syzkaller login: [ 30.624829] BUG: Bad rss-counter state mm:00000000a155cecf type:MM_FILEPAGES val:33 [ 30.626515] BUG: Bad rss-counter state mm:00000000a155cecf type:MM_ANONPAGES val:22 [ 30.798712] ================================================================== [ 30.799775] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.800869] Read of size 8 at addr ffff888015a3dc20 by task sshd/220 [ 30.801877] [ 30.802108] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.802945] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.803909] Call Trace: [ 30.804220] [ 30.804495] dump_stack_lvl+0x91/0xf0 [ 30.804970] print_report+0xcc/0x620 [ 30.805442] ? __virt_addr_valid+0x102/0x340 [ 30.805977] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.806574] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.807178] kasan_report+0xbe/0xf0 [ 30.807647] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.808244] vma_interval_tree_remove+0xc75/0xec0 [ 30.808829] vma_prepare+0xc54/0x11a0 [ 30.809292] __split_vma+0x5af/0x950 [ 30.809747] ? __pfx___split_vma+0x10/0x10 [ 30.810260] ? find_held_lock+0x2c/0x110 [ 30.810763] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.811306] ? lock_is_held_type+0x9f/0x120 [ 30.811850] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.812441] ? mtree_range_walk+0x632/0x900 [ 30.812976] ? mas_walk+0x5c7/0x7c0 [ 30.813440] do_vmi_munmap+0x1f1/0x2b0 [ 30.813919] mmap_region+0x1f9/0x2660 [ 30.814389] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.814882] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.815582] ? __pfx_lock_acquire+0x10/0x10 [ 30.816111] ? __pfx_mmap_region+0x10/0x10 [ 30.816622] ? security_mmap_addr+0x7d/0xa0 [ 30.817136] ? get_unmapped_area+0x1f5/0x3f0 [ 30.817781] do_mmap+0x854/0xf00 [ 30.818218] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.818711] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.819263] ksys_mmap_pgoff+0x3af/0x500 [ 30.819800] do_syscall_64+0x3f/0x90 [ 30.820275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.820912] RIP: 0033:0x7f0fb797fd82 [ 30.821367] 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 [ 30.823490] RSP: 002b:00007ffe6e6056c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.824388] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0fb797fd82 [ 30.825228] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0fb6db9000 [ 30.826093] RBP: 00007f0fb6db9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.827024] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f685892ec0 [ 30.827937] R13: 00007ffe6e6056e0 R14: 00007ffe6e605710 R15: 00007ffe6e605a70 [ 30.828810] [ 30.829115] [ 30.829335] Allocated by task 213: [ 30.829778] kasan_save_stack+0x22/0x50 [ 30.830284] kasan_set_track+0x25/0x30 [ 30.830778] __kasan_slab_alloc+0x59/0x70 [ 30.831303] kmem_cache_alloc+0x16b/0x370 [ 30.831875] vm_area_dup+0x20/0x160 [ 30.832331] __split_vma+0x170/0x950 [ 30.832802] split_vma+0xc6/0x110 [ 30.833249] mprotect_fixup+0x8d2/0xb30 [ 30.833763] do_mprotect_pkey+0x87e/0xd40 [ 30.834290] __x64_sys_mprotect+0x78/0xc0 [ 30.834809] do_syscall_64+0x3f/0x90 [ 30.835286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.835964] [ 30.836180] Freed by task 203: [ 30.836570] kasan_save_stack+0x22/0x50 [ 30.837072] kasan_set_track+0x25/0x30 [ 30.837563] kasan_save_free_info+0x2b/0x50 [ 30.838097] __kasan_slab_free+0x10a/0x190 [ 30.838628] kmem_cache_free+0x10d/0x4d0 [ 30.839138] rcu_core+0x8c8/0x2860 [ 30.839635] __do_softirq+0x1b7/0x7d4 [ 30.840119] [ 30.840336] Last potentially related work creation: [ 30.840916] kasan_save_stack+0x22/0x50 [ 30.841424] __kasan_record_aux_stack+0x8e/0xa0 [ 30.842001] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.842646] remove_vma+0x139/0x170 [ 30.843096] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.843698] do_vmi_munmap+0x1f1/0x2b0 [ 30.844196] __vm_munmap+0x138/0x3a0 [ 30.844659] __x64_sys_munmap+0x59/0x80 [ 30.845155] do_syscall_64+0x3f/0x90 [ 30.845634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.846276] [ 30.846494] The buggy address belongs to the object at ffff888015a3dbc8 [ 30.846494] which belongs to the cache vm_area_struct of size 168 [ 30.848042] The buggy address is located 88 bytes inside of [ 30.848042] freed 168-byte region [ffff888015a3dbc8, ffff888015a3dc70) [ 30.849475] [ 30.849694] The buggy address belongs to the physical page: [ 30.850357] page:00000000957a0a77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a3d [ 30.851497] memcg:ffff888018241b01 [ 30.851935] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.852577] page_type: 0xffffffff() [ 30.853039] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.853961] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018241b01 [ 30.854872] page dumped because: kasan: bad access detected [ 30.855573] [ 30.855791] Memory state around the buggy address: [ 30.856367] ffff888015a3db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.857215] ffff888015a3db80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.858065] >ffff888015a3dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.858913] ^ [ 30.859482] ffff888015a3dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.860353] ffff888015a3dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.861209] ================================================================== [ 30.862163] Disabling lock debugging due to kernel taint [ 33.665333] BUG: Bad rss-counter state mm:0000000025278795 type:MM_FILEPAGES val:33 [ 33.666295] BUG: Bad rss-counter state mm:0000000025278795 type:MM_ANONPAGES val:22 [ 34.161824] BUG: Bad rss-counter state mm:000000007adb2154 type:MM_FILEPAGES val:33 [ 34.163037] BUG: Bad rss-counter state mm:000000007adb2154 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42672' (ECDSA) to the list of known hosts. 2023/06/21 08:35:14 fuzzer started 2023/06/21 08:35:14 dialing manager at localhost:36067 2023/06/21 08:35:14 checking machine... 2023/06/21 08:35:14 checking revisions... [ 34.870427] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:35:14 testing simple program... [ 34.913583] cgroup: Unknown subsys name 'net' [ 34.979744] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:35:13 Registers: info registers vcpu 0 RAX=0000559faca8a010 RBX=000000000000001e RCX=000000000000002e RDX=0000000000000006 RSI=0000559facac7340 RDI=00000000000001f8 RBP=00000000000001f8 RSP=00007ffe82029170 R8 =0000559facaa98b0 R9 =000000000000001c R10=0000000000000001 R11=0000000000000000 R12=fffffffffffffe28 R13=00007ffe820291e0 R14=0000000000000002 R15=000000000000000a RIP=00007fd0c292720b RFL=00000206 [-----P-] 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 00007fd0c24a9900 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=00007fd0c2a5e650 CR3=000000000ec52000 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=66206465736f6c63206e6f6973736573 XMM01=746f6f72207265737520726f66206465 XMM02=0000000000000000000000ffffffffff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=6f69737365735f6e65706f0000000000 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=ffff888008c04400 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=00007ffdb5bdfec8 CR3=0000000015ac0000 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=2033313a35333a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a35333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000