syzkaller login: [ 33.775868] BUG: Bad rss-counter state mm:00000000092d2af8 type:MM_FILEPAGES val:33 [ 33.776992] BUG: Bad rss-counter state mm:00000000092d2af8 type:MM_ANONPAGES val:22 [ 33.822185] ================================================================== [ 33.823210] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.824171] Read of size 8 at addr ffff88800df6c798 by task sshd/220 [ 33.824995] [ 33.825214] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.826081] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.827062] Call Trace: [ 33.827400] [ 33.827683] dump_stack_lvl+0x91/0xf0 [ 33.828188] print_report+0xcc/0x620 [ 33.828692] ? __virt_addr_valid+0x102/0x340 [ 33.829253] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.829871] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.830491] kasan_report+0xbe/0xf0 [ 33.830976] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.831599] vma_interval_tree_remove+0xc75/0xec0 [ 33.832198] vma_prepare+0xc54/0x11a0 [ 33.832699] __split_vma+0x5af/0x950 [ 33.833174] ? __pfx___split_vma+0x10/0x10 [ 33.833699] ? find_held_lock+0x2c/0x110 [ 33.834225] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.834787] ? lock_is_held_type+0x9f/0x120 [ 33.835319] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.835928] ? mtree_range_walk+0x632/0x900 [ 33.836487] ? mas_walk+0x5c7/0x7c0 [ 33.836959] do_vmi_munmap+0x1f1/0x2b0 [ 33.837446] mmap_region+0x1f9/0x2660 [ 33.837929] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.838435] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.839148] ? __pfx_lock_acquire+0x10/0x10 [ 33.839682] ? __pfx_mmap_region+0x10/0x10 [ 33.840205] ? security_mmap_addr+0x7d/0xa0 [ 33.840755] ? get_unmapped_area+0x1f5/0x3f0 [ 33.841298] do_mmap+0x854/0xf00 [ 33.841742] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.842237] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.842799] ksys_mmap_pgoff+0x3af/0x500 [ 33.843301] do_syscall_64+0x3f/0x90 [ 33.843780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.844424] RIP: 0033:0x7f062c1d8d82 [ 33.844879] 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 [ 33.846978] RSP: 002b:00007ffcb1438898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.847895] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f062c1d8d82 [ 33.848762] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f062b612000 [ 33.849602] RBP: 00007f062b612000 R08: 0000000000000009 R09: 0000000000001000 [ 33.850436] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563626193ec0 [ 33.851296] R13: 00007ffcb14388b0 R14: 00007ffcb14388e0 R15: 00007ffcb1438c40 [ 33.852151] [ 33.852463] [ 33.852681] Allocated by task 213: [ 33.853108] kasan_save_stack+0x22/0x50 [ 33.853616] kasan_set_track+0x25/0x30 [ 33.854111] __kasan_slab_alloc+0x59/0x70 [ 33.854640] kmem_cache_alloc+0x16b/0x370 [ 33.855159] vm_area_dup+0x20/0x160 [ 33.855612] __split_vma+0x170/0x950 [ 33.856084] split_vma+0xc6/0x110 [ 33.856535] mprotect_fixup+0x8d2/0xb30 [ 33.857036] do_mprotect_pkey+0x87e/0xd40 [ 33.857559] __x64_sys_mprotect+0x78/0xc0 [ 33.858083] do_syscall_64+0x3f/0x90 [ 33.858552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.859187] [ 33.859399] Freed by task 213: [ 33.859790] kasan_save_stack+0x22/0x50 [ 33.860315] kasan_set_track+0x25/0x30 [ 33.860808] kasan_save_free_info+0x2b/0x50 [ 33.861339] __kasan_slab_free+0x10a/0x190 [ 33.861875] kmem_cache_free+0x10d/0x4d0 [ 33.862391] rcu_core+0x8c8/0x2860 [ 33.862841] __do_softirq+0x1b7/0x7d4 [ 33.863316] [ 33.863534] Last potentially related work creation: [ 33.864114] kasan_save_stack+0x22/0x50 [ 33.864631] __kasan_record_aux_stack+0x8e/0xa0 [ 33.865211] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.865852] remove_vma+0x139/0x170 [ 33.866312] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.866872] do_vmi_munmap+0x1f1/0x2b0 [ 33.867354] __vm_munmap+0x138/0x3a0 [ 33.867825] __x64_sys_munmap+0x59/0x80 [ 33.868337] do_syscall_64+0x3f/0x90 [ 33.868809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.869451] [ 33.869667] Second to last potentially related work creation: [ 33.870349] kasan_save_stack+0x22/0x50 [ 33.870854] __kasan_record_aux_stack+0x8e/0xa0 [ 33.871423] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.872081] remove_vma+0x139/0x170 [ 33.872548] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.873110] do_vmi_munmap+0x1f1/0x2b0 [ 33.873600] mmap_region+0x1f9/0x2660 [ 33.874077] do_mmap+0x854/0xf00 [ 33.874508] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.875001] ksys_mmap_pgoff+0x3af/0x500 [ 33.875497] do_syscall_64+0x3f/0x90 [ 33.875967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.876613] [ 33.876829] The buggy address belongs to the object at ffff88800df6c740 [ 33.876829] which belongs to the cache vm_area_struct of size 168 [ 33.878295] The buggy address is located 88 bytes inside of [ 33.878295] freed 168-byte region [ffff88800df6c740, ffff88800df6c7e8) [ 33.879710] [ 33.879925] The buggy address belongs to the physical page: [ 33.880592] page:0000000007c46e99 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf6c [ 33.881685] memcg:ffff8880092c4b01 [ 33.882107] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.882747] page_type: 0xffffffff() [ 33.883196] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 33.884120] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880092c4b01 [ 33.885026] page dumped because: kasan: bad access detected [ 33.885686] [ 33.885900] Memory state around the buggy address: [ 33.886473] ffff88800df6c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.887318] ffff88800df6c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.888168] >ffff88800df6c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.889032] ^ [ 33.889522] ffff88800df6c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 33.890374] ffff88800df6c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 33.891213] ================================================================== [ 33.892290] Disabling lock debugging due to kernel taint [ 35.902944] BUG: Bad rss-counter state mm:00000000c8106ba8 type:MM_FILEPAGES val:33 [ 35.904094] BUG: Bad rss-counter state mm:00000000c8106ba8 type:MM_ANONPAGES val:22 [ 36.335429] BUG: Bad rss-counter state mm:00000000a9183cfd type:MM_FILEPAGES val:33 [ 36.336649] BUG: Bad rss-counter state mm:00000000a9183cfd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1244' (ECDSA) to the list of known hosts. 2023/06/20 00:08:34 fuzzer started 2023/06/20 00:08:34 dialing manager at localhost:44161 2023/06/20 00:08:34 checking machine... 2023/06/20 00:08:34 checking revisions... [ 37.014013] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:08:34 testing simple program... [ 37.066813] cgroup: Unknown subsys name 'net' [ 37.107831] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:08:31 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000f4a69333 RCX=ffff88806c749998 RDX=0000000000000010 RSI=0000000000000002 RDI=000000009cb47aff RBP=ffff888014225c20 RSP=ffff88800fedf918 R8 =00000000169f40b4 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092cc0 R14=ffff88800fedf980 R15=0000000000000010 RIP=ffffffff82270f13 RFL=00000206 [-----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 00007f171ef0c900 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=00007f171f4c40b0 CR3=000000001a0aa000 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=2034333a38303a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a38303a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=1ffff1100d9e136d RSI=ffffffff810001ce RDI=ffff88806cf09b68 RBP=000000000000000f RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88801a3bc1b0 RIP=ffffffff813ad46e 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 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=00007f7709851bd0 CR3=000000000da54000 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=335fee5b651ccc9c4c4a6a73e72a04bf XMM02=000000000011fae8eff9b2d0a8fce9cb XMM03=000000000011fbb82c67c8bc2e329bc3 XMM04=73e5a276eb2021b700000000000ae988 XMM05=6704d1a151f66a9b0000000000135e70 XMM06=4fda316b135da52b0000000000134f10 XMM07=e042d86d42eb936e0000000000124468 XMM08=47e884f2e36bce98000000000011fbb8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000