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================================================================== BUG: KMSAN: uninit-value in eth_type_trans+0x4ab/0x970 net/ethernet/eth.c:168 CPU: 1 PID: 10423 Comm: syz-executor7 Not tainted 4.17.0+ #9 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+0x185/0x1d0 lib/dump_stack.c:113 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1125 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:620 eth_type_trans+0x4ab/0x970 net/ethernet/eth.c:168 tun_get_user+0x4928/0x7f00 drivers/net/tun.c:1899 tun_chr_write_iter+0x1d4/0x330 drivers/net/tun.c:1998 call_write_iter include/linux/fs.h:1784 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x808/0x9f0 fs/read_write.c:487 __kernel_write+0x201/0x5c0 fs/read_write.c:506 write_pipe_buf+0x1d5/0x270 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x4a5/0xf50 fs/splice.c:626 splice_from_pipe fs/splice.c:661 [inline] default_file_splice_write+0x1d9/0x380 fs/splice.c:809 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x19e/0x200 fs/splice.c:1018 splice_direct_to_actor+0x767/0x1040 fs/splice.c:973 do_splice_direct+0x335/0x540 fs/splice.c:1061 do_sendfile+0x107b/0x1e40 fs/read_write.c:1440 __do_sys_sendfile64 fs/read_write.c:1495 [inline] __se_sys_sendfile64 fs/read_write.c:1487 [inline] __x64_sys_sendfile64+0x218/0x390 fs/read_write.c:1487 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x455b29 RSP: 002b:00007f707064bc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f707064c6d4 RCX: 0000000000455b29 RDX: 0000000020d83ff8 RSI: 0000000000000018 RDI: 0000000000000015 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 00008000fffffffe R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c0acd R14: 00000000004d0760 R15: 0000000000000000 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline] kmsan_save_stack mm/kmsan/kmsan.c:297 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:689 kmsan_memcpy_origins+0x11d/0x170 mm/kmsan/kmsan.c:530 __msan_memcpy+0x109/0x160 mm/kmsan/kmsan_instr.c:413 _copy_from_iter+0xf17/0x1d30 lib/iov_iter.c:591 copy_from_iter include/linux/uio.h:115 [inline] skb_copy_datagram_from_iter+0x208/0xcd0 net/core/datagram.c:521 tun_get_user+0x39b7/0x7f00 drivers/net/tun.c:1849 tun_chr_write_iter+0x1d4/0x330 drivers/net/tun.c:1998 call_write_iter include/linux/fs.h:1784 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x808/0x9f0 fs/read_write.c:487 __kernel_write+0x201/0x5c0 fs/read_write.c:506 write_pipe_buf+0x1d5/0x270 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x4a5/0xf50 fs/splice.c:626 splice_from_pipe fs/splice.c:661 [inline] default_file_splice_write+0x1d9/0x380 fs/splice.c:809 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x19e/0x200 fs/splice.c:1018 splice_direct_to_actor+0x767/0x1040 fs/splice.c:973 do_splice_direct+0x335/0x540 fs/splice.c:1061 do_sendfile+0x107b/0x1e40 fs/read_write.c:1440 __do_sys_sendfile64 fs/read_write.c:1495 [inline] __se_sys_sendfile64 fs/read_write.c:1487 [inline] __x64_sys_sendfile64+0x218/0x390 fs/read_write.c:1487 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline] kmsan_alloc_meta_for_pages+0x161/0x3a0 mm/kmsan/kmsan.c:819 kmsan_alloc_page+0x82/0xe0 mm/kmsan/kmsan.c:889 __alloc_pages_nodemask+0xf7b/0x5cc0 mm/page_alloc.c:4402 alloc_pages_current+0x6b1/0x970 mm/mempolicy.c:2093 alloc_pages include/linux/gfp.h:494 [inline] __page_cache_alloc+0x95/0x320 mm/filemap.c:946 page_cache_alloc include/linux/pagemap.h:234 [inline] generic_file_buffered_read mm/filemap.c:2273 [inline] generic_file_read_iter+0x22a4/0x44d0 mm/filemap.c:2362 call_read_iter include/linux/fs.h:1778 [inline] generic_file_splice_read+0x5d7/0x900 fs/splice.c:307 do_splice_to fs/splice.c:880 [inline] splice_direct_to_actor+0x4cb/0x1040 fs/splice.c:952 do_splice_direct+0x335/0x540 fs/splice.c:1061 do_sendfile+0x107b/0x1e40 fs/read_write.c:1440 __do_sys_sendfile64 fs/read_write.c:1495 [inline] __se_sys_sendfile64 fs/read_write.c:1487 [inline] __x64_sys_sendfile64+0x218/0x390 fs/read_write.c:1487 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2018/06/19 07:43 | https://github.com/google/kmsan.git master | 123906095e30 | 45c54f75 | .config | console log | report | ci-upstream-kmsan-gce | |||||
2018/06/16 00:25 | https://github.com/google/kmsan.git master | 88e0e95b30f1 | 27c5f59f | .config | console log | report | ci-upstream-kmsan-gce |