syzkaller login: [ 70.540318] BUG: Bad rss-counter state mm:00000000e91549f6 type:MM_FILEPAGES val:33 [ 70.541600] BUG: Bad rss-counter state mm:00000000e91549f6 type:MM_ANONPAGES val:22 [ 70.693699] ================================================================== [ 70.694743] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.695715] Read of size 8 at addr ffff888019c654e0 by task sshd/218 [ 70.696615] [ 70.696848] CPU: 0 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 70.697960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.698997] Call Trace: [ 70.699343] [ 70.699644] dump_stack_lvl+0x91/0xf0 [ 70.700154] print_report+0xcc/0x620 [ 70.700655] ? __virt_addr_valid+0x102/0x340 [ 70.701252] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.701914] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.702553] kasan_report+0xbe/0xf0 [ 70.703065] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.703721] vma_interval_tree_remove+0xc75/0xec0 [ 70.704361] vma_prepare+0xc54/0x11a0 [ 70.704868] __split_vma+0x5af/0x950 [ 70.705363] ? __pfx___split_vma+0x10/0x10 [ 70.705902] ? find_held_lock+0x2c/0x110 [ 70.706421] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.706990] ? lock_is_held_type+0x9f/0x120 [ 70.707523] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.708158] ? mtree_range_walk+0x632/0x900 [ 70.708715] ? mas_walk+0x5c7/0x7c0 [ 70.709205] do_vmi_munmap+0x1f1/0x2b0 [ 70.709698] mmap_region+0x1f9/0x2660 [ 70.710185] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.710693] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.711407] ? __pfx_lock_acquire+0x10/0x10 [ 70.711948] ? __pfx_mmap_region+0x10/0x10 [ 70.712495] ? security_mmap_addr+0x7d/0xa0 [ 70.713030] ? get_unmapped_area+0x1f5/0x3f0 [ 70.713591] do_mmap+0x854/0xf00 [ 70.714029] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.714530] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.715089] ksys_mmap_pgoff+0x3af/0x500 [ 70.715600] do_syscall_64+0x3f/0x90 [ 70.716074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.716719] RIP: 0033:0x7fa175896d82 [ 70.717197] 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 [ 70.719386] RSP: 002b:00007ffc09ec7a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.720302] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa175896d82 [ 70.721150] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa174cd0000 [ 70.722022] RBP: 00007fa174cd0000 R08: 0000000000000009 R09: 0000000000001000 [ 70.722887] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8f3734b20 [ 70.723738] R13: 00007ffc09ec7a60 R14: 00007ffc09ec7a90 R15: 00007ffc09ec7df0 [ 70.724610] [ 70.724907] [ 70.725126] Allocated by task 211: [ 70.725571] kasan_save_stack+0x22/0x50 [ 70.726088] kasan_set_track+0x25/0x30 [ 70.726593] __kasan_slab_alloc+0x59/0x70 [ 70.727118] kmem_cache_alloc+0x16b/0x370 [ 70.727636] vm_area_dup+0x20/0x160 [ 70.728097] __split_vma+0x170/0x950 [ 70.728565] split_vma+0xc6/0x110 [ 70.729007] mprotect_fixup+0x8d2/0xb30 [ 70.729526] do_mprotect_pkey+0x87e/0xd40 [ 70.730046] __x64_sys_mprotect+0x78/0xc0 [ 70.730562] do_syscall_64+0x3f/0x90 [ 70.731037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.731683] [ 70.731897] Freed by task 211: [ 70.732288] kasan_save_stack+0x22/0x50 [ 70.732794] kasan_set_track+0x25/0x30 [ 70.733293] kasan_save_free_info+0x2b/0x50 [ 70.733829] __kasan_slab_free+0x10a/0x190 [ 70.734372] kmem_cache_free+0x10d/0x4d0 [ 70.734876] rcu_core+0x8c8/0x2860 [ 70.735317] __do_softirq+0x1b7/0x7d4 [ 70.735789] [ 70.736007] Last potentially related work creation: [ 70.736585] kasan_save_stack+0x22/0x50 [ 70.737089] __kasan_record_aux_stack+0x8e/0xa0 [ 70.737689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.738326] remove_vma+0x139/0x170 [ 70.738776] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.739333] do_vmi_munmap+0x1f1/0x2b0 [ 70.739814] __vm_munmap+0x138/0x3a0 [ 70.740278] __x64_sys_munmap+0x59/0x80 [ 70.740771] do_syscall_64+0x3f/0x90 [ 70.741269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.741909] [ 70.742126] Second to last potentially related work creation: [ 70.742807] kasan_save_stack+0x22/0x50 [ 70.743322] __kasan_record_aux_stack+0x8e/0xa0 [ 70.743890] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.744527] remove_vma+0x139/0x170 [ 70.744979] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.745558] do_vmi_munmap+0x1f1/0x2b0 [ 70.746042] mmap_region+0x1f9/0x2660 [ 70.746521] do_mmap+0x854/0xf00 [ 70.746953] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.747445] ksys_mmap_pgoff+0x3af/0x500 [ 70.747943] do_syscall_64+0x3f/0x90 [ 70.748413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.749057] [ 70.749289] The buggy address belongs to the object at ffff888019c65488 [ 70.749289] which belongs to the cache vm_area_struct of size 168 [ 70.750769] The buggy address is located 88 bytes inside of [ 70.750769] freed 168-byte region [ffff888019c65488, ffff888019c65530) [ 70.752175] [ 70.752389] The buggy address belongs to the physical page: [ 70.753052] page:000000001d61861d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c65 [ 70.754158] memcg:ffff888019f91201 [ 70.754583] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.755235] page_type: 0xffffffff() [ 70.755685] raw: 0100000000000200 ffff88800879fc80 ffffea00003787c0 dead000000000006 [ 70.756607] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f91201 [ 70.757533] page dumped because: kasan: bad access detected [ 70.758220] [ 70.758435] Memory state around the buggy address: [ 70.759024] ffff888019c65380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 70.759882] ffff888019c65400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 70.760741] >ffff888019c65480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.761605] ^ [ 70.762357] ffff888019c65500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 70.763216] ffff888019c65580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 70.764066] ================================================================== [ 70.765066] Disabling lock debugging due to kernel taint [ 72.736306] BUG: Bad rss-counter state mm:00000000c4a9048e type:MM_FILEPAGES val:33 [ 72.737488] BUG: Bad rss-counter state mm:00000000c4a9048e type:MM_ANONPAGES val:22 [ 73.137138] BUG: Bad rss-counter state mm:0000000052a6d6ad type:MM_FILEPAGES val:33 [ 73.138373] BUG: Bad rss-counter state mm:0000000052a6d6ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45528' (ECDSA) to the list of known hosts. 2023/06/19 18:51:52 fuzzer started 2023/06/19 18:51:52 dialing manager at localhost:44161 2023/06/19 18:51:52 checking machine... 2023/06/19 18:51:52 checking revisions... [ 73.869515] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:51:52 testing simple program... [ 73.918006] cgroup: Unknown subsys name 'net' [ 73.973975] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:51:12 Registers: info registers vcpu 0 RAX=0000000000400100 RBX=00000000000128c0 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000000128c0 RDI=ffff888008fce000 RBP=ffff8880165af760 RSP=ffff8880165af700 R8 =0000000000000005 R9 =0000000000000004 R10=0000000000000000 R11=00000000000b6996 R12=ffff888008fce000 R13=00000000ffffffff R14=00000000000128c0 R15=ffffffff8366cd3c RIP=ffffffff81810ad0 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 00007f0d5dccc900 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=00007fff10fd5000 CR3=0000000016794000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fe212027000 CR3=0000000015834000 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=2031353a31353a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a31353a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000