syzkaller login: [ 32.246130] BUG: Bad rss-counter state mm:000000002e5698b8 type:MM_FILEPAGES val:33 [ 32.247501] BUG: Bad rss-counter state mm:000000002e5698b8 type:MM_ANONPAGES val:22 [ 32.336891] ================================================================== [ 32.337784] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.338716] Read of size 8 at addr ffff88800de42ed8 by task sshd/221 [ 32.339623] [ 32.339838] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.340689] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.341679] Call Trace: [ 32.341993] [ 32.342277] dump_stack_lvl+0x91/0xf0 [ 32.342773] print_report+0xcc/0x620 [ 32.343265] ? __virt_addr_valid+0x102/0x340 [ 32.343836] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.344488] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.345104] kasan_report+0xbe/0xf0 [ 32.345584] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.346224] vma_interval_tree_remove+0xc75/0xec0 [ 32.346818] vma_prepare+0xc54/0x11a0 [ 32.347292] __split_vma+0x5af/0x950 [ 32.347766] ? __pfx___split_vma+0x10/0x10 [ 32.348288] ? find_held_lock+0x2c/0x110 [ 32.348799] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.349353] ? lock_is_held_type+0x9f/0x120 [ 32.349879] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.350482] ? mtree_range_walk+0x632/0x900 [ 32.351021] ? mas_walk+0x5c7/0x7c0 [ 32.351494] do_vmi_munmap+0x1f1/0x2b0 [ 32.351977] mmap_region+0x1f9/0x2660 [ 32.352450] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.352954] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.353662] ? __pfx_lock_acquire+0x10/0x10 [ 32.354197] ? __pfx_mmap_region+0x10/0x10 [ 32.354734] ? security_mmap_addr+0x7d/0xa0 [ 32.355261] ? get_unmapped_area+0x1f5/0x3f0 [ 32.355828] do_mmap+0x854/0xf00 [ 32.356267] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.356756] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.357316] ksys_mmap_pgoff+0x3af/0x500 [ 32.357819] do_syscall_64+0x3f/0x90 [ 32.358298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.358931] RIP: 0033:0x7f8472685d82 [ 32.359386] 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 [ 32.361505] RSP: 002b:00007ffe64d49088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.362405] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8472685d82 [ 32.363237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8471abf000 [ 32.364083] RBP: 00007f8471abf000 R08: 0000000000000009 R09: 0000000000001000 [ 32.364911] R10: 0000000000000812 R11: 0000000000000206 R12: 000056240c884980 [ 32.365744] R13: 00007ffe64d490a0 R14: 00007ffe64d490d0 R15: 00007ffe64d49430 [ 32.366598] [ 32.366889] [ 32.367105] Allocated by task 214: [ 32.367536] kasan_save_stack+0x22/0x50 [ 32.368031] kasan_set_track+0x25/0x30 [ 32.368518] __kasan_slab_alloc+0x59/0x70 [ 32.369038] kmem_cache_alloc+0x16b/0x370 [ 32.369554] vm_area_dup+0x20/0x160 [ 32.369998] __split_vma+0x170/0x950 [ 32.370455] split_vma+0xc6/0x110 [ 32.370886] mprotect_fixup+0x8d2/0xb30 [ 32.371397] do_mprotect_pkey+0x87e/0xd40 [ 32.371936] __x64_sys_mprotect+0x78/0xc0 [ 32.372455] do_syscall_64+0x3f/0x90 [ 32.372924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.373565] [ 32.373777] Freed by task 214: [ 32.374167] kasan_save_stack+0x22/0x50 [ 32.374672] kasan_set_track+0x25/0x30 [ 32.375166] kasan_save_free_info+0x2b/0x50 [ 32.375700] __kasan_slab_free+0x10a/0x190 [ 32.376225] kmem_cache_free+0x10d/0x4d0 [ 32.376731] rcu_core+0x8c8/0x2860 [ 32.377175] __do_softirq+0x1b7/0x7d4 [ 32.377643] [ 32.377856] Last potentially related work creation: [ 32.378442] kasan_save_stack+0x22/0x50 [ 32.378937] __kasan_record_aux_stack+0x8e/0xa0 [ 32.379507] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.380150] remove_vma+0x139/0x170 [ 32.380594] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.381145] do_vmi_munmap+0x1f1/0x2b0 [ 32.381623] __vm_munmap+0x138/0x3a0 [ 32.382085] __x64_sys_munmap+0x59/0x80 [ 32.382580] do_syscall_64+0x3f/0x90 [ 32.383051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.383697] [ 32.383909] The buggy address belongs to the object at ffff88800de42e80 [ 32.383909] which belongs to the cache vm_area_struct of size 168 [ 32.385350] The buggy address is located 88 bytes inside of [ 32.385350] freed 168-byte region [ffff88800de42e80, ffff88800de42f28) [ 32.386744] [ 32.386956] The buggy address belongs to the physical page: [ 32.387606] page:00000000033ea737 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde42 [ 32.388664] memcg:ffff88800e5f3301 [ 32.389083] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.389771] page_type: 0xffffffff() [ 32.390225] raw: 0100000000000200 ffff88800879fc80 ffffea0000374f40 dead000000000005 [ 32.391133] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5f3301 [ 32.392041] page dumped because: kasan: bad access detected [ 32.392692] [ 32.392903] Memory state around the buggy address: [ 32.393471] ffff88800de42d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.394316] ffff88800de42e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.395158] >ffff88800de42e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.396003] ^ [ 32.396725] ffff88800de42f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.397562] ffff88800de42f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.398405] ================================================================== [ 32.399519] Disabling lock debugging due to kernel taint [ 34.345091] BUG: Bad rss-counter state mm:0000000074680e89 type:MM_FILEPAGES val:33 [ 34.345998] BUG: Bad rss-counter state mm:0000000074680e89 type:MM_ANONPAGES val:22 [ 34.777687] BUG: Bad rss-counter state mm:00000000274175f3 type:MM_FILEPAGES val:33 [ 34.778754] BUG: Bad rss-counter state mm:00000000274175f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11560' (ECDSA) to the list of known hosts. 2023/06/19 20:25:36 fuzzer started 2023/06/19 20:25:36 dialing manager at localhost:44161 2023/06/19 20:25:36 checking machine... 2023/06/19 20:25:36 checking revisions... [ 35.469311] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:25:36 testing simple program... [ 35.531358] cgroup: Unknown subsys name 'net' [ 35.589719] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:25:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea00006bd8c0 RCX=0000000000000000 RDX=ffff888015cd0000 RSI=ffffffff81b47f72 RDI=0000000000000004 RBP=ffff88801935de00 RSP=ffff888015d3fa58 R8 =0000000000000004 R9 =000000000000005a R10=000000000000005a R11=736573203a296e6f R12=000000000000005a R13=000000000000005a R14=ffff88801935d978 R15=0000000000000000 RIP=ffffffff814c081b 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 00007f248ffff700 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=00007ffc0117e000 CR3=000000000ebf0000 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=2035333a35323a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a35323a3032203931 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007fb8caf25cc0 CR3=00000000139da000 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=0d34489938fa60a98f45626efc737c8d XMM02=000000000011cb08ec2efd57dc4c00df XMM03=0000000000124048c0978fde0aa62f7b XMM04=858d37b78eeee59100000000000ae988 XMM05=e4cb8bb95a7664b60000000000133b50 XMM06=a2dbb18af5e6648500000000001329b8 XMM07=e042d86d42eb936e00000000001242c8 XMM08=c0978fde0aa62f7b000000000011cb68 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000