syzkaller login: [ 31.575659] BUG: Bad rss-counter state mm:000000001165073c type:MM_FILEPAGES val:33 [ 31.577286] BUG: Bad rss-counter state mm:000000001165073c type:MM_ANONPAGES val:22 [ 31.617550] ================================================================== [ 31.618488] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.619440] Read of size 8 at addr ffff88800f2f9c20 by task sshd/220 [ 31.620266] [ 31.620513] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.621477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.622584] Call Trace: [ 31.622951] [ 31.623283] dump_stack_lvl+0x91/0xf0 [ 31.623825] print_report+0xcc/0x620 [ 31.624358] ? __virt_addr_valid+0x102/0x340 [ 31.624977] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.625655] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.626341] kasan_report+0xbe/0xf0 [ 31.626881] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.627578] vma_interval_tree_remove+0xc75/0xec0 [ 31.628251] vma_prepare+0xc54/0x11a0 [ 31.628769] __split_vma+0x5af/0x950 [ 31.629279] ? __pfx___split_vma+0x10/0x10 [ 31.629839] ? find_held_lock+0x2c/0x110 [ 31.630399] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.630998] ? lock_is_held_type+0x9f/0x120 [ 31.631591] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.632232] ? mtree_range_walk+0x632/0x900 [ 31.632823] ? mas_walk+0x5c7/0x7c0 [ 31.633332] do_vmi_munmap+0x1f1/0x2b0 [ 31.633855] mmap_region+0x1f9/0x2660 [ 31.634365] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.634908] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.635675] ? __pfx_lock_acquire+0x10/0x10 [ 31.636244] ? __pfx_mmap_region+0x10/0x10 [ 31.636807] ? security_mmap_addr+0x7d/0xa0 [ 31.637370] ? get_unmapped_area+0x1f5/0x3f0 [ 31.637964] do_mmap+0x854/0xf00 [ 31.638436] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.638977] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.639582] ksys_mmap_pgoff+0x3af/0x500 [ 31.640123] do_syscall_64+0x3f/0x90 [ 31.640645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.641339] RIP: 0033:0x7f271b698d82 [ 31.641840] 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 [ 31.644119] RSP: 002b:00007ffce1dea348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.645212] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f271b698d82 [ 31.646122] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f271aad2000 [ 31.647085] RBP: 00007f271aad2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.648011] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f6adb2b20 [ 31.648951] R13: 00007ffce1dea360 R14: 00007ffce1dea390 R15: 00007ffce1dea6f0 [ 31.649913] [ 31.650239] [ 31.650481] Allocated by task 213: [ 31.650962] kasan_save_stack+0x22/0x50 [ 31.651550] kasan_set_track+0x25/0x30 [ 31.652110] __kasan_slab_alloc+0x59/0x70 [ 31.652699] kmem_cache_alloc+0x16b/0x370 [ 31.653291] vm_area_dup+0x20/0x160 [ 31.653807] __split_vma+0x170/0x950 [ 31.654337] split_vma+0xc6/0x110 [ 31.654828] mprotect_fixup+0x8d2/0xb30 [ 31.655399] do_mprotect_pkey+0x87e/0xd40 [ 31.655988] __x64_sys_mprotect+0x78/0xc0 [ 31.656577] do_syscall_64+0x3f/0x90 [ 31.657115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.657839] [ 31.658058] Freed by task 213: [ 31.658449] kasan_save_stack+0x22/0x50 [ 31.658950] kasan_set_track+0x25/0x30 [ 31.659457] kasan_save_free_info+0x2b/0x50 [ 31.659989] __kasan_slab_free+0x10a/0x190 [ 31.660519] kmem_cache_free+0x10d/0x4d0 [ 31.661029] rcu_core+0x8c8/0x2860 [ 31.661479] __do_softirq+0x1b7/0x7d4 [ 31.661954] [ 31.662166] Last potentially related work creation: [ 31.662749] kasan_save_stack+0x22/0x50 [ 31.663264] __kasan_record_aux_stack+0x8e/0xa0 [ 31.663835] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.664473] remove_vma+0x139/0x170 [ 31.664917] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.665464] do_vmi_munmap+0x1f1/0x2b0 [ 31.665947] __vm_munmap+0x138/0x3a0 [ 31.666412] __x64_sys_munmap+0x59/0x80 [ 31.666905] do_syscall_64+0x3f/0x90 [ 31.667379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.668016] [ 31.668231] The buggy address belongs to the object at ffff88800f2f9bc8 [ 31.668231] which belongs to the cache vm_area_struct of size 168 [ 31.669689] The buggy address is located 88 bytes inside of [ 31.669689] freed 168-byte region [ffff88800f2f9bc8, ffff88800f2f9c70) [ 31.671084] [ 31.671297] The buggy address belongs to the physical page: [ 31.671950] page:000000006766a7c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2f9 [ 31.673022] memcg:ffff88801628bc01 [ 31.673447] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.674091] page_type: 0xffffffff() [ 31.674535] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.675460] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801628bc01 [ 31.676353] page dumped because: kasan: bad access detected [ 31.677014] [ 31.677228] Memory state around the buggy address: [ 31.677804] ffff88800f2f9b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.678655] ffff88800f2f9b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.679506] >ffff88800f2f9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.680352] ^ [ 31.680874] ffff88800f2f9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.681722] ffff88800f2f9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.682567] ================================================================== [ 31.684017] Disabling lock debugging due to kernel taint [ 33.509930] BUG: Bad rss-counter state mm:0000000061c27d0e type:MM_FILEPAGES val:33 [ 33.511549] BUG: Bad rss-counter state mm:0000000061c27d0e type:MM_ANONPAGES val:22 [ 34.058627] BUG: Bad rss-counter state mm:000000008007011c type:MM_FILEPAGES val:33 [ 34.059660] BUG: Bad rss-counter state mm:000000008007011c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46422' (ECDSA) to the list of known hosts. 2023/06/21 06:50:55 fuzzer started 2023/06/21 06:50:55 dialing manager at localhost:36067 2023/06/21 06:50:55 checking machine... 2023/06/21 06:50:55 checking revisions... [ 34.682141] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:50:55 testing simple program... [ 34.729566] cgroup: Unknown subsys name 'net' [ 34.784905] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:50:55 Registers: info registers vcpu 0 RAX=ffffffff83650bdf RBX=ffffffff85fa6b90 RCX=ffffffff83650bf7 RDX=0000000000000000 RSI=ffffffff863b5f8a RDI=ffffffff85fa6b70 RBP=ffffffff85fa6b90 RSP=ffff888019f178e8 R8 =ffffffff863b5f8a R9 =ffff888019f179e0 R10=0000000000038001 R11=000000000008b06b R12=ffffffff85fa6b90 R13=ffffffff85fa6b70 R14=ffffffff85fa6b8c R15=dffffc0000000000 RIP=ffffffff8112fc99 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 00007fc728700900 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=00007ffebe8e7000 CR3=000000001a0f6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=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=00007f29f9eda3e0 CR3=000000000cb38000 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=b95065a1d9cecba74744a80985a5bf92 XMM02=000000000011d9d0ec2efd57dc4c00df XMM03=0000000000122170b14d6070300a89ab XMM04=40efb39d0b06580900000000000ae988 XMM05=fd294ce164239e7d0000000000132d80 XMM06=4fda316b135da52b0000000000131e20 XMM07=e042d86d42eb936e00000000001223f0 XMM08=b14d6070300a89ab000000000011da30 XMM09=00000000000000000000000000000000 XMM10=20202020002020202020000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000