syzkaller login: [ 42.353785] BUG: Bad rss-counter state mm:00000000bd668a9c type:MM_FILEPAGES val:33 [ 42.354976] BUG: Bad rss-counter state mm:00000000bd668a9c type:MM_ANONPAGES val:22 [ 42.511897] ================================================================== [ 42.512569] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.513207] Read of size 8 at addr ffff88800e05bb38 by task sshd/218 [ 42.513772] [ 42.513932] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.514559] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.515534] Call Trace: [ 42.515770] [ 42.515979] dump_stack_lvl+0x91/0xf0 [ 42.516343] print_report+0xcc/0x620 [ 42.516708] ? __virt_addr_valid+0x102/0x340 [ 42.517101] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.517578] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.518018] kasan_report+0xbe/0xf0 [ 42.518360] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.518803] vma_interval_tree_remove+0xc75/0xec0 [ 42.519242] vma_prepare+0xc54/0x11a0 [ 42.519598] __split_vma+0x5af/0x950 [ 42.519944] ? __pfx___split_vma+0x10/0x10 [ 42.520336] ? find_held_lock+0x2c/0x110 [ 42.520740] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.521151] ? lock_is_held_type+0x9f/0x120 [ 42.521554] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.521996] ? mtree_range_walk+0x632/0x900 [ 42.522383] ? mas_walk+0x5c7/0x7c0 [ 42.522726] do_vmi_munmap+0x1f1/0x2b0 [ 42.523070] mmap_region+0x1f9/0x2660 [ 42.523404] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.523763] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.524268] ? __pfx_lock_acquire+0x10/0x10 [ 42.524650] ? __pfx_mmap_region+0x10/0x10 [ 42.525028] ? security_mmap_addr+0x7d/0xa0 [ 42.525410] ? get_unmapped_area+0x1f5/0x3f0 [ 42.525794] do_mmap+0x854/0xf00 [ 42.526108] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.526469] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.526861] ksys_mmap_pgoff+0x3af/0x500 [ 42.527219] do_syscall_64+0x3f/0x90 [ 42.527546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.527997] RIP: 0033:0x7f1652a5cd82 [ 42.528311] 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 [ 42.529879] RSP: 002b:00007ffe84aeb1d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.530535] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1652a5cd82 [ 42.531146] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1651e96000 [ 42.531756] RBP: 00007f1651e96000 R08: 0000000000000009 R09: 0000000000001000 [ 42.532356] R10: 0000000000000812 R11: 0000000000000206 R12: 000055866eff6d90 [ 42.532982] R13: 00007ffe84aeb1f0 R14: 00007ffe84aeb220 R15: 00007ffe84aeb580 [ 42.533604] [ 42.533819] [ 42.533978] Allocated by task 211: [ 42.534293] kasan_save_stack+0x22/0x50 [ 42.534664] kasan_set_track+0x25/0x30 [ 42.535028] __kasan_slab_alloc+0x59/0x70 [ 42.535414] kmem_cache_alloc+0x16b/0x370 [ 42.535785] vm_area_dup+0x20/0x160 [ 42.536117] __split_vma+0x170/0x950 [ 42.536466] split_vma+0xc6/0x110 [ 42.536783] mprotect_fixup+0x8d2/0xb30 [ 42.537143] do_mprotect_pkey+0x87e/0xd40 [ 42.537520] __x64_sys_mprotect+0x78/0xc0 [ 42.537902] do_syscall_64+0x3f/0x90 [ 42.538244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.538705] [ 42.538862] Freed by task 211: [ 42.539140] kasan_save_stack+0x22/0x50 [ 42.539510] kasan_set_track+0x25/0x30 [ 42.539866] kasan_save_free_info+0x2b/0x50 [ 42.540246] __kasan_slab_free+0x10a/0x190 [ 42.540639] kmem_cache_free+0x10d/0x4d0 [ 42.541008] rcu_core+0x8c8/0x2860 [ 42.541329] __do_softirq+0x1b7/0x7d4 [ 42.541671] [ 42.541828] Last potentially related work creation: [ 42.542252] kasan_save_stack+0x22/0x50 [ 42.542616] __kasan_record_aux_stack+0x8e/0xa0 [ 42.543028] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.543493] remove_vma+0x139/0x170 [ 42.543818] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.544216] do_vmi_munmap+0x1f1/0x2b0 [ 42.544577] __vm_munmap+0x138/0x3a0 [ 42.544914] __x64_sys_munmap+0x59/0x80 [ 42.545270] do_syscall_64+0x3f/0x90 [ 42.545613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.546074] [ 42.546226] The buggy address belongs to the object at ffff88800e05bae0 [ 42.546226] which belongs to the cache vm_area_struct of size 168 [ 42.547283] The buggy address is located 88 bytes inside of [ 42.547283] freed 168-byte region [ffff88800e05bae0, ffff88800e05bb88) [ 42.548290] [ 42.548466] The buggy address belongs to the physical page: [ 42.548943] page:0000000056f1db6d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe05b [ 42.549727] memcg:ffff88800ef1ea01 [ 42.550036] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.550543] page_type: 0xffffffff() [ 42.550868] raw: 0100000000000200 ffff88800879fc80 ffffea000032a480 dead000000000003 [ 42.551523] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef1ea01 [ 42.552170] page dumped because: kasan: bad access detected [ 42.552652] [ 42.552813] Memory state around the buggy address: [ 42.553231] ffff88800e05ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.553845] ffff88800e05ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 42.554445] >ffff88800e05bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.555052] ^ [ 42.555485] ffff88800e05bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 42.556263] ffff88800e05bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 42.556896] ================================================================== [ 42.557707] Disabling lock debugging due to kernel taint [ 44.826100] BUG: Bad rss-counter state mm:00000000ca1a6cdf type:MM_FILEPAGES val:33 [ 44.826992] BUG: Bad rss-counter state mm:00000000ca1a6cdf type:MM_ANONPAGES val:22 [ 45.403791] BUG: Bad rss-counter state mm:00000000a2ef13bc type:MM_FILEPAGES val:33 [ 45.404887] BUG: Bad rss-counter state mm:00000000a2ef13bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56151' (ECDSA) to the list of known hosts. 2023/06/19 13:40:24 fuzzer started 2023/06/19 13:40:25 dialing manager at localhost:44161 2023/06/19 13:40:25 checking machine... 2023/06/19 13:40:25 checking revisions... [ 46.112479] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:40:25 testing simple program... [ 46.167044] cgroup: Unknown subsys name 'net' [ 46.206052] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:40:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888013407580 RCX=0000000000000001 RDX=1ffff11002680eb0 RSI=ffff888013407c80 RDI=ffff888013407580 RBP=ffff888013407c80 RSP=ffff8880134074d8 R8 =0000000000000001 R9 =ffff8880134075c0 R10=0000000000038001 R11=000000000008a85c R12=0000000000000008 R13=ffff8880134075c8 R14=ffff888013407c80 R15=ffff888013407580 RIP=ffffffff81130428 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 00007f55f05c4900 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=00007ffcdd04d000 CR3=000000000f808000 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=563412feff00545000000000000080fe 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=00007f752ddc90b0 CR3=0000000018fac000 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=2034323a30343a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a30343a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000