syzkaller login: [ 34.562184] BUG: Bad rss-counter state mm:000000001494b74e type:MM_FILEPAGES val:33 [ 34.563187] BUG: Bad rss-counter state mm:000000001494b74e type:MM_ANONPAGES val:22 [ 34.736006] ================================================================== [ 34.737064] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.738178] Read of size 8 at addr ffff88800ee54968 by task sshd/220 [ 34.738995] [ 34.739203] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.740039] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.740980] Call Trace: [ 34.741286] [ 34.741559] dump_stack_lvl+0x91/0xf0 [ 34.742047] print_report+0xcc/0x620 [ 34.742509] ? __virt_addr_valid+0x102/0x340 [ 34.743047] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.743629] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.744236] kasan_report+0xbe/0xf0 [ 34.744701] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.745292] vma_interval_tree_remove+0xc75/0xec0 [ 34.745885] vma_prepare+0xc54/0x11a0 [ 34.746371] __split_vma+0x5af/0x950 [ 34.746841] ? __pfx___split_vma+0x10/0x10 [ 34.747347] ? find_held_lock+0x2c/0x110 [ 34.747874] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.748421] ? lock_is_held_type+0x9f/0x120 [ 34.748955] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.749537] ? mtree_range_walk+0x632/0x900 [ 34.750102] ? mas_walk+0x5c7/0x7c0 [ 34.750556] do_vmi_munmap+0x1f1/0x2b0 [ 34.751053] mmap_region+0x1f9/0x2660 [ 34.751517] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.752034] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.752742] ? __pfx_lock_acquire+0x10/0x10 [ 34.753266] ? __pfx_mmap_region+0x10/0x10 [ 34.753803] ? security_mmap_addr+0x7d/0xa0 [ 34.754330] ? get_unmapped_area+0x1f5/0x3f0 [ 34.754872] do_mmap+0x854/0xf00 [ 34.755290] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.755781] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.756338] ksys_mmap_pgoff+0x3af/0x500 [ 34.756848] do_syscall_64+0x3f/0x90 [ 34.757306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.757957] RIP: 0033:0x7f7efe887d82 [ 34.758400] 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 [ 34.760424] RSP: 002b:00007fffb4071068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.761297] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7efe887d82 [ 34.762150] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7efdcc1000 [ 34.762976] RBP: 00007f7efdcc1000 R08: 0000000000000009 R09: 0000000000001000 [ 34.763795] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561cc35adf70 [ 34.764594] R13: 00007fffb4071080 R14: 00007fffb40710b0 R15: 00007fffb4071410 [ 34.765428] [ 34.765749] [ 34.765993] Allocated by task 213: [ 34.766424] kasan_save_stack+0x22/0x50 [ 34.766973] kasan_set_track+0x25/0x30 [ 34.767466] __kasan_slab_alloc+0x59/0x70 [ 34.768125] kmem_cache_alloc+0x16b/0x370 [ 34.768826] vm_area_dup+0x20/0x160 [ 34.769463] __split_vma+0x170/0x950 [ 34.769982] split_vma+0xc6/0x110 [ 34.770445] mprotect_fixup+0x8d2/0xb30 [ 34.771140] do_mprotect_pkey+0x87e/0xd40 [ 34.771836] __x64_sys_mprotect+0x78/0xc0 [ 34.772521] do_syscall_64+0x3f/0x90 [ 34.773140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.774003] [ 34.774295] Freed by task 13: [ 34.774808] kasan_save_stack+0x22/0x50 [ 34.775469] kasan_set_track+0x25/0x30 [ 34.776005] kasan_save_free_info+0x2b/0x50 [ 34.776541] __kasan_slab_free+0x10a/0x190 [ 34.777099] kmem_cache_free+0x10d/0x4d0 [ 34.777615] rcu_core+0x8c8/0x2860 [ 34.778104] __do_softirq+0x1b7/0x7d4 [ 34.778591] [ 34.778822] Last potentially related work creation: [ 34.779409] kasan_save_stack+0x22/0x50 [ 34.779950] __kasan_record_aux_stack+0x8e/0xa0 [ 34.780536] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.781199] remove_vma+0x139/0x170 [ 34.781664] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.782266] do_vmi_munmap+0x1f1/0x2b0 [ 34.782764] __vm_munmap+0x138/0x3a0 [ 34.783235] __x64_sys_munmap+0x59/0x80 [ 34.783765] do_syscall_64+0x3f/0x90 [ 34.784241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.784903] [ 34.785119] Second to last potentially related work creation: [ 34.785817] kasan_save_stack+0x22/0x50 [ 34.786334] __kasan_record_aux_stack+0x8e/0xa0 [ 34.786930] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.787583] remove_vma+0x139/0x170 [ 34.788050] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.788627] do_vmi_munmap+0x1f1/0x2b0 [ 34.789146] mmap_region+0x1f9/0x2660 [ 34.789625] do_mmap+0x854/0xf00 [ 34.790100] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.790595] ksys_mmap_pgoff+0x3af/0x500 [ 34.791105] do_syscall_64+0x3f/0x90 [ 34.791579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.792237] [ 34.792461] The buggy address belongs to the object at ffff88800ee54910 [ 34.792461] which belongs to the cache vm_area_struct of size 168 [ 34.794003] The buggy address is located 88 bytes inside of [ 34.794003] freed 168-byte region [ffff88800ee54910, ffff88800ee549b8) [ 34.795438] [ 34.795659] The buggy address belongs to the physical page: [ 34.796337] page:000000009d55090e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee54 [ 34.797436] memcg:ffff88800d450201 [ 34.797895] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.798623] page_type: 0xffffffff() [ 34.799102] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 34.800041] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d450201 [ 34.800977] page dumped because: kasan: bad access detected [ 34.801652] [ 34.801888] Memory state around the buggy address: [ 34.802506] ffff88800ee54800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.803389] ffff88800ee54880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.804275] >ffff88800ee54900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.805151] ^ [ 34.805972] ffff88800ee54980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.806847] ffff88800ee54a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.807736] ================================================================== [ 34.808884] Disabling lock debugging due to kernel taint [ 36.798028] BUG: Bad rss-counter state mm:0000000067714f96 type:MM_FILEPAGES val:33 [ 36.799184] BUG: Bad rss-counter state mm:0000000067714f96 type:MM_ANONPAGES val:22 [ 37.348858] BUG: Bad rss-counter state mm:0000000026d501d9 type:MM_FILEPAGES val:33 [ 37.349839] BUG: Bad rss-counter state mm:0000000026d501d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11380' (ECDSA) to the list of known hosts. 2023/06/20 03:36:45 fuzzer started 2023/06/20 03:36:45 dialing manager at localhost:44161 2023/06/20 03:36:45 checking machine... 2023/06/20 03:36:45 checking revisions... [ 38.012111] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:36:45 testing simple program... [ 38.073149] cgroup: Unknown subsys name 'net' [ 38.109541] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:36:41 Registers: info registers vcpu 0 RAX=ffffffff8613fb4d RBX=0000000000000001 RCX=ffffffff8613fb48 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800f0df930 RSP=ffff88800f0df868 R8 =ffffffff8613fb4c R9 =ffff88800f0df918 R10=0000000000038001 R11=00000000000223e2 R12=ffff88800f0df938 R13=ffff88800f0df920 R14=ffff88800f0df919 R15=ffff88800f0df8d8 RIP=ffffffff81130ab5 RFL=00000297 [--S-APC] 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 00007f02fdd55900 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=00007f02fe30d0b0 CR3=000000001468a000 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=00007f6cdd7e5180 CR3=000000000d624000 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=0d22518ed1ea829cc54202dce2c56bc3 XMM02=2c67c8bc2e329bc3000000000011cda0 XMM03=fb795ef6d65770560000000000124208 XMM04=ee4904b8cad02e3400000000000ae988 XMM05=19e9129bd510f2350000000000135108 XMM06=48a755812d65b5bc0000000000133f70 XMM07=e042d86d42eb936e0000000000124488 XMM08=757a1de97d946b79000000000011ce00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000