syzkaller login: [ 49.078358] BUG: Bad rss-counter state mm:0000000068095311 type:MM_FILEPAGES val:33 [ 49.079373] BUG: Bad rss-counter state mm:0000000068095311 type:MM_ANONPAGES val:22 [ 49.256044] ================================================================== [ 49.256986] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.257978] Read of size 8 at addr ffff88800c8d2140 by task sshd/225 [ 49.258768] [ 49.258997] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.260046] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.261053] Call Trace: [ 49.261383] [ 49.261702] dump_stack_lvl+0x91/0xf0 [ 49.262206] print_report+0xcc/0x620 [ 49.262698] ? __virt_addr_valid+0x102/0x340 [ 49.263274] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.263908] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.264532] kasan_report+0xbe/0xf0 [ 49.265017] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.265658] vma_interval_tree_remove+0xc75/0xec0 [ 49.266271] vma_prepare+0xc54/0x11a0 [ 49.266756] __split_vma+0x5af/0x950 [ 49.267239] ? __pfx___split_vma+0x10/0x10 [ 49.267778] ? find_held_lock+0x2c/0x110 [ 49.268308] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.268882] ? lock_is_held_type+0x9f/0x120 [ 49.269427] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.270059] ? mtree_range_walk+0x632/0x900 [ 49.270617] ? mas_walk+0x5c7/0x7c0 [ 49.271101] do_vmi_munmap+0x1f1/0x2b0 [ 49.271602] mmap_region+0x1f9/0x2660 [ 49.272091] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.272614] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.273342] ? __pfx_lock_acquire+0x10/0x10 [ 49.273894] ? __pfx_mmap_region+0x10/0x10 [ 49.274436] ? security_mmap_addr+0x7d/0xa0 [ 49.274980] ? get_unmapped_area+0x1f5/0x3f0 [ 49.275543] do_mmap+0x854/0xf00 [ 49.275996] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.276495] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.277078] ksys_mmap_pgoff+0x3af/0x500 [ 49.277602] do_syscall_64+0x3f/0x90 [ 49.278084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.278734] RIP: 0033:0x7fbb2b96ed82 [ 49.279198] 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 [ 49.281355] RSP: 002b:00007ffced7e5038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.282280] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb2b96ed82 [ 49.283119] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb2ada8000 [ 49.283963] RBP: 00007fbb2ada8000 R08: 0000000000000009 R09: 0000000000001000 [ 49.284805] R10: 0000000000000812 R11: 0000000000000206 R12: 000056302ac34ec0 [ 49.285658] R13: 00007ffced7e5050 R14: 00007ffced7e5080 R15: 00007ffced7e53e0 [ 49.286513] [ 49.286810] [ 49.287027] Allocated by task 218: [ 49.287456] kasan_save_stack+0x22/0x50 [ 49.287965] kasan_set_track+0x25/0x30 [ 49.288457] __kasan_slab_alloc+0x59/0x70 [ 49.288990] kmem_cache_alloc+0x16b/0x370 [ 49.289502] vm_area_dup+0x20/0x160 [ 49.289977] __split_vma+0x170/0x950 [ 49.290447] split_vma+0xc6/0x110 [ 49.290885] mprotect_fixup+0x8d2/0xb30 [ 49.291387] do_mprotect_pkey+0x87e/0xd40 [ 49.291910] __x64_sys_mprotect+0x78/0xc0 [ 49.292432] do_syscall_64+0x3f/0x90 [ 49.292908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.293555] [ 49.293779] Freed by task 203: [ 49.294172] kasan_save_stack+0x22/0x50 [ 49.294676] kasan_set_track+0x25/0x30 [ 49.295169] kasan_save_free_info+0x2b/0x50 [ 49.295701] __kasan_slab_free+0x10a/0x190 [ 49.296231] kmem_cache_free+0x10d/0x4d0 [ 49.296741] rcu_core+0x8c8/0x2860 [ 49.297269] __do_softirq+0x1b7/0x7d4 [ 49.297871] [ 49.298129] Last potentially related work creation: [ 49.298854] kasan_save_stack+0x22/0x50 [ 49.299469] __kasan_record_aux_stack+0x8e/0xa0 [ 49.300222] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.301016] remove_vma+0x139/0x170 [ 49.301577] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.302257] do_vmi_munmap+0x1f1/0x2b0 [ 49.302860] __vm_munmap+0x138/0x3a0 [ 49.303427] __x64_sys_munmap+0x59/0x80 [ 49.304041] do_syscall_64+0x3f/0x90 [ 49.304625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.305419] [ 49.305694] Second to last potentially related work creation: [ 49.306535] kasan_save_stack+0x22/0x50 [ 49.307151] __kasan_record_aux_stack+0x8e/0xa0 [ 49.307866] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.308653] remove_vma+0x139/0x170 [ 49.309200] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.309917] do_vmi_munmap+0x1f1/0x2b0 [ 49.310507] mmap_region+0x1f9/0x2660 [ 49.311093] do_mmap+0x854/0xf00 [ 49.311621] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.312221] ksys_mmap_pgoff+0x3af/0x500 [ 49.312820] do_syscall_64+0x3f/0x90 [ 49.313388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.314178] [ 49.314436] The buggy address belongs to the object at ffff88800c8d20e8 [ 49.314436] which belongs to the cache vm_area_struct of size 168 [ 49.316204] The buggy address is located 88 bytes inside of [ 49.316204] freed 168-byte region [ffff88800c8d20e8, ffff88800c8d2190) [ 49.317928] [ 49.318185] The buggy address belongs to the physical page: [ 49.318975] page:00000000d4772d11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc8d2 [ 49.320282] memcg:ffff88800f4f7d01 [ 49.320790] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 49.321630] page_type: 0xffffffff() [ 49.322169] raw: 0100000000000200 ffff88800879fc80 ffffea0000329b00 dead00000000000d [ 49.323267] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f4f7d01 [ 49.324350] page dumped because: kasan: bad access detected [ 49.325148] [ 49.325408] Memory state around the buggy address: [ 49.326144] ffff88800c8d2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.327169] ffff88800c8d2080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 49.328194] >ffff88800c8d2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.329196] ^ [ 49.329967] ffff88800c8d2180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 49.330980] ffff88800c8d2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 49.331995] ================================================================== [ 49.333158] Disabling lock debugging due to kernel taint [ 51.276156] BUG: Bad rss-counter state mm:00000000d5d8c8b6 type:MM_FILEPAGES val:33 [ 51.277336] BUG: Bad rss-counter state mm:00000000d5d8c8b6 type:MM_ANONPAGES val:22 [ 51.835035] BUG: Bad rss-counter state mm:00000000acc4af4a type:MM_FILEPAGES val:33 [ 51.836208] BUG: Bad rss-counter state mm:00000000acc4af4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39160' (ECDSA) to the list of known hosts. 2023/06/19 23:52:32 fuzzer started 2023/06/19 23:52:33 dialing manager at localhost:44161 2023/06/19 23:52:33 checking machine... 2023/06/19 23:52:33 checking revisions... [ 52.500543] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:52:33 testing simple program... [ 52.545289] cgroup: Unknown subsys name 'net' [ 52.580220] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:52:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055bae9f16a00 RCX=0000000000000005 RDX=0000000000000002 RSI=000055bae9f1b719 RDI=00007f88ae9d100b RBP=0000000000000020 RSP=00007fffaffa7cd0 R8 =000055bae9efd350 R9 =000055bae9f1b718 R10=00007f88ae9d1010 R11=00007f88ae9d1016 R12=000055bae9f16a10 R13=0000000000000000 R14=0000000000000000 R15=00007f88ae9d100a RIP=00007f88ae9d02ac RFL=00000216 [----AP-] 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 00007f88aea29900 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=00007f88aefde650 CR3=000000000c5c8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c58400 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=00007f145de496f0 CR3=000000000c90a000 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=0fa1b98234997892a04364a17d98540b XMM02=2c67c8bc2e329bc3000000000011d870 XMM03=fb795ef6d65770560000000000124210 XMM04=9afd89d8971e9b3500000000000ae988 XMM05=e7a3b750822471340000000000134e38 XMM06=c7685b25862f13490000000000134010 XMM07=e042d86d42eb936e00000000001244e8 XMM08=1cdd9543aa11cc04000000000011d8d0 XMM09=00000000000000000000000000000000 XMM10=00200000000000000000000020000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000