Hello, syzbot found the following issue on: HEAD commit: 73f3af7b4611 Merge branch 'akpm' (patches from Andrew) git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15d969e1300000 kernel config: https://syzkaller.appspot.com/x/.config?x=2fd902af77ff1e56 dashboard link: https://syzkaller.appspot.com/bug?extid=60f2f66b9e9cdeacb84d compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.1 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+60f2f66b9e9cdeacb84d@xxxxxxxxxxxxxxxxxxxxxxxxx RBP: 00007f2759f4b1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffdba342b3f R14: 00007f2759f4b300 R15: 0000000000022000 BUG: sleeping function called from invalid context at crypto/skcipher.c:482 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 19258, name: syz-executor.3 1 lock held by syz-executor.3/19258: #0: ffff88808b055120 (sk_lock-AF_ALG){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1613 [inline] #0: ffff88808b055120 (sk_lock-AF_ALG){+.+.}-{0:0}, at: skcipher_recvmsg+0xbb/0xea0 crypto/algif_skcipher.c:155 Preemption disabled at: [<ffffffff812edc95>] kernel_fpu_begin_mask+0x75/0x4c0 arch/x86/kernel/fpu/core.c:156 CPU: 1 PID: 19258 Comm: syz-executor.3 Not tainted 5.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1d3/0x29f lib/dump_stack.c:105 ___might_sleep+0x4e5/0x6b0 kernel/sched/core.c:9134 skcipher_walk_virt+0x80/0x6c0 crypto/skcipher.c:482 xts_crypt+0x8ce/0xb70 arch/x86/crypto/aesni-intel_glue.c:908 _skcipher_recvmsg crypto/algif_skcipher.c:138 [inline] skcipher_recvmsg+0xa74/0xea0 crypto/algif_skcipher.c:157 sock_recvmsg_nosec net/socket.c:943 [inline] sock_recvmsg net/socket.c:961 [inline] ____sys_recvmsg+0x293/0x5c0 net/socket.c:2611 ___sys_recvmsg net/socket.c:2653 [inline] do_recvmmsg+0x601/0x1560 net/socket.c:2747 __sys_recvmmsg net/socket.c:2826 [inline] __do_sys_recvmmsg net/socket.c:2849 [inline] __se_sys_recvmmsg net/socket.c:2842 [inline] __x64_sys_recvmmsg+0x17f/0x220 net/socket.c:2842 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2759f4b188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000001 RSI: 0000000020008340 RDI: 0000000000000004 RBP: 00007f2759f4b1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffdba342b3f R14: 00007f2759f4b300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 19258 at arch/x86/kernel/fpu/core.c:159 kernel_fpu_begin_mask+0x3fe/0x4c0 arch/x86/kernel/fpu/core.c:159 Modules linked in: CPU: 1 PID: 19258 Comm: syz-executor.3 Tainted: G W 5.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kernel_fpu_begin_mask+0x3fe/0x4c0 arch/x86/kernel/fpu/core.c:159 Code: 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 60 0f 85 b0 00 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 a2 57 51 00 <0f> 0b e9 3f fd ff ff e8 96 57 51 00 eb a1 e8 8f 57 51 00 db e3 eb RSP: 0018:ffffc900195a7340 EFLAGS: 00010246 RAX: ffffffff812ee01e RBX: 0000000000000001 RCX: 0000000000040000 RDX: ffffc9000fce5000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc900195a73f0 R08: ffffffff812edd57 R09: ffffed100702f923 R10: ffffed100702f923 R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffff920032b4e6c R14: 0000000000000002 R15: ffffc900195a74a0 FS: 00007f2759f4b700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000014a53ad CR3: 00000000327a9000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kernel_fpu_begin arch/x86/include/asm/fpu/api.h:40 [inline] xts_crypt+0x8f3/0xb70 arch/x86/crypto/aesni-intel_glue.c:912 _skcipher_recvmsg crypto/algif_skcipher.c:138 [inline] skcipher_recvmsg+0xa74/0xea0 crypto/algif_skcipher.c:157 sock_recvmsg_nosec net/socket.c:943 [inline] sock_recvmsg net/socket.c:961 [inline] ____sys_recvmsg+0x293/0x5c0 net/socket.c:2611 ___sys_recvmsg net/socket.c:2653 [inline] do_recvmmsg+0x601/0x1560 net/socket.c:2747 __sys_recvmmsg net/socket.c:2826 [inline] __do_sys_recvmmsg net/socket.c:2849 [inline] __se_sys_recvmmsg net/socket.c:2842 [inline] __x64_sys_recvmmsg+0x17f/0x220 net/socket.c:2842 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2759f4b188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000001 RSI: 0000000020008340 RDI: 0000000000000004 RBP: 00007f2759f4b1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffdba342b3f R14: 00007f2759f4b300 R15: 0000000000022000 --- This report is generated by a bot. 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