syzkaller login: [ 30.313315] BUG: Bad rss-counter state mm:00000000e1591505 type:MM_FILEPAGES val:33 [ 30.314766] BUG: Bad rss-counter state mm:00000000e1591505 type:MM_ANONPAGES val:22 [ 30.466390] ================================================================== [ 30.467515] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.468476] Read of size 8 at addr ffff88800ed12c20 by task sshd/222 [ 30.469351] [ 30.469568] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.470432] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.471429] Call Trace: [ 30.471748] [ 30.472034] dump_stack_lvl+0x91/0xf0 [ 30.472519] print_report+0xcc/0x620 [ 30.472997] ? __virt_addr_valid+0x102/0x340 [ 30.473540] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.474154] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.474770] kasan_report+0xbe/0xf0 [ 30.475275] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.475897] vma_interval_tree_remove+0xc75/0xec0 [ 30.476492] vma_prepare+0xc54/0x11a0 [ 30.476961] __split_vma+0x5af/0x950 [ 30.477428] ? __pfx___split_vma+0x10/0x10 [ 30.477951] ? find_held_lock+0x2c/0x110 [ 30.478464] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.479030] ? lock_is_held_type+0x9f/0x120 [ 30.479562] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.480160] ? mtree_range_walk+0x632/0x900 [ 30.480705] ? mas_walk+0x5c7/0x7c0 [ 30.481175] do_vmi_munmap+0x1f1/0x2b0 [ 30.481661] mmap_region+0x1f9/0x2660 [ 30.482134] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.482640] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.483356] ? __pfx_lock_acquire+0x10/0x10 [ 30.483923] ? __pfx_mmap_region+0x10/0x10 [ 30.484475] ? security_mmap_addr+0x7d/0xa0 [ 30.485014] ? get_unmapped_area+0x1f5/0x3f0 [ 30.485569] do_mmap+0x854/0xf00 [ 30.486012] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.486508] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.487091] ksys_mmap_pgoff+0x3af/0x500 [ 30.487599] do_syscall_64+0x3f/0x90 [ 30.488080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.488728] RIP: 0033:0x7fdcfe2f9d82 [ 30.489186] 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 [ 30.491337] RSP: 002b:00007ffcaec30ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.492244] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdcfe2f9d82 [ 30.493100] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdcfd733000 [ 30.493947] RBP: 00007fdcfd733000 R08: 0000000000000009 R09: 0000000000001000 [ 30.494789] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561002415b20 [ 30.495658] R13: 00007ffcaec31010 R14: 00007ffcaec31040 R15: 00007ffcaec313a0 [ 30.496533] [ 30.496832] [ 30.497050] Allocated by task 215: [ 30.497486] kasan_save_stack+0x22/0x50 [ 30.497996] kasan_set_track+0x25/0x30 [ 30.498496] __kasan_slab_alloc+0x59/0x70 [ 30.499045] kmem_cache_alloc+0x16b/0x370 [ 30.499567] vm_area_dup+0x20/0x160 [ 30.500042] __split_vma+0x170/0x950 [ 30.500504] split_vma+0xc6/0x110 [ 30.500940] mprotect_fixup+0x8d2/0xb30 [ 30.501440] do_mprotect_pkey+0x87e/0xd40 [ 30.501964] __x64_sys_mprotect+0x78/0xc0 [ 30.502481] do_syscall_64+0x3f/0x90 [ 30.502975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.503619] [ 30.503836] Freed by task 215: [ 30.504230] kasan_save_stack+0x22/0x50 [ 30.504728] kasan_set_track+0x25/0x30 [ 30.505224] kasan_save_free_info+0x2b/0x50 [ 30.505749] __kasan_slab_free+0x10a/0x190 [ 30.506288] kmem_cache_free+0x10d/0x4d0 [ 30.506792] rcu_core+0x8c8/0x2860 [ 30.507250] __do_softirq+0x1b7/0x7d4 [ 30.507724] [ 30.507944] Last potentially related work creation: [ 30.508527] kasan_save_stack+0x22/0x50 [ 30.509032] __kasan_record_aux_stack+0x8e/0xa0 [ 30.509599] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.510251] remove_vma+0x139/0x170 [ 30.510696] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.511266] do_vmi_munmap+0x1f1/0x2b0 [ 30.511751] __vm_munmap+0x138/0x3a0 [ 30.512223] __x64_sys_munmap+0x59/0x80 [ 30.512714] do_syscall_64+0x3f/0x90 [ 30.513185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.513829] [ 30.514042] Second to last potentially related work creation: [ 30.514716] kasan_save_stack+0x22/0x50 [ 30.515237] __kasan_record_aux_stack+0x8e/0xa0 [ 30.515816] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.516467] remove_vma+0x139/0x170 [ 30.516921] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.517478] do_vmi_munmap+0x1f1/0x2b0 [ 30.517968] mmap_region+0x1f9/0x2660 [ 30.518442] do_mmap+0x854/0xf00 [ 30.518876] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.519360] ksys_mmap_pgoff+0x3af/0x500 [ 30.519856] do_syscall_64+0x3f/0x90 [ 30.520340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.520986] [ 30.521201] The buggy address belongs to the object at ffff88800ed12bc8 [ 30.521201] which belongs to the cache vm_area_struct of size 168 [ 30.522721] The buggy address is located 88 bytes inside of [ 30.522721] freed 168-byte region [ffff88800ed12bc8, ffff88800ed12c70) [ 30.524167] [ 30.524383] The buggy address belongs to the physical page: [ 30.525044] page:00000000a6e10323 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed12 [ 30.526152] memcg:ffff88800e262f01 [ 30.526576] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.527251] page_type: 0xffffffff() [ 30.527717] raw: 0100000000000200 ffff8880087a0c80 ffffea000026e1c0 dead000000000008 [ 30.528642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e262f01 [ 30.529554] page dumped because: kasan: bad access detected [ 30.530222] [ 30.530438] Memory state around the buggy address: [ 30.531039] ffff88800ed12b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.531889] ffff88800ed12b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.532743] >ffff88800ed12c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.533584] ^ [ 30.534123] ffff88800ed12c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.534995] ffff88800ed12d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.535847] ================================================================== [ 30.536912] Disabling lock debugging due to kernel taint [ 32.533200] BUG: Bad rss-counter state mm:00000000ee5b5a59 type:MM_FILEPAGES val:33 [ 32.534851] BUG: Bad rss-counter state mm:00000000ee5b5a59 type:MM_ANONPAGES val:22 [ 33.096939] BUG: Bad rss-counter state mm:00000000c0a04bc2 type:MM_FILEPAGES val:33 [ 33.098177] BUG: Bad rss-counter state mm:00000000c0a04bc2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44390' (ECDSA) to the list of known hosts. 2023/06/20 20:23:44 fuzzer started 2023/06/20 20:23:44 dialing manager at localhost:36067 2023/06/20 20:23:44 checking machine... 2023/06/20 20:23:44 checking revisions... [ 33.728246] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:23:44 testing simple program... [ 33.774597] cgroup: Unknown subsys name 'net' [ 33.825471] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:23:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88801695f4e8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=000009bd000009bd R12=0000000000000000 R13=ffffffff83ab1b1f R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff812d8a5e RFL=00000282 [--S----] 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 00007f2ef3a84900 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=00007f2ef403b618 CR3=0000000019b54000 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=ffff888008c04400 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=00007f1f49588b70 CR3=0000000009bb2000 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=5f2efefcafd01093dd45e979f68de7da XMM02=000000000011d200ec2efd57dc4c00df XMM03=00000000001219a0db93ae9e5522e5bb XMM04=fb8677a3f943588c00000000000ae988 XMM05=9a02d05b21dd32430000000000133900 XMM06=00c3ffa147b8d85700000000001329a0 XMM07=e042d86d42eb936e0000000000121c20 XMM08=db93ae9e5522e5bb000000000011d260 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000