syzkaller login: [ 31.769039] BUG: Bad rss-counter state mm:000000000a07c44c type:MM_FILEPAGES val:33 [ 31.770253] BUG: Bad rss-counter state mm:000000000a07c44c type:MM_ANONPAGES val:22 [ 31.805071] ================================================================== [ 31.806047] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.806982] Read of size 8 at addr ffff88800e94bed8 by task sshd/219 [ 31.807869] [ 31.808091] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.808959] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.809949] Call Trace: [ 31.810275] [ 31.810568] dump_stack_lvl+0x91/0xf0 [ 31.811056] print_report+0xcc/0x620 [ 31.811538] ? __virt_addr_valid+0x102/0x340 [ 31.812088] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.812704] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.813339] kasan_report+0xbe/0xf0 [ 31.813819] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.814443] vma_interval_tree_remove+0xc75/0xec0 [ 31.815053] vma_prepare+0xc54/0x11a0 [ 31.815542] __split_vma+0x5af/0x950 [ 31.816042] ? __pfx___split_vma+0x10/0x10 [ 31.816605] ? find_held_lock+0x2c/0x110 [ 31.817180] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.817775] ? lock_is_held_type+0x9f/0x120 [ 31.818349] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.818996] ? mtree_range_walk+0x632/0x900 [ 31.819590] ? mas_walk+0x5c7/0x7c0 [ 31.820095] do_vmi_munmap+0x1f1/0x2b0 [ 31.820620] mmap_region+0x1f9/0x2660 [ 31.821131] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.821665] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.822412] ? __pfx_lock_acquire+0x10/0x10 [ 31.822974] ? __pfx_mmap_region+0x10/0x10 [ 31.823540] ? security_mmap_addr+0x7d/0xa0 [ 31.824097] ? get_unmapped_area+0x1f5/0x3f0 [ 31.824683] do_mmap+0x854/0xf00 [ 31.825172] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.825691] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.826282] ksys_mmap_pgoff+0x3af/0x500 [ 31.826809] do_syscall_64+0x3f/0x90 [ 31.827317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.828007] RIP: 0033:0x7f39ec15dd82 [ 31.828490] 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 [ 31.830747] RSP: 002b:00007ffdf00c0c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.831723] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39ec15dd82 [ 31.832638] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39eb597000 [ 31.833542] RBP: 00007f39eb597000 R08: 0000000000000009 R09: 0000000000001000 [ 31.834445] R10: 0000000000000812 R11: 0000000000000206 R12: 000055812a11dec0 [ 31.835347] R13: 00007ffdf00c0c50 R14: 00007ffdf00c0c80 R15: 00007ffdf00c0fe0 [ 31.836244] [ 31.836552] [ 31.836796] Allocated by task 212: [ 31.837247] kasan_save_stack+0x22/0x50 [ 31.837776] kasan_set_track+0x25/0x30 [ 31.838302] __kasan_slab_alloc+0x59/0x70 [ 31.838862] kmem_cache_alloc+0x16b/0x370 [ 31.839413] vm_area_dup+0x20/0x160 [ 31.839891] __split_vma+0x170/0x950 [ 31.840385] split_vma+0xc6/0x110 [ 31.840857] mprotect_fixup+0x8d2/0xb30 [ 31.841392] do_mprotect_pkey+0x87e/0xd40 [ 31.841942] __x64_sys_mprotect+0x78/0xc0 [ 31.842482] do_syscall_64+0x3f/0x90 [ 31.842989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.843673] [ 31.843906] Freed by task 212: [ 31.844322] kasan_save_stack+0x22/0x50 [ 31.844862] kasan_set_track+0x25/0x30 [ 31.845389] kasan_save_free_info+0x2b/0x50 [ 31.845951] __kasan_slab_free+0x10a/0x190 [ 31.846511] kmem_cache_free+0x10d/0x4d0 [ 31.847042] rcu_core+0x8c8/0x2860 [ 31.847511] __do_softirq+0x1b7/0x7d4 [ 31.848011] [ 31.848242] Last potentially related work creation: [ 31.848884] kasan_save_stack+0x22/0x50 [ 31.849413] __kasan_record_aux_stack+0x8e/0xa0 [ 31.850016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.850699] remove_vma+0x139/0x170 [ 31.851178] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.851770] do_vmi_munmap+0x1f1/0x2b0 [ 31.852287] __vm_munmap+0x138/0x3a0 [ 31.852786] __x64_sys_munmap+0x59/0x80 [ 31.853301] do_syscall_64+0x3f/0x90 [ 31.853803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.854477] [ 31.854701] Second to last potentially related work creation: [ 31.855413] kasan_save_stack+0x22/0x50 [ 31.855938] __kasan_record_aux_stack+0x8e/0xa0 [ 31.856538] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.857227] remove_vma+0x139/0x170 [ 31.857711] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.858306] do_vmi_munmap+0x1f1/0x2b0 [ 31.858829] mmap_region+0x1f9/0x2660 [ 31.859335] do_mmap+0x854/0xf00 [ 31.859783] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.860297] ksys_mmap_pgoff+0x7d/0x500 [ 31.860830] do_syscall_64+0x3f/0x90 [ 31.861338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.862012] [ 31.862241] The buggy address belongs to the object at ffff88800e94be80 [ 31.862241] which belongs to the cache vm_area_struct of size 168 [ 31.863808] The buggy address is located 88 bytes inside of [ 31.863808] freed 168-byte region [ffff88800e94be80, ffff88800e94bf28) [ 31.865300] [ 31.865527] The buggy address belongs to the physical page: [ 31.866234] page:00000000b2d085f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe94b [ 31.867399] memcg:ffff88800eac5c01 [ 31.867857] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.868550] page_type: 0xffffffff() [ 31.869035] raw: 0100000000000200 ffff88800879fc80 ffffea000037c280 dead000000000004 [ 31.870012] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eac5c01 [ 31.870991] page dumped because: kasan: bad access detected [ 31.871684] [ 31.871915] Memory state around the buggy address: [ 31.872526] ffff88800e94bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.873457] ffff88800e94be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.874360] >ffff88800e94be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.875258] ^ [ 31.876019] ffff88800e94bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.876936] ffff88800e94bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.877841] ================================================================== [ 31.878959] Disabling lock debugging due to kernel taint [ 33.884848] BUG: Bad rss-counter state mm:00000000d77d9453 type:MM_FILEPAGES val:33 [ 33.886385] BUG: Bad rss-counter state mm:00000000d77d9453 type:MM_ANONPAGES val:22 [ 34.348348] BUG: Bad rss-counter state mm:00000000075b89fc type:MM_FILEPAGES val:33 [ 34.349428] BUG: Bad rss-counter state mm:00000000075b89fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7934' (ECDSA) to the list of known hosts. 2023/06/20 01:36:58 fuzzer started 2023/06/20 01:36:58 dialing manager at localhost:44161 2023/06/20 01:36:58 checking machine... 2023/06/20 01:36:58 checking revisions... [ 35.069991] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:36:58 testing simple program... [ 35.126822] cgroup: Unknown subsys name 'net' [ 35.168899] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:36:57 Registers: info registers vcpu 0 RAX=ffffffff8180cd09 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff11001e49e36 RSI=ffffffff8180cd09 RDI=ffff88800f24f220 RBP=ffff88800f24f1f0 RSP=ffff88800f24f150 R8 =ffffffff86137542 R9 =ffff88800f24f198 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800f24f220 R13=0000000000000000 R14=ffff888016959b40 R15=0000000000092cc0 RIP=ffffffff813ad420 RFL=00000286 [--S--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 00007f2ba096c900 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=00007ffd737a4000 CR3=0000000018c52000 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=1ffff110019724ab RBX=ffff88800cb92528 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cb92558 RBP=ffff8880143faeb0 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff8880143faeb0 R14=ffffffff813782a8 R15=ffff88800dcf0300 RIP=ffffffff8184636c 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 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=00007fa65796acb0 CR3=000000000e9d8000 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=36333a3130203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343835 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000