syzkaller login: [ 31.008141] BUG: Bad rss-counter state mm:00000000e02c630a type:MM_FILEPAGES val:33 [ 31.009535] BUG: Bad rss-counter state mm:00000000e02c630a type:MM_ANONPAGES val:22 [ 31.163400] ================================================================== [ 31.164799] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.166033] Read of size 8 at addr ffff888015c99228 by task sshd/218 [ 31.167083] [ 31.167374] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.168538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.169870] Call Trace: [ 31.170301] [ 31.170685] dump_stack_lvl+0x91/0xf0 [ 31.171340] print_report+0xcc/0x620 [ 31.172000] ? __virt_addr_valid+0x102/0x340 [ 31.172769] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.173594] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.174423] kasan_report+0xbe/0xf0 [ 31.175061] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.175898] vma_interval_tree_remove+0xc75/0xec0 [ 31.176727] vma_prepare+0xc54/0x11a0 [ 31.177375] __split_vma+0x5af/0x950 [ 31.178009] ? __pfx___split_vma+0x10/0x10 [ 31.178716] ? find_held_lock+0x2c/0x110 [ 31.179417] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.180179] ? lock_is_held_type+0x9f/0x120 [ 31.180849] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.181453] ? mtree_range_walk+0x632/0x900 [ 31.182003] ? mas_walk+0x5c7/0x7c0 [ 31.182488] do_vmi_munmap+0x1f1/0x2b0 [ 31.182983] mmap_region+0x1f9/0x2660 [ 31.183469] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.183982] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.184710] ? __pfx_lock_acquire+0x10/0x10 [ 31.185253] ? __pfx_mmap_region+0x10/0x10 [ 31.185784] ? security_mmap_addr+0x7d/0xa0 [ 31.186317] ? get_unmapped_area+0x1f5/0x3f0 [ 31.186890] do_mmap+0x854/0xf00 [ 31.187340] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.187831] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.188393] ksys_mmap_pgoff+0x3af/0x500 [ 31.188920] do_syscall_64+0x3f/0x90 [ 31.189410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.190066] RIP: 0033:0x7efd4e9eed82 [ 31.190529] 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 [ 31.192701] RSP: 002b:00007ffd48152b08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.193607] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd4e9eed82 [ 31.194469] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd4de28000 [ 31.195311] RBP: 00007efd4de28000 R08: 0000000000000009 R09: 0000000000001000 [ 31.196161] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac1eb97ec0 [ 31.197025] R13: 00007ffd48152b20 R14: 00007ffd48152b50 R15: 00007ffd48152eb0 [ 31.197878] [ 31.198167] [ 31.198382] Allocated by task 211: [ 31.198808] kasan_save_stack+0x22/0x50 [ 31.199312] kasan_set_track+0x25/0x30 [ 31.199802] __kasan_slab_alloc+0x59/0x70 [ 31.200324] kmem_cache_alloc+0x16b/0x370 [ 31.200853] vm_area_dup+0x20/0x160 [ 31.201306] __split_vma+0x170/0x950 [ 31.201814] split_vma+0xc6/0x110 [ 31.202264] mprotect_fixup+0x8d2/0xb30 [ 31.202777] do_mprotect_pkey+0x87e/0xd40 [ 31.203297] __x64_sys_mprotect+0x78/0xc0 [ 31.203839] do_syscall_64+0x3f/0x90 [ 31.204324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.204987] [ 31.205201] Freed by task 211: [ 31.205669] kasan_save_stack+0x22/0x50 [ 31.206179] kasan_set_track+0x25/0x30 [ 31.206676] kasan_save_free_info+0x2b/0x50 [ 31.207217] __kasan_slab_free+0x10a/0x190 [ 31.207751] kmem_cache_free+0x10d/0x4d0 [ 31.208263] rcu_core+0x8c8/0x2860 [ 31.208726] __do_softirq+0x1b7/0x7d4 [ 31.209212] [ 31.209433] Last potentially related work creation: [ 31.210023] kasan_save_stack+0x22/0x50 [ 31.210542] __kasan_record_aux_stack+0x8e/0xa0 [ 31.211122] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.211772] remove_vma+0x139/0x170 [ 31.212229] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.212805] do_vmi_munmap+0x1f1/0x2b0 [ 31.213290] __vm_munmap+0x138/0x3a0 [ 31.213757] __x64_sys_munmap+0x59/0x80 [ 31.214257] do_syscall_64+0x3f/0x90 [ 31.214745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.215392] [ 31.215605] The buggy address belongs to the object at ffff888015c991d0 [ 31.215605] which belongs to the cache vm_area_struct of size 168 [ 31.217085] The buggy address is located 88 bytes inside of [ 31.217085] freed 168-byte region [ffff888015c991d0, ffff888015c99278) [ 31.218488] [ 31.218709] The buggy address belongs to the physical page: [ 31.219371] page:0000000080aa08c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c99 [ 31.220457] memcg:ffff888015c9a001 [ 31.220891] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.221530] page_type: 0xffffffff() [ 31.221984] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.222911] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c9a001 [ 31.223822] page dumped because: kasan: bad access detected [ 31.224488] [ 31.224725] Memory state around the buggy address: [ 31.225306] ffff888015c99100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.226178] ffff888015c99180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.227035] >ffff888015c99200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.227903] ^ [ 31.228464] ffff888015c99280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.229336] ffff888015c99300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.230182] ================================================================== [ 31.231099] Disabling lock debugging due to kernel taint [ 33.659977] BUG: Bad rss-counter state mm:000000009a6ab076 type:MM_FILEPAGES val:33 [ 33.660984] BUG: Bad rss-counter state mm:000000009a6ab076 type:MM_ANONPAGES val:22 [ 34.135278] BUG: Bad rss-counter state mm:0000000033d32ac1 type:MM_FILEPAGES val:33 [ 34.136279] BUG: Bad rss-counter state mm:0000000033d32ac1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15900' (ECDSA) to the list of known hosts. 2023/06/20 15:07:59 fuzzer started 2023/06/20 15:07:59 dialing manager at localhost:36067 2023/06/20 15:07:59 checking machine... 2023/06/20 15:07:59 checking revisions... [ 34.852538] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:07:59 testing simple program... [ 34.899563] cgroup: Unknown subsys name 'net' [ 34.941876] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:07:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86607dd4 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff813a0ac4 RDI=ffffffff86607dd4 RBP=ffffffff86607dd4 RSP=ffff88806ce09a20 R8 =0000000000000007 R9 =ffffffffff600000 R10=ffffffff86607000 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800d63a540 RIP=ffffffff814c0891 RFL=00000206 [-----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 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=00007f4c5e7b6740 CR3=000000000f0a0000 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=2038353a37303a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a37303a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f15efd0 RCX=0000000000000001 RDX=1ffff11001e2bdfb RSI=ffff88800f15ff58 RDI=ffff88800f15efd8 RBP=ffff88800f15ff58 RSP=ffff88800f15ef28 R8 =ffffffff864bbb58 R9 =ffff88800f15f010 R10=0000000000038001 R11=00000000000b6a61 R12=00000000000000a8 R13=ffff88800f15f018 R14=ffff88800f15ff58 R15=ffff88800f15efd0 RIP=ffffffff81130445 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 00007fd48f171900 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=00007fd48f11b008 CR3=000000000c9ba000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000