syzkaller login: [ 30.678336] BUG: Bad rss-counter state mm:000000007163395f type:MM_FILEPAGES val:33 [ 30.679690] BUG: Bad rss-counter state mm:000000007163395f type:MM_ANONPAGES val:22 [ 30.720830] ================================================================== [ 30.721707] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.722641] Read of size 8 at addr ffff88800e420a50 by task sshd/218 [ 30.723403] [ 30.723624] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.724679] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.725639] Call Trace: [ 30.725954] [ 30.726236] dump_stack_lvl+0x91/0xf0 [ 30.726735] print_report+0xcc/0x620 [ 30.727211] ? __virt_addr_valid+0x102/0x340 [ 30.727769] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.728380] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.728989] kasan_report+0xbe/0xf0 [ 30.729461] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.730077] vma_interval_tree_remove+0xc75/0xec0 [ 30.730677] vma_prepare+0xc54/0x11a0 [ 30.731151] __split_vma+0x5af/0x950 [ 30.731611] ? __pfx___split_vma+0x10/0x10 [ 30.732148] ? find_held_lock+0x2c/0x110 [ 30.732667] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.733234] ? lock_is_held_type+0x9f/0x120 [ 30.733762] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.734368] ? mtree_range_walk+0x632/0x900 [ 30.734923] ? mas_walk+0x5c7/0x7c0 [ 30.735402] do_vmi_munmap+0x1f1/0x2b0 [ 30.735908] mmap_region+0x1f9/0x2660 [ 30.736384] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.736906] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.737647] ? __pfx_lock_acquire+0x10/0x10 [ 30.738187] ? __pfx_mmap_region+0x10/0x10 [ 30.738745] ? security_mmap_addr+0x7d/0xa0 [ 30.739313] ? get_unmapped_area+0x1f5/0x3f0 [ 30.739903] do_mmap+0x854/0xf00 [ 30.740373] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.740888] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.741476] ksys_mmap_pgoff+0x3af/0x500 [ 30.741994] do_syscall_64+0x3f/0x90 [ 30.742499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.743178] RIP: 0033:0x7f788001fd82 [ 30.743650] 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 [ 30.745829] RSP: 002b:00007ffd922cae68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.746723] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f788001fd82 [ 30.747586] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f787f459000 [ 30.748470] RBP: 00007f787f459000 R08: 0000000000000009 R09: 0000000000001000 [ 30.749375] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594d84deec0 [ 30.750241] R13: 00007ffd922cae80 R14: 00007ffd922caeb0 R15: 00007ffd922cb210 [ 30.751115] [ 30.751410] [ 30.751625] Allocated by task 211: [ 30.752071] kasan_save_stack+0x22/0x50 [ 30.752588] kasan_set_track+0x25/0x30 [ 30.753099] __kasan_slab_alloc+0x59/0x70 [ 30.753642] kmem_cache_alloc+0x16b/0x370 [ 30.754178] vm_area_dup+0x20/0x160 [ 30.754645] __split_vma+0x170/0x950 [ 30.755135] split_vma+0xc6/0x110 [ 30.755586] mprotect_fixup+0x8d2/0xb30 [ 30.756114] do_mprotect_pkey+0x87e/0xd40 [ 30.756651] __x64_sys_mprotect+0x78/0xc0 [ 30.757176] do_syscall_64+0x3f/0x90 [ 30.757669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.758334] [ 30.758549] Freed by task 211: [ 30.758937] kasan_save_stack+0x22/0x50 [ 30.759446] kasan_set_track+0x25/0x30 [ 30.759950] kasan_save_free_info+0x2b/0x50 [ 30.760502] __kasan_slab_free+0x10a/0x190 [ 30.761042] kmem_cache_free+0x10d/0x4d0 [ 30.761559] rcu_core+0x8c8/0x2860 [ 30.762002] __do_softirq+0x1b7/0x7d4 [ 30.762474] [ 30.762689] Last potentially related work creation: [ 30.763273] kasan_save_stack+0x22/0x50 [ 30.763796] __kasan_record_aux_stack+0x8e/0xa0 [ 30.764368] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.765003] remove_vma+0x139/0x170 [ 30.765450] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.766009] do_vmi_munmap+0x1f1/0x2b0 [ 30.766500] __vm_munmap+0x138/0x3a0 [ 30.766961] __x64_sys_munmap+0x59/0x80 [ 30.767471] do_syscall_64+0x3f/0x90 [ 30.767954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.768589] [ 30.768804] Second to last potentially related work creation: [ 30.769484] kasan_save_stack+0x22/0x50 [ 30.769980] __kasan_record_aux_stack+0x8e/0xa0 [ 30.770566] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.771208] remove_vma+0x139/0x170 [ 30.771652] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.772221] do_vmi_munmap+0x1f1/0x2b0 [ 30.772698] mmap_region+0x1f9/0x2660 [ 30.773170] do_mmap+0x854/0xf00 [ 30.773596] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.774082] ksys_mmap_pgoff+0x3af/0x500 [ 30.774583] do_syscall_64+0x3f/0x90 [ 30.775054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775700] [ 30.775923] The buggy address belongs to the object at ffff88800e4209f8 [ 30.775923] which belongs to the cache vm_area_struct of size 168 [ 30.777374] The buggy address is located 88 bytes inside of [ 30.777374] freed 168-byte region [ffff88800e4209f8, ffff88800e420aa0) [ 30.778763] [ 30.778976] The buggy address belongs to the physical page: [ 30.779636] page:00000000870e3967 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe420 [ 30.780707] memcg:ffff88800ebb8801 [ 30.781131] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.781821] page_type: 0xffffffff() [ 30.782269] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.783181] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebb8801 [ 30.784096] page dumped because: kasan: bad access detected [ 30.784763] [ 30.784983] Memory state around the buggy address: [ 30.785570] ffff88800e420900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.786450] ffff88800e420980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.787326] >ffff88800e420a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.788210] ^ [ 30.788913] ffff88800e420a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.789777] ffff88800e420b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.790637] ================================================================== [ 30.791786] Disabling lock debugging due to kernel taint [ 32.956644] BUG: Bad rss-counter state mm:0000000073af066b type:MM_FILEPAGES val:33 [ 32.957641] BUG: Bad rss-counter state mm:0000000073af066b type:MM_ANONPAGES val:22 [ 33.340333] BUG: Bad rss-counter state mm:00000000ca9ef7d8 type:MM_FILEPAGES val:33 [ 33.341330] BUG: Bad rss-counter state mm:00000000ca9ef7d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38067' (ECDSA) to the list of known hosts. 2023/06/20 13:11:45 fuzzer started 2023/06/20 13:11:45 dialing manager at localhost:36067 2023/06/20 13:11:45 checking machine... 2023/06/20 13:11:45 checking revisions... [ 34.098728] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:11:45 testing simple program... [ 34.148533] cgroup: Unknown subsys name 'net' [ 34.212752] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:11:45 Registers: info registers vcpu 0 RAX=000055fbac00f010 RBX=0000000000000012 RCX=0000000000000022 RDX=0000000000000003 RSI=000055fbac049e90 RDI=000000000000012c RBP=000000000000012c RSP=00007ffca6fc5e80 R8 =000055fbac04b420 R9 =000000000000001b R10=000055fbac02deb0 R11=0000000000000000 R12=fffffffffffffe28 R13=00007ffca6fc6490 R14=000055fbac059e20 R15=000000000000012c RIP=00007fdfe6d6f20b 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 00007fdfe68f1900 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=00007fdfe6ea90b0 CR3=0000000014534000 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=5f6d61702c78756e696c65735f6d6170 XMM01=2c74696d7265705f6d61702c74696e69 XMM02=2c78696e755f6d61702c74696d726570 XMM03=2c6469756e69676f6c5f6d61702c7875 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2029286e65706f5f7469647561007325 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=0000000000000001 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=00007feca9575d30 CR3=000000000c6a0000 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=deb56c7663449084704ba452cef3d092 XMM02=000000000011d9a0ec2efd57dc4c00df XMM03=00000000001216482c1717a34b134e21 XMM04=0ff9b65c3888678500000000000ae988 XMM05=6b14432a0ebb40770000000000133940 XMM06=bdf2e299e47b49d50000000000132670 XMM07=e042d86d42eb936e0000000000121920 XMM08=2c1717a34b134e21000000000011da00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000