syzkaller login: [ 38.917861] BUG: Bad rss-counter state mm:000000001fedd87b type:MM_FILEPAGES val:33 [ 38.918618] BUG: Bad rss-counter state mm:000000001fedd87b type:MM_ANONPAGES val:22 [ 38.950031] ================================================================== [ 38.950676] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.951470] Read of size 8 at addr ffff88800ed70ed8 by task sshd/219 [ 38.951979] [ 38.952129] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.952723] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.953356] Call Trace: [ 38.953579] [ 38.953771] dump_stack_lvl+0x91/0xf0 [ 38.954278] print_report+0xcc/0x620 [ 38.954599] ? __virt_addr_valid+0x102/0x340 [ 38.954958] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.955372] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.955777] kasan_report+0xbe/0xf0 [ 38.956093] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.956547] vma_interval_tree_remove+0xc75/0xec0 [ 38.956944] vma_prepare+0xc54/0x11a0 [ 38.957262] __split_vma+0x5af/0x950 [ 38.957570] ? __pfx___split_vma+0x10/0x10 [ 38.957929] ? find_held_lock+0x2c/0x110 [ 38.958281] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.958658] ? lock_is_held_type+0x9f/0x120 [ 38.959028] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.959433] ? mtree_range_walk+0x632/0x900 [ 38.959804] ? mas_walk+0x5c7/0x7c0 [ 38.960126] do_vmi_munmap+0x1f1/0x2b0 [ 38.960496] mmap_region+0x1f9/0x2660 [ 38.960819] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.961164] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.961639] ? __pfx_lock_acquire+0x10/0x10 [ 38.961998] ? __pfx_mmap_region+0x10/0x10 [ 38.962354] ? security_mmap_addr+0x7d/0xa0 [ 38.962703] ? get_unmapped_area+0x1f5/0x3f0 [ 38.963069] do_mmap+0x854/0xf00 [ 38.963364] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.963694] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.964070] ksys_mmap_pgoff+0x3af/0x500 [ 38.964439] do_syscall_64+0x3f/0x90 [ 38.964753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.965180] RIP: 0033:0x7f7f489ecd82 [ 38.965541] 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 [ 38.966987] RSP: 002b:00007ffe65fa7cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.967604] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f489ecd82 [ 38.968182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f47e26000 [ 38.968787] RBP: 00007f7f47e26000 R08: 0000000000000009 R09: 0000000000001000 [ 38.969357] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a108a83d90 [ 38.969929] R13: 00007ffe65fa7d10 R14: 00007ffe65fa7d40 R15: 00007ffe65fa80a0 [ 38.970548] [ 38.970749] [ 38.970896] Allocated by task 212: [ 38.971186] kasan_save_stack+0x22/0x50 [ 38.971581] kasan_set_track+0x25/0x30 [ 38.971917] __kasan_slab_alloc+0x59/0x70 [ 38.972272] kmem_cache_alloc+0x16b/0x370 [ 38.972650] vm_area_dup+0x20/0x160 [ 38.972963] __split_vma+0x170/0x950 [ 38.973283] split_vma+0xc6/0x110 [ 38.973582] mprotect_fixup+0x8d2/0xb30 [ 38.973921] do_mprotect_pkey+0x87e/0xd40 [ 38.974268] __x64_sys_mprotect+0x78/0xc0 [ 38.974628] do_syscall_64+0x3f/0x90 [ 38.974954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.975389] [ 38.975535] Freed by task 13: [ 38.975798] kasan_save_stack+0x22/0x50 [ 38.976141] kasan_set_track+0x25/0x30 [ 38.976521] kasan_save_free_info+0x2b/0x50 [ 38.976875] __kasan_slab_free+0x10a/0x190 [ 38.977236] kmem_cache_free+0x10d/0x4d0 [ 38.977627] rcu_core+0x8c8/0x2860 [ 38.977928] __do_softirq+0x1b7/0x7d4 [ 38.978255] [ 38.978404] Last potentially related work creation: [ 38.978798] kasan_save_stack+0x22/0x50 [ 38.979139] __kasan_record_aux_stack+0x8e/0xa0 [ 38.979530] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.979966] remove_vma+0x139/0x170 [ 38.980272] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.980691] do_vmi_munmap+0x1f1/0x2b0 [ 38.981021] __vm_munmap+0x138/0x3a0 [ 38.981342] __x64_sys_munmap+0x59/0x80 [ 38.981676] do_syscall_64+0x3f/0x90 [ 38.982003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.982444] [ 38.982595] Second to last potentially related work creation: [ 38.983063] kasan_save_stack+0x22/0x50 [ 38.983407] __kasan_record_aux_stack+0x8e/0xa0 [ 38.983793] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.984228] remove_vma+0x139/0x170 [ 38.984561] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.984943] do_vmi_munmap+0x1f1/0x2b0 [ 38.985281] mmap_region+0x1f9/0x2660 [ 38.985607] do_mmap+0x854/0xf00 [ 38.985901] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.986235] ksys_mmap_pgoff+0x3af/0x500 [ 38.986573] do_syscall_64+0x3f/0x90 [ 38.986900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.987337] [ 38.987489] The buggy address belongs to the object at ffff88800ed70e80 [ 38.987489] which belongs to the cache vm_area_struct of size 168 [ 38.988497] The buggy address is located 88 bytes inside of [ 38.988497] freed 168-byte region [ffff88800ed70e80, ffff88800ed70f28) [ 38.989441] [ 38.989591] The buggy address belongs to the physical page: [ 38.990031] page:0000000030dcd650 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed70 [ 38.990770] memcg:ffff88800e817001 [ 38.991063] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.991531] page_type: 0xffffffff() [ 38.991837] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.992499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e817001 [ 38.993098] page dumped because: kasan: bad access detected [ 38.993543] [ 38.993692] Memory state around the buggy address: [ 38.994085] ffff88800ed70d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.994662] ffff88800ed70e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.995237] >ffff88800ed70e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.995919] ^ [ 38.996459] ffff88800ed70f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.997043] ffff88800ed70f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.997617] ================================================================== [ 38.998277] Disabling lock debugging due to kernel taint [ 40.606223] BUG: Bad rss-counter state mm:00000000563d6123 type:MM_FILEPAGES val:33 [ 40.606963] BUG: Bad rss-counter state mm:00000000563d6123 type:MM_ANONPAGES val:22 [ 41.054288] BUG: Bad rss-counter state mm:00000000ec89ff72 type:MM_FILEPAGES val:33 [ 41.054979] BUG: Bad rss-counter state mm:00000000ec89ff72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29442' (ECDSA) to the list of known hosts. 2023/06/21 09:11:48 fuzzer started 2023/06/21 09:11:48 dialing manager at localhost:36067 2023/06/21 09:11:48 checking machine... 2023/06/21 09:11:48 checking revisions... [ 41.576834] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:11:48 testing simple program... [ 41.621447] cgroup: Unknown subsys name 'net' [ 41.666552] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:11:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffffffff0a85795 RSI=0000000000000001 RDI=ffffffff8542bca8 RBP=ffffffff8542a6c0 RSP=ffffffff85407c80 R8 =ffff888008d915e4 R9 =ffffed10011b2000 R10=ffff888008d90007 R11=ffff888008c04000 R12=ffff888008d90000 R13=0000000000000000 R14=ffff888008d915c0 R15=ffff888008d915e6 RIP=ffffffff8107f524 RFL=00000046 [---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 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=00007f0b87aaa430 CR3=000000000c4fa000 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=f964f74f1c819fb0254dbb0c775557d2 XMM02=ec2efd57dc4c00df000000000011b410 XMM03=588fab2739cad18c000000000011b4e0 XMM04=ae74bbf1d48a190700000000000ae988 XMM05=ff4606f1b38787bf0000000000133910 XMM06=4fda316b135da52b0000000000132c38 XMM07=e042d86d42eb936e0000000000122118 XMM08=588fab2739cad18c000000000011b4e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000031 RCX=0000000000000000 RDX=ffff88800fc33680 RSI=ffffffff81f379d4 RDI=ffff88800a6b00d0 RBP=0000000000000000 RSP=ffff888016b9fa68 R8 =0000000000000005 R9 =000000000000001b R10=0000000000000001 R11=0000000000000000 R12=ffff88800a6b0000 R13=0000000000000001 R14=0000000000000062 R15=dffffc0000000000 RIP=ffffffff81f379ee RFL=00000256 [---ZAP-] 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 00007fc5fcf7c900 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=00007ffd7cf5d000 CR3=000000000c9e8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000