syzkaller login: [ 40.988604] BUG: Bad rss-counter state mm:000000005b22e07a type:MM_FILEPAGES val:31 [ 40.990617] BUG: Bad rss-counter state mm:000000005b22e07a type:MM_ANONPAGES val:22 [ 41.158408] ================================================================== [ 41.159338] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.160313] Read of size 8 at addr ffff88800e551880 by task sshd/220 [ 41.161064] [ 41.161279] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.162264] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.163302] Call Trace: [ 41.163625] [ 41.163917] dump_stack_lvl+0x91/0xf0 [ 41.164425] print_report+0xcc/0x620 [ 41.164926] ? __virt_addr_valid+0x102/0x340 [ 41.165493] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.166124] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.166760] kasan_report+0xbe/0xf0 [ 41.167256] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.167893] vma_interval_tree_remove+0xc75/0xec0 [ 41.168521] vma_prepare+0xc54/0x11a0 [ 41.169013] __split_vma+0x5af/0x950 [ 41.169495] ? __pfx___split_vma+0x10/0x10 [ 41.170039] ? find_held_lock+0x2c/0x110 [ 41.170576] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.171167] ? lock_is_held_type+0x9f/0x120 [ 41.171717] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.172338] ? mtree_range_walk+0x632/0x900 [ 41.172905] ? mas_walk+0x5c7/0x7c0 [ 41.173392] do_vmi_munmap+0x1f1/0x2b0 [ 41.173892] mmap_region+0x1f9/0x2660 [ 41.174390] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.174937] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.175671] ? __pfx_lock_acquire+0x10/0x10 [ 41.176265] ? __pfx_mmap_region+0x10/0x10 [ 41.176825] ? security_mmap_addr+0x7d/0xa0 [ 41.177385] ? get_unmapped_area+0x1f5/0x3f0 [ 41.177952] do_mmap+0x854/0xf00 [ 41.178404] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.178927] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.179501] ksys_mmap_pgoff+0x3af/0x500 [ 41.180016] do_syscall_64+0x3f/0x90 [ 41.180511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.181170] RIP: 0033:0x7f3098fe7d82 [ 41.181634] 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 [ 41.183834] RSP: 002b:00007ffecb107228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.184777] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3098fe7d82 [ 41.185653] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3098421000 [ 41.186522] RBP: 00007f3098421000 R08: 0000000000000009 R09: 0000000000001000 [ 41.187401] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f961725f70 [ 41.188282] R13: 00007ffecb107240 R14: 00007ffecb107270 R15: 00007ffecb1075d0 [ 41.189137] [ 41.189426] [ 41.189636] Allocated by task 213: [ 41.190063] kasan_save_stack+0x22/0x50 [ 41.190567] kasan_set_track+0x25/0x30 [ 41.191063] __kasan_slab_alloc+0x59/0x70 [ 41.191579] kmem_cache_alloc+0x16b/0x370 [ 41.192102] vm_area_dup+0x20/0x160 [ 41.192558] __split_vma+0x170/0x950 [ 41.193016] split_vma+0xc6/0x110 [ 41.193457] mprotect_fixup+0x8d2/0xb30 [ 41.193954] do_mprotect_pkey+0x87e/0xd40 [ 41.194473] __x64_sys_mprotect+0x78/0xc0 [ 41.195002] do_syscall_64+0x3f/0x90 [ 41.195473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.196108] [ 41.196321] Freed by task 213: [ 41.196713] kasan_save_stack+0x22/0x50 [ 41.197209] kasan_set_track+0x25/0x30 [ 41.197697] kasan_save_free_info+0x2b/0x50 [ 41.198225] __kasan_slab_free+0x10a/0x190 [ 41.198753] kmem_cache_free+0x10d/0x4d0 [ 41.199259] rcu_core+0x8c8/0x2860 [ 41.199709] __do_softirq+0x1b7/0x7d4 [ 41.200195] [ 41.200475] Last potentially related work creation: [ 41.201246] kasan_save_stack+0x22/0x50 [ 41.201902] __kasan_record_aux_stack+0x8e/0xa0 [ 41.202645] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.203509] remove_vma+0x139/0x170 [ 41.204105] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.204824] do_vmi_munmap+0x1f1/0x2b0 [ 41.205456] __vm_munmap+0x138/0x3a0 [ 41.205928] __x64_sys_munmap+0x59/0x80 [ 41.206432] do_syscall_64+0x3f/0x90 [ 41.206903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.207565] [ 41.207779] The buggy address belongs to the object at ffff88800e551828 [ 41.207779] which belongs to the cache vm_area_struct of size 168 [ 41.209304] The buggy address is located 88 bytes inside of [ 41.209304] freed 168-byte region [ffff88800e551828, ffff88800e5518d0) [ 41.210802] [ 41.211032] The buggy address belongs to the physical page: [ 41.211693] page:000000000ec08343 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe551 [ 41.212778] memcg:ffff88800e552001 [ 41.213202] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.213840] page_type: 0xffffffff() [ 41.214288] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.215218] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e552001 [ 41.216117] page dumped because: kasan: bad access detected [ 41.216772] [ 41.216987] Memory state around the buggy address: [ 41.217571] ffff88800e551780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 41.218418] ffff88800e551800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.219278] >ffff88800e551880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.220120] ^ [ 41.220553] ffff88800e551900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.221409] ffff88800e551980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 41.222291] ================================================================== [ 41.223305] Disabling lock debugging due to kernel taint [ 43.392786] BUG: Bad rss-counter state mm:00000000189f3d92 type:MM_FILEPAGES val:33 [ 43.393841] BUG: Bad rss-counter state mm:00000000189f3d92 type:MM_ANONPAGES val:22 [ 43.853555] BUG: Bad rss-counter state mm:00000000ba7a633f type:MM_FILEPAGES val:33 [ 43.854506] BUG: Bad rss-counter state mm:00000000ba7a633f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35670' (ECDSA) to the list of known hosts. 2023/06/20 03:56:43 fuzzer started 2023/06/20 03:56:43 dialing manager at localhost:44161 2023/06/20 03:56:43 checking machine... 2023/06/20 03:56:43 checking revisions... [ 44.553238] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:56:43 testing simple program... [ 44.601838] cgroup: Unknown subsys name 'net' [ 44.639499] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:56:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000400 RCX=00007ffe7508f2c0 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000003 RSP=00007ffe7508f310 R8 =0000000000000003 R9 =0000000000000001 R10=00007feab65e7ac0 R11=0000000000000202 R12=000055b38e5e1740 R13=000055b38e5d0ce0 R14=00007feab60826f8 R15=00007ffe7508f328 RIP=00007feab6badd11 RFL=00000246 [---Z-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 00007feab6082900 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=00007feab663a0b0 CR3=000000001667c000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fcc00614e20 CR3=000000000ec50000 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=2a037fec4c7be3bc8b41ecc0b04f913f XMM02=000000000011c3b8ec2efd57dc4c00df XMM03=000000000012393021f2e50285a1165f XMM04=de511e6a6db070df00000000000ae988 XMM05=d0f35b44bdc12d1b0000000000134260 XMM06=4fda316b135da52b0000000000133300 XMM07=e042d86d42eb936e0000000000123bb0 XMM08=21f2e50285a1165f000000000011c418 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000