* Re: BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:LINE [not found] <001a1145e8549aecca055f38a0b5@google.com> @ 2017-11-30 20:41 ` Eric Biggers 2017-12-01 8:19 ` Dmitry Vyukov 0 siblings, 1 reply; 3+ messages in thread From: Eric Biggers @ 2017-11-30 20:41 UTC (permalink / raw) To: syzbot Cc: JBeulich, hpa, kirill.shutemov, ldufour, linux-kernel, luto, mingo, ricardo.neri-calderon, syzkaller-bugs, tglx, x86 On Thu, Nov 30, 2017 at 11:55:00AM -0800, syzbot wrote: > Call Trace: > __dump_stack lib/dump_stack.c:17 [inline] > dump_stack+0x194/0x257 lib/dump_stack.c:53 > ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6060 > __might_sleep+0x95/0x190 kernel/sched/core.c:6013 > __do_page_fault+0x350/0xc90 arch/x86/mm/fault.c:1372 > do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 > page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1094 > RIP: 0010:virt_to_cache mm/slab.c:400 [inline] > RIP: 0010:kfree+0xb2/0x250 mm/slab.c:3802 > RSP: 0018:ffff8801cc82f780 EFLAGS: 00010046 > RAX: 0000000000000000 RBX: ffff8801cc82f948 RCX: ffffffffffffffff > RDX: ffffea0007320bc0 RSI: 0000000000000000 RDI: ffff8801cc82f948 > RBP: ffff8801cc82f7a0 R08: ffffed003a54e4dc R09: 0000000000000000 > R10: 0000000000000001 R11: ffffed003a54e4db R12: 0000000000000286 > R13: 0000000000000000 R14: ffff8801cc82f948 R15: ffff8801cc82f8b0 > blkcipher_walk_done+0x72b/0xde0 crypto/blkcipher.c:139 > encrypt+0x50a/0xaf0 crypto/salsa20_generic.c:208 > skcipher_crypt_blkcipher crypto/skcipher.c:622 [inline] > skcipher_decrypt_blkcipher+0x213/0x310 crypto/skcipher.c:640 > crypto_skcipher_decrypt include/crypto/skcipher.h:463 [inline] > _skcipher_recvmsg crypto/algif_skcipher.c:144 [inline] > skcipher_recvmsg+0xa54/0xf20 crypto/algif_skcipher.c:165 > sock_recvmsg_nosec net/socket.c:805 [inline] > sock_recvmsg+0xc9/0x110 net/socket.c:812 > ___sys_recvmsg+0x29b/0x630 net/socket.c:2207 > __sys_recvmsg+0xe2/0x210 net/socket.c:2252 > SYSC_recvmsg net/socket.c:2264 [inline] > SyS_recvmsg+0x2d/0x50 net/socket.c:2259 > entry_SYSCALL_64_fastpath+0x1f/0x96 Yet another duplicate of the Salsa20 bug: #syz dup: WARNING: suspicious RCU usage (3) Looks like this one was incorrectly attributed to x86 rather than crypto? kfree() is being called with preempt_count corrupted *and* with an uninitialized pointer, so it can cause quite a few different problems... Eric ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:LINE 2017-11-30 20:41 ` BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:LINE Eric Biggers @ 2017-12-01 8:19 ` Dmitry Vyukov 2017-12-08 13:43 ` Andrey Konovalov 0 siblings, 1 reply; 3+ messages in thread From: Dmitry Vyukov @ 2017-12-01 8:19 UTC (permalink / raw) To: Eric Biggers Cc: syzbot, Jan Beulich, H. Peter Anvin, Kirill A. Shutemov, ldufour, LKML, Andy Lutomirski, Ingo Molnar, ricardo.neri-calderon, syzkaller-bugs, Thomas Gleixner, the arch/x86 maintainers, andreyknvl On Thu, Nov 30, 2017 at 9:41 PM, Eric Biggers <ebiggers3@gmail.com> wrote: > On Thu, Nov 30, 2017 at 11:55:00AM -0800, syzbot wrote: >> Call Trace: >> __dump_stack lib/dump_stack.c:17 [inline] >> dump_stack+0x194/0x257 lib/dump_stack.c:53 >> ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6060 >> __might_sleep+0x95/0x190 kernel/sched/core.c:6013 >> __do_page_fault+0x350/0xc90 arch/x86/mm/fault.c:1372 >> do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 >> page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1094 >> RIP: 0010:virt_to_cache mm/slab.c:400 [inline] >> RIP: 0010:kfree+0xb2/0x250 mm/slab.c:3802 >> RSP: 0018:ffff8801cc82f780 EFLAGS: 00010046 >> RAX: 0000000000000000 RBX: ffff8801cc82f948 RCX: ffffffffffffffff >> RDX: ffffea0007320bc0 RSI: 0000000000000000 RDI: ffff8801cc82f948 >> RBP: ffff8801cc82f7a0 R08: ffffed003a54e4dc R09: 0000000000000000 >> R10: 0000000000000001 R11: ffffed003a54e4db R12: 0000000000000286 >> R13: 0000000000000000 R14: ffff8801cc82f948 R15: ffff8801cc82f8b0 >> blkcipher_walk_done+0x72b/0xde0 crypto/blkcipher.c:139 >> encrypt+0x50a/0xaf0 crypto/salsa20_generic.c:208 >> skcipher_crypt_blkcipher crypto/skcipher.c:622 [inline] >> skcipher_decrypt_blkcipher+0x213/0x310 crypto/skcipher.c:640 >> crypto_skcipher_decrypt include/crypto/skcipher.h:463 [inline] >> _skcipher_recvmsg crypto/algif_skcipher.c:144 [inline] >> skcipher_recvmsg+0xa54/0xf20 crypto/algif_skcipher.c:165 >> sock_recvmsg_nosec net/socket.c:805 [inline] >> sock_recvmsg+0xc9/0x110 net/socket.c:812 >> ___sys_recvmsg+0x29b/0x630 net/socket.c:2207 >> __sys_recvmsg+0xe2/0x210 net/socket.c:2252 >> SYSC_recvmsg net/socket.c:2264 [inline] >> SyS_recvmsg+0x2d/0x50 net/socket.c:2259 >> entry_SYSCALL_64_fastpath+0x1f/0x96 > > Yet another duplicate of the Salsa20 bug: > > #syz dup: WARNING: suspicious RCU usage (3) > > Looks like this one was incorrectly attributed to x86 rather than crypto? +Andrey, please check why syzbot has attributed this to x86. > kfree() is being called with preempt_count corrupted *and* with an uninitialized > pointer, so it can cause quite a few different problems... Yeah, it's a bad one. Hopefully fixes will start to propagate soon. ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:LINE 2017-12-01 8:19 ` Dmitry Vyukov @ 2017-12-08 13:43 ` Andrey Konovalov 0 siblings, 0 replies; 3+ messages in thread From: Andrey Konovalov @ 2017-12-08 13:43 UTC (permalink / raw) To: Dmitry Vyukov Cc: Eric Biggers, syzbot, Jan Beulich, H. Peter Anvin, Kirill A. Shutemov, ldufour, LKML, Andy Lutomirski, Ingo Molnar, ricardo.neri-calderon, syzkaller-bugs, Thomas Gleixner, the arch/x86 maintainers On Fri, Dec 1, 2017 at 9:19 AM, Dmitry Vyukov <dvyukov@google.com> wrote: > On Thu, Nov 30, 2017 at 9:41 PM, Eric Biggers <ebiggers3@gmail.com> wrote: >> On Thu, Nov 30, 2017 at 11:55:00AM -0800, syzbot wrote: >>> Call Trace: >>> __dump_stack lib/dump_stack.c:17 [inline] >>> dump_stack+0x194/0x257 lib/dump_stack.c:53 >>> ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6060 >>> __might_sleep+0x95/0x190 kernel/sched/core.c:6013 >>> __do_page_fault+0x350/0xc90 arch/x86/mm/fault.c:1372 >>> do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 >>> page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1094 >>> RIP: 0010:virt_to_cache mm/slab.c:400 [inline] >>> RIP: 0010:kfree+0xb2/0x250 mm/slab.c:3802 >>> RSP: 0018:ffff8801cc82f780 EFLAGS: 00010046 >>> RAX: 0000000000000000 RBX: ffff8801cc82f948 RCX: ffffffffffffffff >>> RDX: ffffea0007320bc0 RSI: 0000000000000000 RDI: ffff8801cc82f948 >>> RBP: ffff8801cc82f7a0 R08: ffffed003a54e4dc R09: 0000000000000000 >>> R10: 0000000000000001 R11: ffffed003a54e4db R12: 0000000000000286 >>> R13: 0000000000000000 R14: ffff8801cc82f948 R15: ffff8801cc82f8b0 >>> blkcipher_walk_done+0x72b/0xde0 crypto/blkcipher.c:139 >>> encrypt+0x50a/0xaf0 crypto/salsa20_generic.c:208 >>> skcipher_crypt_blkcipher crypto/skcipher.c:622 [inline] >>> skcipher_decrypt_blkcipher+0x213/0x310 crypto/skcipher.c:640 >>> crypto_skcipher_decrypt include/crypto/skcipher.h:463 [inline] >>> _skcipher_recvmsg crypto/algif_skcipher.c:144 [inline] >>> skcipher_recvmsg+0xa54/0xf20 crypto/algif_skcipher.c:165 >>> sock_recvmsg_nosec net/socket.c:805 [inline] >>> sock_recvmsg+0xc9/0x110 net/socket.c:812 >>> ___sys_recvmsg+0x29b/0x630 net/socket.c:2207 >>> __sys_recvmsg+0xe2/0x210 net/socket.c:2252 >>> SYSC_recvmsg net/socket.c:2264 [inline] >>> SyS_recvmsg+0x2d/0x50 net/socket.c:2259 >>> entry_SYSCALL_64_fastpath+0x1f/0x96 >> >> Yet another duplicate of the Salsa20 bug: >> >> #syz dup: WARNING: suspicious RCU usage (3) >> >> Looks like this one was incorrectly attributed to x86 rather than crypto? > > +Andrey, please check why syzbot has attributed this to x86. Addressed in https://github.com/google/syzkaller/pull/465 > >> kfree() is being called with preempt_count corrupted *and* with an uninitialized >> pointer, so it can cause quite a few different problems... > > Yeah, it's a bad one. Hopefully fixes will start to propagate soon. ^ permalink raw reply [flat|nested] 3+ messages in thread
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2017-11-30 20:41 ` BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:LINE Eric Biggers
2017-12-01 8:19 ` Dmitry Vyukov
2017-12-08 13:43 ` Andrey Konovalov
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