syzkaller login: [ 68.996698] BUG: Bad rss-counter state mm:000000001fa831d8 type:MM_FILEPAGES val:33 [ 68.997807] BUG: Bad rss-counter state mm:000000001fa831d8 type:MM_ANONPAGES val:22 [ 69.170743] ================================================================== [ 69.171748] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.172739] Read of size 8 at addr ffff888019f044e0 by task sshd/228 [ 69.173548] [ 69.173882] CPU: 0 PID: 228 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 69.174964] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.176025] Call Trace: [ 69.176361] [ 69.176662] dump_stack_lvl+0x91/0xf0 [ 69.177177] print_report+0xcc/0x620 [ 69.177688] ? __virt_addr_valid+0x102/0x340 [ 69.178274] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.178925] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.179593] kasan_report+0xbe/0xf0 [ 69.180101] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.180774] vma_interval_tree_remove+0xc75/0xec0 [ 69.181415] vma_prepare+0xc54/0x11a0 [ 69.181929] __split_vma+0x5af/0x950 [ 69.182441] ? __pfx___split_vma+0x10/0x10 [ 69.183011] ? find_held_lock+0x2c/0x110 [ 69.183588] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.184189] ? lock_is_held_type+0x9f/0x120 [ 69.184767] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.185422] ? mtree_range_walk+0x632/0x900 [ 69.186012] ? mas_walk+0x5c7/0x7c0 [ 69.186523] do_vmi_munmap+0x1f1/0x2b0 [ 69.187051] mmap_region+0x1f9/0x2660 [ 69.187575] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.188126] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.188891] ? __pfx_lock_acquire+0x10/0x10 [ 69.189474] ? __pfx_mmap_region+0x10/0x10 [ 69.190050] ? security_mmap_addr+0x7d/0xa0 [ 69.190627] ? get_unmapped_area+0x1f5/0x3f0 [ 69.191216] do_mmap+0x854/0xf00 [ 69.191718] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.192251] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.192852] ksys_mmap_pgoff+0x3af/0x500 [ 69.193403] do_syscall_64+0x3f/0x90 [ 69.193921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.194624] RIP: 0033:0x7f4c9b366d82 [ 69.195113] 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 [ 69.197409] RSP: 002b:00007fff9c6f3c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.198485] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4c9b366d82 [ 69.199378] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4c9a7a0000 [ 69.200263] RBP: 00007f4c9a7a0000 R08: 0000000000000009 R09: 0000000000001000 [ 69.201149] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6585dcec0 [ 69.202029] R13: 00007fff9c6f3cb0 R14: 00007fff9c6f3ce0 R15: 00007fff9c6f4040 [ 69.202923] [ 69.203227] [ 69.203468] Allocated by task 221: [ 69.203921] kasan_save_stack+0x22/0x50 [ 69.204457] kasan_set_track+0x25/0x30 [ 69.204974] __kasan_slab_alloc+0x59/0x70 [ 69.205527] kmem_cache_alloc+0x16b/0x370 [ 69.206068] vm_area_dup+0x20/0x160 [ 69.206541] __split_vma+0x170/0x950 [ 69.207035] split_vma+0xc6/0x110 [ 69.207503] mprotect_fixup+0x8d2/0xb30 [ 69.208029] do_mprotect_pkey+0x87e/0xd40 [ 69.208574] __x64_sys_mprotect+0x78/0xc0 [ 69.209123] do_syscall_64+0x3f/0x90 [ 69.209620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.210292] [ 69.210521] Freed by task 221: [ 69.210933] kasan_save_stack+0x22/0x50 [ 69.211469] kasan_set_track+0x25/0x30 [ 69.211987] kasan_save_free_info+0x2b/0x50 [ 69.212545] __kasan_slab_free+0x10a/0x190 [ 69.213111] kmem_cache_free+0x10d/0x4d0 [ 69.213645] rcu_core+0x8c8/0x2860 [ 69.214110] __do_softirq+0x1b7/0x7d4 [ 69.214605] [ 69.214831] Last potentially related work creation: [ 69.215457] kasan_save_stack+0x22/0x50 [ 69.215986] __kasan_record_aux_stack+0x8e/0xa0 [ 69.216581] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.217251] remove_vma+0x139/0x170 [ 69.217725] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.218311] do_vmi_munmap+0x1f1/0x2b0 [ 69.218822] __vm_munmap+0x138/0x3a0 [ 69.219317] __x64_sys_munmap+0x59/0x80 [ 69.219838] do_syscall_64+0x3f/0x90 [ 69.220334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.221004] [ 69.221232] The buggy address belongs to the object at ffff888019f04488 [ 69.221232] which belongs to the cache vm_area_struct of size 168 [ 69.222767] The buggy address is located 88 bytes inside of [ 69.222767] freed 168-byte region [ffff888019f04488, ffff888019f04530) [ 69.224249] [ 69.224476] The buggy address belongs to the physical page: [ 69.225169] page:000000003d72508c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f04 [ 69.226310] memcg:ffff888014197f01 [ 69.226761] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.227449] page_type: 0xffffffff() [ 69.227922] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 69.228880] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014197f01 [ 69.229836] page dumped because: kasan: bad access detected [ 69.230531] [ 69.230757] Memory state around the buggy address: [ 69.231375] ffff888019f04380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.232263] ffff888019f04400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 69.233152] >ffff888019f04480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.234038] ^ [ 69.234825] ffff888019f04500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 69.235734] ffff888019f04580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.236621] ================================================================== [ 69.237671] Disabling lock debugging due to kernel taint [ 71.166503] BUG: Bad rss-counter state mm:000000002f5bfff0 type:MM_FILEPAGES val:33 [ 71.167567] BUG: Bad rss-counter state mm:000000002f5bfff0 type:MM_ANONPAGES val:22 [ 71.734672] BUG: Bad rss-counter state mm:000000008d654e4e type:MM_FILEPAGES val:33 [ 71.735844] BUG: Bad rss-counter state mm:000000008d654e4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53277' (ECDSA) to the list of known hosts. 2023/06/20 05:30:41 fuzzer started 2023/06/20 05:30:41 dialing manager at localhost:44161 2023/06/20 05:30:41 checking machine... 2023/06/20 05:30:41 checking revisions... [ 72.407396] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:30:42 testing simple program... [ 72.465638] cgroup: Unknown subsys name 'net' [ 72.497745] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:30:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f6ccc31c610 CR3=000000000dc24000 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=2031343a30333a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a30333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf2b9c0 RCX=0000000000000100 RDX=ffff88800fd18000 RSI=ffffffff813bdf66 RDI=0000000000000001 RBP=ffff88806cf2c250 RSP=ffff88806cf09750 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=0000000000000001 R13=0000000000000000 R14=ffff88806cf2b9c0 R15=dffffc0000000000 RIP=ffffffff814c0811 RFL=00000006 [-----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 00007f34d228b900 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=00007f34d2255008 CR3=0000000019ec2000 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