syzkaller login: [ 30.159261] BUG: Bad rss-counter state mm:00000000c0a339f9 type:MM_FILEPAGES val:33 [ 30.160739] BUG: Bad rss-counter state mm:00000000c0a339f9 type:MM_ANONPAGES val:22 [ 30.306577] ================================================================== [ 30.307714] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.308719] Read of size 8 at addr ffff88800c770c20 by task sshd/222 [ 30.309658] [ 30.309876] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.310745] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.311753] Call Trace: [ 30.312072] [ 30.312358] dump_stack_lvl+0x91/0xf0 [ 30.312848] print_report+0xcc/0x620 [ 30.313337] ? __virt_addr_valid+0x102/0x340 [ 30.313893] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.314506] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.315150] kasan_report+0xbe/0xf0 [ 30.315628] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.316246] vma_interval_tree_remove+0xc75/0xec0 [ 30.316847] vma_prepare+0xc54/0x11a0 [ 30.317325] __split_vma+0x5af/0x950 [ 30.317795] ? __pfx___split_vma+0x10/0x10 [ 30.318326] ? find_held_lock+0x2c/0x110 [ 30.318846] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.319434] ? lock_is_held_type+0x9f/0x120 [ 30.319969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.320582] ? mtree_range_walk+0x632/0x900 [ 30.321132] ? mas_walk+0x5c7/0x7c0 [ 30.321607] do_vmi_munmap+0x1f1/0x2b0 [ 30.322100] mmap_region+0x1f9/0x2660 [ 30.322582] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.323130] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.323841] ? __pfx_lock_acquire+0x10/0x10 [ 30.324388] ? __pfx_mmap_region+0x10/0x10 [ 30.324918] ? security_mmap_addr+0x7d/0xa0 [ 30.325459] ? get_unmapped_area+0x1f5/0x3f0 [ 30.326008] do_mmap+0x854/0xf00 [ 30.326453] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.326955] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.327544] ksys_mmap_pgoff+0x3af/0x500 [ 30.328049] do_syscall_64+0x3f/0x90 [ 30.328539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.329191] RIP: 0033:0x7f54c5fbfd82 [ 30.329646] 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 [ 30.331804] RSP: 002b:00007fff57077988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.332744] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54c5fbfd82 [ 30.333627] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54c53f9000 [ 30.334502] RBP: 00007f54c53f9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.335371] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629dd31dd90 [ 30.336231] R13: 00007fff570779a0 R14: 00007fff570779d0 R15: 00007fff57077d30 [ 30.337123] [ 30.337430] [ 30.337736] Allocated by task 215: [ 30.338158] kasan_save_stack+0x22/0x50 [ 30.338657] kasan_set_track+0x25/0x30 [ 30.339160] __kasan_slab_alloc+0x59/0x70 [ 30.339680] kmem_cache_alloc+0x16b/0x370 [ 30.340189] vm_area_dup+0x20/0x160 [ 30.340637] __split_vma+0x170/0x950 [ 30.341098] split_vma+0xc6/0x110 [ 30.341536] mprotect_fixup+0x8d2/0xb30 [ 30.342032] do_mprotect_pkey+0x87e/0xd40 [ 30.342549] __x64_sys_mprotect+0x78/0xc0 [ 30.343069] do_syscall_64+0x3f/0x90 [ 30.343543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.344178] [ 30.344393] Freed by task 19: [ 30.344771] kasan_save_stack+0x22/0x50 [ 30.345274] kasan_set_track+0x25/0x30 [ 30.345760] kasan_save_free_info+0x2b/0x50 [ 30.346285] __kasan_slab_free+0x10a/0x190 [ 30.346808] kmem_cache_free+0x10d/0x4d0 [ 30.347319] rcu_core+0x8c8/0x2860 [ 30.347755] __do_softirq+0x1b7/0x7d4 [ 30.348224] [ 30.348440] Last potentially related work creation: [ 30.349015] kasan_save_stack+0x22/0x50 [ 30.349518] __kasan_record_aux_stack+0x8e/0xa0 [ 30.350081] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.350761] remove_vma+0x139/0x170 [ 30.351217] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.351767] do_vmi_munmap+0x1f1/0x2b0 [ 30.352248] __vm_munmap+0x138/0x3a0 [ 30.352711] __x64_sys_munmap+0x59/0x80 [ 30.353200] do_syscall_64+0x3f/0x90 [ 30.353668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.354305] [ 30.354520] Second to last potentially related work creation: [ 30.355202] kasan_save_stack+0x22/0x50 [ 30.355697] __kasan_record_aux_stack+0x8e/0xa0 [ 30.356266] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.356894] remove_vma+0x139/0x170 [ 30.357338] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.357885] do_vmi_munmap+0x1f1/0x2b0 [ 30.358367] mmap_region+0x1f9/0x2660 [ 30.358846] do_mmap+0x854/0xf00 [ 30.359285] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.359766] ksys_mmap_pgoff+0x3af/0x500 [ 30.360257] do_syscall_64+0x3f/0x90 [ 30.360723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.361365] [ 30.361577] The buggy address belongs to the object at ffff88800c770bc8 [ 30.361577] which belongs to the cache vm_area_struct of size 168 [ 30.363030] The buggy address is located 88 bytes inside of [ 30.363030] freed 168-byte region [ffff88800c770bc8, ffff88800c770c70) [ 30.364417] [ 30.364630] The buggy address belongs to the physical page: [ 30.365283] page:00000000baef9c12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc770 [ 30.366358] memcg:ffff88800ca8ca01 [ 30.366783] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.367478] page_type: 0xffffffff() [ 30.367922] raw: 0100000000000200 ffff8880087a0c80 ffffea00005103c0 dead000000000005 [ 30.368830] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca8ca01 [ 30.369725] page dumped because: kasan: bad access detected [ 30.370379] [ 30.370591] Memory state around the buggy address: [ 30.371183] ffff88800c770b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.372031] ffff88800c770b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.372869] >ffff88800c770c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.373705] ^ [ 30.374228] ffff88800c770c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.375085] ffff88800c770d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.375922] ================================================================== [ 30.376910] Disabling lock debugging due to kernel taint [ 32.491883] BUG: Bad rss-counter state mm:00000000e833992c type:MM_FILEPAGES val:33 [ 32.493041] BUG: Bad rss-counter state mm:00000000e833992c type:MM_ANONPAGES val:22 [ 32.893355] BUG: Bad rss-counter state mm:000000000ff51728 type:MM_FILEPAGES val:33 [ 32.894367] BUG: Bad rss-counter state mm:000000000ff51728 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8376' (ECDSA) to the list of known hosts. 2023/06/20 15:53:38 fuzzer started 2023/06/20 15:53:38 dialing manager at localhost:36067 2023/06/20 15:53:38 checking machine... 2023/06/20 15:53:38 checking revisions... [ 33.622229] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:53:38 testing simple program... [ 33.677675] cgroup: Unknown subsys name 'net' [ 33.725985] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:53:38 Registers: info registers vcpu 0 RAX=fffffbfff0fe6c8a RBX=fffffbfff0fe6c8b RCX=ffffffff818d5ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff87f36450 RBP=fffffbfff0fe6c8a RSP=ffff888009a476f8 R8 =0000000000000000 R9 =fffffbfff0fe6c8a R10=ffffffff87f36457 R11=3830306234386136 R12=0000000000000228 R13=0000000000000200 R14=ffffffff87f36450 R15=ffffffff87f36450 RIP=ffffffff8180f173 RFL=00000283 [--S---C] 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 00007f0538145900 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=00007f05375ab1d0 CR3=000000000c4f0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e132efe1bdb1386900000000000ae988 XMM05=ad03bf175b07f2780000000000133620 XMM06=00c3ffa147b8d85700000000001320a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83ab1b55 RDX=ffff888018d451c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880146cf500 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000ad R11=00000a9c00000a9c R12=0000000000000000 R13=00000000000000ad R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0860 RFL=00000283 [--S---C] 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 00007f036e85b900 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=00007f036ee12618 CR3=000000001652c000 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=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