syzkaller login: [ 29.638084] BUG: Bad rss-counter state mm:0000000055525017 type:MM_FILEPAGES val:33 [ 29.638853] BUG: Bad rss-counter state mm:0000000055525017 type:MM_ANONPAGES val:22 [ 29.818041] ================================================================== [ 29.818811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.819583] Read of size 8 at addr ffff88800cbc0b38 by task sshd/221 [ 29.820198] [ 29.820368] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.821406] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.822732] Call Trace: [ 29.823132] [ 29.823506] dump_stack_lvl+0x91/0xf0 [ 29.824105] print_report+0xcc/0x620 [ 29.824715] ? __virt_addr_valid+0x102/0x340 [ 29.825409] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.826158] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.826942] kasan_report+0xbe/0xf0 [ 29.827533] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.828290] vma_interval_tree_remove+0xc75/0xec0 [ 29.829062] vma_prepare+0xc54/0x11a0 [ 29.829657] __split_vma+0x5af/0x950 [ 29.830218] ? __pfx___split_vma+0x10/0x10 [ 29.830856] ? find_held_lock+0x2c/0x110 [ 29.831484] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.832197] ? lock_is_held_type+0x9f/0x120 [ 29.832909] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.833659] ? mtree_range_walk+0x632/0x900 [ 29.834048] ? mas_walk+0x5c7/0x7c0 [ 29.834355] do_vmi_munmap+0x1f1/0x2b0 [ 29.834690] mmap_region+0x1f9/0x2660 [ 29.835003] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.835338] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.835810] ? __pfx_lock_acquire+0x10/0x10 [ 29.836158] ? __pfx_mmap_region+0x10/0x10 [ 29.836515] ? security_mmap_addr+0x7d/0xa0 [ 29.836883] ? get_unmapped_area+0x1f5/0x3f0 [ 29.837241] do_mmap+0x854/0xf00 [ 29.837524] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.837863] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.838245] ksys_mmap_pgoff+0x3af/0x500 [ 29.838589] do_syscall_64+0x3f/0x90 [ 29.838926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.839370] RIP: 0033:0x7f8d1d9a5d82 [ 29.839669] 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 [ 29.841109] RSP: 002b:00007ffc4d437198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.841734] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d1d9a5d82 [ 29.842335] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d1cddf000 [ 29.842910] RBP: 00007f8d1cddf000 R08: 0000000000000009 R09: 0000000000001000 [ 29.843468] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d88e06f60 [ 29.844040] R13: 00007ffc4d4371b0 R14: 00007ffc4d4371e0 R15: 00007ffc4d437540 [ 29.844605] [ 29.844820] [ 29.844988] Allocated by task 214: [ 29.845269] kasan_save_stack+0x22/0x50 [ 29.845605] kasan_set_track+0x25/0x30 [ 29.845931] __kasan_slab_alloc+0x59/0x70 [ 29.846307] kmem_cache_alloc+0x16b/0x370 [ 29.846666] vm_area_dup+0x20/0x160 [ 29.846979] __split_vma+0x170/0x950 [ 29.847290] split_vma+0xc6/0x110 [ 29.847584] mprotect_fixup+0x8d2/0xb30 [ 29.847910] do_mprotect_pkey+0x87e/0xd40 [ 29.848270] __x64_sys_mprotect+0x78/0xc0 [ 29.848611] do_syscall_64+0x3f/0x90 [ 29.848941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.849387] [ 29.849532] Freed by task 13: [ 29.849781] kasan_save_stack+0x22/0x50 [ 29.850107] kasan_set_track+0x25/0x30 [ 29.850461] kasan_save_free_info+0x2b/0x50 [ 29.850807] __kasan_slab_free+0x10a/0x190 [ 29.851150] kmem_cache_free+0x10d/0x4d0 [ 29.851489] rcu_core+0x8c8/0x2860 [ 29.851784] __do_softirq+0x1b7/0x7d4 [ 29.852097] [ 29.852250] Last potentially related work creation: [ 29.852658] kasan_save_stack+0x22/0x50 [ 29.853008] __kasan_record_aux_stack+0x8e/0xa0 [ 29.853388] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.853840] remove_vma+0x139/0x170 [ 29.854149] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.854528] do_vmi_munmap+0x1f1/0x2b0 [ 29.854860] __vm_munmap+0x138/0x3a0 [ 29.855182] __x64_sys_munmap+0x59/0x80 [ 29.855514] do_syscall_64+0x3f/0x90 [ 29.855853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.856294] [ 29.856449] Second to last potentially related work creation: [ 29.856921] kasan_save_stack+0x22/0x50 [ 29.857259] __kasan_record_aux_stack+0x8e/0xa0 [ 29.857640] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.858071] remove_vma+0x139/0x170 [ 29.858378] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.858767] do_vmi_munmap+0x1f1/0x2b0 [ 29.859096] mmap_region+0x1f9/0x2660 [ 29.859415] do_mmap+0x854/0xf00 [ 29.859742] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.860081] ksys_mmap_pgoff+0x3af/0x500 [ 29.860425] do_syscall_64+0x3f/0x90 [ 29.860791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.861239] [ 29.861385] The buggy address belongs to the object at ffff88800cbc0ae0 [ 29.861385] which belongs to the cache vm_area_struct of size 168 [ 29.862413] The buggy address is located 88 bytes inside of [ 29.862413] freed 168-byte region [ffff88800cbc0ae0, ffff88800cbc0b88) [ 29.863410] [ 29.863569] The buggy address belongs to the physical page: [ 29.864034] page:00000000fab668b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbc0 [ 29.864765] memcg:ffff888009871301 [ 29.865054] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.865520] page_type: 0xffffffff() [ 29.865827] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bf980 dead000000000005 [ 29.866431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009871301 [ 29.867029] page dumped because: kasan: bad access detected [ 29.867502] [ 29.867641] Memory state around the buggy address: [ 29.868032] ffff88800cbc0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.868592] ffff88800cbc0a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.869178] >ffff88800cbc0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.869760] ^ [ 29.870180] ffff88800cbc0b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.870745] ffff88800cbc0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.871310] ================================================================== [ 29.871961] Disabling lock debugging due to kernel taint [ 31.508495] BUG: Bad rss-counter state mm:00000000501bc184 type:MM_FILEPAGES val:33 [ 31.509102] BUG: Bad rss-counter state mm:00000000501bc184 type:MM_ANONPAGES val:22 [ 31.884013] BUG: Bad rss-counter state mm:00000000f5c78dbd type:MM_FILEPAGES val:33 [ 31.884618] BUG: Bad rss-counter state mm:00000000f5c78dbd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24914' (ECDSA) to the list of known hosts. 2023/06/20 22:03:35 fuzzer started 2023/06/20 22:03:35 dialing manager at localhost:36067 2023/06/20 22:03:35 checking machine... 2023/06/20 22:03:35 checking revisions... [ 32.524753] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:03:36 testing simple program... [ 32.563027] cgroup: Unknown subsys name 'net' [ 32.619780] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:03:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002ca4fa2 RCX=ffffffff8363e846 RDX=ffff8880161e3680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000008 RSP=ffff888016527cf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007ffff400cc7c R13=0000000000000042 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff814c0864 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 00007f52f54db900 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=00007ffff400d000 CR3=000000000ce8e000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f16d27662a0 CR3=000000000d7ea000 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=b1ce7547e73cab931841bbb4f7cc29b0 XMM02=000000000011d768ec2efd57dc4c00df XMM03=0000000000121e301fe979e01caf6a8b XMM04=1f1a49fb7be9496e00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133190 XMM06=c291bd5c70af25b90000000000133018 XMM07=e042d86d42eb936e00000000001220b0 XMM08=1fe979e01caf6a8b000000000011d7c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000