syzkaller login: [ 31.400335] BUG: Bad rss-counter state mm:00000000337ce6e9 type:MM_FILEPAGES val:33 [ 31.402137] BUG: Bad rss-counter state mm:00000000337ce6e9 type:MM_ANONPAGES val:22 [ 31.590604] ================================================================== [ 31.591694] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.593023] Read of size 8 at addr ffff888016826968 by task sshd/219 [ 31.594057] [ 31.594382] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.595536] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.596779] Call Trace: [ 31.597134] [ 31.597466] dump_stack_lvl+0x91/0xf0 [ 31.598031] print_report+0xcc/0x620 [ 31.598587] ? __virt_addr_valid+0x102/0x340 [ 31.599205] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.599894] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.600593] kasan_report+0xbe/0xf0 [ 31.601122] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.601831] vma_interval_tree_remove+0xc75/0xec0 [ 31.602519] vma_prepare+0xc54/0x11a0 [ 31.603061] __split_vma+0x5af/0x950 [ 31.603578] ? __pfx___split_vma+0x10/0x10 [ 31.604170] ? find_held_lock+0x2c/0x110 [ 31.604779] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.605402] ? lock_is_held_type+0x9f/0x120 [ 31.606078] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.606827] ? mtree_range_walk+0x632/0x900 [ 31.607440] ? mas_walk+0x5c7/0x7c0 [ 31.607964] do_vmi_munmap+0x1f1/0x2b0 [ 31.608505] mmap_region+0x1f9/0x2660 [ 31.609025] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.609590] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.610396] ? __pfx_lock_acquire+0x10/0x10 [ 31.610988] ? __pfx_mmap_region+0x10/0x10 [ 31.611565] ? security_mmap_addr+0x7d/0xa0 [ 31.612153] ? get_unmapped_area+0x1f5/0x3f0 [ 31.612763] do_mmap+0x854/0xf00 [ 31.613246] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.613796] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.614443] ksys_mmap_pgoff+0x3af/0x500 [ 31.615015] do_syscall_64+0x3f/0x90 [ 31.615525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.616220] RIP: 0033:0x7fdbde2d5d82 [ 31.616715] 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 [ 31.619066] RSP: 002b:00007ffd7bf82278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.620021] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbde2d5d82 [ 31.620924] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbdd70f000 [ 31.621851] RBP: 00007fdbdd70f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.622774] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e9a585ec0 [ 31.623718] R13: 00007ffd7bf82290 R14: 00007ffd7bf822c0 R15: 00007ffd7bf82620 [ 31.624642] [ 31.624959] [ 31.625189] Allocated by task 212: [ 31.625661] kasan_save_stack+0x22/0x50 [ 31.626224] kasan_set_track+0x25/0x30 [ 31.626769] __kasan_slab_alloc+0x59/0x70 [ 31.627334] kmem_cache_alloc+0x16b/0x370 [ 31.627898] vm_area_dup+0x20/0x160 [ 31.628420] __split_vma+0x170/0x950 [ 31.628932] split_vma+0xc6/0x110 [ 31.629421] mprotect_fixup+0x8d2/0xb30 [ 31.629983] do_mprotect_pkey+0x87e/0xd40 [ 31.630577] __x64_sys_mprotect+0x78/0xc0 [ 31.631154] do_syscall_64+0x3f/0x90 [ 31.631666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.632351] [ 31.632578] Freed by task 212: [ 31.632997] kasan_save_stack+0x22/0x50 [ 31.633549] kasan_set_track+0x25/0x30 [ 31.634085] kasan_save_free_info+0x2b/0x50 [ 31.634680] __kasan_slab_free+0x10a/0x190 [ 31.635265] kmem_cache_free+0x10d/0x4d0 [ 31.635808] rcu_core+0x8c8/0x2860 [ 31.636271] __do_softirq+0x1b7/0x7d4 [ 31.636796] [ 31.637029] Last potentially related work creation: [ 31.637722] kasan_save_stack+0x22/0x50 [ 31.638396] __kasan_record_aux_stack+0x8e/0xa0 [ 31.639027] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.639719] remove_vma+0x139/0x170 [ 31.640204] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.640796] do_vmi_munmap+0x1f1/0x2b0 [ 31.641322] __vm_munmap+0x138/0x3a0 [ 31.641829] __x64_sys_munmap+0x59/0x80 [ 31.642372] do_syscall_64+0x3f/0x90 [ 31.642862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.643523] [ 31.643743] Second to last potentially related work creation: [ 31.644445] kasan_save_stack+0x22/0x50 [ 31.644968] __kasan_record_aux_stack+0x8e/0xa0 [ 31.645561] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.646238] remove_vma+0x139/0x170 [ 31.646699] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.647267] do_vmi_munmap+0x1f1/0x2b0 [ 31.647767] mmap_region+0x1f9/0x2660 [ 31.648263] do_mmap+0x854/0xf00 [ 31.648706] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.649205] ksys_mmap_pgoff+0x3af/0x500 [ 31.649721] do_syscall_64+0x3f/0x90 [ 31.650210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.650861] [ 31.651075] The buggy address belongs to the object at ffff888016826910 [ 31.651075] which belongs to the cache vm_area_struct of size 168 [ 31.652590] The buggy address is located 88 bytes inside of [ 31.652590] freed 168-byte region [ffff888016826910, ffff8880168269b8) [ 31.654051] [ 31.654282] The buggy address belongs to the physical page: [ 31.654968] page:0000000043527f4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16826 [ 31.656092] memcg:ffff88800f022d01 [ 31.656532] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.657259] page_type: 0xffffffff() [ 31.657719] raw: 0100000000000200 ffff88800879fc80 ffffea00005ff900 dead000000000005 [ 31.658684] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f022d01 [ 31.659619] page dumped because: kasan: bad access detected [ 31.660305] [ 31.660528] Memory state around the buggy address: [ 31.661131] ffff888016826800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.662022] ffff888016826880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.662929] >ffff888016826900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.663817] ^ [ 31.664640] ffff888016826980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.665522] ffff888016826a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.666390] ================================================================== [ 31.667467] Disabling lock debugging due to kernel taint [ 33.572342] BUG: Bad rss-counter state mm:0000000057dae211 type:MM_FILEPAGES val:33 [ 33.572902] BUG: Bad rss-counter state mm:0000000057dae211 type:MM_ANONPAGES val:22 [ 34.039220] BUG: Bad rss-counter state mm:000000002537daef type:MM_FILEPAGES val:33 [ 34.040388] BUG: Bad rss-counter state mm:000000002537daef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8682' (ECDSA) to the list of known hosts. 2023/06/20 06:24:23 fuzzer started 2023/06/20 06:24:23 dialing manager at localhost:44161 2023/06/20 06:24:23 checking machine... 2023/06/20 06:24:23 checking revisions... [ 34.602620] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:24:23 testing simple program... [ 34.655597] cgroup: Unknown subsys name 'net' [ 34.696037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:24:22 Registers: info registers vcpu 0 RAX=00000016c401d07c RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=0000000000051ed1 RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ea83c R11=00000016c3c993b0 R12=0000000000051ed1 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000013 [----A-C] 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=00007f48b8439650 CR3=0000000018116000 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=2033323a34323a3630203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a34323a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff8880160afa70 RCX=ffffffff8189dc10 RDX=ffff8880146f3680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888017fd7b58 RSP=ffff888017fd7a00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=0000000000000001 R12=0000000000000040 R13=ffff888017fd7b28 R14=ffff888017fd7b58 R15=ffff888017fd7b20 RIP=ffffffff814c01e1 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 00007f48b7e84900 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=00007f1e35335f30 CR3=0000000017ece000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000