syzkaller login: [ 31.326053] BUG: Bad rss-counter state mm:000000009015c794 type:MM_FILEPAGES val:33 [ 31.327245] BUG: Bad rss-counter state mm:000000009015c794 type:MM_ANONPAGES val:22 [ 31.466250] ================================================================== [ 31.467338] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.468470] Read of size 8 at addr ffff88800dbcadf0 by task sshd/219 [ 31.469608] [ 31.469848] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.470707] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.471703] Call Trace: [ 31.472025] [ 31.472309] dump_stack_lvl+0x91/0xf0 [ 31.472800] print_report+0xcc/0x620 [ 31.473302] ? __virt_addr_valid+0x102/0x340 [ 31.473858] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.474482] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.475096] kasan_report+0xbe/0xf0 [ 31.475572] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.476199] vma_interval_tree_remove+0xc75/0xec0 [ 31.476801] vma_prepare+0xc54/0x11a0 [ 31.477296] __split_vma+0x5af/0x950 [ 31.477776] ? __pfx___split_vma+0x10/0x10 [ 31.478308] ? find_held_lock+0x2c/0x110 [ 31.478841] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.479407] ? lock_is_held_type+0x9f/0x120 [ 31.479952] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.480560] ? mtree_range_walk+0x632/0x900 [ 31.481112] ? mas_walk+0x5c7/0x7c0 [ 31.481607] do_vmi_munmap+0x1f1/0x2b0 [ 31.482103] mmap_region+0x1f9/0x2660 [ 31.482590] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.483107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.483817] ? __pfx_lock_acquire+0x10/0x10 [ 31.484352] ? __pfx_mmap_region+0x10/0x10 [ 31.484887] ? security_mmap_addr+0x7d/0xa0 [ 31.485427] ? get_unmapped_area+0x1f5/0x3f0 [ 31.485975] do_mmap+0x854/0xf00 [ 31.486416] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.486911] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.487474] ksys_mmap_pgoff+0x3af/0x500 [ 31.487985] do_syscall_64+0x3f/0x90 [ 31.488464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.489117] RIP: 0033:0x7fb09e5ddd82 [ 31.489600] 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 [ 31.491751] RSP: 002b:00007ffcdf179ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.492671] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb09e5ddd82 [ 31.493531] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb09da17000 [ 31.494387] RBP: 00007fb09da17000 R08: 0000000000000009 R09: 0000000000001000 [ 31.495238] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be17ea6ec0 [ 31.496094] R13: 00007ffcdf179cc0 R14: 00007ffcdf179cf0 R15: 00007ffcdf17a050 [ 31.496964] [ 31.497264] [ 31.497479] Allocated by task 212: [ 31.497910] kasan_save_stack+0x22/0x50 [ 31.498416] kasan_set_track+0x25/0x30 [ 31.498911] __kasan_slab_alloc+0x59/0x70 [ 31.499436] kmem_cache_alloc+0x16b/0x370 [ 31.499960] vm_area_dup+0x20/0x160 [ 31.500418] __split_vma+0x170/0x950 [ 31.500886] split_vma+0xc6/0x110 [ 31.501345] mprotect_fixup+0x8d2/0xb30 [ 31.501849] do_mprotect_pkey+0x87e/0xd40 [ 31.502365] __x64_sys_mprotect+0x78/0xc0 [ 31.502883] do_syscall_64+0x3f/0x90 [ 31.503353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.504002] [ 31.504220] Freed by task 212: [ 31.504610] kasan_save_stack+0x22/0x50 [ 31.505113] kasan_set_track+0x25/0x30 [ 31.505621] kasan_save_free_info+0x2b/0x50 [ 31.506156] __kasan_slab_free+0x10a/0x190 [ 31.506689] kmem_cache_free+0x10d/0x4d0 [ 31.507198] rcu_core+0x8c8/0x2860 [ 31.507643] __do_softirq+0x1b7/0x7d4 [ 31.508116] [ 31.508330] Last potentially related work creation: [ 31.508917] kasan_save_stack+0x22/0x50 [ 31.509434] __kasan_record_aux_stack+0x8e/0xa0 [ 31.510011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.510710] remove_vma+0x139/0x170 [ 31.511163] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.511720] do_vmi_munmap+0x1f1/0x2b0 [ 31.512202] __vm_munmap+0x138/0x3a0 [ 31.512666] __x64_sys_munmap+0x59/0x80 [ 31.513174] do_syscall_64+0x3f/0x90 [ 31.513647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.514289] [ 31.514503] Second to last potentially related work creation: [ 31.515187] kasan_save_stack+0x22/0x50 [ 31.515700] __kasan_record_aux_stack+0x8e/0xa0 [ 31.516295] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.516944] remove_vma+0x139/0x170 [ 31.517409] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.517971] do_vmi_munmap+0x1f1/0x2b0 [ 31.518454] mmap_region+0x1f9/0x2660 [ 31.518943] do_mmap+0x854/0xf00 [ 31.519387] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.519885] ksys_mmap_pgoff+0x3af/0x500 [ 31.520392] do_syscall_64+0x3f/0x90 [ 31.520865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.521529] [ 31.521748] The buggy address belongs to the object at ffff88800dbcad98 [ 31.521748] which belongs to the cache vm_area_struct of size 168 [ 31.523253] The buggy address is located 88 bytes inside of [ 31.523253] freed 168-byte region [ffff88800dbcad98, ffff88800dbcae40) [ 31.524670] [ 31.524894] The buggy address belongs to the physical page: [ 31.525567] page:0000000057172047 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbca [ 31.526650] memcg:ffff88800c8ee001 [ 31.527087] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.527745] page_type: 0xffffffff() [ 31.528202] raw: 0100000000000200 ffff88800879fc80 ffffea000032a0c0 dead000000000006 [ 31.529124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c8ee001 [ 31.530072] page dumped because: kasan: bad access detected [ 31.530732] [ 31.530947] Memory state around the buggy address: [ 31.531539] ffff88800dbcac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.532410] ffff88800dbcad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.533295] >ffff88800dbcad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.534172] ^ [ 31.534981] ffff88800dbcae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.535835] ffff88800dbcae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.536706] ================================================================== [ 31.537670] Disabling lock debugging due to kernel taint [ 33.880042] BUG: Bad rss-counter state mm:00000000b5a0a84b type:MM_FILEPAGES val:33 [ 33.881260] BUG: Bad rss-counter state mm:00000000b5a0a84b type:MM_ANONPAGES val:22 [ 34.339041] BUG: Bad rss-counter state mm:0000000060ae0d45 type:MM_FILEPAGES val:33 [ 34.340048] BUG: Bad rss-counter state mm:0000000060ae0d45 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57105' (ECDSA) to the list of known hosts. 2023/06/20 03:21:15 fuzzer started 2023/06/20 03:21:15 dialing manager at localhost:44161 2023/06/20 03:21:15 checking machine... 2023/06/20 03:21:15 checking revisions... [ 35.115822] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:21:16 testing simple program... [ 35.164484] cgroup: Unknown subsys name 'net' [ 35.215568] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:21:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009825000 RCX=0000000000000000 RDX=ffff888010318000 RSI=ffffffff8199bfe2 RDI=ffff88801453e890 RBP=ffff88800dd177f0 RSP=ffff88800efcf938 R8 =0000000000000000 R9 =ffffed10028a7d12 R10=ffff88801453e893 R11=0000000000000000 R12=ffff88801453e800 R13=0000000000000000 R14=0000000000000000 R15=ffff88801453e940 RIP=ffffffff814c081b RFL=00000046 [---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 00007f2ddd191900 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=00007f2ddd746650 CR3=0000000018f98000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110028dce36 RSI=ffffffff8180b155 RDI=ffff8880146e7170 RBP=ffff8880146e71c8 RSP=ffff8880146e7100 R8 =0000000000000001 R9 =ffff8880146e71b0 R10=0000000000038001 R11=000000000000fc0f R12=ffff8880146e71d0 R13=ffff8880146e71b8 R14=ffff8880146e71b1 R15=ffff8880146e7170 RIP=ffffffff811306da RFL=00000216 [----AP-] 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 00007fe7c3b31900 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=00007fe7c2f98b50 CR3=000000000d694000 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=130772bb00f120c800000000000ae988 XMM05=c74fa437ab3119bc0000000000135a88 XMM06=dfcdbad4f1609c3700000000001348e8 XMM07=fb795ef6d657705600000000001239f0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000