syzkaller login: [ 34.666643] BUG: Bad rss-counter state mm:0000000092de4f84 type:MM_FILEPAGES val:33 [ 34.667658] BUG: Bad rss-counter state mm:0000000092de4f84 type:MM_ANONPAGES val:22 [ 34.830211] ================================================================== [ 34.831132] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.832085] Read of size 8 at addr ffff888009a1f880 by task sshd/221 [ 34.832876] [ 34.833253] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.834130] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.835126] Call Trace: [ 34.835495] [ 34.835786] dump_stack_lvl+0x91/0xf0 [ 34.836289] print_report+0xcc/0x620 [ 34.836811] ? __virt_addr_valid+0x102/0x340 [ 34.837373] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.837995] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.838620] kasan_report+0xbe/0xf0 [ 34.839103] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.839735] vma_interval_tree_remove+0xc75/0xec0 [ 34.840345] vma_prepare+0xc54/0x11a0 [ 34.840851] __split_vma+0x5af/0x950 [ 34.841330] ? __pfx___split_vma+0x10/0x10 [ 34.841875] ? find_held_lock+0x2c/0x110 [ 34.842405] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.842982] ? lock_is_held_type+0x9f/0x120 [ 34.843537] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.844150] ? mtree_range_walk+0x632/0x900 [ 34.844731] ? mas_walk+0x5c7/0x7c0 [ 34.845214] do_vmi_munmap+0x1f1/0x2b0 [ 34.845718] mmap_region+0x1f9/0x2660 [ 34.846216] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.846736] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.847455] ? __pfx_lock_acquire+0x10/0x10 [ 34.847995] ? __pfx_mmap_region+0x10/0x10 [ 34.848553] ? security_mmap_addr+0x7d/0xa0 [ 34.849100] ? get_unmapped_area+0x1f5/0x3f0 [ 34.849664] do_mmap+0x854/0xf00 [ 34.850112] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.850619] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.851187] ksys_mmap_pgoff+0x3af/0x500 [ 34.851703] do_syscall_64+0x3f/0x90 [ 34.852193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.852860] RIP: 0033:0x7fc69ae1ad82 [ 34.853320] 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 [ 34.855450] RSP: 002b:00007fff86f40b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.856352] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc69ae1ad82 [ 34.857207] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc69a254000 [ 34.858067] RBP: 00007fc69a254000 R08: 0000000000000009 R09: 0000000000001000 [ 34.858916] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573340b1ec0 [ 34.859762] R13: 00007fff86f40b90 R14: 00007fff86f40bc0 R15: 00007fff86f40f20 [ 34.860645] [ 34.860944] [ 34.861162] Allocated by task 214: [ 34.861591] kasan_save_stack+0x22/0x50 [ 34.862098] kasan_set_track+0x25/0x30 [ 34.862600] __kasan_slab_alloc+0x59/0x70 [ 34.863125] kmem_cache_alloc+0x16b/0x370 [ 34.863650] vm_area_dup+0x20/0x160 [ 34.864110] __split_vma+0x170/0x950 [ 34.864594] split_vma+0xc6/0x110 [ 34.865033] mprotect_fixup+0x8d2/0xb30 [ 34.865537] do_mprotect_pkey+0x87e/0xd40 [ 34.866059] __x64_sys_mprotect+0x78/0xc0 [ 34.866582] do_syscall_64+0x3f/0x90 [ 34.867057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.867699] [ 34.867915] Freed by task 214: [ 34.868311] kasan_save_stack+0x22/0x50 [ 34.868836] kasan_set_track+0x25/0x30 [ 34.869335] kasan_save_free_info+0x2b/0x50 [ 34.869874] __kasan_slab_free+0x10a/0x190 [ 34.870406] kmem_cache_free+0x10d/0x4d0 [ 34.870927] rcu_core+0x8c8/0x2860 [ 34.871374] __do_softirq+0x1b7/0x7d4 [ 34.871865] [ 34.872082] Last potentially related work creation: [ 34.872685] kasan_save_stack+0x22/0x50 [ 34.873192] __kasan_record_aux_stack+0x8e/0xa0 [ 34.873780] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.874548] remove_vma+0x139/0x170 [ 34.875013] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.875585] do_vmi_munmap+0x1f1/0x2b0 [ 34.876074] __vm_munmap+0x138/0x3a0 [ 34.876563] __x64_sys_munmap+0x59/0x80 [ 34.877062] do_syscall_64+0x3f/0x90 [ 34.877540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.878190] [ 34.878408] The buggy address belongs to the object at ffff888009a1f828 [ 34.878408] which belongs to the cache vm_area_struct of size 168 [ 34.879894] The buggy address is located 88 bytes inside of [ 34.879894] freed 168-byte region [ffff888009a1f828, ffff888009a1f8d0) [ 34.881339] [ 34.881565] The buggy address belongs to the physical page: [ 34.882228] page:00000000b3903fff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a1f [ 34.883313] memcg:ffff88800f3bd001 [ 34.883744] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.884406] page_type: 0xffffffff() [ 34.884863] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.885793] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f3bd001 [ 34.886702] page dumped because: kasan: bad access detected [ 34.887373] [ 34.887595] Memory state around the buggy address: [ 34.888181] ffff888009a1f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 34.889062] ffff888009a1f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.889938] >ffff888009a1f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.890787] ^ [ 34.891201] ffff888009a1f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.892055] ffff888009a1f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 34.892945] ================================================================== [ 34.893962] Disabling lock debugging due to kernel taint [ 36.942575] BUG: Bad rss-counter state mm:000000003a7b2146 type:MM_FILEPAGES val:33 [ 36.943770] BUG: Bad rss-counter state mm:000000003a7b2146 type:MM_ANONPAGES val:22 [ 37.480126] BUG: Bad rss-counter state mm:000000004622c4f6 type:MM_FILEPAGES val:33 [ 37.481383] BUG: Bad rss-counter state mm:000000004622c4f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4996' (ECDSA) to the list of known hosts. 2023/06/19 12:04:55 fuzzer started 2023/06/19 12:04:55 dialing manager at localhost:44161 2023/06/19 12:04:55 checking machine... 2023/06/19 12:04:55 checking revisions... [ 38.127817] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:04:55 testing simple program... [ 38.181616] cgroup: Unknown subsys name 'net' [ 38.217317] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:04:51 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff85652988 RCX=0000000080000000 RDX=1ffffffff0aca531 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880193a75b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800f0b5be0 RIP=ffffffff814c07f1 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 00007f3ec8cf9700 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=00007ffdc8bbee48 CR3=000000000c99c000 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=2034353a34303a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a34303a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8450b05e RBX=ffffffff813ad420 RCX=ffffffff8609fb01 RDX=1ffff1100d9e134f RSI=ffffffff8450b05e RDI=ffff88806cf09ae8 RBP=ffff88806cf09ab8 RSP=ffff88806cf09a18 R8 =ffffffff8609fb08 R9 =ffff88806cf09a60 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09ae8 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800e67e698 RIP=ffffffff813ad420 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 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=00007fedbf7b2000 CR3=000000000d996000 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=d7940c624cceb3bcf945a8a750bfa0fa XMM02=ec2efd57dc4c00df000000000011c9a8 XMM03=1284b2f7cd3d9141000000000011ca78 XMM04=3ca6d4dad86ce41f00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133a38 XMM06=0e232d28eef9e9b900000000001328a0 XMM07=e042d86d42eb936e00000000001241d8 XMM08=1284b2f7cd3d9141000000000011ca78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000