syzkaller login: [ 37.203518] BUG: Bad rss-counter state mm:00000000b5b53bd9 type:MM_FILEPAGES val:33 [ 37.204980] BUG: Bad rss-counter state mm:00000000b5b53bd9 type:MM_ANONPAGES val:22 [ 37.356621] ================================================================== [ 37.357702] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.358620] Read of size 8 at addr ffff888016a245c8 by task sshd/220 [ 37.359502] [ 37.359710] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.360515] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.361453] Call Trace: [ 37.361754] [ 37.362021] dump_stack_lvl+0x91/0xf0 [ 37.362479] print_report+0xcc/0x620 [ 37.362932] ? __virt_addr_valid+0x102/0x340 [ 37.363452] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.364035] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.364614] kasan_report+0xbe/0xf0 [ 37.365066] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.365662] vma_interval_tree_remove+0xc75/0xec0 [ 37.366248] vma_prepare+0xc54/0x11a0 [ 37.366725] __split_vma+0x5af/0x950 [ 37.367188] ? __pfx___split_vma+0x10/0x10 [ 37.367707] ? find_held_lock+0x2c/0x110 [ 37.368222] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.368773] ? lock_is_held_type+0x9f/0x120 [ 37.369333] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.369936] ? mtree_range_walk+0x632/0x900 [ 37.370474] ? mas_walk+0x5c7/0x7c0 [ 37.370948] do_vmi_munmap+0x1f1/0x2b0 [ 37.371433] mmap_region+0x1f9/0x2660 [ 37.371906] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.372418] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.373124] ? __pfx_lock_acquire+0x10/0x10 [ 37.373651] ? __pfx_mmap_region+0x10/0x10 [ 37.374188] ? security_mmap_addr+0x7d/0xa0 [ 37.374713] ? get_unmapped_area+0x1f5/0x3f0 [ 37.375267] do_mmap+0x854/0xf00 [ 37.375691] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.376179] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.376733] ksys_mmap_pgoff+0x3af/0x500 [ 37.377234] do_syscall_64+0x3f/0x90 [ 37.377721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.378358] RIP: 0033:0x7f8430d24d82 [ 37.378807] 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 [ 37.380905] RSP: 002b:00007ffc3d8959f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.381804] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8430d24d82 [ 37.382634] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f843015e000 [ 37.383464] RBP: 00007f843015e000 R08: 0000000000000009 R09: 0000000000001000 [ 37.384295] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c018c8dd90 [ 37.385130] R13: 00007ffc3d895a10 R14: 00007ffc3d895a40 R15: 00007ffc3d895da0 [ 37.385981] [ 37.386268] [ 37.386476] Allocated by task 213: [ 37.386893] kasan_save_stack+0x22/0x50 [ 37.387382] kasan_set_track+0x25/0x30 [ 37.387878] __kasan_slab_alloc+0x59/0x70 [ 37.388393] kmem_cache_alloc+0x16b/0x370 [ 37.388900] vm_area_dup+0x20/0x160 [ 37.389373] __split_vma+0x170/0x950 [ 37.389829] split_vma+0xc6/0x110 [ 37.390262] mprotect_fixup+0x8d2/0xb30 [ 37.390753] do_mprotect_pkey+0x87e/0xd40 [ 37.391269] __x64_sys_mprotect+0x78/0xc0 [ 37.391783] do_syscall_64+0x3f/0x90 [ 37.392253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.392886] [ 37.393104] Freed by task 213: [ 37.393504] kasan_save_stack+0x22/0x50 [ 37.394008] kasan_set_track+0x25/0x30 [ 37.394482] kasan_save_free_info+0x2b/0x50 [ 37.395010] __kasan_slab_free+0x10a/0x190 [ 37.395534] kmem_cache_free+0x10d/0x4d0 [ 37.396047] rcu_core+0x8c8/0x2860 [ 37.396482] __do_softirq+0x1b7/0x7d4 [ 37.396961] [ 37.397176] Last potentially related work creation: [ 37.397757] kasan_save_stack+0x22/0x50 [ 37.398254] __kasan_record_aux_stack+0x8e/0xa0 [ 37.398824] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.399455] remove_vma+0x139/0x170 [ 37.399895] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.400514] do_vmi_munmap+0x1f1/0x2b0 [ 37.400992] __vm_munmap+0x138/0x3a0 [ 37.401460] __x64_sys_munmap+0x59/0x80 [ 37.401946] do_syscall_64+0x3f/0x90 [ 37.402408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.403040] [ 37.403247] The buggy address belongs to the object at ffff888016a24570 [ 37.403247] which belongs to the cache vm_area_struct of size 168 [ 37.404702] The buggy address is located 88 bytes inside of [ 37.404702] freed 168-byte region [ffff888016a24570, ffff888016a24618) [ 37.406158] [ 37.406372] The buggy address belongs to the physical page: [ 37.407041] page:000000001cc1354d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a24 [ 37.408169] memcg:ffff888019e56a01 [ 37.408601] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.409261] page_type: 0xffffffff() [ 37.409731] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.410689] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e56a01 [ 37.411619] page dumped because: kasan: bad access detected [ 37.412310] [ 37.412532] Memory state around the buggy address: [ 37.413148] ffff888016a24480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.414043] ffff888016a24500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 37.414917] >ffff888016a24580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.415788] ^ [ 37.416458] ffff888016a24600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 37.417329] ffff888016a24680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.418235] ================================================================== [ 37.419185] Disabling lock debugging due to kernel taint [ 39.791047] BUG: Bad rss-counter state mm:00000000767fe534 type:MM_FILEPAGES val:33 [ 39.791544] BUG: Bad rss-counter state mm:00000000767fe534 type:MM_ANONPAGES val:22 [ 40.235292] BUG: Bad rss-counter state mm:00000000f4f5b2e0 type:MM_FILEPAGES val:33 [ 40.236547] BUG: Bad rss-counter state mm:00000000f4f5b2e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28426' (ECDSA) to the list of known hosts. 2023/06/19 12:28:19 fuzzer started 2023/06/19 12:28:19 dialing manager at localhost:44161 2023/06/19 12:28:19 checking machine... 2023/06/19 12:28:19 checking revisions... [ 40.891308] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:28:19 testing simple program... [ 40.945667] cgroup: Unknown subsys name 'net' [ 41.032574] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:28:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180cd09 RCX=ffffffff86137501 RDX=1ffff11002b6ef10 RSI=0000000000000000 RDI=ffffffff8180cd09 RBP=ffffffff8180cd09 RSP=ffff888015b777d0 R8 =ffffffff86137542 R9 =ffff888015b77868 R10=0000000000038001 R11=0000000000020d8a R12=ffff888015b778f0 R13=0000000000000000 R14=ffff8880183c8000 R15=0000000000092cc0 RIP=ffffffff811fc6f7 RFL=00000296 [--S-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 00007fce81536900 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=00007fce81aee0b0 CR3=000000000d8e6000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f77aadeb760 CR3=000000000c6b4000 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=c8ed0543615836af814d8f9a287afbb3 XMM02=ec2efd57dc4c00df000000000011c880 XMM03=7856a7e399b6a01a000000000011c950 XMM04=6390c3be33667dfb00000000000ae988 XMM05=f0a6da0e7e3504980000000000134228 XMM06=4fda316b135da52b0000000000133c20 XMM07=e042d86d42eb936e0000000000124450 XMM08=7856a7e399b6a01a000000000011c950 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000