syzkaller login: [ 77.053079] BUG: Bad rss-counter state mm:00000000a2a5073e type:MM_FILEPAGES val:33 [ 77.054159] BUG: Bad rss-counter state mm:00000000a2a5073e type:MM_ANONPAGES val:22 [ 77.189811] ================================================================== [ 77.190909] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 77.192006] Read of size 8 at addr ffff88800dcf0140 by task sshd/221 [ 77.193117] [ 77.193374] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 77.194521] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 77.195600] Call Trace: [ 77.195963] [ 77.196278] dump_stack_lvl+0x91/0xf0 [ 77.196816] print_report+0xcc/0x620 [ 77.197361] ? __virt_addr_valid+0x102/0x340 [ 77.197970] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.198656] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.199366] kasan_report+0xbe/0xf0 [ 77.199914] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.200634] vma_interval_tree_remove+0xc75/0xec0 [ 77.201337] vma_prepare+0xc54/0x11a0 [ 77.201874] __split_vma+0x5af/0x950 [ 77.202342] ? __pfx___split_vma+0x10/0x10 [ 77.202873] ? find_held_lock+0x2c/0x110 [ 77.203401] do_vmi_align_munmap+0x2ba/0x11f0 [ 77.203979] ? lock_is_held_type+0x9f/0x120 [ 77.204513] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 77.205144] ? mtree_range_walk+0x632/0x900 [ 77.205695] ? mas_walk+0x5c7/0x7c0 [ 77.206176] do_vmi_munmap+0x1f1/0x2b0 [ 77.206677] mmap_region+0x1f9/0x2660 [ 77.207160] ? vm_mmap_pgoff+0x15c/0x3a0 [ 77.207674] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 77.208391] ? __pfx_lock_acquire+0x10/0x10 [ 77.208933] ? __pfx_mmap_region+0x10/0x10 [ 77.209467] ? security_mmap_addr+0x7d/0xa0 [ 77.210033] ? get_unmapped_area+0x1f5/0x3f0 [ 77.210613] do_mmap+0x854/0xf00 [ 77.211068] vm_mmap_pgoff+0x1a6/0x3a0 [ 77.211583] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 77.212174] ksys_mmap_pgoff+0x3af/0x500 [ 77.212698] do_syscall_64+0x3f/0x90 [ 77.213192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.213853] RIP: 0033:0x7f7d55c0bd82 [ 77.214355] 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 [ 77.216695] RSP: 002b:00007ffe2f2ad188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 77.217728] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d55c0bd82 [ 77.218661] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d55045000 [ 77.219595] RBP: 00007f7d55045000 R08: 0000000000000009 R09: 0000000000001000 [ 77.220524] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e88060bec0 [ 77.221471] R13: 00007ffe2f2ad1a0 R14: 00007ffe2f2ad1d0 R15: 00007ffe2f2ad530 [ 77.222434] [ 77.222761] [ 77.223006] Allocated by task 214: [ 77.223480] kasan_save_stack+0x22/0x50 [ 77.224039] kasan_set_track+0x25/0x30 [ 77.224597] __kasan_slab_alloc+0x59/0x70 [ 77.225202] kmem_cache_alloc+0x16b/0x370 [ 77.225782] vm_area_dup+0x20/0x160 [ 77.226272] __split_vma+0x170/0x950 [ 77.226779] split_vma+0xc6/0x110 [ 77.227259] mprotect_fixup+0x8d2/0xb30 [ 77.227806] do_mprotect_pkey+0x87e/0xd40 [ 77.228371] __x64_sys_mprotect+0x78/0xc0 [ 77.228952] do_syscall_64+0x3f/0x90 [ 77.229470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.230170] [ 77.230404] Freed by task 13: [ 77.230821] kasan_save_stack+0x22/0x50 [ 77.231369] kasan_set_track+0x25/0x30 [ 77.231906] kasan_save_free_info+0x2b/0x50 [ 77.232479] __kasan_slab_free+0x10a/0x190 [ 77.233062] kmem_cache_free+0x10d/0x4d0 [ 77.233608] rcu_core+0x8c8/0x2860 [ 77.234092] __do_softirq+0x1b7/0x7d4 [ 77.234608] [ 77.234842] Last potentially related work creation: [ 77.235476] kasan_save_stack+0x22/0x50 [ 77.236017] __kasan_record_aux_stack+0x8e/0xa0 [ 77.236636] __call_rcu_common.constprop.0+0x6a/0xb90 [ 77.237347] remove_vma+0x139/0x170 [ 77.237839] do_vmi_align_munmap+0xd4a/0x11f0 [ 77.238444] do_vmi_munmap+0x1f1/0x2b0 [ 77.238967] __vm_munmap+0x138/0x3a0 [ 77.239476] __x64_sys_munmap+0x59/0x80 [ 77.240017] do_syscall_64+0x3f/0x90 [ 77.240529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.241241] [ 77.241473] The buggy address belongs to the object at ffff88800dcf00e8 [ 77.241473] which belongs to the cache vm_area_struct of size 168 [ 77.243030] The buggy address is located 88 bytes inside of [ 77.243030] freed 168-byte region [ffff88800dcf00e8, ffff88800dcf0190) [ 77.244539] [ 77.244772] The buggy address belongs to the physical page: [ 77.245484] page:00000000d68929a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcf0 [ 77.246636] memcg:ffff88800e8f5401 [ 77.247124] flags: 0x100000000000200(slab|node=0|zone=1) [ 77.247818] page_type: 0xffffffff() [ 77.248296] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 77.249296] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8f5401 [ 77.250257] page dumped because: kasan: bad access detected [ 77.250958] [ 77.251188] Memory state around the buggy address: [ 77.251809] ffff88800dcf0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 77.252722] ffff88800dcf0080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 77.253641] >ffff88800dcf0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 77.254550] ^ [ 77.255234] ffff88800dcf0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 77.256157] ffff88800dcf0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 77.257096] ================================================================== [ 77.258498] Disabling lock debugging due to kernel taint [ 78.572634] BUG: Bad rss-counter state mm:000000002f8c2a5d type:MM_FILEPAGES val:33 [ 78.573478] BUG: Bad rss-counter state mm:000000002f8c2a5d type:MM_ANONPAGES val:22 [ 79.115322] BUG: Bad rss-counter state mm:000000000aaa2284 type:MM_FILEPAGES val:33 [ 79.116478] BUG: Bad rss-counter state mm:000000000aaa2284 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42498' (ECDSA) to the list of known hosts. 2023/06/19 19:56:43 fuzzer started 2023/06/19 19:56:44 dialing manager at localhost:44161 2023/06/19 19:56:44 checking machine... 2023/06/19 19:56:44 checking revisions... [ 79.750558] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:56:44 testing simple program... [ 79.790710] cgroup: Unknown subsys name 'net' [ 79.846871] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:55:58 Registers: info registers vcpu 0 RAX=1ffff11003952485 RBX=ffff88801ca923f8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801ca92428 RBP=ffff88801b9fb0e8 RSP=ffff88800eb1f908 R8 =0000000000000001 R9 =ffffed1001d63f15 R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88801b9fab58 R14=ffffffff81c63f2c R15=0000000000000000 RIP=ffffffff8184636c RFL=00000046 [---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 00007fe33e5b0700 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=00007ffc70ddd9b8 CR3=0000000015dc8000 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=2033343a36353a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a36353a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813782a8 RBX=0000000000000002 RCX=0000000000000001 RDX=ffff88806cf09ae0 RSI=ffffffff813782a8 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09b60 R13=ffff88806cf09ae0 R14=ffff888008d751c0 R15=ffff88806cf09a98 RIP=ffffffff81130641 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 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=00007f4916cffc60 CR3=00000000144bc000 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=d1ad0dbfd938eb8d0f4f4a28e012acb4 XMM02=0000000000121728eff9b2d0a8fce9cb XMM03=00000000001217f82c67c8bc2e329bc3 XMM04=c4199233a7484d0400000000000ae988 XMM05=e4cb8bb95a7664b60000000000139220 XMM06=7f0dbbcc295fad4b0000000000138088 XMM07=e042d86d42eb936e0000000000129368 XMM08=7639b9bc62f6c64c00000000001217f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000