove_mappings mm/vmalloc.c:2201 [inline] __vunmap+0x76f/0x11a0 mm/vmalloc.c:2261 vunmap+0x68/0x90 mm/vmalloc.c:2366 relay_destroy_buf+0xa8/0x440 kernel/relay.c:213 relay_open_buf+0x1178/0x1940 kernel/relay.c:481 relay_open+0x9ea/0x11b0 kernel/relay.c:599 do_blk_trace_setup+0x8d8/0x1330 kernel/trace/blktrace.c:526 __blk_trace_setup kernel/trace/blktrace.c:571 [inline] blk_trace_setup+0x1fd/0x350 kernel/trace/blktrace.c:589 sg_ioctl+0xe12/0x5370 drivers/scsi/sg.c:1112 do_vfs_ioctl+0xea8/0x2c50 fs/ioctl.c:46 ksys_ioctl fs/ioctl.c:713 [inline] __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl+0x1da/0x270 fs/ioctl.c:718 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:718 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 ==================================================================