syzkaller login: [ 33.013812] BUG: Bad rss-counter state mm:000000008e38c919 type:MM_FILEPAGES val:33 [ 33.014764] BUG: Bad rss-counter state mm:000000008e38c919 type:MM_ANONPAGES val:22 [ 33.126135] ================================================================== [ 33.126857] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.127576] Read of size 8 at addr ffff888016fc0ed8 by task sshd/220 [ 33.128238] [ 33.128392] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.128999] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.129682] Call Trace: [ 33.129904] [ 33.130289] dump_stack_lvl+0x91/0xf0 [ 33.130636] print_report+0xcc/0x620 [ 33.130981] ? __virt_addr_valid+0x102/0x340 [ 33.131367] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.131812] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.132253] kasan_report+0xbe/0xf0 [ 33.132601] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.133042] vma_interval_tree_remove+0xc75/0xec0 [ 33.133471] vma_prepare+0xc54/0x11a0 [ 33.133814] __split_vma+0x5af/0x950 [ 33.134167] ? __pfx___split_vma+0x10/0x10 [ 33.134545] ? find_held_lock+0x2c/0x110 [ 33.134916] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.135326] ? lock_is_held_type+0x9f/0x120 [ 33.135710] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.136149] ? mtree_range_walk+0x632/0x900 [ 33.136550] ? mas_walk+0x5c7/0x7c0 [ 33.136897] do_vmi_munmap+0x1f1/0x2b0 [ 33.137243] mmap_region+0x1f9/0x2660 [ 33.137586] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.137952] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.138479] ? __pfx_lock_acquire+0x10/0x10 [ 33.138857] ? __pfx_mmap_region+0x10/0x10 [ 33.139227] ? security_mmap_addr+0x7d/0xa0 [ 33.139606] ? get_unmapped_area+0x1f5/0x3f0 [ 33.140001] do_mmap+0x854/0xf00 [ 33.140321] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.140681] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.141080] ksys_mmap_pgoff+0x3af/0x500 [ 33.141441] do_syscall_64+0x3f/0x90 [ 33.141775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.142246] RIP: 0033:0x7ff30b4ffd82 [ 33.142577] 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 [ 33.144105] RSP: 002b:00007ffe2741ed68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.144750] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff30b4ffd82 [ 33.145373] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff30a939000 [ 33.145980] RBP: 00007ff30a939000 R08: 0000000000000009 R09: 0000000000001000 [ 33.146612] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564506529ec0 [ 33.147209] R13: 00007ffe2741ed80 R14: 00007ffe2741edb0 R15: 00007ffe2741f110 [ 33.147822] [ 33.148032] [ 33.148182] Allocated by task 213: [ 33.148485] kasan_save_stack+0x22/0x50 [ 33.148844] kasan_set_track+0x25/0x30 [ 33.149193] __kasan_slab_alloc+0x59/0x70 [ 33.149566] kmem_cache_alloc+0x16b/0x370 [ 33.149929] vm_area_dup+0x20/0x160 [ 33.150268] __split_vma+0x170/0x950 [ 33.150594] split_vma+0xc6/0x110 [ 33.150906] mprotect_fixup+0x8d2/0xb30 [ 33.151253] do_mprotect_pkey+0x87e/0xd40 [ 33.151626] __x64_sys_mprotect+0x78/0xc0 [ 33.152000] do_syscall_64+0x3f/0x90 [ 33.152342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.152803] [ 33.152954] Freed by task 213: [ 33.153236] kasan_save_stack+0x22/0x50 [ 33.153595] kasan_set_track+0x25/0x30 [ 33.153945] kasan_save_free_info+0x2b/0x50 [ 33.154325] __kasan_slab_free+0x10a/0x190 [ 33.154706] kmem_cache_free+0x10d/0x4d0 [ 33.155063] rcu_core+0x8c8/0x2860 [ 33.155380] __do_softirq+0x1b7/0x7d4 [ 33.155720] [ 33.155872] Last potentially related work creation: [ 33.156318] kasan_save_stack+0x22/0x50 [ 33.156675] __kasan_record_aux_stack+0x8e/0xa0 [ 33.157093] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.157544] remove_vma+0x139/0x170 [ 33.157867] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.158275] do_vmi_munmap+0x1f1/0x2b0 [ 33.158624] __vm_munmap+0x138/0x3a0 [ 33.158964] __x64_sys_munmap+0x59/0x80 [ 33.159321] do_syscall_64+0x3f/0x90 [ 33.159653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.160110] [ 33.160261] The buggy address belongs to the object at ffff888016fc0e80 [ 33.160261] which belongs to the cache vm_area_struct of size 168 [ 33.161288] The buggy address is located 88 bytes inside of [ 33.161288] freed 168-byte region [ffff888016fc0e80, ffff888016fc0f28) [ 33.162310] [ 33.162463] The buggy address belongs to the physical page: [ 33.162933] page:00000000fc0f1b64 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fc0 [ 33.163699] memcg:ffff88800c7cfb01 [ 33.164001] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.164460] page_type: 0xffffffff() [ 33.164774] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.165419] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7cfb01 [ 33.166104] page dumped because: kasan: bad access detected [ 33.166577] [ 33.166739] Memory state around the buggy address: [ 33.167150] ffff888016fc0d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.167757] ffff888016fc0e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 33.168362] >ffff888016fc0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.168982] ^ [ 33.169510] ffff888016fc0f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 33.170137] ffff888016fc0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.170736] ================================================================== [ 33.171667] Disabling lock debugging due to kernel taint [ 35.263426] BUG: Bad rss-counter state mm:00000000326fcc7b type:MM_FILEPAGES val:33 [ 35.264167] BUG: Bad rss-counter state mm:00000000326fcc7b type:MM_ANONPAGES val:22 [ 35.639988] BUG: Bad rss-counter state mm:00000000d14af077 type:MM_FILEPAGES val:33 [ 35.640771] BUG: Bad rss-counter state mm:00000000d14af077 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4709' (ECDSA) to the list of known hosts. 2023/06/20 09:11:36 fuzzer started 2023/06/20 09:11:36 dialing manager at localhost:44161 2023/06/20 09:11:36 checking machine... 2023/06/20 09:11:36 checking revisions... [ 36.257832] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:11:37 testing simple program... [ 36.295408] cgroup: Unknown subsys name 'net' [ 36.334250] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:11:34 Registers: info registers vcpu 0 RAX=ffffffff8614c813 RBX=0000000000000001 RCX=ffffffff8614c80e RDX=0000000000000000 RSI=1ffffffff0c29902 RDI=ffffffff85e0ac00 RBP=ffff88801635f8c8 RSP=ffff88801635f800 R8 =ffffffff8614c80e R9 =ffff88801635f8b0 R10=0000000000038001 R11=000000000002460b R12=ffff88801635f8d0 R13=ffff88801635f8b8 R14=ffff88801635f8b1 R15=ffff88801635f870 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 00007f076e8c8900 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=00007fff58116ff8 CR3=0000000016300000 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=563412feff00545000000000000080fe 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 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=00007fa266b6f250 CR3=0000000016dda000 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=2036333a31313a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a31313a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000