syzkaller login: [ 30.537135] BUG: Bad rss-counter state mm:00000000bba11850 type:MM_FILEPAGES val:31 [ 30.538315] BUG: Bad rss-counter state mm:00000000bba11850 type:MM_ANONPAGES val:22 [ 30.669273] ================================================================== [ 30.670181] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.671144] Read of size 8 at addr ffff888019729880 by task sshd/219 [ 30.671908] [ 30.672126] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.673083] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.674104] Call Trace: [ 30.674424] [ 30.674716] dump_stack_lvl+0x91/0xf0 [ 30.675215] print_report+0xcc/0x620 [ 30.675697] ? __virt_addr_valid+0x102/0x340 [ 30.676254] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.676870] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.677485] kasan_report+0xbe/0xf0 [ 30.677958] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.678580] vma_interval_tree_remove+0xc75/0xec0 [ 30.679196] vma_prepare+0xc54/0x11a0 [ 30.679681] __split_vma+0x5af/0x950 [ 30.680159] ? __pfx___split_vma+0x10/0x10 [ 30.680694] ? find_held_lock+0x2c/0x110 [ 30.681215] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.681788] ? lock_is_held_type+0x9f/0x120 [ 30.682332] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.682970] ? mtree_range_walk+0x632/0x900 [ 30.683529] ? mas_walk+0x5c7/0x7c0 [ 30.684013] do_vmi_munmap+0x1f1/0x2b0 [ 30.684515] mmap_region+0x1f9/0x2660 [ 30.685002] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.685515] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.686237] ? __pfx_lock_acquire+0x10/0x10 [ 30.686781] ? __pfx_mmap_region+0x10/0x10 [ 30.687322] ? security_mmap_addr+0x7d/0xa0 [ 30.687859] ? get_unmapped_area+0x1f5/0x3f0 [ 30.688410] do_mmap+0x854/0xf00 [ 30.688852] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.689357] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.689923] ksys_mmap_pgoff+0x3af/0x500 [ 30.690436] do_syscall_64+0x3f/0x90 [ 30.690923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.691594] RIP: 0033:0x7f25d6c3ed82 [ 30.692057] 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 [ 30.694214] RSP: 002b:00007ffdeced9408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.695131] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25d6c3ed82 [ 30.695981] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25d6078000 [ 30.696828] RBP: 00007f25d6078000 R08: 0000000000000009 R09: 0000000000001000 [ 30.697672] R10: 0000000000000812 R11: 0000000000000206 R12: 000055954f170ec0 [ 30.698521] R13: 00007ffdeced9420 R14: 00007ffdeced9450 R15: 00007ffdeced97b0 [ 30.699405] [ 30.699698] [ 30.699918] Allocated by task 212: [ 30.700351] kasan_save_stack+0x22/0x50 [ 30.700861] kasan_set_track+0x25/0x30 [ 30.701365] __kasan_slab_alloc+0x59/0x70 [ 30.701895] kmem_cache_alloc+0x16b/0x370 [ 30.702417] vm_area_dup+0x20/0x160 [ 30.702876] __split_vma+0x170/0x950 [ 30.703361] split_vma+0xc6/0x110 [ 30.703804] mprotect_fixup+0x8d2/0xb30 [ 30.704355] do_mprotect_pkey+0x87e/0xd40 [ 30.704882] __x64_sys_mprotect+0x78/0xc0 [ 30.705407] do_syscall_64+0x3f/0x90 [ 30.705891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.706539] [ 30.706761] Freed by task 212: [ 30.707163] kasan_save_stack+0x22/0x50 [ 30.707669] kasan_set_track+0x25/0x30 [ 30.708163] kasan_save_free_info+0x2b/0x50 [ 30.708702] __kasan_slab_free+0x10a/0x190 [ 30.709244] kmem_cache_free+0x10d/0x4d0 [ 30.709762] rcu_core+0x8c8/0x2860 [ 30.710212] __do_softirq+0x1b7/0x7d4 [ 30.710688] [ 30.710906] Last potentially related work creation: [ 30.711511] kasan_save_stack+0x22/0x50 [ 30.712013] __kasan_record_aux_stack+0x8e/0xa0 [ 30.712592] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.713247] remove_vma+0x139/0x170 [ 30.713702] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.714268] do_vmi_munmap+0x1f1/0x2b0 [ 30.714831] __vm_munmap+0x138/0x3a0 [ 30.715312] __x64_sys_munmap+0x59/0x80 [ 30.715808] do_syscall_64+0x3f/0x90 [ 30.716337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.716985] [ 30.717210] The buggy address belongs to the object at ffff888019729828 [ 30.717210] which belongs to the cache vm_area_struct of size 168 [ 30.718690] The buggy address is located 88 bytes inside of [ 30.718690] freed 168-byte region [ffff888019729828, ffff8880197298d0) [ 30.720106] [ 30.720323] The buggy address belongs to the physical page: [ 30.720986] page:0000000067e4284e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19729 [ 30.722097] memcg:ffff8880093aaf01 [ 30.722529] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.723206] page_type: 0xffffffff() [ 30.723663] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.724590] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880093aaf01 [ 30.725508] page dumped because: kasan: bad access detected [ 30.726174] [ 30.726391] Memory state around the buggy address: [ 30.726991] ffff888019729780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.727857] ffff888019729800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.728729] >ffff888019729880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.729589] ^ [ 30.730009] ffff888019729900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.730872] ffff888019729980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.731753] ================================================================== [ 30.732683] Disabling lock debugging due to kernel taint [ 33.530624] BUG: Bad rss-counter state mm:00000000492a67de type:MM_FILEPAGES val:33 [ 33.531412] BUG: Bad rss-counter state mm:00000000492a67de type:MM_ANONPAGES val:22 [ 33.948646] BUG: Bad rss-counter state mm:000000000f93bac2 type:MM_FILEPAGES val:33 [ 33.949404] BUG: Bad rss-counter state mm:000000000f93bac2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32075' (ECDSA) to the list of known hosts. 2023/06/21 00:56:32 fuzzer started 2023/06/21 00:56:32 dialing manager at localhost:36067 2023/06/21 00:56:32 checking machine... 2023/06/21 00:56:32 checking revisions... [ 34.679419] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:56:32 testing simple program... [ 34.726861] cgroup: Unknown subsys name 'net' [ 34.782926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:56:32 Registers: info registers vcpu 0 RAX=ffffffff8180ca5a RBX=ffffffff813ad470 RCX=ffffffff86139701 RDX=1ffff110011b3f36 RSI=ffffffff8180ca5a RDI=ffff888008d9fa20 RBP=ffff888008d9f9f0 RSP=ffff888008d9f950 R8 =ffffffff86139748 R9 =ffff888008d9f998 R10=0000000000038001 R11=0000000000020f03 R12=ffff888008d9fa20 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800da75a00 RIP=ffffffff813ad474 RFL=00000286 [--S--P-] 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 0000000000000000 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=0000559e4fd0a050 CR3=0000000015d54000 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=36353a3030203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732031333a3635 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303439 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007ffdbab2a040 RCX=ffffffff8369cee5 RDX=ffff888014781b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888015c2f8d0 RSP=ffff888015c2f7b8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=63206e6f69737365 R12=ffff888015c2fe60 R13=0000000000000010 R14=0000000000000020 R15=0000000000000001 RIP=ffffffff814c0864 RFL=00000202 [-------] 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 00007fd05a7fb900 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=00007ff5decad650 CR3=000000000cc06000 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=00000000000000000000000000000000 XMM01=3620499aa1b1919b934973704991b5ae XMM02=eff9b2d0a8fce9cb000000000011a628 XMM03=2c67c8bc2e329bc3000000000011a750 XMM04=0d2239ad5eb5ce0700000000000ae988 XMM05=d4fe35fb7f4628260000000000132ac8 XMM06=806171799158d96700000000001318b8 XMM07=fb795ef6d65770560000000000121c10 XMM08=2c67c8bc2e329bc3000000000011a750 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000