Probably a bug in crypto/drbg.c. Stephan, can you take a look? On Tue, Jun 02, 2020 at 08:41:21PM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 19409891 Merge tag 'pnp-5.8-rc1' of git://git.kernel.org/p.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=13165aa6100000 > kernel config: https://syzkaller.appspot.com/x/.config?x=6d41e63a2c7e0715 > dashboard link: https://syzkaller.appspot.com/bug?extid=2e635807decef724a1fa > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17f00ef2100000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=170f2ef2100000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+2e635807decef724a1fa@xxxxxxxxxxxxxxxxxxxxxxxxx > > executing program > executing program > BUG: memory leak > unreferenced object 0xffff8881175bc480 (size 64): > comm "syz-executor064", pid 6388, jiffies 4294941622 (age 13.280s) > hex dump (first 32 bytes): > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > e0 7e 56 84 ff ff ff ff 00 00 00 00 00 00 00 00 .~V............. > backtrace: > [<0000000029c7602f>] kmalloc include/linux/slab.h:560 [inline] > [<0000000029c7602f>] kzalloc include/linux/slab.h:669 [inline] > [<0000000029c7602f>] crypto_create_tfm+0x31/0x100 crypto/api.c:448 > [<00000000bec8cbdb>] crypto_alloc_tfm+0x79/0x1a0 crypto/api.c:527 > [<000000002f9791ba>] drbg_prepare_hrng crypto/drbg.c:1509 [inline] > [<000000002f9791ba>] drbg_instantiate crypto/drbg.c:1587 [inline] > [<000000002f9791ba>] drbg_kcapi_seed+0x432/0x6a9 crypto/drbg.c:1980 > [<0000000041302bb8>] crypto_rng_reset+0x35/0x1a0 crypto/rng.c:53 > [<000000004758c3c4>] alg_setkey crypto/af_alg.c:222 [inline] > [<000000004758c3c4>] alg_setsockopt+0x149/0x190 crypto/af_alg.c:255 > [<000000008bc4b5cb>] __sys_setsockopt+0x112/0x230 net/socket.c:2132 > [<00000000cfbf30da>] __do_sys_setsockopt net/socket.c:2148 [inline] > [<00000000cfbf30da>] __se_sys_setsockopt net/socket.c:2145 [inline] > [<00000000cfbf30da>] __x64_sys_setsockopt+0x22/0x30 net/socket.c:2145 > [<00000000fc9c2183>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295 > [<0000000040e080a1>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 > > BUG: memory leak > unreferenced object 0xffff8881175bc040 (size 64): > comm "syz-executor064", pid 6389, jiffies 4294942172 (age 7.780s) > hex dump (first 32 bytes): > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ > e0 7e 56 84 ff ff ff ff 00 00 00 00 00 00 00 00 .~V............. > backtrace: > [<0000000029c7602f>] kmalloc include/linux/slab.h:560 [inline] > [<0000000029c7602f>] kzalloc include/linux/slab.h:669 [inline] > [<0000000029c7602f>] crypto_create_tfm+0x31/0x100 crypto/api.c:448 > [<00000000bec8cbdb>] crypto_alloc_tfm+0x79/0x1a0 crypto/api.c:527 > [<000000002f9791ba>] drbg_prepare_hrng crypto/drbg.c:1509 [inline] > [<000000002f9791ba>] drbg_instantiate crypto/drbg.c:1587 [inline] > [<000000002f9791ba>] drbg_kcapi_seed+0x432/0x6a9 crypto/drbg.c:1980 > [<0000000041302bb8>] crypto_rng_reset+0x35/0x1a0 crypto/rng.c:53 > [<000000004758c3c4>] alg_setkey crypto/af_alg.c:222 [inline] > [<000000004758c3c4>] alg_setsockopt+0x149/0x190 crypto/af_alg.c:255 > [<000000008bc4b5cb>] __sys_setsockopt+0x112/0x230 net/socket.c:2132 > [<00000000cfbf30da>] __do_sys_setsockopt net/socket.c:2148 [inline] > [<00000000cfbf30da>] __se_sys_setsockopt net/socket.c:2145 [inline] > [<00000000cfbf30da>] __x64_sys_setsockopt+0x22/0x30 net/socket.c:2145 > [<00000000fc9c2183>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295 > [<0000000040e080a1>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 > > BUG: memory leak > unreferenced object 0xffff88811b3ca080 (size 96): > comm "syz-executor064", pid 6389, jiffies 4294942172 (age 7.780s) > hex dump (first 32 bytes): > 89 c7 08 cb 8a 12 10 6e 00 00 00 00 00 00 00 00 .......n........ > 71 51 5a c2 1b 00 00 00 35 7d 00 00 00 00 00 00 qQZ.....5}...... > backtrace: > [<000000008ec3eca0>] jent_entropy_collector_alloc+0x1b/0xf8 crypto/jitterentropy.c:662 > [<0000000026ed401a>] jent_kcapi_init+0x17/0x40 crypto/jitterentropy-kcapi.c:119 > [<00000000be7d6b06>] crypto_create_tfm+0x89/0x100 crypto/api.c:459 > [<00000000bec8cbdb>] crypto_alloc_tfm+0x79/0x1a0 crypto/api.c:527 > [<000000002f9791ba>] drbg_prepare_hrng crypto/drbg.c:1509 [inline] > [<000000002f9791ba>] drbg_instantiate crypto/drbg.c:1587 [inline] > [<000000002f9791ba>] drbg_kcapi_seed+0x432/0x6a9 crypto/drbg.c:1980 > [<0000000041302bb8>] crypto_rng_reset+0x35/0x1a0 crypto/rng.c:53 > [<000000004758c3c4>] alg_setkey crypto/af_alg.c:222 [inline] > [<000000004758c3c4>] alg_setsockopt+0x149/0x190 crypto/af_alg.c:255 > [<000000008bc4b5cb>] __sys_setsockopt+0x112/0x230 net/socket.c:2132 > [<00000000cfbf30da>] __do_sys_setsockopt net/socket.c:2148 [inline] > [<00000000cfbf30da>] __se_sys_setsockopt net/socket.c:2145 [inline] > [<00000000cfbf30da>] __x64_sys_setsockopt+0x22/0x30 net/socket.c:2145 > [<00000000fc9c2183>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295 > [<0000000040e080a1>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 > > > > --- > This bug is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > syzbot can test patches for this bug, for details see: > https://goo.gl/tpsmEJ#testing-patches > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/0000000000002a280b05a725cd93%40google.com.
