================================================================== BUG: KASAN: use-after-free in __le32_to_cpup include/uapi/linux/byteorder/little_endian.h:58 [inline] BUG: KASAN: use-after-free in le32_to_cpuvp crypto/chacha20_generic.c:19 [inline] BUG: KASAN: use-after-free in crypto_chacha20_init crypto/chacha20_generic.c:58 [inline] BUG: KASAN: use-after-free in crypto_chacha20_crypt+0xaf1/0xbd0 crypto/chacha20_generic.c:91 Read of size 4 at addr ffff880100000006 by task syzkaller392542/8351 CPU: 1 PID: 8351 Comm: syzkaller392542 Not tainted 4.15.0-rc4+ #229 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_address_description+0x73/0x250 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report+0x25b/0x340 mm/kasan/report.c:409 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429 __le32_to_cpup include/uapi/linux/byteorder/little_endian.h:58 [inline] le32_to_cpuvp crypto/chacha20_generic.c:19 [inline] crypto_chacha20_init crypto/chacha20_generic.c:58 [inline] crypto_chacha20_crypt+0xaf1/0xbd0 crypto/chacha20_generic.c:91 chacha20_simd+0xe4/0x410 arch/x86/crypto/chacha20_glue.c:78 crypto_skcipher_decrypt include/crypto/skcipher.h:463 [inline] _skcipher_recvmsg crypto/algif_skcipher.c:144 [inline] skcipher_recvmsg+0xa4e/0xf10 crypto/algif_skcipher.c:165 sock_recvmsg_nosec net/socket.c:809 [inline] sock_recvmsg+0xc9/0x110 net/socket.c:816 sock_read_iter+0x35b/0x560 net/socket.c:893 call_read_iter include/linux/fs.h:1766 [inline] do_iter_readv_writev+0x5fb/0x7f0 fs/read_write.c:651 do_iter_read+0x21a/0x5a0 fs/read_write.c:895 vfs_readv+0x121/0x1c0 fs/read_write.c:959 do_readv+0xfc/0x2a0 fs/read_write.c:992 SYSC_readv fs/read_write.c:1079 [inline] SyS_readv+0x27/0x30 fs/read_write.c:1076 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x44abf9 RSP: 002b:00007fcd6800ddc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000044abf9 RDX: 0000000000000005 RSI: 0000000020b3a000 RDI: 000000000000008f RBP: 0000000000000000 R08: 00007fcd6800e700 R09: 00007fcd6800e700 R10: 00007fcd6800e700 R11: 0000000000000202 R12: 0000000000000000 R13: 00007ffe76d6b40f R14: 00007fcd6800e9c0 R15: 0000000000000000 The buggy address belongs to the page: page:000000005d51089a count:0 mapcount:-127 mapping: (null) index:0x0 flags: 0x2fffc0000000000() raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffff80 raw: ffff88021fffae20 ffffea0004010020 000000000000000a 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: BUG: unable to handle kernel paging request at ffffed001fffffe0 IP: memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:53 PGD 21ffd6067 P4D 21ffd6067 PUD 21ffd5067 PMD 0 Oops: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 8351 Comm: syzkaller392542 Not tainted 4.15.0-rc4+ #229 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:53 RSP: 0018:ffff8801be94f408 EFLAGS: 00010092 RAX: ffff8801be94f414 RBX: ffffed001fffffe0 RCX: 0000000000000010 RDX: 0000000000000010 RSI: ffffed001fffffe0 RDI: ffff8801be94f414 RBP: ffff8801be94f460 R08: ffffed0037d29e87 R09: ffffed0037d29e87 R10: dffffc0000000000 R11: ffffed0037d29e86 R12: 00000000fffffffe R13: ffff8800ffffff00 R14: ffffed0020000000 R15: 0000000000000014 FS: 00007fcd6800e700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed001fffffe0 CR3: 00000001d025c004 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kasan_report_error mm/kasan/report.c:353 [inline] kasan_report+0x26f/0x340 mm/kasan/report.c:409 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429 __le32_to_cpup include/uapi/linux/byteorder/little_endian.h:58 [inline] le32_to_cpuvp crypto/chacha20_generic.c:19 [inline] crypto_chacha20_init crypto/chacha20_generic.c:58 [inline] crypto_chacha20_crypt+0xaf1/0xbd0 crypto/chacha20_generic.c:91 chacha20_simd+0xe4/0x410 arch/x86/crypto/chacha20_glue.c:78 crypto_skcipher_decrypt include/crypto/skcipher.h:463 [inline] _skcipher_recvmsg crypto/algif_skcipher.c:144 [inline] skcipher_recvmsg+0xa4e/0xf10 crypto/algif_skcipher.c:165 sock_recvmsg_nosec net/socket.c:809 [inline] sock_recvmsg+0xc9/0x110 net/socket.c:816 sock_read_iter+0x35b/0x560 net/socket.c:893 call_read_iter include/linux/fs.h:1766 [inline] do_iter_readv_writev+0x5fb/0x7f0 fs/read_write.c:651 do_iter_read+0x21a/0x5a0 fs/read_write.c:895 vfs_readv+0x121/0x1c0 fs/read_write.c:959 do_readv+0xfc/0x2a0 fs/read_write.c:992 SYSC_readv fs/read_write.c:1079 [inline] SyS_readv+0x27/0x30 fs/read_write.c:1076 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x44abf9 RSP: 002b:00007fcd6800ddc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000044abf9 RDX: 0000000000000005 RSI: 0000000020b3a000 RDI: 000000000000008f RBP: 0000000000000000 R08: 00007fcd6800e700 R09: 00007fcd6800e700 R10: 00007fcd6800e700 R11: 0000000000000202 R12: 0000000000000000 R13: 00007ffe76d6b40f R14: 00007fcd6800e9c0 R15: 0000000000000000 Code: 90 90 90 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 RIP: memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:53 RSP: ffff8801be94f408 CR2: ffffed001fffffe0 ---[ end trace 13660e7c8dcc7b1a ]---