syzkaller login: [ 30.269255] BUG: Bad rss-counter state mm:00000000085e2211 type:MM_FILEPAGES val:33 [ 30.270467] BUG: Bad rss-counter state mm:00000000085e2211 type:MM_ANONPAGES val:22 [ 30.304160] ================================================================== [ 30.305213] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.306231] Read of size 8 at addr ffff88800c670140 by task sshd/219 [ 30.307130] [ 30.307349] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.308350] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.309349] Call Trace: [ 30.309667] [ 30.309956] dump_stack_lvl+0x91/0xf0 [ 30.310450] print_report+0xcc/0x620 [ 30.310965] ? __virt_addr_valid+0x102/0x340 [ 30.311517] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.312191] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.312904] kasan_report+0xbe/0xf0 [ 30.313375] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.314017] vma_interval_tree_remove+0xc75/0xec0 [ 30.314685] vma_prepare+0xc54/0x11a0 [ 30.315173] __split_vma+0x5af/0x950 [ 30.315639] ? __pfx___split_vma+0x10/0x10 [ 30.316261] ? find_held_lock+0x2c/0x110 [ 30.316870] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.317435] ? lock_is_held_type+0x9f/0x120 [ 30.317982] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.318674] ? mtree_range_walk+0x632/0x900 [ 30.319291] ? mas_walk+0x5c7/0x7c0 [ 30.319853] do_vmi_munmap+0x1f1/0x2b0 [ 30.320342] mmap_region+0x1f9/0x2660 [ 30.320904] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.321483] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.322314] ? __pfx_lock_acquire+0x10/0x10 [ 30.322962] ? __pfx_mmap_region+0x10/0x10 [ 30.323488] ? security_mmap_addr+0x7d/0xa0 [ 30.324013] ? get_unmapped_area+0x1f5/0x3f0 [ 30.324562] do_mmap+0x854/0xf00 [ 30.324997] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.325486] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.326051] ksys_mmap_pgoff+0x3af/0x500 [ 30.326555] do_syscall_64+0x3f/0x90 [ 30.327037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.327678] RIP: 0033:0x7fd5d8915d82 [ 30.328133] 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 [ 30.330274] RSP: 002b:00007ffcb79d05d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.331193] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd5d8915d82 [ 30.332037] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd5d7d4f000 [ 30.333067] RBP: 00007fd5d7d4f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.333923] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ba6bcdf70 [ 30.334776] R13: 00007ffcb79d05f0 R14: 00007ffcb79d0620 R15: 00007ffcb79d0980 [ 30.335645] [ 30.335937] [ 30.336152] Allocated by task 212: [ 30.336583] kasan_save_stack+0x22/0x50 [ 30.337092] kasan_set_track+0x25/0x30 [ 30.337594] __kasan_slab_alloc+0x59/0x70 [ 30.338123] kmem_cache_alloc+0x16b/0x370 [ 30.338641] vm_area_dup+0x20/0x160 [ 30.339105] __split_vma+0x170/0x950 [ 30.339568] split_vma+0xc6/0x110 [ 30.340017] mprotect_fixup+0x8d2/0xb30 [ 30.340517] do_mprotect_pkey+0x87e/0xd40 [ 30.341036] __x64_sys_mprotect+0x78/0xc0 [ 30.341554] do_syscall_64+0x3f/0x90 [ 30.342034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.342693] [ 30.342919] Freed by task 202: [ 30.343310] kasan_save_stack+0x22/0x50 [ 30.343809] kasan_set_track+0x25/0x30 [ 30.344301] kasan_save_free_info+0x2b/0x50 [ 30.344834] __kasan_slab_free+0x10a/0x190 [ 30.345359] kmem_cache_free+0x10d/0x4d0 [ 30.345864] rcu_core+0x8c8/0x2860 [ 30.346304] __do_softirq+0x1b7/0x7d4 [ 30.346777] [ 30.346998] Last potentially related work creation: [ 30.347583] kasan_save_stack+0x22/0x50 [ 30.348084] __kasan_record_aux_stack+0x8e/0xa0 [ 30.348655] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.349293] remove_vma+0x139/0x170 [ 30.349741] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.350293] do_vmi_munmap+0x1f1/0x2b0 [ 30.350779] __vm_munmap+0x138/0x3a0 [ 30.351262] __x64_sys_munmap+0x59/0x80 [ 30.351757] do_syscall_64+0x3f/0x90 [ 30.352228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.352865] [ 30.353080] The buggy address belongs to the object at ffff88800c6700e8 [ 30.353080] which belongs to the cache vm_area_struct of size 168 [ 30.354537] The buggy address is located 88 bytes inside of [ 30.354537] freed 168-byte region [ffff88800c6700e8, ffff88800c670190) [ 30.355938] [ 30.356156] The buggy address belongs to the physical page: [ 30.356817] page:00000000b2456885 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc670 [ 30.357897] memcg:ffff8880165a2601 [ 30.358324] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.358996] page_type: 0xffffffff() [ 30.359444] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.360357] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165a2601 [ 30.361254] page dumped because: kasan: bad access detected [ 30.361912] [ 30.362125] Memory state around the buggy address: [ 30.362704] ffff88800c670000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.363561] ffff88800c670080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.364420] >ffff88800c670100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.365265] ^ [ 30.365895] ffff88800c670180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.366745] ffff88800c670200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.367592] ================================================================== [ 30.368502] Disabling lock debugging due to kernel taint [ 32.452547] BUG: Bad rss-counter state mm:00000000acbe1372 type:MM_FILEPAGES val:33 [ 32.453828] BUG: Bad rss-counter state mm:00000000acbe1372 type:MM_ANONPAGES val:22 [ 33.031018] BUG: Bad rss-counter state mm:000000007ad5984d type:MM_FILEPAGES val:33 [ 33.032091] BUG: Bad rss-counter state mm:000000007ad5984d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22439' (ECDSA) to the list of known hosts. 2023/06/20 15:30:28 fuzzer started 2023/06/20 15:30:28 dialing manager at localhost:36067 2023/06/20 15:30:28 checking machine... 2023/06/20 15:30:28 checking revisions... [ 33.682115] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:30:28 testing simple program... [ 33.732218] cgroup: Unknown subsys name 'net' [ 33.784789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:30:28 Registers: info registers vcpu 0 RAX=000000002fe3b05a RBX=0000000046aa8688 RCX=ffff8880147ffc00 RDX=0000000000000008 RSI=0000000000000004 RDI=00000000d88289d4 RBP=0000000000000000 RSP=ffff8880147ffb68 R8 =0000000057612686 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff8880147ffbd0 R15=0000000000000008 RIP=ffffffff822704a2 RFL=00000207 [-----PC] 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 00007fd4ef5ae900 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=00007ffccfeb2000 CR3=0000000008dc8000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=ffff888008c04400 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=00007f9cc4edced0 CR3=0000000013a18000 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=6797c92d9730b0abc54b41a036883388 XMM02=ec2efd57dc4c00df000000000011b390 XMM03=57296cb8742b0453000000000011b460 XMM04=16ae53d028e5929b00000000000ae988 XMM05=063eb990171b66890000000000132dc8 XMM06=806171799158d9670000000000131e68 XMM07=e042d86d42eb936e0000000000122428 XMM08=57296cb8742b0453000000000011b460 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000