syzkaller login: [ 33.917226] BUG: Bad rss-counter state mm:000000000506b42b type:MM_FILEPAGES val:33 [ 33.918407] BUG: Bad rss-counter state mm:000000000506b42b type:MM_ANONPAGES val:22 [ 33.956695] ================================================================== [ 33.957747] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.958788] Read of size 8 at addr ffff88800fcc0310 by task sshd/220 [ 33.959713] [ 33.959933] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.960814] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.961815] Call Trace: [ 33.962144] [ 33.962427] dump_stack_lvl+0x91/0xf0 [ 33.962914] print_report+0xcc/0x620 [ 33.963406] ? __virt_addr_valid+0x102/0x340 [ 33.963975] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.964608] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.965230] kasan_report+0xbe/0xf0 [ 33.965701] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.966329] vma_interval_tree_remove+0xc75/0xec0 [ 33.966930] vma_prepare+0xc54/0x11a0 [ 33.967413] __split_vma+0x5af/0x950 [ 33.967893] ? __pfx___split_vma+0x10/0x10 [ 33.968426] ? find_held_lock+0x2c/0x110 [ 33.968947] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.969523] ? lock_is_held_type+0x9f/0x120 [ 33.970079] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.970690] ? mtree_range_walk+0x632/0x900 [ 33.971250] ? mas_walk+0x5c7/0x7c0 [ 33.971753] do_vmi_munmap+0x1f1/0x2b0 [ 33.972250] mmap_region+0x1f9/0x2660 [ 33.972750] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.973266] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.973978] ? __pfx_lock_acquire+0x10/0x10 [ 33.974508] ? __pfx_mmap_region+0x10/0x10 [ 33.975037] ? security_mmap_addr+0x7d/0xa0 [ 33.975575] ? get_unmapped_area+0x1f5/0x3f0 [ 33.976150] do_mmap+0x854/0xf00 [ 33.976596] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.977109] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.977683] ksys_mmap_pgoff+0x3af/0x500 [ 33.978195] do_syscall_64+0x3f/0x90 [ 33.978669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.979320] RIP: 0033:0x7f929a533d82 [ 33.979799] 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 [ 33.981924] RSP: 002b:00007ffff621fbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.982869] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f929a533d82 [ 33.983733] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f929996d000 [ 33.984581] RBP: 00007f929996d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.985424] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f3ea10dec0 [ 33.986271] R13: 00007ffff621fbf0 R14: 00007ffff621fc20 R15: 00007ffff621ff80 [ 33.987130] [ 33.987423] [ 33.987645] Allocated by task 213: [ 33.988086] kasan_save_stack+0x22/0x50 [ 33.988594] kasan_set_track+0x25/0x30 [ 33.989089] __kasan_slab_alloc+0x59/0x70 [ 33.989616] kmem_cache_alloc+0x16b/0x370 [ 33.990135] vm_area_dup+0x20/0x160 [ 33.990586] __split_vma+0x170/0x950 [ 33.991052] split_vma+0xc6/0x110 [ 33.991493] mprotect_fixup+0x8d2/0xb30 [ 33.992005] do_mprotect_pkey+0x87e/0xd40 [ 33.992523] __x64_sys_mprotect+0x78/0xc0 [ 33.993046] do_syscall_64+0x3f/0x90 [ 33.993527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.994168] [ 33.994383] Freed by task 203: [ 33.994778] kasan_save_stack+0x22/0x50 [ 33.995284] kasan_set_track+0x25/0x30 [ 33.995784] kasan_save_free_info+0x2b/0x50 [ 33.996314] __kasan_slab_free+0x10a/0x190 [ 33.996852] kmem_cache_free+0x10d/0x4d0 [ 33.997358] rcu_core+0x8c8/0x2860 [ 33.997881] __do_softirq+0x1b7/0x7d4 [ 33.998355] [ 33.998576] Last potentially related work creation: [ 33.999168] kasan_save_stack+0x22/0x50 [ 33.999698] __kasan_record_aux_stack+0x8e/0xa0 [ 34.000274] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.000911] remove_vma+0x139/0x170 [ 34.001370] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.001924] do_vmi_munmap+0x1f1/0x2b0 [ 34.002410] __vm_munmap+0x138/0x3a0 [ 34.002878] __x64_sys_munmap+0x59/0x80 [ 34.003376] do_syscall_64+0x3f/0x90 [ 34.003855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.004501] [ 34.004716] The buggy address belongs to the object at ffff88800fcc02b8 [ 34.004716] which belongs to the cache vm_area_struct of size 168 [ 34.006190] The buggy address is located 88 bytes inside of [ 34.006190] freed 168-byte region [ffff88800fcc02b8, ffff88800fcc0360) [ 34.007618] [ 34.007841] The buggy address belongs to the physical page: [ 34.008498] page:00000000dafd8c71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcc0 [ 34.009591] memcg:ffff88801a720201 [ 34.010015] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.010665] page_type: 0xffffffff() [ 34.011119] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.012044] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a720201 [ 34.012950] page dumped because: kasan: bad access detected [ 34.013610] [ 34.013824] Memory state around the buggy address: [ 34.014415] ffff88800fcc0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 34.015261] ffff88800fcc0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.016123] >ffff88800fcc0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.016972] ^ [ 34.017434] ffff88800fcc0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.018287] ffff88800fcc0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.019140] ================================================================== [ 34.020079] Disabling lock debugging due to kernel taint [ 36.157004] BUG: Bad rss-counter state mm:000000007ed4c0dc type:MM_FILEPAGES val:33 [ 36.158000] BUG: Bad rss-counter state mm:000000007ed4c0dc type:MM_ANONPAGES val:22 [ 36.649791] BUG: Bad rss-counter state mm:00000000a4b82f50 type:MM_FILEPAGES val:33 [ 36.650990] BUG: Bad rss-counter state mm:00000000a4b82f50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4982' (ECDSA) to the list of known hosts. 2023/06/20 10:33:17 fuzzer started 2023/06/20 10:33:18 dialing manager at localhost:44161 2023/06/20 10:33:18 checking machine... 2023/06/20 10:33:18 checking revisions... [ 37.272271] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:33:18 testing simple program... [ 37.323525] cgroup: Unknown subsys name 'net' [ 37.373518] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:33:13 Registers: info registers vcpu 0 RAX=000000000000000a RBX=1ffff110028f1eaf RCX=0000000000000000 RDX=0000000000000800 RSI=000000000000000a RDI=ffff88801478f598 RBP=00000000000000e8 RSP=ffff88801478f570 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888016561500 R13=0000000000000000 R14=ffff888013f4c638 R15=ffff888013f4c5f0 RIP=ffffffff82271264 RFL=00000283 [--S---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 00007fb075eea900 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=00007fb07540a020 CR3=000000000d774000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=807531cf51cdcd4000000000000ae988 XMM05=04d58ede303fdc8c0000000000134ee8 XMM06=4fda316b135da52b0000000000133cd8 XMM07=fb795ef6d65770560000000000123f90 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000705d RBX=ffffffff85d3d010 RCX=1ffffffff0ba77f5 RDX=00000000fffbf9ad RSI=0000000000000000 RDI=ffff888016b89f34 RBP=ffff88806cf3a2d8 RSP=ffff88806cf09c58 R8 =00000000fffd93d4 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff88806cf09ff8 R12=ffffffff85d3bf9c R13=ffff88806cf3a2c0 R14=1ffff1100d9e139c R15=0000000000000000 RIP=ffffffff8137cc21 RFL=00000046 [---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 00007fb588161900 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=00007ffd2dcd5000 CR3=000000000e08a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000