syzkaller login: [ 35.634393] sshd (217) used greatest stack depth: 24128 bytes left [ 35.635608] BUG: Bad rss-counter state mm:00000000e5967ff2 type:MM_FILEPAGES val:33 [ 35.637408] BUG: Bad rss-counter state mm:00000000e5967ff2 type:MM_ANONPAGES val:22 [ 35.796448] ================================================================== [ 35.797389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.798340] Read of size 8 at addr ffff888019882c20 by task sshd/224 [ 35.799111] [ 35.799489] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.800401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.801396] Call Trace: [ 35.801722] [ 35.802019] dump_stack_lvl+0x91/0xf0 [ 35.802515] print_report+0xcc/0x620 [ 35.803008] ? __virt_addr_valid+0x102/0x340 [ 35.803575] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.804233] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.804854] kasan_report+0xbe/0xf0 [ 35.805338] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.805965] vma_interval_tree_remove+0xc75/0xec0 [ 35.806585] vma_prepare+0xc54/0x11a0 [ 35.807063] __split_vma+0x5af/0x950 [ 35.807533] ? __pfx___split_vma+0x10/0x10 [ 35.808066] ? find_held_lock+0x2c/0x110 [ 35.808616] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.809179] ? lock_is_held_type+0x9f/0x120 [ 35.809715] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.810322] ? mtree_range_walk+0x632/0x900 [ 35.810876] ? mas_walk+0x5c7/0x7c0 [ 35.811350] do_vmi_munmap+0x1f1/0x2b0 [ 35.811853] mmap_region+0x1f9/0x2660 [ 35.812347] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.812860] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.813585] ? __pfx_lock_acquire+0x10/0x10 [ 35.814117] ? __pfx_mmap_region+0x10/0x10 [ 35.814652] ? security_mmap_addr+0x7d/0xa0 [ 35.815185] ? get_unmapped_area+0x1f5/0x3f0 [ 35.815740] do_mmap+0x854/0xf00 [ 35.816201] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.816713] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.817284] ksys_mmap_pgoff+0x3af/0x500 [ 35.817803] do_syscall_64+0x3f/0x90 [ 35.818284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.818934] RIP: 0033:0x7f887e610d82 [ 35.819401] 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 [ 35.821544] RSP: 002b:00007ffe7c59ba88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.822477] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f887e610d82 [ 35.823450] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f887da4a000 [ 35.824343] RBP: 00007f887da4a000 R08: 0000000000000009 R09: 0000000000001000 [ 35.825194] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b58801eb20 [ 35.826048] R13: 00007ffe7c59baa0 R14: 00007ffe7c59bad0 R15: 00007ffe7c59be30 [ 35.826923] [ 35.827222] [ 35.827441] Allocated by task 217: [ 35.827877] kasan_save_stack+0x22/0x50 [ 35.828396] kasan_set_track+0x25/0x30 [ 35.828893] __kasan_slab_alloc+0x59/0x70 [ 35.829426] kmem_cache_alloc+0x16b/0x370 [ 35.829960] vm_area_dup+0x20/0x160 [ 35.830418] __split_vma+0x170/0x950 [ 35.830896] split_vma+0xc6/0x110 [ 35.831338] mprotect_fixup+0x8d2/0xb30 [ 35.831841] do_mprotect_pkey+0x87e/0xd40 [ 35.832376] __x64_sys_mprotect+0x78/0xc0 [ 35.832905] do_syscall_64+0x3f/0x90 [ 35.833384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.834038] [ 35.834257] Freed by task 217: [ 35.834656] kasan_save_stack+0x22/0x50 [ 35.835166] kasan_set_track+0x25/0x30 [ 35.835673] kasan_save_free_info+0x2b/0x50 [ 35.836342] __kasan_slab_free+0x10a/0x190 [ 35.836995] kmem_cache_free+0x10d/0x4d0 [ 35.837598] rcu_core+0x8c8/0x2860 [ 35.838128] __do_softirq+0x1b7/0x7d4 [ 35.838701] [ 35.838956] Last potentially related work creation: [ 35.839659] kasan_save_stack+0x22/0x50 [ 35.840318] __kasan_record_aux_stack+0x8e/0xa0 [ 35.841088] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.841874] remove_vma+0x139/0x170 [ 35.842424] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.843102] do_vmi_munmap+0x1f1/0x2b0 [ 35.843692] __vm_munmap+0x138/0x3a0 [ 35.844279] __x64_sys_munmap+0x59/0x80 [ 35.844894] do_syscall_64+0x3f/0x90 [ 35.845473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.846275] [ 35.846540] The buggy address belongs to the object at ffff888019882bc8 [ 35.846540] which belongs to the cache vm_area_struct of size 168 [ 35.848348] The buggy address is located 88 bytes inside of [ 35.848348] freed 168-byte region [ffff888019882bc8, ffff888019882c70) [ 35.850083] [ 35.850348] The buggy address belongs to the physical page: [ 35.851167] page:0000000029a7f77f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19882 [ 35.852503] memcg:ffff88800f179a01 [ 35.852936] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.853602] page_type: 0xffffffff() [ 35.854059] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.854983] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f179a01 [ 35.855926] page dumped because: kasan: bad access detected [ 35.856594] [ 35.856821] Memory state around the buggy address: [ 35.857396] ffff888019882b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.858258] ffff888019882b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 35.859115] >ffff888019882c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.859974] ^ [ 35.860529] ffff888019882c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.861394] ffff888019882d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.862241] ================================================================== [ 35.863270] Disabling lock debugging due to kernel taint [ 37.923814] BUG: Bad rss-counter state mm:00000000dbdfc158 type:MM_FILEPAGES val:33 [ 37.924985] BUG: Bad rss-counter state mm:00000000dbdfc158 type:MM_ANONPAGES val:22 [ 38.375906] BUG: Bad rss-counter state mm:0000000028b83d5d type:MM_FILEPAGES val:33 [ 38.377132] BUG: Bad rss-counter state mm:0000000028b83d5d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46411' (ECDSA) to the list of known hosts. 2023/06/19 11:58:48 fuzzer started 2023/06/19 11:58:48 dialing manager at localhost:44161 2023/06/19 11:58:48 checking machine... 2023/06/19 11:58:48 checking revisions... [ 39.033428] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:58:48 testing simple program... [ 39.084869] cgroup: Unknown subsys name 'net' [ 39.137159] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:58:47 Registers: info registers vcpu 0 RAX=00007f3265e0f510 RBX=00007ffe424332f0 RCX=00007ffe42433238 RDX=0000000000000015 RSI=000000000000002c RDI=00007f3266615060 RBP=00007ffe42433420 RSP=00007ffe42433190 R8 =000055b8398508b0 R9 =00007ffe42433320 R10=000000000000002c R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=00007f32665fe9de RFL=00000202 [-------] 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 00007f3265a73900 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=00007f3265e0f3ec CR3=0000000019668000 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=ffffffff8180995d RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09e01 RSI=ffff88806cf09e28 RDI=ffff88806cf09e28 RBP=ffff88806cf09af0 RSP=ffff88806cf09a20 R8 =ffffffff861375e4 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e30 R15=ffff88806cf09a98 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 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=00007f2c71ccd670 CR3=000000000e4de000 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=38353a3131203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3333325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343631 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000