syzkaller login: [ 40.305028] BUG: Bad rss-counter state mm:00000000a526b0dc type:MM_FILEPAGES val:33 [ 40.306250] BUG: Bad rss-counter state mm:00000000a526b0dc type:MM_ANONPAGES val:22 [ 40.467433] ================================================================== [ 40.468372] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.469319] Read of size 8 at addr ffff88800de04880 by task sshd/220 [ 40.470104] [ 40.470324] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.471336] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.472333] Call Trace: [ 40.472654] [ 40.472977] dump_stack_lvl+0x91/0xf0 [ 40.473476] print_report+0xcc/0x620 [ 40.473970] ? __virt_addr_valid+0x102/0x340 [ 40.474543] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.475180] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.475808] kasan_report+0xbe/0xf0 [ 40.476284] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.476911] vma_interval_tree_remove+0xc75/0xec0 [ 40.477528] vma_prepare+0xc54/0x11a0 [ 40.478019] __split_vma+0x5af/0x950 [ 40.478501] ? __pfx___split_vma+0x10/0x10 [ 40.479043] ? find_held_lock+0x2c/0x110 [ 40.479591] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.480169] ? lock_is_held_type+0x9f/0x120 [ 40.480711] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.481333] ? mtree_range_walk+0x632/0x900 [ 40.481898] ? mas_walk+0x5c7/0x7c0 [ 40.482377] do_vmi_munmap+0x1f1/0x2b0 [ 40.482883] mmap_region+0x1f9/0x2660 [ 40.483364] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.483909] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.484655] ? __pfx_lock_acquire+0x10/0x10 [ 40.485196] ? __pfx_mmap_region+0x10/0x10 [ 40.485737] ? security_mmap_addr+0x7d/0xa0 [ 40.486270] ? get_unmapped_area+0x1f5/0x3f0 [ 40.486823] do_mmap+0x854/0xf00 [ 40.487265] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.487772] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.488351] ksys_mmap_pgoff+0x3af/0x500 [ 40.488859] do_syscall_64+0x3f/0x90 [ 40.489345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.490000] RIP: 0033:0x7fe44c7a9d82 [ 40.490461] 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 [ 40.492584] RSP: 002b:00007ffe6b4c7a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.493492] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe44c7a9d82 [ 40.494362] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe44bbe3000 [ 40.495219] RBP: 00007fe44bbe3000 R08: 0000000000000009 R09: 0000000000001000 [ 40.496107] R10: 0000000000000812 R11: 0000000000000206 R12: 000055780cefdec0 [ 40.496966] R13: 00007ffe6b4c7a50 R14: 00007ffe6b4c7a80 R15: 00007ffe6b4c7de0 [ 40.497825] [ 40.498119] [ 40.498335] Allocated by task 212: [ 40.498766] kasan_save_stack+0x22/0x50 [ 40.499277] kasan_set_track+0x25/0x30 [ 40.499790] __kasan_slab_alloc+0x59/0x70 [ 40.500314] kmem_cache_alloc+0x16b/0x370 [ 40.500843] vm_area_dup+0x20/0x160 [ 40.501301] __split_vma+0x170/0x950 [ 40.501769] split_vma+0xc6/0x110 [ 40.502218] mprotect_fixup+0x8d2/0xb30 [ 40.502726] do_mprotect_pkey+0x87e/0xd40 [ 40.503249] __x64_sys_mprotect+0x78/0xc0 [ 40.503785] do_syscall_64+0x3f/0x90 [ 40.504263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.504912] [ 40.505134] Freed by task 212: [ 40.505532] kasan_save_stack+0x22/0x50 [ 40.506036] kasan_set_track+0x25/0x30 [ 40.506537] kasan_save_free_info+0x2b/0x50 [ 40.507069] __kasan_slab_free+0x10a/0x190 [ 40.507626] kmem_cache_free+0x10d/0x4d0 [ 40.508143] rcu_core+0x8c8/0x2860 [ 40.508595] __do_softirq+0x1b7/0x7d4 [ 40.509080] [ 40.509300] Last potentially related work creation: [ 40.509891] kasan_save_stack+0x22/0x50 [ 40.510400] __kasan_record_aux_stack+0x8e/0xa0 [ 40.510983] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.511628] remove_vma+0x139/0x170 [ 40.512087] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.512644] do_vmi_munmap+0x1f1/0x2b0 [ 40.513135] __vm_munmap+0x138/0x3a0 [ 40.513613] __x64_sys_munmap+0x59/0x80 [ 40.514117] do_syscall_64+0x3f/0x90 [ 40.514587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.515230] [ 40.515453] Second to last potentially related work creation: [ 40.516135] kasan_save_stack+0x22/0x50 [ 40.516645] __kasan_record_aux_stack+0x8e/0xa0 [ 40.517220] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.517863] remove_vma+0x139/0x170 [ 40.518314] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.518874] do_vmi_munmap+0x1f1/0x2b0 [ 40.519369] mmap_region+0x1f9/0x2660 [ 40.519873] do_mmap+0x854/0xf00 [ 40.520313] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.520809] ksys_mmap_pgoff+0x3af/0x500 [ 40.521310] do_syscall_64+0x3f/0x90 [ 40.521784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.522430] [ 40.522653] The buggy address belongs to the object at ffff88800de04828 [ 40.522653] which belongs to the cache vm_area_struct of size 168 [ 40.524132] The buggy address is located 88 bytes inside of [ 40.524132] freed 168-byte region [ffff88800de04828, ffff88800de048d0) [ 40.525530] [ 40.525757] The buggy address belongs to the physical page: [ 40.526432] page:000000005c64cac9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde04 [ 40.527520] memcg:ffff88800e0b6601 [ 40.527953] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.528657] page_type: 0xffffffff() [ 40.529110] raw: 0100000000000200 ffff88800879fc80 ffffea00003169c0 dead000000000005 [ 40.530033] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0b6601 [ 40.530938] page dumped because: kasan: bad access detected [ 40.531621] [ 40.531841] Memory state around the buggy address: [ 40.532444] ffff88800de04780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.533310] ffff88800de04800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.534178] >ffff88800de04880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.535027] ^ [ 40.535448] ffff88800de04900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.536299] ffff88800de04980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 40.537158] ================================================================== [ 40.538198] Disabling lock debugging due to kernel taint [ 42.277763] BUG: Bad rss-counter state mm:00000000c8d67364 type:MM_FILEPAGES val:33 [ 42.278788] BUG: Bad rss-counter state mm:00000000c8d67364 type:MM_ANONPAGES val:22 [ 42.757100] BUG: Bad rss-counter state mm:00000000e898b99d type:MM_FILEPAGES val:33 [ 42.758129] BUG: Bad rss-counter state mm:00000000e898b99d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3096' (ECDSA) to the list of known hosts. 2023/06/19 21:32:25 fuzzer started 2023/06/19 21:32:26 dialing manager at localhost:44161 2023/06/19 21:32:26 checking machine... 2023/06/19 21:32:26 checking revisions... [ 43.484200] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:32:26 testing simple program... [ 43.562441] cgroup: Unknown subsys name 'net' [ 43.646638] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:32:24 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff87f94640 RCX=ffffffff81893891 RDX=ffff88800d881b40 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff888018f9c400 RSP=ffff888015c178a8 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff888018f9c400 R11=0000000000000001 R12=0000000000000000 R13=ffff888015c17928 R14=ffff888015c17928 R15=ffff888015c17d36 RIP=ffffffff814c07eb RFL=00000287 [--S--PC] 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 00007f105df41900 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=00007f0014920650 CR3=000000000c528000 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=111953fccd954b6400000000000ae988 XMM05=a8bfa205439c19aa00000000001366d0 XMM06=4fda316b135da52b0000000000135150 XMM07=fb795ef6d65770560000000000124650 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffcbb96e518 CR3=000000000dc06000 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=2035323a32333a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a32333a3132203931 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000