syzkaller login: [ 38.743251] BUG: Bad rss-counter state mm:000000008e24bdde type:MM_FILEPAGES val:33 [ 38.745042] BUG: Bad rss-counter state mm:000000008e24bdde type:MM_ANONPAGES val:22 [ 38.905669] ================================================================== [ 38.906711] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.907815] Read of size 8 at addr ffff88800e1633f8 by task sshd/219 [ 38.908834] [ 38.909078] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.910069] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.911192] Call Trace: [ 38.911566] [ 38.911897] dump_stack_lvl+0x91/0xf0 [ 38.912515] print_report+0xcc/0x620 [ 38.913081] ? __virt_addr_valid+0x102/0x340 [ 38.913741] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.914471] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.915207] kasan_report+0xbe/0xf0 [ 38.915782] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.916531] vma_interval_tree_remove+0xc75/0xec0 [ 38.917188] vma_prepare+0xc54/0x11a0 [ 38.917716] __split_vma+0x5af/0x950 [ 38.918229] ? __pfx___split_vma+0x10/0x10 [ 38.918843] ? find_held_lock+0x2c/0x110 [ 38.919567] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.920303] ? lock_is_held_type+0x9f/0x120 [ 38.920898] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.921584] ? mtree_range_walk+0x632/0x900 [ 38.922183] ? mas_walk+0x5c7/0x7c0 [ 38.922726] do_vmi_munmap+0x1f1/0x2b0 [ 38.923259] mmap_region+0x1f9/0x2660 [ 38.923796] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.924368] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.925153] ? __pfx_lock_acquire+0x10/0x10 [ 38.925748] ? __pfx_mmap_region+0x10/0x10 [ 38.926324] ? security_mmap_addr+0x7d/0xa0 [ 38.926923] ? get_unmapped_area+0x1f5/0x3f0 [ 38.927535] do_mmap+0x854/0xf00 [ 38.928022] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.928572] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.929182] ksys_mmap_pgoff+0x3af/0x500 [ 38.929746] do_syscall_64+0x3f/0x90 [ 38.930269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930993] RIP: 0033:0x7f0ee1a6cd82 [ 38.931509] 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 [ 38.933857] RSP: 002b:00007ffca82347d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.934854] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ee1a6cd82 [ 38.935780] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ee0ea6000 [ 38.936742] RBP: 00007f0ee0ea6000 R08: 0000000000000009 R09: 0000000000001000 [ 38.937741] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cacc475b20 [ 38.938772] R13: 00007ffca82347f0 R14: 00007ffca8234820 R15: 00007ffca8234b80 [ 38.939784] [ 38.940141] [ 38.940388] Allocated by task 212: [ 38.940894] kasan_save_stack+0x22/0x50 [ 38.941500] kasan_set_track+0x25/0x30 [ 38.942074] __kasan_slab_alloc+0x59/0x70 [ 38.942725] kmem_cache_alloc+0x16b/0x370 [ 38.943333] vm_area_dup+0x20/0x160 [ 38.943971] __split_vma+0x170/0x950 [ 38.944632] split_vma+0xc6/0x110 [ 38.945233] mprotect_fixup+0x8d2/0xb30 [ 38.945918] do_mprotect_pkey+0x87e/0xd40 [ 38.946636] __x64_sys_mprotect+0x78/0xc0 [ 38.947341] do_syscall_64+0x3f/0x90 [ 38.947993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.948863] [ 38.949149] Freed by task 212: [ 38.949743] kasan_save_stack+0x22/0x50 [ 38.950432] kasan_set_track+0x25/0x30 [ 38.951097] kasan_save_free_info+0x2b/0x50 [ 38.951824] __kasan_slab_free+0x10a/0x190 [ 38.952581] kmem_cache_free+0x10d/0x4d0 [ 38.953265] rcu_core+0x8c8/0x2860 [ 38.953865] __do_softirq+0x1b7/0x7d4 [ 38.954504] [ 38.954791] Last potentially related work creation: [ 38.955580] kasan_save_stack+0x22/0x50 [ 38.956259] __kasan_record_aux_stack+0x8e/0xa0 [ 38.957019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.957832] remove_vma+0x139/0x170 [ 38.958403] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.959105] do_vmi_munmap+0x1f1/0x2b0 [ 38.959711] __vm_munmap+0x138/0x3a0 [ 38.960310] __x64_sys_munmap+0x59/0x80 [ 38.960936] do_syscall_64+0x3f/0x90 [ 38.961530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.962346] [ 38.962611] The buggy address belongs to the object at ffff88800e1633a0 [ 38.962611] which belongs to the cache vm_area_struct of size 168 [ 38.964514] The buggy address is located 88 bytes inside of [ 38.964514] freed 168-byte region [ffff88800e1633a0, ffff88800e163448) [ 38.966339] [ 38.966604] The buggy address belongs to the physical page: [ 38.967447] page:0000000027319c6e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe163 [ 38.968849] memcg:ffff88800e39eb01 [ 38.969408] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.970240] page_type: 0xffffffff() [ 38.970723] raw: 0100000000000200 ffff8880087a0c80 ffffea00005be900 dead000000000003 [ 38.971752] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e39eb01 [ 38.972911] page dumped because: kasan: bad access detected [ 38.973768] [ 38.974038] Memory state around the buggy address: [ 38.974777] ffff88800e163280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.975861] ffff88800e163300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.976782] >ffff88800e163380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.977720] ^ [ 38.978645] ffff88800e163400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.979564] ffff88800e163480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.980552] ================================================================== [ 38.981639] Disabling lock debugging due to kernel taint [ 41.965048] BUG: Bad rss-counter state mm:00000000513f3ac7 type:MM_FILEPAGES val:33 [ 41.966032] BUG: Bad rss-counter state mm:00000000513f3ac7 type:MM_ANONPAGES val:22 [ 42.573119] BUG: Bad rss-counter state mm:00000000497b4a25 type:MM_FILEPAGES val:33 [ 42.574319] BUG: Bad rss-counter state mm:00000000497b4a25 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35896' (ECDSA) to the list of known hosts. 2023/06/21 01:34:53 fuzzer started 2023/06/21 01:34:53 dialing manager at localhost:36067 2023/06/21 01:34:53 checking machine... 2023/06/21 01:34:53 checking revisions... [ 43.221530] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:34:54 testing simple program... [ 43.269486] cgroup: Unknown subsys name 'net' [ 43.312230] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:34:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801adb0150 RCX=ffffffff812e0126 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88801adb0150 RBP=1ffff110011aff49 RSP=ffff888008d7fa38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff88801adb0158 R13=ffff88801adb0160 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8180f027 RFL=00000002 [-------] 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 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=00005588ee7a9fe0 CR3=0000000005482000 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=ffffffff000000000000000000000000 XMM02=ffffffff000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007faab0a54c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000726f7475636578652d7a7973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000a RBX=000000000000000a RCX=0000000000000000 RDX=00000000000101f4 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800f3d81a0 RSP=ffff88801029f7a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f4 R11=0000000000000128 R12=00000000000101f4 R13=ffff88800f3d8050 R14=ffff88800f3d8048 R15=ffff88800f3d8060 RIP=ffffffff82191d9e RFL=00000093 [--S-A-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 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=00007fdf45143168 CR3=000000000cba6000 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=e3ea7d2d010c61a82941ceac7bda81d6 XMM02=000000000011bdb8d59e07bde36eea69 XMM03=000000000011bee0ec2efd57dc4c00df XMM04=11167d347a0e12a200000000000ae988 XMM05=5ea5fee6857b8b180000000000133130 XMM06=dfcdbad4f1609c370000000000131c78 XMM07=fb795ef6d657705600000000001220e8 XMM08=2c67c8bc2e329bc3000000000011bee0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000