syzkaller login: [ 35.622071] BUG: Bad rss-counter state mm:000000003d059adc type:MM_FILEPAGES val:33 [ 35.623452] BUG: Bad rss-counter state mm:000000003d059adc type:MM_ANONPAGES val:22 [ 35.786524] ================================================================== [ 35.787439] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.788382] Read of size 8 at addr ffff88800c6cc5c8 by task sshd/218 [ 35.789307] [ 35.789539] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.790429] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.791434] Call Trace: [ 35.791757] [ 35.792060] dump_stack_lvl+0x91/0xf0 [ 35.792606] print_report+0xcc/0x620 [ 35.793100] ? __virt_addr_valid+0x102/0x340 [ 35.793688] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.794324] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.794965] kasan_report+0xbe/0xf0 [ 35.795452] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.796079] vma_interval_tree_remove+0xc75/0xec0 [ 35.796733] vma_prepare+0xc54/0x11a0 [ 35.797222] __split_vma+0x5af/0x950 [ 35.797726] ? __pfx___split_vma+0x10/0x10 [ 35.798269] ? find_held_lock+0x2c/0x110 [ 35.798794] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.799365] ? lock_is_held_type+0x9f/0x120 [ 35.799909] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.800566] ? mtree_range_walk+0x632/0x900 [ 35.801148] ? mas_walk+0x5c7/0x7c0 [ 35.801658] do_vmi_munmap+0x1f1/0x2b0 [ 35.802173] mmap_region+0x1f9/0x2660 [ 35.802673] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.803188] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.803912] ? __pfx_lock_acquire+0x10/0x10 [ 35.804450] ? __pfx_mmap_region+0x10/0x10 [ 35.805026] ? security_mmap_addr+0x7d/0xa0 [ 35.805567] ? get_unmapped_area+0x1f5/0x3f0 [ 35.806133] do_mmap+0x854/0xf00 [ 35.806576] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.807075] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.807649] ksys_mmap_pgoff+0x3af/0x500 [ 35.808159] do_syscall_64+0x3f/0x90 [ 35.808687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.809343] RIP: 0033:0x7f78a2ac7d82 [ 35.809828] 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 [ 35.811950] RSP: 002b:00007ffc7f1b37a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.812918] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78a2ac7d82 [ 35.813787] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78a1f01000 [ 35.814633] RBP: 00007f78a1f01000 R08: 0000000000000009 R09: 0000000000001000 [ 35.815486] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d69c1cb20 [ 35.816337] R13: 00007ffc7f1b37c0 R14: 00007ffc7f1b37f0 R15: 00007ffc7f1b3b50 [ 35.817235] [ 35.817531] [ 35.817772] Allocated by task 211: [ 35.818216] kasan_save_stack+0x22/0x50 [ 35.818723] kasan_set_track+0x25/0x30 [ 35.819215] __kasan_slab_alloc+0x59/0x70 [ 35.819743] kmem_cache_alloc+0x16b/0x370 [ 35.820264] vm_area_dup+0x20/0x160 [ 35.820764] __split_vma+0x170/0x950 [ 35.821231] split_vma+0xc6/0x110 [ 35.821689] mprotect_fixup+0x8d2/0xb30 [ 35.822190] do_mprotect_pkey+0x87e/0xd40 [ 35.822715] __x64_sys_mprotect+0x78/0xc0 [ 35.823246] do_syscall_64+0x3f/0x90 [ 35.823726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.824380] [ 35.824637] Freed by task 202: [ 35.825038] kasan_save_stack+0x22/0x50 [ 35.825551] kasan_set_track+0x25/0x30 [ 35.826076] kasan_save_free_info+0x2b/0x50 [ 35.826627] __kasan_slab_free+0x10a/0x190 [ 35.827162] kmem_cache_free+0x10d/0x4d0 [ 35.827674] rcu_core+0x8c8/0x2860 [ 35.828117] __do_softirq+0x1b7/0x7d4 [ 35.828635] [ 35.828857] Last potentially related work creation: [ 35.829446] kasan_save_stack+0x22/0x50 [ 35.829982] __kasan_record_aux_stack+0x8e/0xa0 [ 35.830561] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.831208] remove_vma+0x139/0x170 [ 35.831663] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.832231] do_vmi_munmap+0x1f1/0x2b0 [ 35.832758] __vm_munmap+0x138/0x3a0 [ 35.833227] __x64_sys_munmap+0x59/0x80 [ 35.833731] do_syscall_64+0x3f/0x90 [ 35.834212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.834859] [ 35.835076] Second to last potentially related work creation: [ 35.835768] kasan_save_stack+0x22/0x50 [ 35.836271] __kasan_record_aux_stack+0x8e/0xa0 [ 35.836885] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.837536] remove_vma+0x139/0x170 [ 35.838008] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.838581] do_vmi_munmap+0x1f1/0x2b0 [ 35.839069] mmap_region+0x1f9/0x2660 [ 35.839551] do_mmap+0x854/0xf00 [ 35.839989] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.840493] ksys_mmap_pgoff+0x3af/0x500 [ 35.841017] do_syscall_64+0x3f/0x90 [ 35.841496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.842159] [ 35.842380] The buggy address belongs to the object at ffff88800c6cc570 [ 35.842380] which belongs to the cache vm_area_struct of size 168 [ 35.843863] The buggy address is located 88 bytes inside of [ 35.843863] freed 168-byte region [ffff88800c6cc570, ffff88800c6cc618) [ 35.845316] [ 35.845534] The buggy address belongs to the physical page: [ 35.846212] page:0000000096e95e7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6cc [ 35.847309] memcg:ffff88800d8c9f01 [ 35.847741] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.848443] page_type: 0xffffffff() [ 35.848928] raw: 0100000000000200 ffff8880087a0c80 ffffea000038ad80 dead000000000007 [ 35.849882] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8c9f01 [ 35.850806] page dumped because: kasan: bad access detected [ 35.851476] [ 35.851695] Memory state around the buggy address: [ 35.852290] ffff88800c6cc480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.853183] ffff88800c6cc500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 35.854098] >ffff88800c6cc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.855002] ^ [ 35.855709] ffff88800c6cc600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 35.856645] ffff88800c6cc680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.857548] ================================================================== [ 35.858586] Disabling lock debugging due to kernel taint [ 37.815016] BUG: Bad rss-counter state mm:000000007229211a type:MM_FILEPAGES val:33 [ 37.816045] BUG: Bad rss-counter state mm:000000007229211a type:MM_ANONPAGES val:22 [ 38.303643] BUG: Bad rss-counter state mm:00000000388ffbd1 type:MM_FILEPAGES val:33 [ 38.304822] BUG: Bad rss-counter state mm:00000000388ffbd1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24306' (ECDSA) to the list of known hosts. 2023/06/20 21:59:53 fuzzer started 2023/06/20 21:59:54 dialing manager at localhost:36067 2023/06/20 21:59:54 checking machine... 2023/06/20 21:59:54 checking revisions... [ 38.945428] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:59:54 testing simple program... [ 39.001039] cgroup: Unknown subsys name 'net' [ 39.060125] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:59:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe7724eda8 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f2efb5e9510000055d54695c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888014601b40 RBX=ffff888015e2f5c0 RCX=ffffffff81132ffe RDX=ffff888015e2f550 RSI=0000000000000000 RDI=ffff888015e2f598 RBP=ffff888014601b40 RSP=ffff888015e2f4d8 R8 =ffff88801ac2c8f0 R9 =0000000000000000 R10=ffff888015e2f528 R11=736573203a296e6f R12=0000000000000000 R13=ffff888015e2f550 R14=ffff888015e2f570 R15=ffff888015e2f528 RIP=ffffffff81132ecc 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 00007f6431037700 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=00007f851dabd0b0 CR3=00000000164ac000 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=2033353a39353a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a39353a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000