syzkaller login: [ 34.180704] BUG: Bad rss-counter state mm:00000000ba825dbf type:MM_FILEPAGES val:33 [ 34.182268] BUG: Bad rss-counter state mm:00000000ba825dbf type:MM_ANONPAGES val:22 [ 34.336274] ================================================================== [ 34.337349] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.338478] Read of size 8 at addr ffff888008da7798 by task sshd/221 [ 34.339546] [ 34.339803] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.340855] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.342061] Call Trace: [ 34.342462] [ 34.342809] dump_stack_lvl+0x91/0xf0 [ 34.343387] print_report+0xcc/0x620 [ 34.343976] ? __virt_addr_valid+0x102/0x340 [ 34.344642] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.345388] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.346152] kasan_report+0xbe/0xf0 [ 34.346733] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.347479] vma_interval_tree_remove+0xc75/0xec0 [ 34.348217] vma_prepare+0xc54/0x11a0 [ 34.348795] __split_vma+0x5af/0x950 [ 34.349367] ? __pfx___split_vma+0x10/0x10 [ 34.350013] ? find_held_lock+0x2c/0x110 [ 34.350668] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.351359] ? lock_is_held_type+0x9f/0x120 [ 34.352006] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.352748] ? mtree_range_walk+0x632/0x900 [ 34.353419] ? mas_walk+0x5c7/0x7c0 [ 34.353994] do_vmi_munmap+0x1f1/0x2b0 [ 34.354602] mmap_region+0x1f9/0x2660 [ 34.355189] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.355809] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.356675] ? __pfx_lock_acquire+0x10/0x10 [ 34.357332] ? __pfx_mmap_region+0x10/0x10 [ 34.357979] ? security_mmap_addr+0x7d/0xa0 [ 34.358653] ? get_unmapped_area+0x1f5/0x3f0 [ 34.359316] do_mmap+0x854/0xf00 [ 34.359847] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.360442] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.361127] ksys_mmap_pgoff+0x3af/0x500 [ 34.361748] do_syscall_64+0x3f/0x90 [ 34.362323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.363130] RIP: 0033:0x7fec1d369d82 [ 34.363617] 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 [ 34.365599] RSP: 002b:00007fff7bfd1de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.366458] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec1d369d82 [ 34.367254] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec1c7a3000 [ 34.368052] RBP: 00007fec1c7a3000 R08: 0000000000000009 R09: 0000000000001000 [ 34.368847] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564b43e8f70 [ 34.369643] R13: 00007fff7bfd1e00 R14: 00007fff7bfd1e30 R15: 00007fff7bfd2190 [ 34.370458] [ 34.370738] [ 34.370946] Allocated by task 214: [ 34.371365] kasan_save_stack+0x22/0x50 [ 34.371867] kasan_set_track+0x25/0x30 [ 34.372351] __kasan_slab_alloc+0x59/0x70 [ 34.372869] kmem_cache_alloc+0x16b/0x370 [ 34.373382] vm_area_dup+0x20/0x160 [ 34.373836] __split_vma+0x170/0x950 [ 34.374322] split_vma+0xc6/0x110 [ 34.374788] mprotect_fixup+0x8d2/0xb30 [ 34.375287] do_mprotect_pkey+0x87e/0xd40 [ 34.375816] __x64_sys_mprotect+0x78/0xc0 [ 34.376339] do_syscall_64+0x3f/0x90 [ 34.376811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.377458] [ 34.377672] Freed by task 214: [ 34.378065] kasan_save_stack+0x22/0x50 [ 34.378587] kasan_set_track+0x25/0x30 [ 34.379078] kasan_save_free_info+0x2b/0x50 [ 34.379620] __kasan_slab_free+0x10a/0x190 [ 34.380229] kmem_cache_free+0x10d/0x4d0 [ 34.380740] rcu_core+0x8c8/0x2860 [ 34.381181] __do_softirq+0x1b7/0x7d4 [ 34.381661] [ 34.381878] Last potentially related work creation: [ 34.382514] kasan_save_stack+0x22/0x50 [ 34.383031] __kasan_record_aux_stack+0x8e/0xa0 [ 34.383605] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.384268] remove_vma+0x139/0x170 [ 34.384722] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.385282] do_vmi_munmap+0x1f1/0x2b0 [ 34.385766] __vm_munmap+0x138/0x3a0 [ 34.386228] __x64_sys_munmap+0x59/0x80 [ 34.386740] do_syscall_64+0x3f/0x90 [ 34.387213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.387865] [ 34.388082] The buggy address belongs to the object at ffff888008da7740 [ 34.388082] which belongs to the cache vm_area_struct of size 168 [ 34.389559] The buggy address is located 88 bytes inside of [ 34.389559] freed 168-byte region [ffff888008da7740, ffff888008da77e8) [ 34.390972] [ 34.391188] The buggy address belongs to the physical page: [ 34.391860] page:0000000006999726 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8da7 [ 34.392913] memcg:ffff888015d66301 [ 34.393350] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.393994] page_type: 0xffffffff() [ 34.394454] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.395371] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d66301 [ 34.396279] page dumped because: kasan: bad access detected [ 34.396942] [ 34.397162] Memory state around the buggy address: [ 34.397737] ffff888008da7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.398588] ffff888008da7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.399453] >ffff888008da7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.400332] ^ [ 34.400867] ffff888008da7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.401753] ffff888008da7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.402651] ================================================================== [ 34.403555] Disabling lock debugging due to kernel taint [ 36.581442] BUG: Bad rss-counter state mm:0000000002054a8b type:MM_FILEPAGES val:33 [ 36.582634] BUG: Bad rss-counter state mm:0000000002054a8b type:MM_ANONPAGES val:22 [ 36.973153] BUG: Bad rss-counter state mm:000000003cf9b3ba type:MM_FILEPAGES val:33 [ 36.974640] BUG: Bad rss-counter state mm:000000003cf9b3ba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45506' (ECDSA) to the list of known hosts. 2023/06/19 14:28:05 fuzzer started 2023/06/19 14:28:05 dialing manager at localhost:44161 2023/06/19 14:28:05 checking machine... 2023/06/19 14:28:05 checking revisions... [ 37.700561] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:28:05 testing simple program... [ 37.756072] cgroup: Unknown subsys name 'net' [ 37.844104] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:28:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ebb0680 RCX=0000000000000000 RDX=1ffff11001d760d0 RSI=ffffffff81f7818d RDI=ffff88800ebb0680 RBP=ffff88800fd2d000 RSP=ffff888009a97cb0 R8 =000000007b0965a2 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000dc0 R13=0000000000000dc0 R14=0000000000000010 R15=ffff88800fd2d000 RIP=ffffffff81f05eac 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 00007f9698976900 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=00007f9698f2e0b0 CR3=000000000cbb8000 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=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 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=00007f882da3e770 CR3=000000000c6c6000 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=bbf9701ef94a43b65a44c4bce74b8ccf XMM02=ec2efd57dc4c00df000000000011d938 XMM03=7b805531950c8341000000000011da08 XMM04=14515af5dacab6c800000000000ae988 XMM05=e4cb8bb95a7664b60000000000134258 XMM06=983240b4b613734300000000001330c0 XMM07=e042d86d42eb936e0000000000124950 XMM08=7b805531950c8341000000000011da08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000