syzkaller login: [ 38.212785] BUG: Bad rss-counter state mm:00000000770512f1 type:MM_FILEPAGES val:33 [ 38.213778] BUG: Bad rss-counter state mm:00000000770512f1 type:MM_ANONPAGES val:22 [ 38.376196] ================================================================== [ 38.377255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.378403] Read of size 8 at addr ffff88801c05ac20 by task sshd/220 [ 38.379267] [ 38.379484] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.380347] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.381356] Call Trace: [ 38.381683] [ 38.381969] dump_stack_lvl+0x91/0xf0 [ 38.382491] print_report+0xcc/0x620 [ 38.382978] ? __virt_addr_valid+0x102/0x340 [ 38.383541] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.384155] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.384775] kasan_report+0xbe/0xf0 [ 38.385257] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.385880] vma_interval_tree_remove+0xc75/0xec0 [ 38.386505] vma_prepare+0xc54/0x11a0 [ 38.386984] __split_vma+0x5af/0x950 [ 38.387452] ? __pfx___split_vma+0x10/0x10 [ 38.387980] ? find_held_lock+0x2c/0x110 [ 38.388500] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.389059] ? lock_is_held_type+0x9f/0x120 [ 38.389592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.390243] ? mtree_range_walk+0x632/0x900 [ 38.390795] ? mas_walk+0x5c7/0x7c0 [ 38.391270] do_vmi_munmap+0x1f1/0x2b0 [ 38.391762] mmap_region+0x1f9/0x2660 [ 38.392244] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.392756] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.393465] ? __pfx_lock_acquire+0x10/0x10 [ 38.394025] ? __pfx_mmap_region+0x10/0x10 [ 38.394560] ? security_mmap_addr+0x7d/0xa0 [ 38.395097] ? get_unmapped_area+0x1f5/0x3f0 [ 38.395646] do_mmap+0x854/0xf00 [ 38.396086] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.396582] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.397146] ksys_mmap_pgoff+0x3af/0x500 [ 38.397652] do_syscall_64+0x3f/0x90 [ 38.398160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.398803] RIP: 0033:0x7f99ceeefd82 [ 38.399263] 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 [ 38.401376] RSP: 002b:00007fff8efcdd18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.402277] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99ceeefd82 [ 38.403127] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99ce329000 [ 38.403971] RBP: 00007f99ce329000 R08: 0000000000000009 R09: 0000000000001000 [ 38.404806] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a627a51ec0 [ 38.405649] R13: 00007fff8efcdd30 R14: 00007fff8efcdd60 R15: 00007fff8efce0c0 [ 38.406509] [ 38.406802] [ 38.407015] Allocated by task 213: [ 38.407444] kasan_save_stack+0x22/0x50 [ 38.407944] kasan_set_track+0x25/0x30 [ 38.408443] __kasan_slab_alloc+0x59/0x70 [ 38.408966] kmem_cache_alloc+0x16b/0x370 [ 38.409480] vm_area_dup+0x20/0x160 [ 38.409930] __split_vma+0x170/0x950 [ 38.410418] split_vma+0xc6/0x110 [ 38.410852] mprotect_fixup+0x8d2/0xb30 [ 38.411348] do_mprotect_pkey+0x87e/0xd40 [ 38.411872] __x64_sys_mprotect+0x78/0xc0 [ 38.412392] do_syscall_64+0x3f/0x90 [ 38.412864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.413501] [ 38.413716] Freed by task 203: [ 38.414115] kasan_save_stack+0x22/0x50 [ 38.414612] kasan_set_track+0x25/0x30 [ 38.415105] kasan_save_free_info+0x2b/0x50 [ 38.415638] __kasan_slab_free+0x10a/0x190 [ 38.416170] kmem_cache_free+0x10d/0x4d0 [ 38.416679] rcu_core+0x8c8/0x2860 [ 38.417119] __do_softirq+0x1b7/0x7d4 [ 38.417590] [ 38.417802] Last potentially related work creation: [ 38.418443] kasan_save_stack+0x22/0x50 [ 38.418946] __kasan_record_aux_stack+0x8e/0xa0 [ 38.419514] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.420166] remove_vma+0x139/0x170 [ 38.420617] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.421186] do_vmi_munmap+0x1f1/0x2b0 [ 38.421683] __vm_munmap+0x138/0x3a0 [ 38.422167] __x64_sys_munmap+0x59/0x80 [ 38.422672] do_syscall_64+0x3f/0x90 [ 38.423151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.423802] [ 38.424024] The buggy address belongs to the object at ffff88801c05abc8 [ 38.424024] which belongs to the cache vm_area_struct of size 168 [ 38.425482] The buggy address is located 88 bytes inside of [ 38.425482] freed 168-byte region [ffff88801c05abc8, ffff88801c05ac70) [ 38.426912] [ 38.427127] The buggy address belongs to the physical page: [ 38.427789] page:00000000a03074c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c05a [ 38.428876] memcg:ffff88801a0bc301 [ 38.429298] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.429934] page_type: 0xffffffff() [ 38.430389] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.431311] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0bc301 [ 38.432213] page dumped because: kasan: bad access detected [ 38.432880] [ 38.433096] Memory state around the buggy address: [ 38.433667] ffff88801c05ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.434537] ffff88801c05ab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.435382] >ffff88801c05ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.436225] ^ [ 38.436750] ffff88801c05ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.437598] ffff88801c05ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.438464] ================================================================== [ 38.439422] Disabling lock debugging due to kernel taint [ 40.360642] BUG: Bad rss-counter state mm:00000000a426a107 type:MM_FILEPAGES val:33 [ 40.361660] BUG: Bad rss-counter state mm:00000000a426a107 type:MM_ANONPAGES val:22 [ 40.820902] BUG: Bad rss-counter state mm:000000003037ce40 type:MM_FILEPAGES val:33 [ 40.821920] BUG: Bad rss-counter state mm:000000003037ce40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8391' (ECDSA) to the list of known hosts. 2023/06/19 18:27:52 fuzzer started 2023/06/19 18:27:52 dialing manager at localhost:44161 2023/06/19 18:27:52 checking machine... 2023/06/19 18:27:52 checking revisions... [ 41.533482] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:27:52 testing simple program... [ 41.586293] cgroup: Unknown subsys name 'net' [ 41.639667] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:27:44 Registers: info registers vcpu 0 RAX=ffffffff863b23fd RBX=0000000000000001 RCX=ffffffff863b23f8 RDX=0000000000000002 RSI=0000000000000005 RDI=ffffffff85fa3e9c RBP=ffff888019c77728 RSP=ffff888019c77660 R8 =ffffffff863b23f8 R9 =ffff888019c77710 R10=0000000000038001 R11=000000000008aab2 R12=ffff888019c77730 R13=ffff888019c77718 R14=ffff888019c77711 R15=ffff888019c776d0 RIP=ffffffff81130a72 RFL=00000246 [---Z-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 00007f0bba65a900 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=00007fff08e9d000 CR3=000000000cc02000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f40f0278de0 CR3=000000000cb04000 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=eb1e9569877005aa8e43a134b7731f9c XMM02=2c67c8bc2e329bc3000000000011d998 XMM03=fb795ef6d65770560000000000124740 XMM04=cb408ef9cb2f681500000000000ae988 XMM05=19e9129bd510f23500000000001342c8 XMM06=057937d575cb31010000000000133130 XMM07=e042d86d42eb936e00000000001249c0 XMM08=cb5ab25af7f5bde3000000000011d9f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000