syzkaller login: [ 61.064482] BUG: Bad rss-counter state mm:0000000048837161 type:MM_FILEPAGES val:33 [ 61.066155] BUG: Bad rss-counter state mm:0000000048837161 type:MM_ANONPAGES val:22 [ 61.219310] ================================================================== [ 61.220308] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.221187] Read of size 8 at addr ffff88800c999310 by task sshd/221 [ 61.222057] [ 61.222351] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.223268] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.224234] Call Trace: [ 61.224557] [ 61.224841] dump_stack_lvl+0x91/0xf0 [ 61.225324] print_report+0xcc/0x620 [ 61.225791] ? __virt_addr_valid+0x102/0x340 [ 61.226338] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.226930] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.227507] kasan_report+0xbe/0xf0 [ 61.227966] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.228558] vma_interval_tree_remove+0xc75/0xec0 [ 61.229131] vma_prepare+0xc54/0x11a0 [ 61.229587] __split_vma+0x5af/0x950 [ 61.230039] ? __pfx___split_vma+0x10/0x10 [ 61.230583] ? find_held_lock+0x2c/0x110 [ 61.231114] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.231689] ? lock_is_held_type+0x9f/0x120 [ 61.232235] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.232840] ? mtree_range_walk+0x632/0x900 [ 61.233390] ? mas_walk+0x5c7/0x7c0 [ 61.233875] do_vmi_munmap+0x1f1/0x2b0 [ 61.234385] mmap_region+0x1f9/0x2660 [ 61.234867] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.235386] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.236109] ? __pfx_lock_acquire+0x10/0x10 [ 61.236655] ? __pfx_mmap_region+0x10/0x10 [ 61.237191] ? security_mmap_addr+0x7d/0xa0 [ 61.237727] ? get_unmapped_area+0x1f5/0x3f0 [ 61.238279] do_mmap+0x854/0xf00 [ 61.238751] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.239245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.239819] ksys_mmap_pgoff+0x3af/0x500 [ 61.240333] do_syscall_64+0x3f/0x90 [ 61.240816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.241467] RIP: 0033:0x7f455f64bd82 [ 61.241931] 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 [ 61.244115] RSP: 002b:00007ffeb46d56d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.245021] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f455f64bd82 [ 61.245890] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f455ea85000 [ 61.246778] RBP: 00007f455ea85000 R08: 0000000000000009 R09: 0000000000001000 [ 61.247633] R10: 0000000000000812 R11: 0000000000000206 R12: 000056176a74dec0 [ 61.248496] R13: 00007ffeb46d56f0 R14: 00007ffeb46d5720 R15: 00007ffeb46d5a80 [ 61.249356] [ 61.249650] [ 61.249866] Allocated by task 214: [ 61.250294] kasan_save_stack+0x22/0x50 [ 61.250838] kasan_set_track+0x25/0x30 [ 61.251329] __kasan_slab_alloc+0x59/0x70 [ 61.251871] kmem_cache_alloc+0x16b/0x370 [ 61.252395] vm_area_dup+0x20/0x160 [ 61.252854] __split_vma+0x170/0x950 [ 61.253323] split_vma+0xc6/0x110 [ 61.253758] mprotect_fixup+0x8d2/0xb30 [ 61.254260] do_mprotect_pkey+0x87e/0xd40 [ 61.254790] __x64_sys_mprotect+0x78/0xc0 [ 61.255324] do_syscall_64+0x3f/0x90 [ 61.255804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.256444] [ 61.256666] Freed by task 214: [ 61.257066] kasan_save_stack+0x22/0x50 [ 61.257568] kasan_set_track+0x25/0x30 [ 61.258058] kasan_save_free_info+0x2b/0x50 [ 61.258617] __kasan_slab_free+0x10a/0x190 [ 61.259158] kmem_cache_free+0x10d/0x4d0 [ 61.259664] rcu_core+0x8c8/0x2860 [ 61.260108] __do_softirq+0x1b7/0x7d4 [ 61.260594] [ 61.260818] Last potentially related work creation: [ 61.261420] kasan_save_stack+0x22/0x50 [ 61.261921] __kasan_record_aux_stack+0x8e/0xa0 [ 61.262489] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.263271] remove_vma+0x139/0x170 [ 61.263790] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.264413] do_vmi_munmap+0x1f1/0x2b0 [ 61.264972] __vm_munmap+0x138/0x3a0 [ 61.265507] __x64_sys_munmap+0x59/0x80 [ 61.266071] do_syscall_64+0x3f/0x90 [ 61.266604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.267316] [ 61.267561] Second to last potentially related work creation: [ 61.268319] kasan_save_stack+0x22/0x50 [ 61.268885] __kasan_record_aux_stack+0x8e/0xa0 [ 61.269546] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.270260] remove_vma+0x139/0x170 [ 61.270774] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.271382] do_vmi_munmap+0x1f1/0x2b0 [ 61.271936] mmap_region+0x1f9/0x2660 [ 61.272477] do_mmap+0x854/0xf00 [ 61.272964] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.273533] ksys_mmap_pgoff+0x3af/0x500 [ 61.274093] do_syscall_64+0x3f/0x90 [ 61.274635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.275357] [ 61.275594] The buggy address belongs to the object at ffff88800c9992b8 [ 61.275594] which belongs to the cache vm_area_struct of size 168 [ 61.277299] The buggy address is located 88 bytes inside of [ 61.277299] freed 168-byte region [ffff88800c9992b8, ffff88800c999360) [ 61.278905] [ 61.279158] The buggy address belongs to the physical page: [ 61.279929] page:00000000fd99191f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc999 [ 61.281181] memcg:ffff888009668101 [ 61.281665] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.282391] page_type: 0xffffffff() [ 61.282926] raw: 0100000000000200 ffff8880087a0c80 ffffea00003e6f40 dead000000000004 [ 61.283986] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009668101 [ 61.285037] page dumped because: kasan: bad access detected [ 61.285794] [ 61.286038] Memory state around the buggy address: [ 61.286685] ffff88800c999200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 61.287648] ffff88800c999280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 61.288551] >ffff88800c999300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 61.289463] ^ [ 61.289960] ffff88800c999380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.290898] ffff88800c999400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 61.291791] ================================================================== [ 61.292734] Disabling lock debugging due to kernel taint [ 63.285419] BUG: Bad rss-counter state mm:0000000067d32b58 type:MM_FILEPAGES val:33 [ 63.286450] BUG: Bad rss-counter state mm:0000000067d32b58 type:MM_ANONPAGES val:22 [ 63.726675] BUG: Bad rss-counter state mm:00000000ac42b1ac type:MM_FILEPAGES val:33 [ 63.727661] BUG: Bad rss-counter state mm:00000000ac42b1ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50381' (ECDSA) to the list of known hosts. 2023/06/21 02:32:45 fuzzer started 2023/06/21 02:32:46 dialing manager at localhost:36067 2023/06/21 02:32:46 checking machine... 2023/06/21 02:32:46 checking revisions... [ 64.399295] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:32:46 testing simple program... [ 64.438498] cgroup: Unknown subsys name 'net' [ 64.474454] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:32:45 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11001dfff23 RSP=ffff88800efff8f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff856c1fc0 R13=ffffffff81807f1f R14=0000000000000001 R15=ffffffff8184725c RIP=ffffffff8135b935 RFL=00000247 [---Z-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f21e4506900 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=00007ffeaa419000 CR3=000000000ea3a000 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=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 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=ffff888008c04400 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=00007f97fa1b8d80 CR3=0000000008c68000 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=5952e70b33853189a040ead81bbaf7ed XMM02=000000000011a818eff9b2d0a8fce9cb XMM03=000000000011a8e82c67c8bc2e329bc3 XMM04=8b8289997f8b100b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133380 XMM06=c67c2884a29f823400000000001321e8 XMM07=e042d86d42eb936e0000000000122450 XMM08=5c933919276125ed000000000011a8e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000