syzkaller login: [ 38.750383] BUG: Bad rss-counter state mm:00000000ec6681b5 type:MM_FILEPAGES val:33 [ 38.751411] BUG: Bad rss-counter state mm:00000000ec6681b5 type:MM_ANONPAGES val:22 [ 38.915654] ================================================================== [ 38.916758] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.917874] Read of size 8 at addr ffff88800dbfe228 by task sshd/219 [ 38.918970] [ 38.919227] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.920243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.921355] Call Trace: [ 38.921679] [ 38.921967] dump_stack_lvl+0x91/0xf0 [ 38.922460] print_report+0xcc/0x620 [ 38.922948] ? __virt_addr_valid+0x102/0x340 [ 38.923501] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.924124] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.924739] kasan_report+0xbe/0xf0 [ 38.925215] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.925847] vma_interval_tree_remove+0xc75/0xec0 [ 38.926450] vma_prepare+0xc54/0x11a0 [ 38.926929] __split_vma+0x5af/0x950 [ 38.927402] ? __pfx___split_vma+0x10/0x10 [ 38.927932] ? find_held_lock+0x2c/0x110 [ 38.928454] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.929019] ? lock_is_held_type+0x9f/0x120 [ 38.929581] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.930192] ? mtree_range_walk+0x632/0x900 [ 38.930751] ? mas_walk+0x5c7/0x7c0 [ 38.931233] do_vmi_munmap+0x1f1/0x2b0 [ 38.931726] mmap_region+0x1f9/0x2660 [ 38.932218] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.932733] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.933494] ? __pfx_lock_acquire+0x10/0x10 [ 38.934027] ? __pfx_mmap_region+0x10/0x10 [ 38.934557] ? security_mmap_addr+0x7d/0xa0 [ 38.935119] ? get_unmapped_area+0x1f5/0x3f0 [ 38.935688] do_mmap+0x854/0xf00 [ 38.936132] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.936633] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.937201] ksys_mmap_pgoff+0x3af/0x500 [ 38.937718] do_syscall_64+0x3f/0x90 [ 38.938209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938852] RIP: 0033:0x7f455a787d82 [ 38.939314] 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 [ 38.941470] RSP: 002b:00007ffc849e87c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.942375] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f455a787d82 [ 38.943222] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4559bc1000 [ 38.944068] RBP: 00007f4559bc1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.944912] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b9c69af70 [ 38.945760] R13: 00007ffc849e87e0 R14: 00007ffc849e8810 R15: 00007ffc849e8b70 [ 38.946604] [ 38.946898] [ 38.947118] Allocated by task 212: [ 38.947555] kasan_save_stack+0x22/0x50 [ 38.948064] kasan_set_track+0x25/0x30 [ 38.948553] __kasan_slab_alloc+0x59/0x70 [ 38.949070] kmem_cache_alloc+0x16b/0x370 [ 38.949621] vm_area_dup+0x20/0x160 [ 38.950079] __split_vma+0x170/0x950 [ 38.950552] split_vma+0xc6/0x110 [ 38.950997] mprotect_fixup+0x8d2/0xb30 [ 38.951499] do_mprotect_pkey+0x87e/0xd40 [ 38.952023] __x64_sys_mprotect+0x78/0xc0 [ 38.952550] do_syscall_64+0x3f/0x90 [ 38.953024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953692] [ 38.953912] Freed by task 212: [ 38.954307] kasan_save_stack+0x22/0x50 [ 38.954810] kasan_set_track+0x25/0x30 [ 38.955303] kasan_save_free_info+0x2b/0x50 [ 38.955829] __kasan_slab_free+0x10a/0x190 [ 38.956360] kmem_cache_free+0x10d/0x4d0 [ 38.956866] rcu_core+0x8c8/0x2860 [ 38.957321] __do_softirq+0x1b7/0x7d4 [ 38.957794] [ 38.958012] Last potentially related work creation: [ 38.958597] kasan_save_stack+0x22/0x50 [ 38.959100] __kasan_record_aux_stack+0x8e/0xa0 [ 38.959802] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.960453] remove_vma+0x139/0x170 [ 38.960908] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.961480] do_vmi_munmap+0x1f1/0x2b0 [ 38.961966] __vm_munmap+0x138/0x3a0 [ 38.962433] __x64_sys_munmap+0x59/0x80 [ 38.962930] do_syscall_64+0x3f/0x90 [ 38.963403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.964049] [ 38.964263] Second to last potentially related work creation: [ 38.964941] kasan_save_stack+0x22/0x50 [ 38.965452] __kasan_record_aux_stack+0x8e/0xa0 [ 38.966028] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.966673] remove_vma+0x139/0x170 [ 38.967134] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.967701] do_vmi_munmap+0x1f1/0x2b0 [ 38.968185] __vm_munmap+0x138/0x3a0 [ 38.968657] __x64_sys_munmap+0x59/0x80 [ 38.969159] do_syscall_64+0x3f/0x90 [ 38.969663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.970305] [ 38.970519] The buggy address belongs to the object at ffff88800dbfe1d0 [ 38.970519] which belongs to the cache vm_area_struct of size 168 [ 38.971994] The buggy address is located 88 bytes inside of [ 38.971994] freed 168-byte region [ffff88800dbfe1d0, ffff88800dbfe278) [ 38.973415] [ 38.973633] The buggy address belongs to the physical page: [ 38.974294] page:000000009874d802 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbfe [ 38.975373] memcg:ffff88800fff1201 [ 38.975803] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.976457] page_type: 0xffffffff() [ 38.976907] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.977841] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fff1201 [ 38.978748] page dumped because: kasan: bad access detected [ 38.979410] [ 38.979624] Memory state around the buggy address: [ 38.980205] ffff88800dbfe100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.981063] ffff88800dbfe180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.981930] >ffff88800dbfe200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.982781] ^ [ 38.983340] ffff88800dbfe280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.984209] ffff88800dbfe300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.985057] ================================================================== [ 38.986088] Disabling lock debugging due to kernel taint [ 41.405433] BUG: Bad rss-counter state mm:00000000a58f2a6f type:MM_FILEPAGES val:33 [ 41.406605] BUG: Bad rss-counter state mm:00000000a58f2a6f type:MM_ANONPAGES val:22 [ 41.977994] BUG: Bad rss-counter state mm:00000000466084d8 type:MM_FILEPAGES val:33 [ 41.979152] BUG: Bad rss-counter state mm:00000000466084d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5965' (ECDSA) to the list of known hosts. 2023/06/21 02:13:36 fuzzer started 2023/06/21 02:13:37 dialing manager at localhost:36067 2023/06/21 02:13:37 checking machine... 2023/06/21 02:13:37 checking revisions... [ 42.599946] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:13:37 testing simple program... [ 42.662373] cgroup: Unknown subsys name 'net' [ 42.747681] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:13:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000000e RCX=0000000000000000 RDX=ffff8880145051c0 RSI=000000000000000e RDI=ffff8880102c6798 RBP=ffff88800f42c8e8 RSP=ffff88800d017530 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000000e R11=0000000000000001 R12=ffff88800f42c000 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff844fe8f4 RFL=00000293 [--S-A-C] 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 00007fe80a33b900 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=00007fa9c13a1650 CR3=000000000d642000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=765c162914fd8b3900000000000ae988 XMM05=d9dd4fd9b1d07e3f00000000001339e8 XMM06=806171799158d9670000000000132468 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fff83a71e08 CR3=000000000e748000 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=2036333a33313a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a33313a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000