BUG: stack guard page was hit at ffffc900063a7ff8 (stack is ffffc900063a8000..ffffc900063affff) kernel stack overflow (double-fault): 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 28936 Comm: syz-executor.3 Not tainted 5.10.110-syzkaller-01300-ge08dd85cc95e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:unwind_start arch/x86/include/asm/unwind.h:60 [inline] RIP: 0010:arch_stack_walk+0xd7/0x140 arch/x86/kernel/stacktrace.c:24 Code: eb 1b 65 48 8b 04 25 80 6d 02 00 4c 39 e0 74 0a 49 8b 8c 24 98 0e 00 00 eb 03 48 89 e9 48 8d bd 70 ff ff ff 4c 89 e6 4c 89 fa 94 27 06 00 83 bd 70 ff ff ff 00 74 36 48 8d 9d 70 ff ff ff 0f RSP: 0018:ffffc900063a8000 EFLAGS: 00010246 RAX: ffff888115c7cf00 RBX: 1ffff92000c7501e RCX: ffffc900063a8090 RDX: 0000000000000000 RSI: ffff888115c7cf00 RDI: ffffc900063a8000 RBP: ffffc900063a8090 R08: dffffc0000000000 R09: ffffc900063a8190 R10: 0000000000000002 R11: 0000000000000000 R12: ffff888115c7cf00 R13: ffffffff815b4c30 R14: ffffc900063a80e0 R15: 0000000000000000 FS: 00007f8919444700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc900063a7ff8 CR3: 000000010a270000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: stack_trace_save+0x12d/0x1f0 kernel/stacktrace.c:121 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:428 [inline] __kasan_slab_alloc+0xb2/0xe0 mm/kasan/common.c:461 kasan_slab_alloc include/linux/kasan.h:259 [inline] slab_post_alloc_hook mm/slab.h:583 [inline] slab_alloc_node mm/slub.c:2956 [inline] slab_alloc mm/slub.c:2964 [inline] kmem_cache_alloc+0x16c/0x300 mm/slub.c:2969 __d_alloc+0x2d/0x6b0 fs/dcache.c:1709 d_alloc fs/dcache.c:1788 [inline] d_alloc_parallel+0xe6/0x1330 fs/dcache.c:2540 __lookup_slow+0x14e/0x400 fs/namei.c:1613 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_slow+0x5a/0x80 fs/namei.c:1645 walk_component+0x425/0x5a0 fs/namei.c:1940 lookup_last fs/namei.c:2389 [inline] path_lookupat+0x18d/0x460 fs/namei.c:2413 filename_lookup+0x23f/0x6c0 fs/namei.c:2446 user_path_at_empty+0x40/0x50 fs/namei.c:2726 user_path_at include/linux/namei.h:59 [inline] do_mount fs/namespace.c:3239 [inline] __do_sys_mount fs/namespace.c:3450 [inline] __se_sys_mount+0x293/0x3c0 fs/namespace.c:3427 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3427 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f891a2ef0e9 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8919444168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f891a402030 RCX: 00007f891a2ef0e9 RDX: 0000000020000200 RSI: 0000000020000040 RDI: 0000000020000080 RBP: 00007f891a34908d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe692f168f R14: 00007f8919444300 R15: 0000000000022000 Modules linked in: ---[ end trace 84551c30c87a96e7 ]--- RIP: 0010:unwind_start arch/x86/include/asm/unwind.h:60 [inline] RIP: 0010:arch_stack_walk+0xd7/0x140 arch/x86/kernel/stacktrace.c:24 Code: eb 1b 65 48 8b 04 25 80 6d 02 00 4c 39 e0 74 0a 49 8b 8c 24 98 0e 00 00 eb 03 48 89 e9 48 8d bd 70 ff ff ff 4c 89 e6 4c 89 fa 94 27 06 00 83 bd 70 ff ff ff 00 74 36 48 8d 9d 70 ff ff ff 0f RSP: 0018:ffffc900063a8000 EFLAGS: 00010246 RAX: ffff888115c7cf00 RBX: 1ffff92000c7501e RCX: ffffc900063a8090 RDX: 0000000000000000 RSI: ffff888115c7cf00 RDI: ffffc900063a8000 RBP: ffffc900063a8090 R08: dffffc0000000000 R09: ffffc900063a8190 R10: 0000000000000002 R11: 0000000000000000 R12: ffff888115c7cf00 R13: ffffffff815b4c30 R14: ffffc900063a80e0 R15: 0000000000000000 FS: 00007f8919444700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc900063a7ff8 CR3: 000000010a270000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: eb 1b jmp 0x1d 2: 65 48 8b 04 25 80 6d mov %gs:0x26d80,%rax 9: 02 00 b: 4c 39 e0 cmp %r12,%rax e: 74 0a je 0x1a 10: 49 8b 8c 24 98 0e 00 mov 0xe98(%r12),%rcx 17: 00 18: eb 03 jmp 0x1d 1a: 48 89 e9 mov %rbp,%rcx 1d: 48 8d bd 70 ff ff ff lea -0x90(%rbp),%rdi 24: 4c 89 e6 mov %r12,%rsi 27: 4c 89 fa mov %r15,%rdx * 2a: e8 94 27 06 00 callq 0x627c3 <-- trapping instruction 2f: 83 bd 70 ff ff ff 00 cmpl $0x0,-0x90(%rbp) 36: 74 36 je 0x6e 38: 48 8d 9d 70 ff ff ff lea -0x90(%rbp),%rbx 3f: 0f .byte 0xf