syzkaller login: [ 28.786033] BUG: Bad rss-counter state mm:000000000dec2f57 type:MM_FILEPAGES val:33 [ 28.787431] BUG: Bad rss-counter state mm:000000000dec2f57 type:MM_ANONPAGES val:22 [ 28.911931] ================================================================== [ 28.912871] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.913804] Read of size 8 at addr ffff88800dbf9968 by task sshd/220 [ 28.914568] [ 28.914791] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.915745] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.916749] Call Trace: [ 28.917074] [ 28.917378] dump_stack_lvl+0x91/0xf0 [ 28.917869] print_report+0xcc/0x620 [ 28.918365] ? __virt_addr_valid+0x102/0x340 [ 28.918923] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.919550] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.920165] kasan_report+0xbe/0xf0 [ 28.920669] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.921294] vma_interval_tree_remove+0xc75/0xec0 [ 28.921900] vma_prepare+0xc54/0x11a0 [ 28.922385] __split_vma+0x5af/0x950 [ 28.922858] ? __pfx___split_vma+0x10/0x10 [ 28.923392] ? find_held_lock+0x2c/0x110 [ 28.923918] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.924496] ? lock_is_held_type+0x9f/0x120 [ 28.925036] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.925651] ? mtree_range_walk+0x632/0x900 [ 28.926205] ? mas_walk+0x5c7/0x7c0 [ 28.926682] do_vmi_munmap+0x1f1/0x2b0 [ 28.927175] mmap_region+0x1f9/0x2660 [ 28.927662] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.928176] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.928908] ? __pfx_lock_acquire+0x10/0x10 [ 28.929449] ? __pfx_mmap_region+0x10/0x10 [ 28.929981] ? security_mmap_addr+0x7d/0xa0 [ 28.930519] ? get_unmapped_area+0x1f5/0x3f0 [ 28.931076] do_mmap+0x854/0xf00 [ 28.931515] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.932015] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.932586] ksys_mmap_pgoff+0x3af/0x500 [ 28.933103] do_syscall_64+0x3f/0x90 [ 28.933583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.934235] RIP: 0033:0x7facb6c06d82 [ 28.934693] 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 [ 28.936833] RSP: 002b:00007ffdf3d65278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.937737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007facb6c06d82 [ 28.938595] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007facb6040000 [ 28.939448] RBP: 00007facb6040000 R08: 0000000000000009 R09: 0000000000001000 [ 28.940298] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e67a4e0ec0 [ 28.941148] R13: 00007ffdf3d65290 R14: 00007ffdf3d652c0 R15: 00007ffdf3d65620 [ 28.942002] [ 28.942295] [ 28.942515] Allocated by task 212: [ 28.942944] kasan_save_stack+0x22/0x50 [ 28.943455] kasan_set_track+0x25/0x30 [ 28.943949] __kasan_slab_alloc+0x59/0x70 [ 28.944475] kmem_cache_alloc+0x16b/0x370 [ 28.945000] vm_area_dup+0x20/0x160 [ 28.945466] __split_vma+0x170/0x950 [ 28.945932] split_vma+0xc6/0x110 [ 28.946376] mprotect_fixup+0x8d2/0xb30 [ 28.946878] do_mprotect_pkey+0x87e/0xd40 [ 28.947403] __x64_sys_mprotect+0x78/0xc0 [ 28.947927] do_syscall_64+0x3f/0x90 [ 28.948408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.949075] [ 28.949291] Freed by task 212: [ 28.949682] kasan_save_stack+0x22/0x50 [ 28.950183] kasan_set_track+0x25/0x30 [ 28.950675] kasan_save_free_info+0x2b/0x50 [ 28.951211] __kasan_slab_free+0x10a/0x190 [ 28.951742] kmem_cache_free+0x10d/0x4d0 [ 28.952251] rcu_core+0x8c8/0x2860 [ 28.952718] __do_softirq+0x1b7/0x7d4 [ 28.953194] [ 28.953410] Last potentially related work creation: [ 28.954002] kasan_save_stack+0x22/0x50 [ 28.954506] __kasan_record_aux_stack+0x8e/0xa0 [ 28.955087] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.955729] remove_vma+0x139/0x170 [ 28.956183] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.956741] do_vmi_munmap+0x1f1/0x2b0 [ 28.957227] __vm_munmap+0x138/0x3a0 [ 28.957688] __x64_sys_munmap+0x59/0x80 [ 28.958186] do_syscall_64+0x3f/0x90 [ 28.958659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.959307] [ 28.959524] The buggy address belongs to the object at ffff88800dbf9910 [ 28.959524] which belongs to the cache vm_area_struct of size 168 [ 28.961006] The buggy address is located 88 bytes inside of [ 28.961006] freed 168-byte region [ffff88800dbf9910, ffff88800dbf99b8) [ 28.962424] [ 28.962644] The buggy address belongs to the physical page: [ 28.963309] page:000000001022ed8a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbf9 [ 28.964398] memcg:ffff88800977ff01 [ 28.964836] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.965541] page_type: 0xffffffff() [ 28.965992] raw: 0100000000000200 ffff8880087a0c80 ffffea000036b540 dead000000000003 [ 28.966911] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800977ff01 [ 28.967824] page dumped because: kasan: bad access detected [ 28.968494] [ 28.968714] Memory state around the buggy address: [ 28.969291] ffff88800dbf9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.970142] ffff88800dbf9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.970997] >ffff88800dbf9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.971860] ^ [ 28.972655] ffff88800dbf9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 28.973526] ffff88800dbf9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.974373] ================================================================== [ 28.975354] Disabling lock debugging due to kernel taint [ 31.071689] BUG: Bad rss-counter state mm:000000009c1c9a2a type:MM_FILEPAGES val:33 [ 31.072870] BUG: Bad rss-counter state mm:000000009c1c9a2a type:MM_ANONPAGES val:22 [ 31.473995] BUG: Bad rss-counter state mm:00000000c1b06aca type:MM_FILEPAGES val:33 [ 31.475660] BUG: Bad rss-counter state mm:00000000c1b06aca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47150' (ECDSA) to the list of known hosts. 2023/06/21 03:14:33 fuzzer started 2023/06/21 03:14:33 dialing manager at localhost:36067 2023/06/21 03:14:33 checking machine... 2023/06/21 03:14:33 checking revisions... [ 32.193701] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:14:33 testing simple program... [ 32.240715] cgroup: Unknown subsys name 'net' [ 32.291917] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:14:33 Registers: info registers vcpu 0 RAX=000000002a9705d6 RBX=00000000c6bae7d8 RCX=ffff888016af79c4 RDX=0000000000000012 RSI=0000000000000003 RDI=0000000094216f92 RBP=ffff88800844f780 RSP=ffff888016af78d8 R8 =0000000050ca3efd R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff888016af7940 R15=0000000000000012 RIP=ffffffff82270457 RFL=00000a03 [-O----C] 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 00007fcaac40e900 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=00007fcaac9c3650 CR3=000000000cbca000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000423c4378 RCX=ffff88806ca21bc0 RDX=0000000000000007 RSI=0000000000000002 RDI=0000000038bc3e35 RBP=ffff88800ebd4440 RSP=ffff88806cf09b20 R8 =000000007041ce1b R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf09b88 R15=0000000000000007 RIP=ffffffff822704d3 RFL=00000206 [-----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=00007fe5e1582098 CR3=000000000b3b4000 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=6b0252af91cd1cbd6b45aed1c3de4be3 XMM02=2c67c8bc2e329bc3000000000011cff0 XMM03=fb795ef6d65770560000000000120f68 XMM04=25b7e0ee54e90f4800000000000ae988 XMM05=9c84ec2f4c1442a60000000000132338 XMM06=4fda316b135da52b00000000001313d8 XMM07=e042d86d42eb936e00000000001211e8 XMM08=bc397ce411bf56fa000000000011d050 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000