syzkaller login: [ 30.279424] BUG: Bad rss-counter state mm:00000000262f09c0 type:MM_FILEPAGES val:33 [ 30.280447] BUG: Bad rss-counter state mm:00000000262f09c0 type:MM_ANONPAGES val:22 [ 30.457296] ================================================================== [ 30.458265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.459241] Read of size 8 at addr ffff888019f526b0 by task sshd/219 [ 30.460140] [ 30.460374] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.461289] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.462305] Call Trace: [ 30.462693] [ 30.463060] dump_stack_lvl+0x91/0xf0 [ 30.463703] print_report+0xcc/0x620 [ 30.464332] ? __virt_addr_valid+0x102/0x340 [ 30.465086] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.465878] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.466676] kasan_report+0xbe/0xf0 [ 30.467294] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.468068] vma_interval_tree_remove+0xc75/0xec0 [ 30.468720] vma_prepare+0xc54/0x11a0 [ 30.469254] __split_vma+0x5af/0x950 [ 30.469739] ? __pfx___split_vma+0x10/0x10 [ 30.470418] ? find_held_lock+0x2c/0x110 [ 30.471052] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.471647] ? lock_is_held_type+0x9f/0x120 [ 30.472214] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.472874] ? mtree_range_walk+0x632/0x900 [ 30.473461] ? mas_walk+0x5c7/0x7c0 [ 30.473960] do_vmi_munmap+0x1f1/0x2b0 [ 30.474472] mmap_region+0x1f9/0x2660 [ 30.474981] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.475515] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.476271] ? __pfx_lock_acquire+0x10/0x10 [ 30.476869] ? __pfx_mmap_region+0x10/0x10 [ 30.477437] ? security_mmap_addr+0x7d/0xa0 [ 30.478007] ? get_unmapped_area+0x1f5/0x3f0 [ 30.478576] do_mmap+0x854/0xf00 [ 30.479040] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.479561] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.480152] ksys_mmap_pgoff+0x3af/0x500 [ 30.480699] do_syscall_64+0x3f/0x90 [ 30.481221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.481910] RIP: 0033:0x7f4fc9633d82 [ 30.482391] 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 [ 30.484643] RSP: 002b:00007ffc4bab8ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.485616] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4fc9633d82 [ 30.486508] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4fc8a6d000 [ 30.487413] RBP: 00007f4fc8a6d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.488287] R10: 0000000000000812 R11: 0000000000000206 R12: 000055997f579b20 [ 30.489210] R13: 00007ffc4bab8b00 R14: 00007ffc4bab8b30 R15: 00007ffc4bab8e90 [ 30.490123] [ 30.490426] [ 30.490647] Allocated by task 212: [ 30.491112] kasan_save_stack+0x22/0x50 [ 30.491652] kasan_set_track+0x25/0x30 [ 30.492172] __kasan_slab_alloc+0x59/0x70 [ 30.492733] kmem_cache_alloc+0x16b/0x370 [ 30.493308] vm_area_dup+0x20/0x160 [ 30.493786] __split_vma+0x170/0x950 [ 30.494287] split_vma+0xc6/0x110 [ 30.494748] mprotect_fixup+0x8d2/0xb30 [ 30.495276] do_mprotect_pkey+0x87e/0xd40 [ 30.495826] __x64_sys_mprotect+0x78/0xc0 [ 30.496409] do_syscall_64+0x3f/0x90 [ 30.496933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.497597] [ 30.497825] Freed by task 212: [ 30.498253] kasan_save_stack+0x22/0x50 [ 30.498779] kasan_set_track+0x25/0x30 [ 30.499296] kasan_save_free_info+0x2b/0x50 [ 30.499860] __kasan_slab_free+0x10a/0x190 [ 30.500446] kmem_cache_free+0x10d/0x4d0 [ 30.500984] rcu_core+0x8c8/0x2860 [ 30.501451] __do_softirq+0x1b7/0x7d4 [ 30.501956] [ 30.502178] Last potentially related work creation: [ 30.502793] kasan_save_stack+0x22/0x50 [ 30.503335] __kasan_record_aux_stack+0x8e/0xa0 [ 30.503937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.504621] remove_vma+0x139/0x170 [ 30.505098] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.505682] do_vmi_munmap+0x1f1/0x2b0 [ 30.506209] __vm_munmap+0x138/0x3a0 [ 30.506700] __x64_sys_munmap+0x59/0x80 [ 30.507241] do_syscall_64+0x3f/0x90 [ 30.507738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.508434] [ 30.508653] The buggy address belongs to the object at ffff888019f52658 [ 30.508653] which belongs to the cache vm_area_struct of size 168 [ 30.510213] The buggy address is located 88 bytes inside of [ 30.510213] freed 168-byte region [ffff888019f52658, ffff888019f52700) [ 30.511725] [ 30.511995] The buggy address belongs to the physical page: [ 30.512868] page:00000000bf6f0db4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f52 [ 30.514340] memcg:ffff88800f719e01 [ 30.514915] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.515766] page_type: 0xffffffff() [ 30.516360] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.517564] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f719e01 [ 30.518781] page dumped because: kasan: bad access detected [ 30.519662] [ 30.519936] Memory state around the buggy address: [ 30.520716] ffff888019f52580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.521851] ffff888019f52600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.523000] >ffff888019f52680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.524132] ^ [ 30.524958] ffff888019f52700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.526080] ffff888019f52780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.527198] ================================================================== [ 30.528575] Disabling lock debugging due to kernel taint [ 32.908460] BUG: Bad rss-counter state mm:00000000b3210545 type:MM_FILEPAGES val:33 [ 32.909505] BUG: Bad rss-counter state mm:00000000b3210545 type:MM_ANONPAGES val:22 [ 33.303344] BUG: Bad rss-counter state mm:00000000fb0b4fb9 type:MM_FILEPAGES val:33 [ 33.304402] BUG: Bad rss-counter state mm:00000000fb0b4fb9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3500' (ECDSA) to the list of known hosts. 2023/06/19 13:01:03 fuzzer started 2023/06/19 13:01:04 dialing manager at localhost:44161 2023/06/19 13:01:04 checking machine... 2023/06/19 13:01:04 checking revisions... [ 34.031565] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:01:04 testing simple program... [ 34.079666] cgroup: Unknown subsys name 'net' [ 34.129838] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:01:02 Registers: info registers vcpu 0 RAX=ffffffff83643857 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88806ce09ab8 RSI=ffffffff83643857 RDI=ffff88806ce09a70 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000008ab76 R12=ffff88806ce09b38 R13=ffff88806ce09ab8 R14=ffff888014768000 R15=ffff88806ce09a70 RIP=ffffffff81130641 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 00007fc4edfae900 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=00007f1ea3243650 CR3=000000000d696000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=ce6fb054f3a96a9f00000000000ae988 XMM05=077f8f487632c3cc0000000000134f38 XMM06=806171799158d9670000000000133d28 XMM07=fb795ef6d65770560000000000124348 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800dbf6a80 RBX=ffff88800c5e13f8 RCX=1ffff11001b6ee14 RDX=dffffc0000000000 RSI=ffff88800dbe96f0 RDI=ffff88800c5e1428 RBP=ffff88800db77070 RSP=ffff88801a06fca8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800dbe9678 R13=0000000000000000 R14=ffff888018f4b3d8 R15=ffff888018f4b390 RIP=ffffffff81847508 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 00007f1ea2c8e900 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=00007f1ea32460b0 CR3=000000000f77e000 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=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