syzkaller login: [ 38.855462] BUG: Bad rss-counter state mm:00000000b64e2ac5 type:MM_FILEPAGES val:33 [ 38.856800] BUG: Bad rss-counter state mm:00000000b64e2ac5 type:MM_ANONPAGES val:22 [ 38.912161] ================================================================== [ 38.913052] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.913926] Read of size 8 at addr ffff88801a3d6880 by task sshd/220 [ 38.914817] [ 38.915028] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.915836] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.916817] Call Trace: [ 38.917120] [ 38.917392] dump_stack_lvl+0x91/0xf0 [ 38.917858] print_report+0xcc/0x620 [ 38.918315] ? __virt_addr_valid+0x102/0x340 [ 38.918842] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.919429] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.920005] kasan_report+0xbe/0xf0 [ 38.920451] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.921083] vma_interval_tree_remove+0xc75/0xec0 [ 38.921656] vma_prepare+0xc54/0x11a0 [ 38.922107] __split_vma+0x5af/0x950 [ 38.922564] ? __pfx___split_vma+0x10/0x10 [ 38.923079] ? find_held_lock+0x2c/0x110 [ 38.923596] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.924152] ? lock_is_held_type+0x9f/0x120 [ 38.924691] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.925317] ? mtree_range_walk+0x632/0x900 [ 38.925852] ? mas_walk+0x5c7/0x7c0 [ 38.926311] do_vmi_munmap+0x1f1/0x2b0 [ 38.926798] mmap_region+0x1f9/0x2660 [ 38.927268] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.927774] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.928491] ? __pfx_lock_acquire+0x10/0x10 [ 38.929070] ? __pfx_mmap_region+0x10/0x10 [ 38.929605] ? security_mmap_addr+0x7d/0xa0 [ 38.930135] ? get_unmapped_area+0x1f5/0x3f0 [ 38.930681] do_mmap+0x854/0xf00 [ 38.931120] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.931606] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.932159] ksys_mmap_pgoff+0x3af/0x500 [ 38.932672] do_syscall_64+0x3f/0x90 [ 38.933152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.933786] RIP: 0033:0x7f0542e77d82 [ 38.934239] 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 [ 38.936330] RSP: 002b:00007ffeab32bd68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.937279] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0542e77d82 [ 38.938124] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05422b1000 [ 38.938970] RBP: 00007f05422b1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.939818] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc88cb3ec0 [ 38.940676] R13: 00007ffeab32bd80 R14: 00007ffeab32bdb0 R15: 00007ffeab32c110 [ 38.941554] [ 38.941847] [ 38.942061] Allocated by task 213: [ 38.942496] kasan_save_stack+0x22/0x50 [ 38.942993] kasan_set_track+0x25/0x30 [ 38.943482] __kasan_slab_alloc+0x59/0x70 [ 38.944002] kmem_cache_alloc+0x16b/0x370 [ 38.944518] vm_area_dup+0x20/0x160 [ 38.945000] __split_vma+0x170/0x950 [ 38.945462] split_vma+0xc6/0x110 [ 38.945896] mprotect_fixup+0x8d2/0xb30 [ 38.946402] do_mprotect_pkey+0x87e/0xd40 [ 38.946926] __x64_sys_mprotect+0x78/0xc0 [ 38.947453] do_syscall_64+0x3f/0x90 [ 38.947914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.948545] [ 38.948807] Freed by task 213: [ 38.949198] kasan_save_stack+0x22/0x50 [ 38.949698] kasan_set_track+0x25/0x30 [ 38.950181] kasan_save_free_info+0x2b/0x50 [ 38.950702] __kasan_slab_free+0x10a/0x190 [ 38.951237] kmem_cache_free+0x10d/0x4d0 [ 38.951742] rcu_core+0x8c8/0x2860 [ 38.952190] __do_softirq+0x1b7/0x7d4 [ 38.952654] [ 38.952900] Last potentially related work creation: [ 38.953485] kasan_save_stack+0x22/0x50 [ 38.953978] __kasan_record_aux_stack+0x8e/0xa0 [ 38.954544] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.955185] remove_vma+0x139/0x170 [ 38.955633] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.956191] do_vmi_munmap+0x1f1/0x2b0 [ 38.956699] __vm_munmap+0x138/0x3a0 [ 38.957162] __x64_sys_munmap+0x59/0x80 [ 38.957649] do_syscall_64+0x3f/0x90 [ 38.958124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.958752] [ 38.958963] The buggy address belongs to the object at ffff88801a3d6828 [ 38.958963] which belongs to the cache vm_area_struct of size 168 [ 38.960434] The buggy address is located 88 bytes inside of [ 38.960434] freed 168-byte region [ffff88801a3d6828, ffff88801a3d68d0) [ 38.961857] [ 38.962073] The buggy address belongs to the physical page: [ 38.962729] page:000000004520cd19 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3d6 [ 38.963786] memcg:ffff88800caf4001 [ 38.964212] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.964884] page_type: 0xffffffff() [ 38.965331] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.966236] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800caf4001 [ 38.967132] page dumped because: kasan: bad access detected [ 38.967779] [ 38.967991] Memory state around the buggy address: [ 38.968568] ffff88801a3d6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.969444] ffff88801a3d6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.970300] >ffff88801a3d6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.971096] ^ [ 38.971483] ffff88801a3d6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.972281] ffff88801a3d6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.973133] ================================================================== [ 38.974457] Disabling lock debugging due to kernel taint [ 41.651309] BUG: Bad rss-counter state mm:00000000faac21a3 type:MM_FILEPAGES val:33 [ 41.652254] BUG: Bad rss-counter state mm:00000000faac21a3 type:MM_ANONPAGES val:22 [ 42.124459] BUG: Bad rss-counter state mm:00000000ce7547f9 type:MM_FILEPAGES val:33 [ 42.125534] BUG: Bad rss-counter state mm:00000000ce7547f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25480' (ECDSA) to the list of known hosts. 2023/06/20 00:34:28 fuzzer started 2023/06/20 00:34:28 dialing manager at localhost:44161 2023/06/20 00:34:28 checking machine... 2023/06/20 00:34:28 checking revisions... [ 42.841201] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:34:28 testing simple program... [ 42.893917] cgroup: Unknown subsys name 'net' [ 42.944627] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:34:21 Registers: info registers vcpu 0 RAX=1ffffffff0bb97d4 RBX=ffffffff85dcbea4 RCX=ffffffff81496309 RDX=0000000000000000 RSI=ffffffff860ee3fe RDI=ffffffff85dcbea0 RBP=ffffffff85dcbea4 RSP=ffff888018e4f2f0 R8 =ffffffff860ee3fe R9 =ffff888018e4f3e8 R10=0000000000038001 R11=0000000000014ab3 R12=ffffffff85dcbea4 R13=ffffffff85dcbea0 R14=ffffffff85dcbea0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f9f350c8900 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=00007ffea161a000 CR3=000000000edce000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f5654cad970 CR3=00000000097a4000 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=aadea4dd188c3b95244d4516b675334f XMM02=000000000011cb98ec2efd57dc4c00df XMM03=00000000001240b090ca4f091a85b920 XMM04=76ce535f432233df00000000000ae988 XMM05=19e9129bd510f2350000000000133c30 XMM06=fa118848a17910950000000000132a98 XMM07=e042d86d42eb936e0000000000124330 XMM08=90ca4f091a85b920000000000011cbf8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000