syzkaller login: [ 30.362115] BUG: Bad rss-counter state mm:000000002035cdfe type:MM_FILEPAGES val:33 [ 30.363594] BUG: Bad rss-counter state mm:000000002035cdfe type:MM_ANONPAGES val:22 [ 30.537449] ================================================================== [ 30.538377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.539571] Read of size 8 at addr ffff8880168f1c20 by task sshd/221 [ 30.540644] [ 30.540917] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.541876] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.542864] Call Trace: [ 30.543199] [ 30.543490] dump_stack_lvl+0x91/0xf0 [ 30.543988] print_report+0xcc/0x620 [ 30.544500] ? __virt_addr_valid+0x102/0x340 [ 30.545060] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.545681] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.546297] kasan_report+0xbe/0xf0 [ 30.546782] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.547434] vma_interval_tree_remove+0xc75/0xec0 [ 30.548081] vma_prepare+0xc54/0x11a0 [ 30.548585] __split_vma+0x5af/0x950 [ 30.549082] ? __pfx___split_vma+0x10/0x10 [ 30.549636] ? find_held_lock+0x2c/0x110 [ 30.550219] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.550826] ? lock_is_held_type+0x9f/0x120 [ 30.551413] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.552063] ? mtree_range_walk+0x632/0x900 [ 30.552661] ? mas_walk+0x5c7/0x7c0 [ 30.553194] do_vmi_munmap+0x1f1/0x2b0 [ 30.553723] mmap_region+0x1f9/0x2660 [ 30.554233] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.554773] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.555575] ? __pfx_lock_acquire+0x10/0x10 [ 30.556139] ? __pfx_mmap_region+0x10/0x10 [ 30.556696] ? security_mmap_addr+0x7d/0xa0 [ 30.557257] ? get_unmapped_area+0x1f5/0x3f0 [ 30.557851] do_mmap+0x854/0xf00 [ 30.558318] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.558836] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.559438] ksys_mmap_pgoff+0x3af/0x500 [ 30.559997] do_syscall_64+0x3f/0x90 [ 30.560515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.561211] RIP: 0033:0x7f7473c32d82 [ 30.561705] 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 [ 30.563988] RSP: 002b:00007ffd35283ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.565028] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7473c32d82 [ 30.566151] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f747306c000 [ 30.567242] RBP: 00007f747306c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.568135] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562307f56ec0 [ 30.569021] R13: 00007ffd35283af0 R14: 00007ffd35283b20 R15: 00007ffd35283e80 [ 30.569922] [ 30.570229] [ 30.570455] Allocated by task 214: [ 30.570903] kasan_save_stack+0x22/0x50 [ 30.571462] kasan_set_track+0x25/0x30 [ 30.572085] __kasan_slab_alloc+0x59/0x70 [ 30.572764] kmem_cache_alloc+0x16b/0x370 [ 30.573434] vm_area_dup+0x20/0x160 [ 30.574031] __split_vma+0x170/0x950 [ 30.574581] split_vma+0xc6/0x110 [ 30.575078] mprotect_fixup+0x8d2/0xb30 [ 30.575615] do_mprotect_pkey+0x87e/0xd40 [ 30.576173] __x64_sys_mprotect+0x78/0xc0 [ 30.576728] do_syscall_64+0x3f/0x90 [ 30.577313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.578170] [ 30.578444] Freed by task 214: [ 30.578959] kasan_save_stack+0x22/0x50 [ 30.579605] kasan_set_track+0x25/0x30 [ 30.580128] kasan_save_free_info+0x2b/0x50 [ 30.580697] __kasan_slab_free+0x10a/0x190 [ 30.581255] kmem_cache_free+0x10d/0x4d0 [ 30.581793] rcu_core+0x8c8/0x2860 [ 30.582271] __do_softirq+0x1b7/0x7d4 [ 30.582787] [ 30.583045] Last potentially related work creation: [ 30.583687] kasan_save_stack+0x22/0x50 [ 30.584227] __kasan_record_aux_stack+0x8e/0xa0 [ 30.584827] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.585505] remove_vma+0x139/0x170 [ 30.585996] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.586588] do_vmi_munmap+0x1f1/0x2b0 [ 30.587123] __vm_munmap+0x138/0x3a0 [ 30.587618] __x64_sys_munmap+0x59/0x80 [ 30.588151] do_syscall_64+0x3f/0x90 [ 30.588665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.589356] [ 30.589583] The buggy address belongs to the object at ffff8880168f1bc8 [ 30.589583] which belongs to the cache vm_area_struct of size 168 [ 30.591438] The buggy address is located 88 bytes inside of [ 30.591438] freed 168-byte region [ffff8880168f1bc8, ffff8880168f1c70) [ 30.593320] [ 30.593599] The buggy address belongs to the physical page: [ 30.594490] page:00000000d7e93eba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168f1 [ 30.595953] memcg:ffff888016809d01 [ 30.596415] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.597120] page_type: 0xffffffff() [ 30.597617] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.598594] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016809d01 [ 30.599606] page dumped because: kasan: bad access detected [ 30.600335] [ 30.600641] Memory state around the buggy address: [ 30.601345] ffff8880168f1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.602273] ffff8880168f1b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.603251] >ffff8880168f1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.604189] ^ [ 30.604771] ffff8880168f1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.605716] ffff8880168f1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.606660] ================================================================== [ 30.607846] Disabling lock debugging due to kernel taint [ 32.583646] BUG: Bad rss-counter state mm:00000000a835e4cd type:MM_FILEPAGES val:33 [ 32.584887] BUG: Bad rss-counter state mm:00000000a835e4cd type:MM_ANONPAGES val:22 [ 33.124092] BUG: Bad rss-counter state mm:0000000046acd4b1 type:MM_FILEPAGES val:33 [ 33.125276] BUG: Bad rss-counter state mm:0000000046acd4b1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1875' (ECDSA) to the list of known hosts. 2023/06/20 15:18:27 fuzzer started 2023/06/20 15:18:27 dialing manager at localhost:36067 2023/06/20 15:18:27 checking machine... 2023/06/20 15:18:27 checking revisions... [ 33.758866] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:18:27 testing simple program... [ 33.803600] cgroup: Unknown subsys name 'net' [ 33.848005] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:18:27 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=ffff888008c04000 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=00007faed25ab350 CR3=00000000182c8000 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=2036323a38313a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a38313a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff86139701 RDX=ffff88806cf09e10 RSI=0000000000000000 RDI=ffff88806cf09aa8 RBP=ffff88806cf09b30 RSP=ffff88806cf09a78 R8 =ffffffff86139748 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806cf09b60 R13=ffff88806cf09ae0 R14=ffff88806cf09e08 R15=ffff88806cf09a98 RIP=ffffffff81130933 RFL=00000296 [--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 00007f11cd952900 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=00007ffd417f9000 CR3=0000000016838000 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=6720646572637465733a4d41503d706f 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