syzkaller login: [ 33.684660] BUG: Bad rss-counter state mm:0000000050571ea6 type:MM_FILEPAGES val:33 [ 33.686143] BUG: Bad rss-counter state mm:0000000050571ea6 type:MM_ANONPAGES val:22 [ 33.840532] ================================================================== [ 33.841626] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.842877] Read of size 8 at addr ffff88800dcbe310 by task sshd/220 [ 33.843737] [ 33.843975] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.844911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.845963] Call Trace: [ 33.846304] [ 33.846607] dump_stack_lvl+0x91/0xf0 [ 33.847157] print_report+0xcc/0x620 [ 33.847702] ? __virt_addr_valid+0x102/0x340 [ 33.848318] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.848998] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.849683] kasan_report+0xbe/0xf0 [ 33.850205] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.850914] vma_interval_tree_remove+0xc75/0xec0 [ 33.851584] vma_prepare+0xc54/0x11a0 [ 33.852114] __split_vma+0x5af/0x950 [ 33.852637] ? __pfx___split_vma+0x10/0x10 [ 33.853218] ? find_held_lock+0x2c/0x110 [ 33.853794] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.854412] ? lock_is_held_type+0x9f/0x120 [ 33.855012] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.855735] ? mtree_range_walk+0x632/0x900 [ 33.856348] ? mas_walk+0x5c7/0x7c0 [ 33.856872] do_vmi_munmap+0x1f1/0x2b0 [ 33.857418] mmap_region+0x1f9/0x2660 [ 33.857954] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.858584] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.859431] ? __pfx_lock_acquire+0x10/0x10 [ 33.860026] ? __pfx_mmap_region+0x10/0x10 [ 33.860612] ? security_mmap_addr+0x7d/0xa0 [ 33.861200] ? get_unmapped_area+0x1f5/0x3f0 [ 33.861813] do_mmap+0x854/0xf00 [ 33.862307] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.862866] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.863498] ksys_mmap_pgoff+0x3af/0x500 [ 33.864071] do_syscall_64+0x3f/0x90 [ 33.864605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.865327] RIP: 0033:0x7f4398936d82 [ 33.865841] 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 [ 33.868218] RSP: 002b:00007ffdc46edc28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.869201] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4398936d82 [ 33.870146] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4397d70000 [ 33.871119] RBP: 00007f4397d70000 R08: 0000000000000009 R09: 0000000000001000 [ 33.872065] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee61421d90 [ 33.873016] R13: 00007ffdc46edc40 R14: 00007ffdc46edc70 R15: 00007ffdc46edfd0 [ 33.873974] [ 33.874301] [ 33.874542] Allocated by task 213: [ 33.875016] kasan_save_stack+0x22/0x50 [ 33.875577] kasan_set_track+0x25/0x30 [ 33.876127] __kasan_slab_alloc+0x59/0x70 [ 33.876714] kmem_cache_alloc+0x16b/0x370 [ 33.877299] vm_area_dup+0x20/0x160 [ 33.877802] __split_vma+0x170/0x950 [ 33.878321] split_vma+0xc6/0x110 [ 33.878831] mprotect_fixup+0x8d2/0xb30 [ 33.879393] do_mprotect_pkey+0x87e/0xd40 [ 33.879975] __x64_sys_mprotect+0x78/0xc0 [ 33.880555] do_syscall_64+0x3f/0x90 [ 33.881087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.881800] [ 33.882043] Freed by task 213: [ 33.882478] kasan_save_stack+0x22/0x50 [ 33.883041] kasan_set_track+0x25/0x30 [ 33.883588] kasan_save_free_info+0x2b/0x50 [ 33.884180] __kasan_slab_free+0x10a/0x190 [ 33.884779] kmem_cache_free+0x10d/0x4d0 [ 33.885339] rcu_core+0x8c8/0x2860 [ 33.885828] __do_softirq+0x1b7/0x7d4 [ 33.886364] [ 33.886600] Last potentially related work creation: [ 33.887256] kasan_save_stack+0x22/0x50 [ 33.887812] __kasan_record_aux_stack+0x8e/0xa0 [ 33.888450] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.889178] remove_vma+0x139/0x170 [ 33.889681] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.890304] do_vmi_munmap+0x1f1/0x2b0 [ 33.890868] __vm_munmap+0x138/0x3a0 [ 33.891387] __x64_sys_munmap+0x59/0x80 [ 33.891935] do_syscall_64+0x3f/0x90 [ 33.892461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.893174] [ 33.893416] The buggy address belongs to the object at ffff88800dcbe2b8 [ 33.893416] which belongs to the cache vm_area_struct of size 168 [ 33.895061] The buggy address is located 88 bytes inside of [ 33.895061] freed 168-byte region [ffff88800dcbe2b8, ffff88800dcbe360) [ 33.896635] [ 33.896876] The buggy address belongs to the physical page: [ 33.897620] page:00000000da5a4e6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcbe [ 33.898835] memcg:ffff88801aa41801 [ 33.899317] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.900041] page_type: 0xffffffff() [ 33.900566] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.901565] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801aa41801 [ 33.902587] page dumped because: kasan: bad access detected [ 33.903346] [ 33.903583] Memory state around the buggy address: [ 33.904223] ffff88800dcbe200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.905171] ffff88800dcbe280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.906133] >ffff88800dcbe300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.907094] ^ [ 33.907621] ffff88800dcbe380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.908576] ffff88800dcbe400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.909527] ================================================================== [ 33.910751] Disabling lock debugging due to kernel taint [ 35.705598] BUG: Bad rss-counter state mm:00000000515043ff type:MM_FILEPAGES val:33 [ 35.707137] BUG: Bad rss-counter state mm:00000000515043ff type:MM_ANONPAGES val:22 [ 36.167534] BUG: Bad rss-counter state mm:00000000c3046a87 type:MM_FILEPAGES val:33 [ 36.168522] BUG: Bad rss-counter state mm:00000000c3046a87 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59895' (ECDSA) to the list of known hosts. 2023/06/20 07:02:30 fuzzer started 2023/06/20 07:02:31 dialing manager at localhost:44161 2023/06/20 07:02:31 checking machine... 2023/06/20 07:02:31 checking revisions... [ 36.895164] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:02:31 testing simple program... [ 36.950272] cgroup: Unknown subsys name 'net' [ 37.006068] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:02:27 Registers: info registers vcpu 0 RAX=0000000000001600 RBX=000056503b8fbf80 RCX=000000000000000c RDX=00000000000009c0 RSI=000000000000000a RDI=000056503b90a500 RBP=00007fff492ed2f0 RSP=00007fff492ed288 R8 =000056503b90a4f4 R9 =00007f77f4be3be0 R10=000000000000006f R11=0000000000000246 R12=00007f77f4631900 R13=00007fff492ed2f8 R14=0000000000000a4c R15=0000000000000000 RIP=00007f77f4b80a09 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f77f4631900 00000000 00000000 GS =0000 0000000000000000 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=00007f77f4be6650 CR3=000000000ee90000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=000000ff00ffff000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=20202020202020205249445f4c49414d XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=0000000000000000ffffffffffffffff XMM08=00000000000000002020200020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=00007ffc3065dbe8 CR3=0000000016ea2000 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=2030333a32303a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a32303a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000