syzkaller login: [ 33.631173] BUG: Bad rss-counter state mm:000000002c75e5e8 type:MM_FILEPAGES val:33 [ 33.632369] BUG: Bad rss-counter state mm:000000002c75e5e8 type:MM_ANONPAGES val:22 [ 33.774398] ================================================================== [ 33.775309] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.776233] Read of size 8 at addr ffff88800e166ed8 by task sshd/220 [ 33.776996] [ 33.777216] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.778171] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.779173] Call Trace: [ 33.779496] [ 33.779804] dump_stack_lvl+0x91/0xf0 [ 33.780287] print_report+0xcc/0x620 [ 33.780769] ? __virt_addr_valid+0x102/0x340 [ 33.781320] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.781936] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.782554] kasan_report+0xbe/0xf0 [ 33.783038] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.783662] vma_interval_tree_remove+0xc75/0xec0 [ 33.784269] vma_prepare+0xc54/0x11a0 [ 33.784747] __split_vma+0x5af/0x950 [ 33.785222] ? __pfx___split_vma+0x10/0x10 [ 33.785745] ? find_held_lock+0x2c/0x110 [ 33.786268] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.786839] ? lock_is_held_type+0x9f/0x120 [ 33.787379] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.787987] ? mtree_range_walk+0x632/0x900 [ 33.788536] ? mas_walk+0x5c7/0x7c0 [ 33.789011] do_vmi_munmap+0x1f1/0x2b0 [ 33.789497] mmap_region+0x1f9/0x2660 [ 33.789979] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.790496] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.791220] ? __pfx_lock_acquire+0x10/0x10 [ 33.791749] ? __pfx_mmap_region+0x10/0x10 [ 33.792272] ? security_mmap_addr+0x7d/0xa0 [ 33.792794] ? get_unmapped_area+0x1f5/0x3f0 [ 33.793341] do_mmap+0x854/0xf00 [ 33.793780] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.794271] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.794849] ksys_mmap_pgoff+0x3af/0x500 [ 33.795360] do_syscall_64+0x3f/0x90 [ 33.795840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.796481] RIP: 0033:0x7f31b7274d82 [ 33.796937] 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 [ 33.799046] RSP: 002b:00007ffcf8689d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.799945] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31b7274d82 [ 33.800786] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31b66ae000 [ 33.801624] RBP: 00007f31b66ae000 R08: 0000000000000009 R09: 0000000000001000 [ 33.802469] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560fde6d8d90 [ 33.803337] R13: 00007ffcf8689d60 R14: 00007ffcf8689d90 R15: 00007ffcf868a0f0 [ 33.804190] [ 33.804480] [ 33.804695] Allocated by task 213: [ 33.805129] kasan_save_stack+0x22/0x50 [ 33.805638] kasan_set_track+0x25/0x30 [ 33.806133] __kasan_slab_alloc+0x59/0x70 [ 33.806670] kmem_cache_alloc+0x16b/0x370 [ 33.807191] vm_area_dup+0x20/0x160 [ 33.807644] __split_vma+0x170/0x950 [ 33.808114] split_vma+0xc6/0x110 [ 33.808554] mprotect_fixup+0x8d2/0xb30 [ 33.809051] do_mprotect_pkey+0x87e/0xd40 [ 33.809575] __x64_sys_mprotect+0x78/0xc0 [ 33.810093] do_syscall_64+0x3f/0x90 [ 33.810585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.811233] [ 33.811450] Freed by task 13: [ 33.811835] kasan_save_stack+0x22/0x50 [ 33.812342] kasan_set_track+0x25/0x30 [ 33.812834] kasan_save_free_info+0x2b/0x50 [ 33.813368] __kasan_slab_free+0x10a/0x190 [ 33.813901] kmem_cache_free+0x10d/0x4d0 [ 33.814413] rcu_core+0x8c8/0x2860 [ 33.814867] __do_softirq+0x1b7/0x7d4 [ 33.815345] [ 33.815557] Last potentially related work creation: [ 33.816137] kasan_save_stack+0x22/0x50 [ 33.816645] __kasan_record_aux_stack+0x8e/0xa0 [ 33.817223] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.817863] remove_vma+0x139/0x170 [ 33.818319] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.818876] do_vmi_munmap+0x1f1/0x2b0 [ 33.819360] __vm_munmap+0x138/0x3a0 [ 33.819836] __x64_sys_munmap+0x59/0x80 [ 33.820334] do_syscall_64+0x3f/0x90 [ 33.820805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.821442] [ 33.821658] The buggy address belongs to the object at ffff88800e166e80 [ 33.821658] which belongs to the cache vm_area_struct of size 168 [ 33.823177] The buggy address is located 88 bytes inside of [ 33.823177] freed 168-byte region [ffff88800e166e80, ffff88800e166f28) [ 33.824642] [ 33.824865] The buggy address belongs to the physical page: [ 33.825536] page:0000000093be769b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe166 [ 33.826643] memcg:ffff888019465601 [ 33.827081] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.827742] page_type: 0xffffffff() [ 33.828207] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 33.829147] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019465601 [ 33.830068] page dumped because: kasan: bad access detected [ 33.830768] [ 33.830986] Memory state around the buggy address: [ 33.831579] ffff88800e166d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.832438] ffff88800e166e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 33.833306] >ffff88800e166e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.834161] ^ [ 33.834900] ffff88800e166f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 33.835785] ffff88800e166f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.836648] ================================================================== [ 33.837640] Disabling lock debugging due to kernel taint [ 35.962047] BUG: Bad rss-counter state mm:000000006ee2d64d type:MM_FILEPAGES val:33 [ 35.963626] BUG: Bad rss-counter state mm:000000006ee2d64d type:MM_ANONPAGES val:22 [ 36.429318] BUG: Bad rss-counter state mm:00000000ab5fae59 type:MM_FILEPAGES val:33 [ 36.430485] BUG: Bad rss-counter state mm:00000000ab5fae59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59564' (ECDSA) to the list of known hosts. 2023/06/20 06:00:11 fuzzer started 2023/06/20 06:00:11 dialing manager at localhost:44161 2023/06/20 06:00:11 checking machine... 2023/06/20 06:00:11 checking revisions... [ 37.156452] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:00:12 testing simple program... [ 37.202468] cgroup: Unknown subsys name 'net' [ 37.248111] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:00:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888010227ae0 RSI=ffff888010227b30 RDI=ffff888010227ae8 RBP=0000000000000000 RSP=ffff8880102279d8 R8 =0000000000000001 R9 =ffff888010227ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888010227af8 R13=ffff888010227ae0 R14=ffff888010227b30 R15=ffff888010227a98 RIP=ffffffff81131c58 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 00007fab5f684900 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=00007fab5eb19f80 CR3=000000000d906000 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=ee688c04748aca6200000000000ae988 XMM05=118a4d2525e840320000000000135828 XMM06=19e9129bd510f23500000000001346e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3d010 RBX=ffffffff85ba4c60 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000003 RDI=ffffffff85ba4c60 RBP=0000000000000000 RSP=ffff88800efc7ba0 R8 =0000000000000000 R9 =ffff88800efc7bf0 R10=0000000000000003 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=0000000000000003 R15=0000000000000246 RIP=ffffffff812a09d9 RFL=00000096 [--S-AP-] 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 00007f42de4eb900 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=00007ffef196b000 CR3=000000000e8f0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000