syzkaller login: [ 31.301968] BUG: Bad rss-counter state mm:000000008970a1bf type:MM_FILEPAGES val:33 [ 31.303184] BUG: Bad rss-counter state mm:000000008970a1bf type:MM_ANONPAGES val:22 [ 31.341158] ================================================================== [ 31.342227] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.343438] Read of size 8 at addr ffff88801839c5c8 by task sshd/221 [ 31.344254] [ 31.344485] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.345434] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.346494] Call Trace: [ 31.346844] [ 31.347149] dump_stack_lvl+0x91/0xf0 [ 31.347674] print_report+0xcc/0x620 [ 31.348194] ? __virt_addr_valid+0x102/0x340 [ 31.348808] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.349461] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.350117] kasan_report+0xbe/0xf0 [ 31.350621] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.351286] vma_interval_tree_remove+0xc75/0xec0 [ 31.351925] vma_prepare+0xc54/0x11a0 [ 31.352427] __split_vma+0x5af/0x950 [ 31.352938] ? __pfx___split_vma+0x10/0x10 [ 31.353496] ? find_held_lock+0x2c/0x110 [ 31.354054] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.354659] ? lock_is_held_type+0x9f/0x120 [ 31.355244] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.355909] ? mtree_range_walk+0x632/0x900 [ 31.356512] ? mas_walk+0x5c7/0x7c0 [ 31.357058] do_vmi_munmap+0x1f1/0x2b0 [ 31.357604] mmap_region+0x1f9/0x2660 [ 31.358132] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.358701] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.359481] ? __pfx_lock_acquire+0x10/0x10 [ 31.360080] ? __pfx_mmap_region+0x10/0x10 [ 31.360657] ? security_mmap_addr+0x7d/0xa0 [ 31.361247] ? get_unmapped_area+0x1f5/0x3f0 [ 31.361859] do_mmap+0x854/0xf00 [ 31.362344] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.362890] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.363510] ksys_mmap_pgoff+0x3af/0x500 [ 31.364070] do_syscall_64+0x3f/0x90 [ 31.364599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.365310] RIP: 0033:0x7fe448c53d82 [ 31.365827] 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 [ 31.368233] RSP: 002b:00007fffd9b69088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.369254] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe448c53d82 [ 31.370204] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe44808d000 [ 31.371139] RBP: 00007fe44808d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.372081] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e826daec0 [ 31.373035] R13: 00007fffd9b690a0 R14: 00007fffd9b690d0 R15: 00007fffd9b69430 [ 31.373993] [ 31.374318] [ 31.374556] Allocated by task 214: [ 31.375025] kasan_save_stack+0x22/0x50 [ 31.375589] kasan_set_track+0x25/0x30 [ 31.376133] __kasan_slab_alloc+0x59/0x70 [ 31.376720] kmem_cache_alloc+0x16b/0x370 [ 31.377295] vm_area_dup+0x20/0x160 [ 31.377794] __split_vma+0x170/0x950 [ 31.378308] split_vma+0xc6/0x110 [ 31.378791] mprotect_fixup+0x8d2/0xb30 [ 31.379350] do_mprotect_pkey+0x87e/0xd40 [ 31.379925] __x64_sys_mprotect+0x78/0xc0 [ 31.380498] do_syscall_64+0x3f/0x90 [ 31.381047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.381753] [ 31.382064] Freed by task 214: [ 31.382496] kasan_save_stack+0x22/0x50 [ 31.383048] kasan_set_track+0x25/0x30 [ 31.383598] kasan_save_free_info+0x2b/0x50 [ 31.384187] __kasan_slab_free+0x10a/0x190 [ 31.384789] kmem_cache_free+0x10d/0x4d0 [ 31.385333] rcu_core+0x8c8/0x2860 [ 31.385806] __do_softirq+0x1b7/0x7d4 [ 31.386321] [ 31.386556] Last potentially related work creation: [ 31.387212] kasan_save_stack+0x22/0x50 [ 31.387773] __kasan_record_aux_stack+0x8e/0xa0 [ 31.388405] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.389093] remove_vma+0x139/0x170 [ 31.389588] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.390193] do_vmi_munmap+0x1f1/0x2b0 [ 31.390720] __vm_munmap+0x138/0x3a0 [ 31.391230] __x64_sys_munmap+0x59/0x80 [ 31.391764] do_syscall_64+0x3f/0x90 [ 31.392269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.392971] [ 31.393203] The buggy address belongs to the object at ffff88801839c570 [ 31.393203] which belongs to the cache vm_area_struct of size 168 [ 31.394818] The buggy address is located 88 bytes inside of [ 31.394818] freed 168-byte region [ffff88801839c570, ffff88801839c618) [ 31.396394] [ 31.396645] The buggy address belongs to the physical page: [ 31.397378] page:00000000c5889b6a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1839c [ 31.398600] memcg:ffff888016839601 [ 31.399074] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.399794] page_type: 0xffffffff() [ 31.400286] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.401331] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016839601 [ 31.402340] page dumped because: kasan: bad access detected [ 31.403076] [ 31.403318] Memory state around the buggy address: [ 31.403973] ffff88801839c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.404941] ffff88801839c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.405892] >ffff88801839c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.406840] ^ [ 31.407582] ffff88801839c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.408537] ffff88801839c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.409499] ================================================================== [ 31.410614] Disabling lock debugging due to kernel taint [ 33.704135] BUG: Bad rss-counter state mm:0000000071d314a2 type:MM_FILEPAGES val:33 [ 33.705388] BUG: Bad rss-counter state mm:0000000071d314a2 type:MM_ANONPAGES val:22 [ 34.152004] BUG: Bad rss-counter state mm:000000004eaf6ee2 type:MM_FILEPAGES val:33 [ 34.153162] BUG: Bad rss-counter state mm:000000004eaf6ee2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24633' (ECDSA) to the list of known hosts. 2023/06/20 02:25:56 fuzzer started 2023/06/20 02:25:56 dialing manager at localhost:44161 2023/06/20 02:25:56 checking machine... 2023/06/20 02:25:56 checking revisions... [ 34.767163] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:25:56 testing simple program... [ 34.814024] cgroup: Unknown subsys name 'net' [ 34.850686] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:25:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffff815a53f8 RDI=ffffc9000064e129 RBP=ffff88801479fd28 RSP=ffff88801479fc60 R8 =0000000000000006 R9 =0000000000000101 R10=000000000000010c R11=0000000000000000 R12=0000000000000055 R13=ffff88801479fd60 R14=0000000000000055 R15=ffffc9000064e128 RIP=ffffffff815a540d RFL=00000202 [-------] 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 00007fdd9dd6f900 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=00007fdd9d17ea40 CR3=000000000cac4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=80771f668fb6bbfe00000000000ae988 XMM05=e90b57cfe629da9f00000000001350f0 XMM06=e4cb8bb95a7664b60000000000133f88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800c1198d8 RBX=ffff88800f4832c8 RCX=1ffff11001e8511e RDX=dffffc0000000000 RSI=ffff88800c139450 RDI=ffff88800f4832f8 RBP=ffff888013f0f1a8 RSP=ffff888016e0fc58 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800c139318 R13=0000000000000000 R14=ffff88801a292af8 R15=ffff88801a292ab0 RIP=ffffffff81847508 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 00007f23631d6900 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=00007fff2a7de000 CR3=0000000010364000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000