syzkaller login: [ 30.473958] BUG: Bad rss-counter state mm:0000000051791410 type:MM_FILEPAGES val:33 [ 30.474683] BUG: Bad rss-counter state mm:0000000051791410 type:MM_ANONPAGES val:22 [ 30.602189] ================================================================== [ 30.602859] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.603487] Read of size 8 at addr ffff88800df96df0 by task sshd/219 [ 30.603973] [ 30.604141] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.604724] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.605386] Call Trace: [ 30.605605] [ 30.605783] dump_stack_lvl+0x91/0xf0 [ 30.606091] print_report+0xcc/0x620 [ 30.606614] ? __virt_addr_valid+0x102/0x340 [ 30.606992] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.607395] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.607820] kasan_report+0xbe/0xf0 [ 30.608231] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.608569] vma_interval_tree_remove+0xc75/0xec0 [ 30.609003] vma_prepare+0xc54/0x11a0 [ 30.609314] __split_vma+0x5af/0x950 [ 30.609655] ? __pfx___split_vma+0x10/0x10 [ 30.610019] ? find_held_lock+0x2c/0x110 [ 30.610368] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.610760] ? lock_is_held_type+0x9f/0x120 [ 30.611111] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.611519] ? mtree_range_walk+0x632/0x900 [ 30.611918] ? mas_walk+0x5c7/0x7c0 [ 30.612266] do_vmi_munmap+0x1f1/0x2b0 [ 30.612616] mmap_region+0x1f9/0x2660 [ 30.612935] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.613277] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.613757] ? __pfx_lock_acquire+0x10/0x10 [ 30.614114] ? __pfx_mmap_region+0x10/0x10 [ 30.614473] ? security_mmap_addr+0x7d/0xa0 [ 30.614829] ? get_unmapped_area+0x1f5/0x3f0 [ 30.615190] do_mmap+0x854/0xf00 [ 30.615474] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.615789] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.616179] ksys_mmap_pgoff+0x3af/0x500 [ 30.616514] do_syscall_64+0x3f/0x90 [ 30.616853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.617317] RIP: 0033:0x7fce3a2c7d82 [ 30.617660] 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 [ 30.619082] RSP: 002b:00007ffecdebb178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.619669] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce3a2c7d82 [ 30.620325] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce39701000 [ 30.620917] RBP: 00007fce39701000 R08: 0000000000000009 R09: 0000000000001000 [ 30.621484] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b02237ec0 [ 30.622064] R13: 00007ffecdebb190 R14: 00007ffecdebb1c0 R15: 00007ffecdebb520 [ 30.622635] [ 30.622835] [ 30.622974] Allocated by task 212: [ 30.623264] kasan_save_stack+0x22/0x50 [ 30.623657] kasan_set_track+0x25/0x30 [ 30.623979] __kasan_slab_alloc+0x59/0x70 [ 30.624372] kmem_cache_alloc+0x16b/0x370 [ 30.624713] vm_area_dup+0x20/0x160 [ 30.625001] __split_vma+0x170/0x950 [ 30.625300] split_vma+0xc6/0x110 [ 30.625578] mprotect_fixup+0x8d2/0xb30 [ 30.625903] do_mprotect_pkey+0x87e/0xd40 [ 30.626241] __x64_sys_mprotect+0x78/0xc0 [ 30.626568] do_syscall_64+0x3f/0x90 [ 30.626869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.627282] [ 30.627417] Freed by task 212: [ 30.627666] kasan_save_stack+0x22/0x50 [ 30.627981] kasan_set_track+0x25/0x30 [ 30.628362] kasan_save_free_info+0x2b/0x50 [ 30.628710] __kasan_slab_free+0x10a/0x190 [ 30.629058] kmem_cache_free+0x10d/0x4d0 [ 30.629389] rcu_core+0x8c8/0x2860 [ 30.629673] __do_softirq+0x1b7/0x7d4 [ 30.629976] [ 30.630115] Last potentially related work creation: [ 30.630485] kasan_save_stack+0x22/0x50 [ 30.630808] __kasan_record_aux_stack+0x8e/0xa0 [ 30.631183] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.631637] remove_vma+0x139/0x170 [ 30.631939] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.632326] do_vmi_munmap+0x1f1/0x2b0 [ 30.632648] __vm_munmap+0x138/0x3a0 [ 30.632959] __x64_sys_munmap+0x59/0x80 [ 30.633277] do_syscall_64+0x3f/0x90 [ 30.633588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.634003] [ 30.634148] Second to last potentially related work creation: [ 30.634595] kasan_save_stack+0x22/0x50 [ 30.634911] __kasan_record_aux_stack+0x8e/0xa0 [ 30.635273] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.635693] remove_vma+0x139/0x170 [ 30.635990] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.636409] do_vmi_munmap+0x1f1/0x2b0 [ 30.636718] mmap_region+0x1f9/0x2660 [ 30.637022] do_mmap+0x854/0xf00 [ 30.637309] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.637625] ksys_mmap_pgoff+0x3af/0x500 [ 30.637971] do_syscall_64+0x3f/0x90 [ 30.638315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.638752] [ 30.638896] The buggy address belongs to the object at ffff88800df96d98 [ 30.638896] which belongs to the cache vm_area_struct of size 168 [ 30.639885] The buggy address is located 88 bytes inside of [ 30.639885] freed 168-byte region [ffff88800df96d98, ffff88800df96e40) [ 30.640867] [ 30.641016] The buggy address belongs to the physical page: [ 30.641456] page:00000000db1e75c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf96 [ 30.642145] memcg:ffff888013e67301 [ 30.642407] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.642817] page_type: 0xffffffff() [ 30.643097] raw: 0100000000000200 ffff8880087a0c80 ffffea000038af40 dead000000000004 [ 30.643683] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013e67301 [ 30.644302] page dumped because: kasan: bad access detected [ 30.644748] [ 30.644897] Memory state around the buggy address: [ 30.645297] ffff88800df96c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.645859] ffff88800df96d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.646398] >ffff88800df96d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.646916] ^ [ 30.647416] ffff88800df96e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.647959] ffff88800df96e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.648579] ================================================================== [ 30.649298] Disabling lock debugging due to kernel taint [ 32.083307] BUG: Bad rss-counter state mm:000000005c7c6d96 type:MM_FILEPAGES val:33 [ 32.083993] BUG: Bad rss-counter state mm:000000005c7c6d96 type:MM_ANONPAGES val:22 [ 32.478176] BUG: Bad rss-counter state mm:0000000074b9aade type:MM_FILEPAGES val:33 [ 32.478852] BUG: Bad rss-counter state mm:0000000074b9aade type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37273' (ECDSA) to the list of known hosts. 2023/06/21 09:19:52 fuzzer started 2023/06/21 09:19:53 dialing manager at localhost:36067 2023/06/21 09:19:53 checking machine... 2023/06/21 09:19:53 checking revisions... [ 33.072467] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:19:53 testing simple program... [ 33.111909] cgroup: Unknown subsys name 'net' [ 33.170996] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:19:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000002cbd78e5 RCX=0000000000000000 RDX=0000000000000002 RSI=ffffffff8219d5d5 RDI=0000000000000007 RBP=ffff88801610f678 RSP=ffff88801610f550 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=dffffc0000000000 R15=0000000000000002 RIP=ffffffff8219d5eb RFL=00000246 [---Z-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 00007f2e21426700 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=00007fb2fe121650 CR3=0000000019e22000 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=2032353a39313a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a39313a3930203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff813ad71f RDX=0000000000003ad7 RSI=0000000000003ad7 RDI=ffffffff864f854c RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007f110cf2e900 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=00007f110c3365f0 CR3=000000000c7ce000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f2d02332bf02a02e00000000000ae988 XMM05=7f5689ad761325bc0000000000134418 XMM06=806171799158d9670000000000132e98 XMM07=fb795ef6d65770560000000000122140 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000