syzkaller login: [ 36.489484] BUG: Bad rss-counter state mm:00000000563416f7 type:MM_FILEPAGES val:33 [ 36.491162] BUG: Bad rss-counter state mm:00000000563416f7 type:MM_ANONPAGES val:22 [ 36.663091] ================================================================== [ 36.664039] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.665108] Read of size 8 at addr ffff88800de7b4e0 by task sshd/220 [ 36.665892] [ 36.666119] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.666999] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.667993] Call Trace: [ 36.668347] [ 36.668640] dump_stack_lvl+0x91/0xf0 [ 36.669145] print_report+0xcc/0x620 [ 36.669641] ? __virt_addr_valid+0x102/0x340 [ 36.670203] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.670833] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.671468] kasan_report+0xbe/0xf0 [ 36.671956] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.672614] vma_interval_tree_remove+0xc75/0xec0 [ 36.673261] vma_prepare+0xc54/0x11a0 [ 36.673772] __split_vma+0x5af/0x950 [ 36.674280] ? __pfx___split_vma+0x10/0x10 [ 36.674855] ? find_held_lock+0x2c/0x110 [ 36.675416] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.676013] ? lock_is_held_type+0x9f/0x120 [ 36.676619] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.677265] ? mtree_range_walk+0x632/0x900 [ 36.677864] ? mas_walk+0x5c7/0x7c0 [ 36.678375] do_vmi_munmap+0x1f1/0x2b0 [ 36.678905] mmap_region+0x1f9/0x2660 [ 36.679425] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.679968] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.680747] ? __pfx_lock_acquire+0x10/0x10 [ 36.681327] ? __pfx_mmap_region+0x10/0x10 [ 36.681906] ? security_mmap_addr+0x7d/0xa0 [ 36.682486] ? get_unmapped_area+0x1f5/0x3f0 [ 36.683080] do_mmap+0x854/0xf00 [ 36.683560] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.684113] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.684714] ksys_mmap_pgoff+0x3af/0x500 [ 36.685255] do_syscall_64+0x3f/0x90 [ 36.685768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.686465] RIP: 0033:0x7fad813d4d82 [ 36.686957] 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 [ 36.689250] RSP: 002b:00007ffcdca58d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.690210] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad813d4d82 [ 36.691130] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad8080e000 [ 36.692035] RBP: 00007fad8080e000 R08: 0000000000000009 R09: 0000000000001000 [ 36.692960] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a668730d90 [ 36.693876] R13: 00007ffcdca58d80 R14: 00007ffcdca58db0 R15: 00007ffcdca59110 [ 36.694785] [ 36.695096] [ 36.695324] Allocated by task 213: [ 36.695787] kasan_save_stack+0x22/0x50 [ 36.696328] kasan_set_track+0x25/0x30 [ 36.696851] __kasan_slab_alloc+0x59/0x70 [ 36.697406] kmem_cache_alloc+0x16b/0x370 [ 36.697960] vm_area_dup+0x20/0x160 [ 36.698451] __split_vma+0x170/0x950 [ 36.698946] split_vma+0xc6/0x110 [ 36.699412] mprotect_fixup+0x8d2/0xb30 [ 36.699946] do_mprotect_pkey+0x87e/0xd40 [ 36.700514] __x64_sys_mprotect+0x78/0xc0 [ 36.701065] do_syscall_64+0x3f/0x90 [ 36.701571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.702254] [ 36.702481] Freed by task 19: [ 36.702893] kasan_save_stack+0x22/0x50 [ 36.703423] kasan_set_track+0x25/0x30 [ 36.703938] kasan_save_free_info+0x2b/0x50 [ 36.704530] __kasan_slab_free+0x10a/0x190 [ 36.705097] kmem_cache_free+0x10d/0x4d0 [ 36.705642] rcu_core+0x8c8/0x2860 [ 36.706117] __do_softirq+0x1b7/0x7d4 [ 36.706627] [ 36.706862] Last potentially related work creation: [ 36.707487] kasan_save_stack+0x22/0x50 [ 36.708028] __kasan_record_aux_stack+0x8e/0xa0 [ 36.708656] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.709344] remove_vma+0x139/0x170 [ 36.709829] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.710407] do_vmi_munmap+0x1f1/0x2b0 [ 36.710920] __vm_munmap+0x138/0x3a0 [ 36.711415] __x64_sys_munmap+0x59/0x80 [ 36.711935] do_syscall_64+0x3f/0x90 [ 36.712447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.713130] [ 36.713365] The buggy address belongs to the object at ffff88800de7b488 [ 36.713365] which belongs to the cache vm_area_struct of size 168 [ 36.714913] The buggy address is located 88 bytes inside of [ 36.714913] freed 168-byte region [ffff88800de7b488, ffff88800de7b530) [ 36.716446] [ 36.716673] The buggy address belongs to the physical page: [ 36.717370] page:000000004fa38c6d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde7b [ 36.718522] memcg:ffff88800dfc4101 [ 36.718973] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.719717] page_type: 0xffffffff() [ 36.720211] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 36.721181] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfc4101 [ 36.722129] page dumped because: kasan: bad access detected [ 36.722832] [ 36.723062] Memory state around the buggy address: [ 36.723672] ffff88800de7b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.724588] ffff88800de7b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 36.725493] >ffff88800de7b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.726390] ^ [ 36.727220] ffff88800de7b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 36.728178] ffff88800de7b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.729113] ================================================================== [ 36.730461] Disabling lock debugging due to kernel taint [ 38.652561] BUG: Bad rss-counter state mm:0000000089a0291a type:MM_FILEPAGES val:33 [ 38.653725] BUG: Bad rss-counter state mm:0000000089a0291a type:MM_ANONPAGES val:22 [ 38.963890] BUG: Bad rss-counter state mm:0000000008035e26 type:MM_FILEPAGES val:33 [ 38.964983] BUG: Bad rss-counter state mm:0000000008035e26 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15982' (ECDSA) to the list of known hosts. 2023/06/20 18:44:28 fuzzer started 2023/06/20 18:44:28 dialing manager at localhost:36067 2023/06/20 18:44:28 checking machine... 2023/06/20 18:44:28 checking revisions... [ 39.660527] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:44:28 testing simple program... [ 39.712745] cgroup: Unknown subsys name 'net' [ 39.770941] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:44:28 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000116cb0 RCX=00007fc9ca12f344 RDX=00007fff98223428 RSI=00007fff98223428 RDI=000055d167efb330 RBP=00007fff982234a8 RSP=00007fff98223420 R8 =0000000000000288 R9 =0000000000116cb0 R10=0000000000000002 R11=00007fc9c8ac9f90 R12=00007fc9c8aadcb0 R13=000055d167efa290 R14=0000000000000006 R15=00007fff98223430 RIP=00007fc9ca12f475 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc9c95ac900 00000000 00000000 GS =0000 0000000000000000 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=00007fc9c8aca000 CR3=000000000d55e000 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=b3285ca56c489dff000000000010a0e0 XMM01=1bef037b73dc948b7f42d533b60f3447 XMM02=ec2efd57dc4c00df000000000011adb0 XMM03=beb9776e1a3b2838000000000011ae80 XMM04=7053369efaeb936500000000000ae988 XMM05=5f938592053c6e640000000000132848 XMM06=4fda316b135da52b0000000000131578 XMM07=e042d86d42eb936e0000000000121e48 XMM08=beb9776e1a3b2838000000000011ae80 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fff64ff7788 CR3=0000000018e56000 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=2038323a34343a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a34343a3831203032 XMM08=7379732f646d65747379732f62696c2f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000