On Fri, Mar 23, 2018 at 01:01:02PM -0700, syzbot wrote: > Hello, > > syzbot hit the following crash on upstream commit > 8f5fd927c3a7576d57248a2d7a0861c3f2795973 (Fri Mar 16 20:37:42 2018 +0000) > Merge tag 'for-4.16-rc5-tag' of > git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux > syzbot dashboard link: > https://syzkaller.appspot.com/bug?extid=2a2c48fc189ed5125b9c > > So far this crash happened 2 times on upstream. > C reproducer is attached. > syzkaller reproducer is attached. > Raw console output is attached. > .config is attached. > compiler: gcc (GCC) 7.1.1 20170620 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+2a2c48fc189ed5125b9c@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(1521277737.761:7): avc: denied { map } for > pid=4234 comm="syzkaller098821" path="/root/syzkaller098821515" 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: 0 PID: 4236 Comm: syzkaller098821 Not tainted 4.16.0-rc5+ #357 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:rdma_addr_size+0x1e/0x70 drivers/infiniband/core/addr.c:197 > RSP: 0018:ffff8801b9cc7870 EFLAGS: 00010202 > RAX: dffffc0000000000 RBX: 0000000000000020 RCX: ffffffff841374bd > RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000020 > RBP: ffff8801b9cc7878 R08: ffffed0037398f3a R09: ffff8801b9cc78c0 > R10: 0000000000000022 R11: ffffed0037398f39 R12: ffff8801b9cc78c0 > R13: ffff8801b260a1f0 R14: ffff8801b9cc7a00 R15: 0000000000000020 > FS: 00007fd9212b2700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007fd9212b1e78 CR3: 00000001b7af4006 CR4: 00000000001606f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > ucma_query_addr.isra.7+0xce/0x4f0 drivers/infiniband/core/ucma.c:871 > ucma_query+0x1bb/0x230 drivers/infiniband/core/ucma.c:991 > ucma_write+0x2d6/0x3d0 drivers/infiniband/core/ucma.c:1633 > __vfs_write+0xef/0x970 fs/read_write.c:480 > vfs_write+0x189/0x510 fs/read_write.c:544 > SYSC_write fs/read_write.c:589 [inline] > SyS_write+0xef/0x220 fs/read_write.c:581 > do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 > entry_SYSCALL_64_after_hwframe+0x42/0xb7 > RIP: 0033:0x445959 > RSP: 002b:00007fd9212b1da8 EFLAGS: 00000297 ORIG_RAX: 0000000000000001 > RAX: ffffffffffffffda RBX: 00000000006dac5c RCX: 0000000000445959 > RDX: 0000000000000018 RSI: 00000000200022c0 RDI: 0000000000000003 > RBP: 00000000006dac58 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000297 R12: 006d635f616d6472 > R13: 2f646e6162696e69 R14: 666e692f7665642f R15: 0000000000000008 > Code: 29 e4 95 fd e9 f8 fe ff ff 90 90 90 90 55 48 89 e5 53 48 89 fb e8 e3 > a2 5d fd 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 > 89 d8 83 e0 07 83 c0 01 38 d0 7c 04 84 d2 75 2f > RIP: rdma_addr_size+0x1e/0x70 drivers/infiniband/core/addr.c:197 RSP: > ffff8801b9cc7870 > ---[ end trace 6c753cc522bb59ed ]--- > Kernel panic - not syncing: Fatal exception > Dumping ftrace buffer: > (ftrace buffer empty) > Kernel Offset: disabled > Rebooting in 86400 seconds.. > > > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this bug report. > If you forgot to add the Reported-by tag, once the fix for this bug is > merged > into any tree, please reply to this email with: > #syz fix: exact-commit-title This seems to have been fixed by commit e8980d67d6017: #syz fix: RDMA/ucma: Ensure that CM_ID exists prior to access it - Eric -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
