On Wed, Jan 03, 2018 at 12:58:02AM -0800, syzbot wrote: > Hello, > > syzkaller hit the following crash on > 72bca2084a21edda74b802bc076083d5951f67b4 > git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/master > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached > Raw console output is attached. > C reproducer is attached > syzkaller reproducer is attached. See https://goo.gl/kgGztJ > for information about syzkaller reproducers > > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+9da652f470afd0313350@xxxxxxxxxxxxxxxxxxxxxxxxx > It will help syzbot understand when the bug is fixed. See footer for > details. > If you forward the report, please keep this part and the footer. > > audit: type=1400 audit(1514967540.602:7): avc: denied { map } for > pid=3499 comm="syzkaller241446" path="/root/syzkaller241446574" > dev="sda1" ino=16481 > scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 > tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file > permissive=1 > kasan: CONFIG_KASAN_INLINE enabled > kasan: GPF could be caused by NULL-ptr deref or user memory access > general protection fault: 0000 [#1] SMP KASAN > Dumping ftrace buffer: > (ftrace buffer empty) > Modules linked in: > CPU: 1 PID: 3499 Comm: syzkaller241446 Not tainted 4.15.0-rc5+ #173 > Hardware name: Google Google Compute Engine/Google Compute Engine, > BIOS Google 01/01/2011 > RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:86 [inline] > RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:111 [inline] > RIP: 0010:scatterwalk_done include/crypto/scatterwalk.h:119 [inline] > RIP: 0010:blkcipher_walk_done+0x300/0xde0 crypto/blkcipher.c:124 > RSP: 0018:ffff8801c027f340 EFLAGS: 00010202 > RAX: 0000000000000000 RBX: 00000000a74a7bf1 RCX: 0000000000000001 > RDX: dffffc0000000000 RSI: 0000000000000400 RDI: 0000000000000008 > RBP: ffff8801c027f390 R08: 00000000fffff8f8 R09: 0000000000000000 > R10: 0000000000000003 R11: 0000000000000000 R12: ffff8801c027f640 > R13: ffff8801c027f4f0 R14: ffff8801c027f538 R15: ffff8801c027f518 > FS: 0000000001046880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00000000201c9000 CR3: 00000001c09f5005 CR4: 00000000001606e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > glue_ctr_crypt_128bit+0x597/0xc20 arch/x86/crypto/glue_helper.c:289 > ctr_crypt+0x34/0x40 arch/x86/crypto/serpent_avx2_glue.c:168 > __ablk_encrypt+0x1d1/0x2d0 crypto/ablk_helper.c:64 > ablk_encrypt+0x23e/0x2c0 crypto/ablk_helper.c:84 > skcipher_crypt_ablkcipher crypto/skcipher.c:712 [inline] > skcipher_decrypt_ablkcipher+0x312/0x420 crypto/skcipher.c:730 > crypto_skcipher_decrypt include/crypto/skcipher.h:463 [inline] > chacha_decrypt crypto/chacha20poly1305.c:152 [inline] > poly_tail_continue+0x42a/0x6b0 crypto/chacha20poly1305.c:167 > poly_tail+0x40f/0x520 crypto/chacha20poly1305.c:201 > poly_cipherpad+0x33e/0x470 crypto/chacha20poly1305.c:231 > poly_cipher+0x303/0x440 crypto/chacha20poly1305.c:262 > poly_adpad+0x347/0x480 crypto/chacha20poly1305.c:292 > poly_ad+0x25c/0x300 crypto/chacha20poly1305.c:316 > poly_setkey+0x2fc/0x3e0 crypto/chacha20poly1305.c:343 > poly_init+0x16c/0x1d0 crypto/chacha20poly1305.c:366 > poly_genkey+0x422/0x590 crypto/chacha20poly1305.c:406 > chachapoly_decrypt+0x73/0x90 crypto/chacha20poly1305.c:488 > crypto_aead_decrypt include/crypto/aead.h:362 [inline] > _aead_recvmsg crypto/algif_aead.c:314 [inline] > aead_recvmsg+0x154a/0x1cf0 crypto/algif_aead.c:335 > sock_recvmsg_nosec net/socket.c:801 [inline] > sock_recvmsg+0xc9/0x110 net/socket.c:808 > ___sys_recvmsg+0x2a4/0x640 net/socket.c:2177 > __sys_recvmsg+0xe2/0x210 net/socket.c:2222 > SYSC_recvmsg net/socket.c:2234 [inline] > SyS_recvmsg+0x2d/0x50 net/socket.c:2229 > entry_SYSCALL_64_fastpath+0x23/0x9a > RIP: 0033:0x43ff19 > RSP: 002b:00007ffce23dfc18 EFLAGS: 00000217 ORIG_RAX: 000000000000002f > RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043ff19 > RDX: 0000000000000000 RSI: 0000000020318fc8 RDI: 0000000000000004 > RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401880 > R13: 0000000000401910 R14: 0000000000000000 R15: 0000000000000000 > Code: 00 fc ff df 48 c1 e9 03 80 3c 11 00 0f 85 7a 09 00 00 48 8d 78 > 08 48 ba 00 00 00 00 00 fc ff df 49 89 45 20 48 89 f9 48 c1 e9 03 > <0f> b6 14 11 84 d2 74 09 80 fa 03 0f 8e 3e 09 00 00 4c 89 f9 8b > RIP: scatterwalk_start include/crypto/scatterwalk.h:86 [inline] RSP: > ffff8801c027f340 > RIP: scatterwalk_pagedone include/crypto/scatterwalk.h:111 [inline] > RSP: ffff8801c027f340 > RIP: scatterwalk_done include/crypto/scatterwalk.h:119 [inline] RSP: > ffff8801c027f340 > RIP: blkcipher_walk_done+0x300/0xde0 crypto/blkcipher.c:124 RSP: > ffff8801c027f340 > ---[ end trace ca435b26a13c286a ]--- > > Duplicate: #syz dup: KASAN: wild-memory-access Write in scatterwalk_copychunks Fix is already in crypto/master ("crypto: chacha20poly1305 - validate the digest size")
