syzkaller login: [ 32.222536] BUG: Bad rss-counter state mm:000000005dbe72b6 type:MM_FILEPAGES val:33 [ 32.223556] BUG: Bad rss-counter state mm:000000005dbe72b6 type:MM_ANONPAGES val:22 [ 32.261318] ================================================================== [ 32.262330] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.263453] Read of size 8 at addr ffff8880158bed08 by task sshd/220 [ 32.264395] [ 32.264675] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.265670] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.266688] Call Trace: [ 32.267020] [ 32.267313] dump_stack_lvl+0x91/0xf0 [ 32.267838] print_report+0xcc/0x620 [ 32.268333] ? __virt_addr_valid+0x102/0x340 [ 32.268900] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.269563] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.270194] kasan_report+0xbe/0xf0 [ 32.270719] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.271353] vma_interval_tree_remove+0xc75/0xec0 [ 32.271990] vma_prepare+0xc54/0x11a0 [ 32.272527] __split_vma+0x5af/0x950 [ 32.273026] ? __pfx___split_vma+0x10/0x10 [ 32.273597] ? find_held_lock+0x2c/0x110 [ 32.274127] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.274731] ? lock_is_held_type+0x9f/0x120 [ 32.275285] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.275931] ? mtree_range_walk+0x632/0x900 [ 32.276531] ? mas_walk+0x5c7/0x7c0 [ 32.277012] do_vmi_munmap+0x1f1/0x2b0 [ 32.277550] mmap_region+0x1f9/0x2660 [ 32.278050] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.278585] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.279317] ? __pfx_lock_acquire+0x10/0x10 [ 32.279875] ? __pfx_mmap_region+0x10/0x10 [ 32.280430] ? security_mmap_addr+0x7d/0xa0 [ 32.280981] ? get_unmapped_area+0x1f5/0x3f0 [ 32.281577] do_mmap+0x854/0xf00 [ 32.282039] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.282559] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.283123] ksys_mmap_pgoff+0x3af/0x500 [ 32.283663] do_syscall_64+0x3f/0x90 [ 32.284145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.284810] RIP: 0033:0x7f4d476b7d82 [ 32.285354] 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 [ 32.287568] RSP: 002b:00007ffe10799a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.288516] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d476b7d82 [ 32.289403] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d46af1000 [ 32.290282] RBP: 00007f4d46af1000 R08: 0000000000000009 R09: 0000000000001000 [ 32.291140] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c673539ec0 [ 32.292021] R13: 00007ffe10799a70 R14: 00007ffe10799aa0 R15: 00007ffe10799e00 [ 32.292908] [ 32.293205] [ 32.293448] Allocated by task 213: [ 32.293887] kasan_save_stack+0x22/0x50 [ 32.294413] kasan_set_track+0x25/0x30 [ 32.294916] __kasan_slab_alloc+0x59/0x70 [ 32.295471] kmem_cache_alloc+0x16b/0x370 [ 32.295992] vm_area_dup+0x20/0x160 [ 32.296465] __split_vma+0x170/0x950 [ 32.296933] split_vma+0xc6/0x110 [ 32.297418] mprotect_fixup+0x8d2/0xb30 [ 32.297931] do_mprotect_pkey+0x87e/0xd40 [ 32.298475] __x64_sys_mprotect+0x78/0xc0 [ 32.299005] do_syscall_64+0x3f/0x90 [ 32.299511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.300174] [ 32.300411] Freed by task 213: [ 32.300809] kasan_save_stack+0x22/0x50 [ 32.301339] kasan_set_track+0x25/0x30 [ 32.301855] kasan_save_free_info+0x2b/0x50 [ 32.302482] __kasan_slab_free+0x10a/0x190 [ 32.303035] kmem_cache_free+0x10d/0x4d0 [ 32.303568] rcu_core+0x8c8/0x2860 [ 32.304027] __do_softirq+0x1b7/0x7d4 [ 32.304531] [ 32.304750] Last potentially related work creation: [ 32.305370] kasan_save_stack+0x22/0x50 [ 32.305888] __kasan_record_aux_stack+0x8e/0xa0 [ 32.306477] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.307120] remove_vma+0x139/0x170 [ 32.307592] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.308156] do_vmi_munmap+0x1f1/0x2b0 [ 32.308655] __vm_munmap+0x138/0x3a0 [ 32.309123] __x64_sys_munmap+0x59/0x80 [ 32.309653] do_syscall_64+0x3f/0x90 [ 32.310130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.310781] [ 32.310998] The buggy address belongs to the object at ffff8880158becb0 [ 32.310998] which belongs to the cache vm_area_struct of size 168 [ 32.312517] The buggy address is located 88 bytes inside of [ 32.312517] freed 168-byte region [ffff8880158becb0, ffff8880158bed58) [ 32.314033] [ 32.314260] The buggy address belongs to the physical page: [ 32.314976] page:00000000e2cff124 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158be [ 32.316157] memcg:ffff88800dc87b01 [ 32.316622] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.317322] page_type: 0xffffffff() [ 32.317812] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.318793] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc87b01 [ 32.319778] page dumped because: kasan: bad access detected [ 32.320493] [ 32.320723] Memory state around the buggy address: [ 32.321360] ffff8880158bec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.322290] ffff8880158bec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.323203] >ffff8880158bed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.324128] ^ [ 32.324607] ffff8880158bed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.325547] ffff8880158bee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.326464] ================================================================== [ 32.327537] Disabling lock debugging due to kernel taint [ 34.560580] BUG: Bad rss-counter state mm:0000000062db5375 type:MM_FILEPAGES val:33 [ 34.561773] BUG: Bad rss-counter state mm:0000000062db5375 type:MM_ANONPAGES val:22 [ 34.935745] BUG: Bad rss-counter state mm:0000000082d54118 type:MM_FILEPAGES val:33 [ 34.936773] BUG: Bad rss-counter state mm:0000000082d54118 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41204' (ECDSA) to the list of known hosts. 2023/06/19 20:14:24 fuzzer started 2023/06/19 20:14:24 dialing manager at localhost:44161 2023/06/19 20:14:24 checking machine... 2023/06/19 20:14:24 checking revisions... [ 35.730431] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:14:24 testing simple program... [ 35.785604] cgroup: Unknown subsys name 'net' [ 35.837414] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:14:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88806ce09db8 RSP=ffff88806ce09cf0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000001794df4530 R12=00000000005b99b3 R13=003b9aca00000000 R14=ffffffff85497f20 R15=0000000000000000 RIP=ffffffff813c840d RFL=00000006 [-----P-] 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 00007fb2eb917900 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=00007fb2ebece618 CR3=000000000edb2000 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=2033323a34313a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a34313a3032203931 XMM08=6c656e72656b3a725f6d65747379733a 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=0000000000000001 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=00007fe44cc9ae70 CR3=0000000008ee2000 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=73973ffbc479cb930345df92af3e5022 XMM02=000000000011c928eff9b2d0a8fce9cb XMM03=000000000011c9f82c67c8bc2e329bc3 XMM04=4ac61fa758900eb200000000000ae988 XMM05=19e9129bd510f2350000000000133e60 XMM06=b13ac0aa202f90c90000000000132cc8 XMM07=e042d86d42eb936e0000000000124560 XMM08=3d024121708cb1cd000000000011c9f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000