syzkaller login: [ 28.692985] BUG: Bad rss-counter state mm:00000000d0729802 type:MM_FILEPAGES val:33 [ 28.694999] BUG: Bad rss-counter state mm:00000000d0729802 type:MM_ANONPAGES val:22 [ 28.717086] sshd (219) used greatest stack depth: 24128 bytes left [ 28.879745] ================================================================== [ 28.880668] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.881616] Read of size 8 at addr ffff888006917968 by task sshd/222 [ 28.882484] [ 28.882724] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.883615] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.884600] Call Trace: [ 28.884929] [ 28.885221] dump_stack_lvl+0x91/0xf0 [ 28.885716] print_report+0xcc/0x620 [ 28.886212] ? __virt_addr_valid+0x102/0x340 [ 28.886772] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.887414] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.888049] kasan_report+0xbe/0xf0 [ 28.888543] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889174] vma_interval_tree_remove+0xc75/0xec0 [ 28.889787] vma_prepare+0xc54/0x11a0 [ 28.890273] __split_vma+0x5af/0x950 [ 28.890755] ? __pfx___split_vma+0x10/0x10 [ 28.891317] ? find_held_lock+0x2c/0x110 [ 28.891845] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.892416] ? lock_is_held_type+0x9f/0x120 [ 28.892965] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.893583] ? mtree_range_walk+0x632/0x900 [ 28.894138] ? mas_walk+0x5c7/0x7c0 [ 28.894624] do_vmi_munmap+0x1f1/0x2b0 [ 28.895129] mmap_region+0x1f9/0x2660 [ 28.895619] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.896138] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.896876] ? __pfx_lock_acquire+0x10/0x10 [ 28.897436] ? __pfx_mmap_region+0x10/0x10 [ 28.897965] ? security_mmap_addr+0x7d/0xa0 [ 28.898494] ? get_unmapped_area+0x1f5/0x3f0 [ 28.899083] do_mmap+0x854/0xf00 [ 28.899528] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.900035] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.900604] ksys_mmap_pgoff+0x3af/0x500 [ 28.901119] do_syscall_64+0x3f/0x90 [ 28.901629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.902311] RIP: 0033:0x7f5321253d82 [ 28.902799] 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 [ 28.904975] RSP: 002b:00007fff7bc7f868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.905884] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5321253d82 [ 28.906727] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f532068d000 [ 28.907586] RBP: 00007f532068d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.908432] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d410f9ec0 [ 28.909280] R13: 00007fff7bc7f880 R14: 00007fff7bc7f8b0 R15: 00007fff7bc7fc10 [ 28.910140] [ 28.910432] [ 28.910645] Allocated by task 213: [ 28.911111] kasan_save_stack+0x22/0x50 [ 28.911636] kasan_set_track+0x25/0x30 [ 28.912130] __kasan_slab_alloc+0x59/0x70 [ 28.912664] kmem_cache_alloc+0x16b/0x370 [ 28.913192] vm_area_dup+0x20/0x160 [ 28.913653] __split_vma+0x170/0x950 [ 28.914138] split_vma+0xc6/0x110 [ 28.914582] mprotect_fixup+0x8d2/0xb30 [ 28.915111] do_mprotect_pkey+0x87e/0xd40 [ 28.915640] __x64_sys_mprotect+0x78/0xc0 [ 28.916165] do_syscall_64+0x3f/0x90 [ 28.916650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.917301] [ 28.917524] Freed by task 213: [ 28.917929] kasan_save_stack+0x22/0x50 [ 28.918438] kasan_set_track+0x25/0x30 [ 28.918956] kasan_save_free_info+0x2b/0x50 [ 28.919509] __kasan_slab_free+0x10a/0x190 [ 28.920047] kmem_cache_free+0x10d/0x4d0 [ 28.920578] rcu_core+0x8c8/0x2860 [ 28.921033] __do_softirq+0x1b7/0x7d4 [ 28.921521] [ 28.921744] Last potentially related work creation: [ 28.922356] kasan_save_stack+0x22/0x50 [ 28.922864] __kasan_record_aux_stack+0x8e/0xa0 [ 28.923522] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.924191] remove_vma+0x139/0x170 [ 28.924643] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.925205] do_vmi_munmap+0x1f1/0x2b0 [ 28.925689] __vm_munmap+0x138/0x3a0 [ 28.926158] __x64_sys_munmap+0x59/0x80 [ 28.926652] do_syscall_64+0x3f/0x90 [ 28.927185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.927925] [ 28.928145] Second to last potentially related work creation: [ 28.928822] kasan_save_stack+0x22/0x50 [ 28.929320] __kasan_record_aux_stack+0x8e/0xa0 [ 28.929899] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.930539] remove_vma+0x139/0x170 [ 28.930994] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.931557] do_vmi_munmap+0x1f1/0x2b0 [ 28.932044] mmap_region+0x1f9/0x2660 [ 28.932520] do_mmap+0x854/0xf00 [ 28.932951] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.933445] ksys_mmap_pgoff+0x3af/0x500 [ 28.933953] do_syscall_64+0x3f/0x90 [ 28.934436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.935104] [ 28.935322] The buggy address belongs to the object at ffff888006917910 [ 28.935322] which belongs to the cache vm_area_struct of size 168 [ 28.936790] The buggy address is located 88 bytes inside of [ 28.936790] freed 168-byte region [ffff888006917910, ffff8880069179b8) [ 28.938183] [ 28.938399] The buggy address belongs to the physical page: [ 28.939080] page:00000000677f360e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6917 [ 28.940155] memcg:ffff88800c6eb801 [ 28.940577] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.941269] page_type: 0xffffffff() [ 28.941715] raw: 0100000000000200 ffff8880087a0c80 ffffea0000356a40 dead000000000007 [ 28.942641] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6eb801 [ 28.943563] page dumped because: kasan: bad access detected [ 28.944220] [ 28.944436] Memory state around the buggy address: [ 28.945014] ffff888006917800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.945861] ffff888006917880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.946717] >ffff888006917900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.947593] ^ [ 28.948407] ffff888006917980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 28.949267] ffff888006917a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.950122] ================================================================== [ 28.951077] Disabling lock debugging due to kernel taint [ 30.953333] BUG: Bad rss-counter state mm:000000002d19da5c type:MM_FILEPAGES val:33 [ 30.954442] BUG: Bad rss-counter state mm:000000002d19da5c type:MM_ANONPAGES val:22 [ 31.363219] BUG: Bad rss-counter state mm:0000000000a9e79d type:MM_FILEPAGES val:33 [ 31.364205] BUG: Bad rss-counter state mm:0000000000a9e79d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23653' (ECDSA) to the list of known hosts. 2023/06/20 20:03:28 fuzzer started 2023/06/20 20:03:28 dialing manager at localhost:36067 2023/06/20 20:03:29 checking machine... 2023/06/20 20:03:29 checking revisions... [ 32.059577] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:03:29 testing simple program... [ 32.096232] cgroup: Unknown subsys name 'net' [ 32.141043] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:03:28 Registers: info registers vcpu 0 RAX=1ffffffff0bbfc03 RBX=ffffffff85dfe018 RCX=ffffffff8180c6a1 RDX=0000000000000000 RSI=ffffffff86138e62 RDI=ffffffff85dfe000 RBP=ffffffff85dfe000 RSP=ffff88801a08f898 R8 =ffffffff86138e62 R9 =ffff88801a08f990 R10=0000000000038001 R11=0000000000020d8f R12=ffffffff85dfe034 R13=ffffffff85dfe000 R14=ffffffff85dfe000 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f3d9377e900 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=00007f3d93d33650 CR3=000000000eab2000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f2b459761f0 CR3=000000000d656000 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=938bc435f20f6bbf9e423308fc0dbe63 XMM02=ec2efd57dc4c00df000000000011a900 XMM03=8c3156dd8808ce54000000000011a9d0 XMM04=2704860500333c2100000000000ae988 XMM05=e4cb8bb95a7664b60000000000133240 XMM06=c291bd5c70af25b900000000001330c8 XMM07=e042d86d42eb936e0000000000121998 XMM08=8c3156dd8808ce54000000000011a9d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000