================================================================== 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: 12237 Comm: syz-fuzzer 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_get_shadow_origin_ptr+0x0/0x3a0 mm/kmsan/kmsan.c:656 Code: 35 c9 d7 fe 7d 65 48 8b 15 4d f5 07 7e 48 c7 c7 fe 3a 26 8f 31 c0 e8 4c 82 73 ff 0f 0b 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 50 49 89 f7 49 89 fe 48 81 RSP: 0018:ffff8880accfecf8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880accfef80 RBP: ffff8880accfed00 R08: ffffea000000000f R09: ffff88812fffb000 R10: 0000000000000004 R11: 00000000a4376ade R12: 0000000000000000 R13: 000000000000002c R14: 0000000000000000 R15: 0000000000000000 BLEND_OP crypto/sha256_generic.c:63 [inline] sha256_transform crypto/sha256_generic.c:78 [inline] sha256_generic_block_fn+0x2a6/0x8870 crypto/sha256_generic.c:233 sha256_base_do_update include/crypto/sha256_base.h:79 [inline] crypto_sha256_update+0x3f6/0x480 crypto/sha256_generic.c:241 crypto_shash_update+0x4eb/0x550 crypto/shash.c:107 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:361 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:381 [inline] ima_calc_file_hash+0x170a/0x3240 security/integrity/ima/ima_crypto.c:446 ima_collect_measurement+0x4a5/0x9e0 security/integrity/ima/ima_api.c:239 process_measurement+0x1a7d/0x2ba0 security/integrity/ima/ima_main.c:311 ima_file_check+0x131/0x170 security/integrity/ima/ima_main.c:422 do_last fs/namei.c:3420 [inline] path_openat+0x4b09/0x6bb0 fs/namei.c:3533 do_filp_open+0x2b8/0x710 fs/namei.c:3563 do_sys_open+0x642/0xa30 fs/open.c:1089 __do_sys_openat fs/open.c:1116 [inline] __se_sys_openat+0xcb/0xe0 fs/open.c:1110 __x64_sys_openat+0x56/0x70 fs/open.c:1110 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x47fd2a Code: e8 bb 40 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 4c 8b 54 24 28 4c 8b 44 24 30 4c 8b 4c 24 38 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 40 ff ff ff ff 48 c7 44 24 48 RSP: 002b:000000c4201657f8 EFLAGS: 00000216 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fd2a RDX: 0000000000080002 RSI: 000000c42d5a6380 RDI: ffffffffffffff9c RBP: 000000c420165878 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000001a4 R11: 0000000000000216 R12: 0000000000000000 R13: 00000000000000f5 R14: 0000000000000075 R15: 0000000000000004 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+0x0/0x3a0 mm/kmsan/kmsan.c:552 BLEND_OP crypto/sha256_generic.c:63 [inline] sha256_transform crypto/sha256_generic.c:78 [inline] sha256_generic_block_fn+0x2a6/0x8870 crypto/sha256_generic.c:233 sha256_base_do_update include/crypto/sha256_base.h:79 [inline] crypto_sha256_update+0x3f6/0x480 crypto/sha256_generic.c:241 crypto_shash_update+0x4eb/0x550 crypto/shash.c:107 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:361 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:381 [inline] ima_calc_file_hash+0x170a/0x3240 security/integrity/ima/ima_crypto.c:446 ima_collect_measurement+0x4a5/0x9e0 security/integrity/ima/ima_api.c:239 process_measurement+0x1a7d/0x2ba0 security/integrity/ima/ima_main.c:311 ima_file_check+0x131/0x170 security/integrity/ima/ima_main.c:422 do_last fs/namei.c:3420 [inline] path_openat+0x4b09/0x6bb0 fs/namei.c:3533 do_filp_open+0x2b8/0x710 fs/namei.c:3563 do_sys_open+0x642/0xa30 fs/open.c:1089 __do_sys_openat fs/open.c:1116 [inline] __se_sys_openat+0xcb/0xe0 fs/open.c:1110 __x64_sys_openat+0x56/0x70 fs/open.c:1110 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 pfn_valid include/linux/mmzone.h:1341 [inline] my_virt_addr_valid mm/kmsan/kmsan.c:471 [inline] virt_to_page_or_null+0x49/0x100 mm/kmsan/kmsan.c:476 __msan_metadata_ptr_for_store_8+0x13/0x20 mm/kmsan/kmsan_instr.c:55 skb_push+0x9e/0x250 net/core/skbuff.c:1882 __tcp_transmit_skb+0x950/0x5c60 net/ipv4/tcp_output.c:1076 __tcp_send_ack+0x701/0x840 net/ipv4/tcp_output.c:3681 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 ==================================================================