syzkaller login: [ 40.199332] BUG: Bad rss-counter state mm:00000000bd529522 type:MM_FILEPAGES val:33 [ 40.200083] BUG: Bad rss-counter state mm:00000000bd529522 type:MM_ANONPAGES val:22 [ 40.340630] ================================================================== [ 40.341280] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.341940] Read of size 8 at addr ffff88800de80058 by task sshd/225 [ 40.342504] [ 40.342657] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.343265] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.343954] Call Trace: [ 40.344218] [ 40.344426] dump_stack_lvl+0x91/0xf0 [ 40.344771] print_report+0xcc/0x620 [ 40.345231] ? __virt_addr_valid+0x102/0x340 [ 40.345619] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.346113] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.346717] kasan_report+0xbe/0xf0 [ 40.347100] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.347564] vma_interval_tree_remove+0xc75/0xec0 [ 40.348016] vma_prepare+0xc54/0x11a0 [ 40.348406] __split_vma+0x5af/0x950 [ 40.348781] ? __pfx___split_vma+0x10/0x10 [ 40.349179] ? find_held_lock+0x2c/0x110 [ 40.349567] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.349997] ? lock_is_held_type+0x9f/0x120 [ 40.350414] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.350866] ? mtree_range_walk+0x632/0x900 [ 40.351270] ? mas_walk+0x5c7/0x7c0 [ 40.351620] do_vmi_munmap+0x1f1/0x2b0 [ 40.351987] mmap_region+0x1f9/0x2660 [ 40.352348] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.352737] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.353278] ? __pfx_lock_acquire+0x10/0x10 [ 40.353671] ? __pfx_mmap_region+0x10/0x10 [ 40.354093] ? security_mmap_addr+0x7d/0xa0 [ 40.354478] ? get_unmapped_area+0x1f5/0x3f0 [ 40.354894] do_mmap+0x854/0xf00 [ 40.355208] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.355568] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.355989] ksys_mmap_pgoff+0x3af/0x500 [ 40.356354] do_syscall_64+0x3f/0x90 [ 40.356712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.357230] RIP: 0033:0x7f10e6240d82 [ 40.357570] 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 [ 40.359182] RSP: 002b:00007ffe2600a278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.359877] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10e6240d82 [ 40.360526] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10e567a000 [ 40.361176] RBP: 00007f10e567a000 R08: 0000000000000009 R09: 0000000000001000 [ 40.361804] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c41416dec0 [ 40.362513] R13: 00007ffe2600a290 R14: 00007ffe2600a2c0 R15: 00007ffe2600a620 [ 40.363148] [ 40.363367] [ 40.363535] Allocated by task 218: [ 40.363853] kasan_save_stack+0x22/0x50 [ 40.364233] kasan_set_track+0x25/0x30 [ 40.364605] __kasan_slab_alloc+0x59/0x70 [ 40.364986] kmem_cache_alloc+0x16b/0x370 [ 40.365353] vm_area_dup+0x20/0x160 [ 40.365688] __split_vma+0x170/0x950 [ 40.366028] split_vma+0xc6/0x110 [ 40.366373] mprotect_fixup+0x8d2/0xb30 [ 40.366744] do_mprotect_pkey+0x87e/0xd40 [ 40.367130] __x64_sys_mprotect+0x78/0xc0 [ 40.367535] do_syscall_64+0x3f/0x90 [ 40.367892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.368382] [ 40.368538] Freed by task 203: [ 40.368818] kasan_save_stack+0x22/0x50 [ 40.369228] kasan_set_track+0x25/0x30 [ 40.369605] kasan_save_free_info+0x2b/0x50 [ 40.370028] __kasan_slab_free+0x10a/0x190 [ 40.370453] kmem_cache_free+0x10d/0x4d0 [ 40.370827] rcu_core+0x8c8/0x2860 [ 40.371154] __do_softirq+0x1b7/0x7d4 [ 40.371510] [ 40.371680] Last potentially related work creation: [ 40.372132] kasan_save_stack+0x22/0x50 [ 40.372504] __kasan_record_aux_stack+0x8e/0xa0 [ 40.372930] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.373395] remove_vma+0x139/0x170 [ 40.373725] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.374138] do_vmi_munmap+0x1f1/0x2b0 [ 40.374520] __vm_munmap+0x138/0x3a0 [ 40.374863] __x64_sys_munmap+0x59/0x80 [ 40.375209] do_syscall_64+0x3f/0x90 [ 40.375552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.376019] [ 40.376175] Second to last potentially related work creation: [ 40.376667] kasan_save_stack+0x22/0x50 [ 40.377038] __kasan_record_aux_stack+0x8e/0xa0 [ 40.377449] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.377918] remove_vma+0x139/0x170 [ 40.378283] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.378686] do_vmi_munmap+0x1f1/0x2b0 [ 40.379044] mmap_region+0x1f9/0x2660 [ 40.379404] do_mmap+0x854/0xf00 [ 40.379721] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.380102] ksys_mmap_pgoff+0x3af/0x500 [ 40.380475] do_syscall_64+0x3f/0x90 [ 40.380830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.381346] [ 40.381514] The buggy address belongs to the object at ffff88800de80000 [ 40.381514] which belongs to the cache vm_area_struct of size 168 [ 40.382642] The buggy address is located 88 bytes inside of [ 40.382642] freed 168-byte region [ffff88800de80000, ffff88800de800a8) [ 40.383689] [ 40.383845] The buggy address belongs to the physical page: [ 40.384344] page:0000000002182e29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde80 [ 40.385156] memcg:ffff88801410eb01 [ 40.385476] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.385946] page_type: 0xffffffff() [ 40.386306] raw: 0100000000000200 ffff88800879fc80 ffffea0000370f40 dead000000000008 [ 40.387003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801410eb01 [ 40.387689] page dumped because: kasan: bad access detected [ 40.388182] [ 40.388351] Memory state around the buggy address: [ 40.388779] ffff88800de7ff00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 40.389400] ffff88800de7ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.390043] >ffff88800de80000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.390709] ^ [ 40.391253] ffff88800de80080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 40.391868] ffff88800de80100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.392483] ================================================================== [ 40.393289] Disabling lock debugging due to kernel taint [ 42.470230] BUG: Bad rss-counter state mm:000000006b07798b type:MM_FILEPAGES val:33 [ 42.471024] BUG: Bad rss-counter state mm:000000006b07798b type:MM_ANONPAGES val:22 [ 42.867226] BUG: Bad rss-counter state mm:00000000810d2b6b type:MM_FILEPAGES val:33 [ 42.868003] BUG: Bad rss-counter state mm:00000000810d2b6b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13530' (ECDSA) to the list of known hosts. 2023/06/20 09:08:54 fuzzer started 2023/06/20 09:08:54 dialing manager at localhost:44161 2023/06/20 09:08:54 checking machine... 2023/06/20 09:08:54 checking revisions... [ 43.484854] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:08:55 testing simple program... [ 43.521735] cgroup: Unknown subsys name 'net' [ 43.566256] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:08:53 Registers: info registers vcpu 0 RAX=ffff88800cba2500 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000007 RDI=ffff88800da77f58 RBP=ffff88800da77f58 RSP=ffff88800da77f28 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=00007fc809066330 R15=0000000000000000 RIP=ffffffff8450b5e2 RFL=00000087 [--S--PC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc809bf0900 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=00007fc809066330 CR3=000000000cb52000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3bb1e9c69e11530a00000000000ae988 XMM05=97a6d7c5631f619a0000000000136268 XMM06=ae9b264101391a5b0000000000134ce8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000159b8067 RBX=ffff888009af1120 RCX=ffffffff8175d191 RDX=00000000159b8067 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88800e7768a0 RSP=ffff888014377b48 R8 =0000000000000006 R9 =00000000159b8067 R10=00000000159b8067 R11=0000000000000000 R12=ffff8880159b8ce8 R13=1ffff1100286ef6d R14=dffffc0000000000 R15=00007f55e299d000 RIP=ffffffff8175d19b RFL=00000293 [--S-A-C] 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 =0000 0000000000000000 00000000 00000000 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=00007f55e299ddb8 CR3=000000001d014000 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=2e6f732e6c736e62696c2f756e672d78 XMM02=00322e6f732e6c736e62696c2f756e67 XMM03=2d78756e696c2d34365f3638782f6269 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000