------------[ cut here ]------------ WARNING: CPU: 3 PID: 10775 at mm/page_alloc.c:4545 __alloc_pages+0x424/0x2430 mm/page_alloc.c:4545 Modules linked in: CPU: 3 PID: 10775 Comm: syz-executor.2 Not tainted 6.8.0-rc7-syzkaller-00229-g10d48d70e82d #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:__alloc_pages+0x424/0x2430 mm/page_alloc.c:4545 Code: 0f 84 09 fe ff ff 80 ce 01 e9 01 fe ff ff 83 7c 24 04 0a 0f 86 f5 fc ff ff 80 3d e5 cd 87 0d 00 75 0b c6 05 dc cd 87 0d 01 90 <0f> 0b 90 45 31 f6 e9 82 fe ff ff e8 7c 7a 98 ff 84 c0 0f 85 75 fe RSP: 0018:ffffc90027e7f968 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000100000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000014 RDI: 0000000000040d40 RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000100000000 R11: 0000000000000001 R12: 0000000000040d40 R13: 1ffff92004fcff41 R14: 0000000100000000 R15: ffffffff8336a67a FS: 0000000000000000(0000) GS:ffff88802c500000(0063) knlGS:00000000f5e8fb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00007ffcf1b683e8 CR3: 0000000054d7e000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] __kmalloc_large_node+0x7f/0x1a0 mm/slub.c:3926 __do_kmalloc_node mm/slub.c:3969 [inline] __kmalloc.cold+0xc/0x61 mm/slub.c:3994 kmalloc include/linux/slab.h:594 [inline] kzalloc include/linux/slab.h:711 [inline] v9fs_fid_get_acl+0x7a/0x120 fs/9p/acl.c:32 __v9fs_get_acl fs/9p/acl.c:66 [inline] v9fs_get_acl+0x2e8/0x560 fs/9p/acl.c:93 v9fs_mount+0x65e/0xcd0 fs/9p/vfs_super.c:181 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8f/0x380 fs/super.c:1779 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x6e2/0x1f10 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __ia32_sys_mount+0x295/0x320 fs/namespace.c:3875 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7c/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x33/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7c/0x86 RIP: 0023:0xf7295579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5e8f5ac EFLAGS: 00000292 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020000040 RDX: 0000000020000b80 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi