syzkaller login: [ 23.674503] BUG: Bad rss-counter state mm:000000005c9a4e96 type:MM_FILEPAGES val:33 [ 23.675387] BUG: Bad rss-counter state mm:000000005c9a4e96 type:MM_ANONPAGES val:22 [ 23.832054] ================================================================== [ 23.832989] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.833961] Read of size 8 at addr ffff88800de03228 by task sshd/220 [ 23.834861] [ 23.835082] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.836032] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.837024] Call Trace: [ 23.837344] [ 23.837632] dump_stack_lvl+0x91/0xf0 [ 23.838135] print_report+0xcc/0x620 [ 23.838627] ? __virt_addr_valid+0x102/0x340 [ 23.839188] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.839829] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.840449] kasan_report+0xbe/0xf0 [ 23.840939] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.841598] vma_interval_tree_remove+0xc75/0xec0 [ 23.842231] vma_prepare+0xc54/0x11a0 [ 23.842735] __split_vma+0x5af/0x950 [ 23.843239] ? __pfx___split_vma+0x10/0x10 [ 23.843814] ? find_held_lock+0x2c/0x110 [ 23.844364] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.844956] ? lock_is_held_type+0x9f/0x120 [ 23.845520] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.846162] ? mtree_range_walk+0x632/0x900 [ 23.846746] ? mas_walk+0x5c7/0x7c0 [ 23.847251] do_vmi_munmap+0x1f1/0x2b0 [ 23.847780] mmap_region+0x1f9/0x2660 [ 23.848289] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.848832] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.849589] ? __pfx_lock_acquire+0x10/0x10 [ 23.850154] ? __pfx_mmap_region+0x10/0x10 [ 23.850720] ? security_mmap_addr+0x7d/0xa0 [ 23.851277] ? get_unmapped_area+0x1f5/0x3f0 [ 23.851875] do_mmap+0x854/0xf00 [ 23.852341] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.852860] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.853449] ksys_mmap_pgoff+0x3af/0x500 [ 23.853998] do_syscall_64+0x3f/0x90 [ 23.854501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.855199] RIP: 0033:0x7f2a97865d82 [ 23.855699] 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 [ 23.857965] RSP: 002b:00007ffc4fd54908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.858935] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a97865d82 [ 23.859835] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a96c9f000 [ 23.860723] RBP: 00007f2a96c9f000 R08: 0000000000000009 R09: 0000000000001000 [ 23.861614] R10: 0000000000000812 R11: 0000000000000206 R12: 000056312bfb7ec0 [ 23.862506] R13: 00007ffc4fd54920 R14: 00007ffc4fd54950 R15: 00007ffc4fd54cb0 [ 23.863406] [ 23.863735] [ 23.863956] Allocated by task 213: [ 23.864411] kasan_save_stack+0x22/0x50 [ 23.864941] kasan_set_track+0x25/0x30 [ 23.865458] __kasan_slab_alloc+0x59/0x70 [ 23.866013] kmem_cache_alloc+0x16b/0x370 [ 23.866553] vm_area_dup+0x20/0x160 [ 23.867039] __split_vma+0x170/0x950 [ 23.867538] split_vma+0xc6/0x110 [ 23.868014] mprotect_fixup+0x8d2/0xb30 [ 23.868542] do_mprotect_pkey+0x87e/0xd40 [ 23.869090] __x64_sys_mprotect+0x78/0xc0 [ 23.869643] do_syscall_64+0x3f/0x90 [ 23.870143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.870822] [ 23.871051] Freed by task 213: [ 23.871467] kasan_save_stack+0x22/0x50 [ 23.872020] kasan_set_track+0x25/0x30 [ 23.872532] kasan_save_free_info+0x2b/0x50 [ 23.873087] __kasan_slab_free+0x10a/0x190 [ 23.873646] kmem_cache_free+0x10d/0x4d0 [ 23.874189] rcu_core+0x8c8/0x2860 [ 23.874653] __do_softirq+0x1b7/0x7d4 [ 23.875151] [ 23.875373] Last potentially related work creation: [ 23.876001] kasan_save_stack+0x22/0x50 [ 23.876534] __kasan_record_aux_stack+0x8e/0xa0 [ 23.877133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.877811] remove_vma+0x139/0x170 [ 23.878282] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.878865] do_vmi_munmap+0x1f1/0x2b0 [ 23.879373] __vm_munmap+0x138/0x3a0 [ 23.880112] __x64_sys_munmap+0x59/0x80 [ 23.880796] do_syscall_64+0x3f/0x90 [ 23.881418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.882236] [ 23.882506] Second to last potentially related work creation: [ 23.883399] kasan_save_stack+0x22/0x50 [ 23.884078] __kasan_record_aux_stack+0x8e/0xa0 [ 23.884670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.885330] remove_vma+0x139/0x170 [ 23.885799] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.886364] do_vmi_munmap+0x1f1/0x2b0 [ 23.886865] mmap_region+0x1f9/0x2660 [ 23.887359] do_mmap+0x854/0xf00 [ 23.887809] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.888308] ksys_mmap_pgoff+0x3af/0x500 [ 23.888819] do_syscall_64+0x3f/0x90 [ 23.889311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.889965] [ 23.890187] The buggy address belongs to the object at ffff88800de031d0 [ 23.890187] which belongs to the cache vm_area_struct of size 168 [ 23.891699] The buggy address is located 88 bytes inside of [ 23.891699] freed 168-byte region [ffff88800de031d0, ffff88800de03278) [ 23.893152] [ 23.893372] The buggy address belongs to the physical page: [ 23.894051] page:00000000d261efe1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde03 [ 23.895167] memcg:ffff88800dd95c01 [ 23.895620] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.896287] page_type: 0xffffffff() [ 23.896748] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.897695] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd95c01 [ 23.898622] page dumped because: kasan: bad access detected [ 23.899304] [ 23.899521] Memory state around the buggy address: [ 23.900128] ffff88800de03100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.901158] ffff88800de03180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 23.902074] >ffff88800de03200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 23.902947] ^ [ 23.903521] ffff88800de03280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.904424] ffff88800de03300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.905299] ================================================================== [ 23.906672] Disabling lock debugging due to kernel taint [ 25.771128] BUG: Bad rss-counter state mm:00000000913da68f type:MM_FILEPAGES val:33 [ 25.771869] BUG: Bad rss-counter state mm:00000000913da68f type:MM_ANONPAGES val:22 [ 26.198942] BUG: Bad rss-counter state mm:00000000082ace74 type:MM_FILEPAGES val:33 [ 26.199691] BUG: Bad rss-counter state mm:00000000082ace74 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18171' (ECDSA) to the list of known hosts. 2023/06/21 07:31:51 fuzzer started 2023/06/21 07:31:51 dialing manager at localhost:36067 2023/06/21 07:31:51 checking machine... 2023/06/21 07:31:51 checking revisions... [ 26.965321] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:31:51 testing simple program... [ 27.018287] cgroup: Unknown subsys name 'net' [ 27.070791] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:31:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000004 RSI=ffffffff84905ec0 RDI=ffff888016149870 RBP=ffff888016149860 RSP=ffff88801cae7d40 R8 =0000000000000002 R9 =0000000000000000 R10=ffff8880161499d3 R11=0000000000000000 R12=ffffffff85b5e4c8 R13=0000000000000000 R14=ffffffff87b6a200 R15=0000000000000000 RIP=ffffffff812db307 RFL=00000212 [----A--] 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 00007fd29a571900 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=00007fd29ab290b0 CR3=000000000e048000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86091f84 RDX=1ffff1100d9e135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86091f88 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000005 R15=ffff88806cf09a98 RIP=ffffffff81130b54 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 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=00007f13d042ec30 CR3=000000000d630000 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=303d39684b72bf80c3465e813a659f9e XMM02=2c67c8bc2e329bc3000000000011bd58 XMM03=fb795ef6d65770560000000000122008 XMM04=854bab26be6534d200000000000ae988 XMM05=3258b18efd310a930000000000134000 XMM06=4fda316b135da52b00000000001330b8 XMM07=e042d86d42eb936e00000000001222e0 XMM08=fd7f037fc9393ef5000000000011bdb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000