syzkaller login: [ 31.187224] BUG: Bad rss-counter state mm:00000000e5d28c65 type:MM_FILEPAGES val:33 [ 31.188197] BUG: Bad rss-counter state mm:00000000e5d28c65 type:MM_ANONPAGES val:22 [ 31.357669] ================================================================== [ 31.358584] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.359542] Read of size 8 at addr ffff88800dc853f8 by task sshd/219 [ 31.360312] [ 31.360529] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.361503] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.362493] Call Trace: [ 31.362813] [ 31.363144] dump_stack_lvl+0x91/0xf0 [ 31.363664] print_report+0xcc/0x620 [ 31.364151] ? __virt_addr_valid+0x102/0x340 [ 31.364722] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.365346] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.365981] kasan_report+0xbe/0xf0 [ 31.366455] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.367096] vma_interval_tree_remove+0xc75/0xec0 [ 31.367712] vma_prepare+0xc54/0x11a0 [ 31.368195] __split_vma+0x5af/0x950 [ 31.368670] ? __pfx___split_vma+0x10/0x10 [ 31.369206] ? find_held_lock+0x2c/0x110 [ 31.369734] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.370304] ? lock_is_held_type+0x9f/0x120 [ 31.370853] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.371465] ? mtree_range_walk+0x632/0x900 [ 31.372049] ? mas_walk+0x5c7/0x7c0 [ 31.372525] do_vmi_munmap+0x1f1/0x2b0 [ 31.373033] mmap_region+0x1f9/0x2660 [ 31.373515] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.374030] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.374741] ? __pfx_lock_acquire+0x10/0x10 [ 31.375281] ? __pfx_mmap_region+0x10/0x10 [ 31.375843] ? security_mmap_addr+0x7d/0xa0 [ 31.376376] ? get_unmapped_area+0x1f5/0x3f0 [ 31.376940] do_mmap+0x854/0xf00 [ 31.377389] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.377884] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.378461] ksys_mmap_pgoff+0x3af/0x500 [ 31.378973] do_syscall_64+0x3f/0x90 [ 31.379462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.380135] RIP: 0033:0x7f0bdea09d82 [ 31.380597] 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 [ 31.382728] RSP: 002b:00007ffc6959efe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.383655] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0bdea09d82 [ 31.384508] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0bdde43000 [ 31.385358] RBP: 00007f0bdde43000 R08: 0000000000000009 R09: 0000000000001000 [ 31.386213] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6b73a4f70 [ 31.387089] R13: 00007ffc6959f000 R14: 00007ffc6959f030 R15: 00007ffc6959f390 [ 31.387966] [ 31.388261] [ 31.388480] Allocated by task 212: [ 31.388920] kasan_save_stack+0x22/0x50 [ 31.389424] kasan_set_track+0x25/0x30 [ 31.389932] __kasan_slab_alloc+0x59/0x70 [ 31.390465] kmem_cache_alloc+0x16b/0x370 [ 31.390981] vm_area_dup+0x20/0x160 [ 31.391440] __split_vma+0x170/0x950 [ 31.391924] split_vma+0xc6/0x110 [ 31.392375] mprotect_fixup+0x8d2/0xb30 [ 31.392881] do_mprotect_pkey+0x87e/0xd40 [ 31.393404] __x64_sys_mprotect+0x78/0xc0 [ 31.393936] do_syscall_64+0x3f/0x90 [ 31.394415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.395067] [ 31.395281] Freed by task 212: [ 31.395688] kasan_save_stack+0x22/0x50 [ 31.396191] kasan_set_track+0x25/0x30 [ 31.396685] kasan_save_free_info+0x2b/0x50 [ 31.397221] __kasan_slab_free+0x10a/0x190 [ 31.397758] kmem_cache_free+0x10d/0x4d0 [ 31.398264] rcu_core+0x8c8/0x2860 [ 31.398707] __do_softirq+0x1b7/0x7d4 [ 31.399186] [ 31.399399] Last potentially related work creation: [ 31.400002] kasan_save_stack+0x22/0x50 [ 31.400505] __kasan_record_aux_stack+0x8e/0xa0 [ 31.401092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.401737] remove_vma+0x139/0x170 [ 31.402188] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.402745] do_vmi_munmap+0x1f1/0x2b0 [ 31.403234] __vm_munmap+0x138/0x3a0 [ 31.403716] __x64_sys_munmap+0x59/0x80 [ 31.404226] do_syscall_64+0x3f/0x90 [ 31.404705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.405350] [ 31.405567] The buggy address belongs to the object at ffff88800dc853a0 [ 31.405567] which belongs to the cache vm_area_struct of size 168 [ 31.407046] The buggy address is located 88 bytes inside of [ 31.407046] freed 168-byte region [ffff88800dc853a0, ffff88800dc85448) [ 31.408471] [ 31.408694] The buggy address belongs to the physical page: [ 31.409354] page:00000000542c8ff1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc85 [ 31.410446] memcg:ffff88800d076601 [ 31.410878] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.411544] page_type: 0xffffffff() [ 31.412017] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.412952] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d076601 [ 31.413874] page dumped because: kasan: bad access detected [ 31.414547] [ 31.414768] Memory state around the buggy address: [ 31.415368] ffff88800dc85280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.416266] ffff88800dc85300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.417148] >ffff88800dc85380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.418013] ^ [ 31.418878] ffff88800dc85400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.419759] ffff88800dc85480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.420630] ================================================================== [ 31.421624] Disabling lock debugging due to kernel taint [ 33.901876] BUG: Bad rss-counter state mm:0000000022f01123 type:MM_FILEPAGES val:33 [ 33.902617] BUG: Bad rss-counter state mm:0000000022f01123 type:MM_ANONPAGES val:22 [ 34.329819] BUG: Bad rss-counter state mm:00000000136f2276 type:MM_FILEPAGES val:33 [ 34.330849] BUG: Bad rss-counter state mm:00000000136f2276 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28630' (ECDSA) to the list of known hosts. 2023/06/20 17:29:57 fuzzer started 2023/06/20 17:29:57 dialing manager at localhost:36067 2023/06/20 17:29:57 checking machine... 2023/06/20 17:29:57 checking revisions... [ 35.016098] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:29:57 testing simple program... [ 35.054318] cgroup: Unknown subsys name 'net' [ 35.094822] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:29:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81f59cad RDX=000000000000f59c RSI=000000000000f59c RDI=ffffffff86527060 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000003aa1f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007f292c1d7900 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=00007f292b60a3f0 CR3=000000000c4ee000 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=dbd5e009f0daf3ab6a417e462d0a3804 XMM02=000000000011da10eff9b2d0a8fce9cb XMM03=000000000011dae02c67c8bc2e329bc3 XMM04=3cb7fc5e5791deae00000000000ae988 XMM05=c0d41b53eef669cb0000000000134840 XMM06=806171799158d9670000000000133630 XMM07=fb795ef6d65770560000000000124020 XMM08=2c67c8bc2e329bc3000000000011da80 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856d84a0 RCX=ffffffff812e0135 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88801869f628 RBP=1ffff110030d3ec1 RSP=ffff88801869f600 R8 =0000000000000001 R9 =ffffed10030d3ec5 R10=0000000000000003 R11=00000000000b6a61 R12=ffffffff856d84a8 R13=ffffffff856d84b0 R14=ffff88800e2503d8 R15=ffff88800e250390 RIP=ffffffff812e0146 RFL=00000046 [---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 00007fb895b5c900 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=00007fff6f124000 CR3=000000000ec84000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000