===================================================== BUG: KMSAN: use-after-free in slab_alloc_node mm/slub.c:2762 [inline] BUG: KMSAN: use-after-free in kmem_cache_alloc_node+0x5a9/0xe60 mm/slub.c:2836 CPU: 0 PID: 22657 Comm: blkid Not tainted 5.4.0-rc5+ #0 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+0x128/0x220 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:245 slab_alloc_node mm/slub.c:2762 [inline] kmem_cache_alloc_node+0x5a9/0xe60 mm/slub.c:2836 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197 alloc_skb include/linux/skbuff.h:1050 [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:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0xd60/0x1270 kernel/time/timer.c:1773 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786 __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:536 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1139 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:837 RIP: 0010:kmsan_get_shadow_origin_ptr+0x56/0x4b0 mm/kmsan/kmsan_shadow.c:222 Code: 20 2a 90 84 d2 48 0f 45 d8 80 3d e4 e1 22 0e 00 74 0b 65 8b 05 5f f5 fc 7d 85 c0 74 18 49 89 dd 4c 89 e8 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 d2 RSP: 0018:ffff8881d084f7e8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: ffff8880180a1a30 RBX: ffff8880180a0a30 RCX: ccccccccccccd000 RDX: ffff8880180a0a30 RSI: ffffea0000783250 RDI: 0000000017e3da30 RBP: ffff8881d084f810 R08: 0000000000000000 R09: ffff888106e1f2c8 R10: 00007ffd0ccc6000 R11: ffff888017e3da28 R12: 0000000000000a30 R13: ffff8880180a1a30 R14: 0000000000000a30 R15: 0000000000000008 __msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55 setup_arg_pages+0xf90/0x1570 fs/exec.c:776 load_elf_binary+0x15ae/0x5f10 fs/binfmt_elf.c:865 search_binary_handler+0x2f4/0xac0 fs/exec.c:1659 exec_binprm fs/exec.c:1702 [inline] __do_execve_file+0x2218/0x2e90 fs/exec.c:1822 do_execveat_common fs/exec.c:1868 [inline] do_execve fs/exec.c:1885 [inline] __do_sys_execve fs/exec.c:1961 [inline] __se_sys_execve+0xec/0x110 fs/exec.c:1956 __x64_sys_execve+0x4a/0x70 fs/exec.c:1956 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x7f1f3fa9f207 Code: Bad RIP value. RSP: 002b:00007ffdb31b16c8 EFLAGS: 00000202 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f1f3fa9f207 RDX: 0000000000d18fe0 RSI: 00007ffdb31b17c0 RDI: 00007ffdb31b27d0 RBP: 0000000000625500 R08: 00000000000030c4 R09: 00000000000030c4 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000d18fe0 R13: 0000000000000007 R14: 0000000000d08250 R15: 0000000000000005 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline] kmsan_internal_chain_origin+0xbd/0x180 mm/kmsan/kmsan.c:319 __msan_chain_origin+0x6b/0xd0 mm/kmsan/kmsan_instr.c:179 ___slab_alloc+0x1dbc/0x1fb0 mm/slub.c:2636 __slab_alloc mm/slub.c:2689 [inline] slab_alloc_node mm/slub.c:2763 [inline] kmem_cache_alloc_node+0xaf4/0xe60 mm/slub.c:2836 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197 alloc_skb include/linux/skbuff.h:1050 [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:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0xd60/0x1270 kernel/time/timer.c:1773 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786 __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:536 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1139 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:837 kmsan_get_shadow_origin_ptr+0x56/0x4b0 mm/kmsan/kmsan_shadow.c:222 __msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55 setup_arg_pages+0xf90/0x1570 fs/exec.c:776 load_elf_binary+0x15ae/0x5f10 fs/binfmt_elf.c:865 search_binary_handler+0x2f4/0xac0 fs/exec.c:1659 exec_binprm fs/exec.c:1702 [inline] __do_execve_file+0x2218/0x2e90 fs/exec.c:1822 do_execveat_common fs/exec.c:1868 [inline] do_execve fs/exec.c:1885 [inline] __do_sys_execve fs/exec.c:1961 [inline] __se_sys_execve+0xec/0x110 fs/exec.c:1956 __x64_sys_execve+0x4a/0x70 fs/exec.c:1956 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline] kmsan_internal_poison_shadow+0x60/0x120 mm/kmsan/kmsan.c:134 kmsan_slab_free+0x8d/0xf0 mm/kmsan/kmsan_hooks.c:108 slab_free_freelist_hook mm/slub.c:1473 [inline] slab_free mm/slub.c:3046 [inline] kmem_cache_free_bulk+0x3ad9/0x3f10 mm/slub.c:3171 __kfree_skb_flush+0xb0/0x100 net/core/skbuff.c:862 net_rx_action+0x1a5e/0x1aa0 net/core/dev.c:6483 __do_softirq+0x4a1/0x83a kernel/softirq.c:293 do_softirq_own_stack+0x49/0x80 arch/x86/entry/entry_64.S:1093 do_softirq kernel/softirq.c:338 [inline] __local_bh_enable_ip+0x184/0x1d0 kernel/softirq.c:190 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x4b/0x60 kernel/locking/spinlock.c:207 spin_unlock_bh include/linux/spinlock.h:383 [inline] batadv_nc_purge_paths+0x6eb/0x780 net/batman-adv/network-coding.c:470 batadv_nc_worker+0x3a2/0x1b00 net/batman-adv/network-coding.c:719 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 =====================================================