syzkaller login: [ 31.009367] BUG: Bad rss-counter state mm:00000000070aa80a type:MM_FILEPAGES val:33 [ 31.010378] BUG: Bad rss-counter state mm:00000000070aa80a type:MM_ANONPAGES val:22 [ 31.177265] ================================================================== [ 31.178181] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.179121] Read of size 8 at addr ffff888016d91798 by task sshd/219 [ 31.179963] [ 31.180228] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.181109] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.182081] Call Trace: [ 31.182424] [ 31.182710] dump_stack_lvl+0x91/0xf0 [ 31.183200] print_report+0xcc/0x620 [ 31.183691] ? __virt_addr_valid+0x102/0x340 [ 31.184270] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.184891] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.185509] kasan_report+0xbe/0xf0 [ 31.185984] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.186613] vma_interval_tree_remove+0xc75/0xec0 [ 31.187221] vma_prepare+0xc54/0x11a0 [ 31.187705] __split_vma+0x5af/0x950 [ 31.188187] ? __pfx___split_vma+0x10/0x10 [ 31.188713] ? find_held_lock+0x2c/0x110 [ 31.189226] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.189786] ? lock_is_held_type+0x9f/0x120 [ 31.190324] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.190923] ? mtree_range_walk+0x632/0x900 [ 31.191476] ? mas_walk+0x5c7/0x7c0 [ 31.191968] do_vmi_munmap+0x1f1/0x2b0 [ 31.192455] mmap_region+0x1f9/0x2660 [ 31.192929] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.193436] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.194146] ? __pfx_lock_acquire+0x10/0x10 [ 31.194670] ? __pfx_mmap_region+0x10/0x10 [ 31.195200] ? security_mmap_addr+0x7d/0xa0 [ 31.195730] ? get_unmapped_area+0x1f5/0x3f0 [ 31.196288] do_mmap+0x854/0xf00 [ 31.196723] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.197217] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.197782] ksys_mmap_pgoff+0x3af/0x500 [ 31.198286] do_syscall_64+0x3f/0x90 [ 31.198762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.199400] RIP: 0033:0x7febe335ed82 [ 31.199863] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.202001] RSP: 002b:00007fff23a618c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.202895] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007febe335ed82 [ 31.203743] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007febe2798000 [ 31.204622] RBP: 00007febe2798000 R08: 0000000000000009 R09: 0000000000001000 [ 31.205459] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602d2454d90 [ 31.206298] R13: 00007fff23a618e0 R14: 00007fff23a61910 R15: 00007fff23a61c70 [ 31.207169] [ 31.207461] [ 31.207674] Allocated by task 212: [ 31.208122] kasan_save_stack+0x22/0x50 [ 31.208631] kasan_set_track+0x25/0x30 [ 31.209123] __kasan_slab_alloc+0x59/0x70 [ 31.209642] kmem_cache_alloc+0x16b/0x370 [ 31.210158] vm_area_dup+0x20/0x160 [ 31.210614] __split_vma+0x170/0x950 [ 31.211080] split_vma+0xc6/0x110 [ 31.211519] mprotect_fixup+0x8d2/0xb30 [ 31.212024] do_mprotect_pkey+0x87e/0xd40 [ 31.212554] __x64_sys_mprotect+0x78/0xc0 [ 31.213081] do_syscall_64+0x3f/0x90 [ 31.213553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214195] [ 31.214408] Freed by task 212: [ 31.214800] kasan_save_stack+0x22/0x50 [ 31.215299] kasan_set_track+0x25/0x30 [ 31.215806] kasan_save_free_info+0x2b/0x50 [ 31.216330] __kasan_slab_free+0x10a/0x190 [ 31.216856] kmem_cache_free+0x10d/0x4d0 [ 31.217362] rcu_core+0x8c8/0x2860 [ 31.217799] __do_softirq+0x1b7/0x7d4 [ 31.218276] [ 31.218489] Last potentially related work creation: [ 31.219069] kasan_save_stack+0x22/0x50 [ 31.219569] __kasan_record_aux_stack+0x8e/0xa0 [ 31.220143] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.220778] remove_vma+0x139/0x170 [ 31.221227] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.221779] do_vmi_munmap+0x1f1/0x2b0 [ 31.222256] __vm_munmap+0x138/0x3a0 [ 31.222718] __x64_sys_munmap+0x59/0x80 [ 31.223214] do_syscall_64+0x3f/0x90 [ 31.223690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.224333] [ 31.224547] The buggy address belongs to the object at ffff888016d91740 [ 31.224547] which belongs to the cache vm_area_struct of size 168 [ 31.226010] The buggy address is located 88 bytes inside of [ 31.226010] freed 168-byte region [ffff888016d91740, ffff888016d917e8) [ 31.227401] [ 31.227618] The buggy address belongs to the physical page: [ 31.228300] page:0000000063aea550 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d91 [ 31.229383] memcg:ffff888019eea301 [ 31.229809] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.230447] page_type: 0xffffffff() [ 31.230895] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.231832] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019eea301 [ 31.232728] page dumped because: kasan: bad access detected [ 31.233394] [ 31.233610] Memory state around the buggy address: [ 31.234190] ffff888016d91680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.235043] ffff888016d91700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.235892] >ffff888016d91780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.236749] ^ [ 31.237245] ffff888016d91800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.238088] ffff888016d91880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.238933] ================================================================== [ 31.239908] Disabling lock debugging due to kernel taint [ 33.978522] BUG: Bad rss-counter state mm:000000005d50ba0e type:MM_FILEPAGES val:33 [ 33.979603] BUG: Bad rss-counter state mm:000000005d50ba0e type:MM_ANONPAGES val:22 [ 34.463526] BUG: Bad rss-counter state mm:00000000d82dcae3 type:MM_FILEPAGES val:33 [ 34.464668] BUG: Bad rss-counter state mm:00000000d82dcae3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23434' (ECDSA) to the list of known hosts. 2023/06/21 06:40:21 fuzzer started 2023/06/21 06:40:21 dialing manager at localhost:36067 2023/06/21 06:40:21 checking machine... 2023/06/21 06:40:21 checking revisions... [ 35.161341] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:40:21 testing simple program... [ 35.210838] cgroup: Unknown subsys name 'net' [ 35.242869] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:40:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000040 RCX=ffffffff818ea63b RDX=ffff888016803680 RSI=0000000000000000 RDI=0000000000000004 RBP=0000000000000009 RSP=ffff888016e2fd80 R8 =0000000000000004 R9 =0000000000000009 R10=0000000000000040 R11=0000000000000000 R12=ffff888016ca34e0 R13=0000000000004000 R14=00007ffc808dffe4 R15=dffffc0000000000 RIP=ffffffff814c0860 RFL=00000287 [--S--PC] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f99f95ac900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f99f9b63618 CR3=000000000dd86000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fdf3047c000 CR3=000000000dbd4000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2030323a30343a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a30343a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000