syzkaller login: [ 30.150830] BUG: Bad rss-counter state mm:00000000c1051494 type:MM_FILEPAGES val:33 [ 30.151893] BUG: Bad rss-counter state mm:00000000c1051494 type:MM_ANONPAGES val:22 [ 30.302954] ================================================================== [ 30.303905] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.304861] Read of size 8 at addr ffff88800ddf94e0 by task sshd/220 [ 30.305620] [ 30.305844] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.306855] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.307862] Call Trace: [ 30.308189] [ 30.308478] dump_stack_lvl+0x91/0xf0 [ 30.308986] print_report+0xcc/0x620 [ 30.309478] ? __virt_addr_valid+0x102/0x340 [ 30.310038] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.310666] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.311301] kasan_report+0xbe/0xf0 [ 30.311783] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.312421] vma_interval_tree_remove+0xc75/0xec0 [ 30.313030] vma_prepare+0xc54/0x11a0 [ 30.313510] __split_vma+0x5af/0x950 [ 30.313989] ? __pfx___split_vma+0x10/0x10 [ 30.314522] ? find_held_lock+0x2c/0x110 [ 30.315063] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.315632] ? lock_is_held_type+0x9f/0x120 [ 30.316182] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.316788] ? mtree_range_walk+0x632/0x900 [ 30.317344] ? mas_walk+0x5c7/0x7c0 [ 30.317824] do_vmi_munmap+0x1f1/0x2b0 [ 30.318316] mmap_region+0x1f9/0x2660 [ 30.318800] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.319335] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.320056] ? __pfx_lock_acquire+0x10/0x10 [ 30.320602] ? __pfx_mmap_region+0x10/0x10 [ 30.321140] ? security_mmap_addr+0x7d/0xa0 [ 30.321671] ? get_unmapped_area+0x1f5/0x3f0 [ 30.322224] do_mmap+0x854/0xf00 [ 30.322664] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.323178] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.323740] ksys_mmap_pgoff+0x3af/0x500 [ 30.324254] do_syscall_64+0x3f/0x90 [ 30.324733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.325384] RIP: 0033:0x7f3374513d82 [ 30.325844] 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 [ 30.327968] RSP: 002b:00007ffe17bd8048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.328878] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3374513d82 [ 30.329725] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f337394d000 [ 30.330576] RBP: 00007f337394d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.331429] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610e94a4f70 [ 30.332279] R13: 00007ffe17bd8060 R14: 00007ffe17bd8090 R15: 00007ffe17bd83f0 [ 30.333138] [ 30.333432] [ 30.333651] Allocated by task 213: [ 30.334093] kasan_save_stack+0x22/0x50 [ 30.334595] kasan_set_track+0x25/0x30 [ 30.335106] __kasan_slab_alloc+0x59/0x70 [ 30.335632] kmem_cache_alloc+0x16b/0x370 [ 30.336161] vm_area_dup+0x20/0x160 [ 30.336622] __split_vma+0x170/0x950 [ 30.337092] split_vma+0xc6/0x110 [ 30.337537] mprotect_fixup+0x8d2/0xb30 [ 30.338070] do_mprotect_pkey+0x87e/0xd40 [ 30.338611] __x64_sys_mprotect+0x78/0xc0 [ 30.339139] do_syscall_64+0x3f/0x90 [ 30.339629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.340297] [ 30.340514] Freed by task 213: [ 30.340918] kasan_save_stack+0x22/0x50 [ 30.341421] kasan_set_track+0x25/0x30 [ 30.341918] kasan_save_free_info+0x2b/0x50 [ 30.342461] __kasan_slab_free+0x10a/0x190 [ 30.343038] kmem_cache_free+0x10d/0x4d0 [ 30.343565] rcu_core+0x8c8/0x2860 [ 30.344013] __do_softirq+0x1b7/0x7d4 [ 30.344503] [ 30.344723] Last potentially related work creation: [ 30.345331] kasan_save_stack+0x22/0x50 [ 30.345834] __kasan_record_aux_stack+0x8e/0xa0 [ 30.346413] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.347085] remove_vma+0x139/0x170 [ 30.347624] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.348193] do_vmi_munmap+0x1f1/0x2b0 [ 30.348698] __vm_munmap+0x138/0x3a0 [ 30.349169] __x64_sys_munmap+0x59/0x80 [ 30.349674] do_syscall_64+0x3f/0x90 [ 30.350157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.350806] [ 30.351044] Second to last potentially related work creation: [ 30.351722] kasan_save_stack+0x22/0x50 [ 30.352225] __kasan_record_aux_stack+0x8e/0xa0 [ 30.352800] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.353438] remove_vma+0x139/0x170 [ 30.353893] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.354446] do_vmi_munmap+0x1f1/0x2b0 [ 30.354939] mmap_region+0x1f9/0x2660 [ 30.355421] do_mmap+0x854/0xf00 [ 30.355856] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.356346] ksys_mmap_pgoff+0x3af/0x500 [ 30.356845] do_syscall_64+0x3f/0x90 [ 30.357327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.357972] [ 30.358190] The buggy address belongs to the object at ffff88800ddf9488 [ 30.358190] which belongs to the cache vm_area_struct of size 168 [ 30.359674] The buggy address is located 88 bytes inside of [ 30.359674] freed 168-byte region [ffff88800ddf9488, ffff88800ddf9530) [ 30.361083] [ 30.361305] The buggy address belongs to the physical page: [ 30.361960] page:00000000db4cd76c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddf9 [ 30.363061] memcg:ffff88800e213801 [ 30.363493] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.364149] page_type: 0xffffffff() [ 30.364619] raw: 0100000000000200 ffff8880087a0c80 ffffea0000377400 dead000000000006 [ 30.365546] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e213801 [ 30.366475] page dumped because: kasan: bad access detected [ 30.367167] [ 30.367387] Memory state around the buggy address: [ 30.367983] ffff88800ddf9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.368863] ffff88800ddf9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.369729] >ffff88800ddf9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.370593] ^ [ 30.371381] ffff88800ddf9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.372244] ffff88800ddf9580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.373105] ================================================================== [ 30.374118] Disabling lock debugging due to kernel taint [ 32.901262] BUG: Bad rss-counter state mm:0000000080d1de49 type:MM_FILEPAGES val:33 [ 32.902307] BUG: Bad rss-counter state mm:0000000080d1de49 type:MM_ANONPAGES val:22 [ 33.390209] BUG: Bad rss-counter state mm:000000009051576f type:MM_FILEPAGES val:33 [ 33.391217] BUG: Bad rss-counter state mm:000000009051576f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56040' (ECDSA) to the list of known hosts. 2023/06/20 17:07:30 fuzzer started 2023/06/20 17:07:30 dialing manager at localhost:36067 2023/06/20 17:07:30 checking machine... 2023/06/20 17:07:30 checking revisions... [ 34.088698] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:07:30 testing simple program... [ 34.139549] cgroup: Unknown subsys name 'net' [ 34.185394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:07:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c08 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800fc83ec0 RIP=ffffffff84511dd4 RFL=00000202 [-------] 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 0000000000000000 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=00007f3c7bc02338 CR3=000000001960c000 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=2030333a37303a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a37303a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b2e4b RBX=0000000000000001 RCX=ffffffff863b2e46 RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c765c9 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff863b2e4a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008a835 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888016b17b50 R15=ffff88806cf09a98 RIP=ffffffff81131127 RFL=00000216 [----AP-] 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 00007f84545ed900 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=00007f8454ba4618 CR3=000000000e762000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000