syzkaller login: [ 33.065714] BUG: Bad rss-counter state mm:00000000612ea972 type:MM_FILEPAGES val:33 [ 33.066793] BUG: Bad rss-counter state mm:00000000612ea972 type:MM_ANONPAGES val:22 [ 33.107422] ================================================================== [ 33.108513] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.109807] Read of size 8 at addr ffff88800f015df0 by task sshd/221 [ 33.110558] [ 33.110800] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.111656] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.112621] Call Trace: [ 33.112946] [ 33.113225] dump_stack_lvl+0x91/0xf0 [ 33.113714] print_report+0xcc/0x620 [ 33.114194] ? __virt_addr_valid+0x102/0x340 [ 33.114761] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.115365] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.115984] kasan_report+0xbe/0xf0 [ 33.116456] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.117096] vma_interval_tree_remove+0xc75/0xec0 [ 33.117721] vma_prepare+0xc54/0x11a0 [ 33.118210] __split_vma+0x5af/0x950 [ 33.118731] ? __pfx___split_vma+0x10/0x10 [ 33.119271] ? find_held_lock+0x2c/0x110 [ 33.119820] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.120396] ? lock_is_held_type+0x9f/0x120 [ 33.120956] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.121687] ? mtree_range_walk+0x632/0x900 [ 33.122443] ? mas_walk+0x5c7/0x7c0 [ 33.123102] do_vmi_munmap+0x1f1/0x2b0 [ 33.123774] mmap_region+0x1f9/0x2660 [ 33.124436] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.125139] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.126114] ? __pfx_lock_acquire+0x10/0x10 [ 33.126855] ? __pfx_mmap_region+0x10/0x10 [ 33.127404] ? security_mmap_addr+0x7d/0xa0 [ 33.127967] ? get_unmapped_area+0x1f5/0x3f0 [ 33.128529] do_mmap+0x854/0xf00 [ 33.128994] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.129500] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.130094] ksys_mmap_pgoff+0x3af/0x500 [ 33.130631] do_syscall_64+0x3f/0x90 [ 33.131124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.131788] RIP: 0033:0x7fa333b8fd82 [ 33.132258] 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 [ 33.134445] RSP: 002b:00007ffdbcbd52b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.135374] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa333b8fd82 [ 33.136249] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa332fc9000 [ 33.137114] RBP: 00007fa332fc9000 R08: 0000000000000009 R09: 0000000000001000 [ 33.137979] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a1a5149ec0 [ 33.138862] R13: 00007ffdbcbd52d0 R14: 00007ffdbcbd5300 R15: 00007ffdbcbd5660 [ 33.139736] [ 33.140034] [ 33.140257] Allocated by task 214: [ 33.140695] kasan_save_stack+0x22/0x50 [ 33.141217] kasan_set_track+0x25/0x30 [ 33.141726] __kasan_slab_alloc+0x59/0x70 [ 33.142261] kmem_cache_alloc+0x16b/0x370 [ 33.142787] vm_area_dup+0x20/0x160 [ 33.143252] __split_vma+0x170/0x950 [ 33.143730] split_vma+0xc6/0x110 [ 33.144180] mprotect_fixup+0x8d2/0xb30 [ 33.144702] do_mprotect_pkey+0x87e/0xd40 [ 33.145237] __x64_sys_mprotect+0x78/0xc0 [ 33.145767] do_syscall_64+0x3f/0x90 [ 33.146257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.146935] [ 33.147156] Freed by task 214: [ 33.147556] kasan_save_stack+0x22/0x50 [ 33.148074] kasan_set_track+0x25/0x30 [ 33.148574] kasan_save_free_info+0x2b/0x50 [ 33.149131] __kasan_slab_free+0x10a/0x190 [ 33.149675] kmem_cache_free+0x10d/0x4d0 [ 33.150204] rcu_core+0x8c8/0x2860 [ 33.150729] __do_softirq+0x1b7/0x7d4 [ 33.151209] [ 33.151431] Last potentially related work creation: [ 33.152019] kasan_save_stack+0x22/0x50 [ 33.152527] __kasan_record_aux_stack+0x8e/0xa0 [ 33.153102] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.153760] remove_vma+0x139/0x170 [ 33.154223] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.154799] do_vmi_munmap+0x1f1/0x2b0 [ 33.155297] __vm_munmap+0x138/0x3a0 [ 33.155775] __x64_sys_munmap+0x59/0x80 [ 33.156291] do_syscall_64+0x3f/0x90 [ 33.156769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.157417] [ 33.157633] The buggy address belongs to the object at ffff88800f015d98 [ 33.157633] which belongs to the cache vm_area_struct of size 168 [ 33.159159] The buggy address is located 88 bytes inside of [ 33.159159] freed 168-byte region [ffff88800f015d98, ffff88800f015e40) [ 33.160602] [ 33.160824] The buggy address belongs to the physical page: [ 33.161523] page:000000008fc5d71d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf015 [ 33.162639] memcg:ffff88800d666d01 [ 33.163071] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.163723] page_type: 0xffffffff() [ 33.164186] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.165139] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d666d01 [ 33.166068] page dumped because: kasan: bad access detected [ 33.166753] [ 33.166968] Memory state around the buggy address: [ 33.167563] ffff88800f015c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.168427] ffff88800f015d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.169317] >ffff88800f015d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.170183] ^ [ 33.171024] ffff88800f015e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.171897] ffff88800f015e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.172773] ================================================================== [ 33.173789] Disabling lock debugging due to kernel taint [ 35.406116] BUG: Bad rss-counter state mm:000000004a70711b type:MM_FILEPAGES val:33 [ 35.407287] BUG: Bad rss-counter state mm:000000004a70711b type:MM_ANONPAGES val:22 [ 35.784350] BUG: Bad rss-counter state mm:000000006f1a1946 type:MM_FILEPAGES val:33 [ 35.784912] BUG: Bad rss-counter state mm:000000006f1a1946 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63036' (ECDSA) to the list of known hosts. 2023/06/20 04:14:14 fuzzer started 2023/06/20 04:14:14 dialing manager at localhost:44161 2023/06/20 04:14:14 checking machine... 2023/06/20 04:14:14 checking revisions... [ 36.258625] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:14:14 testing simple program... [ 36.300388] cgroup: Unknown subsys name 'net' [ 36.346501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:14:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff8880158ad1c0 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801917001c RSP=ffff88800f1df0f0 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000003 R11=ffff88801845641c R12=ffff88800f1df968 R13=ffff88800f1df510 R14=ffff88801917001c R15=ffff88800f1df4b0 RIP=ffffffff814c0380 RFL=00000202 [-------] 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 00007f159cdae900 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=00007f159cd78008 CR3=000000000db4c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f32369236c8 CR3=000000000c68c000 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=581529ed911e709e644240492b594721 XMM02=2c67c8bc2e329bc3000000000011d728 XMM03=fb795ef6d65770560000000000124ca0 XMM04=a57525c4d9769c4f00000000000ae988 XMM05=0f46ee9febc24c4600000000001355f8 XMM06=c291bd5c70af25b90000000000134698 XMM07=e042d86d42eb936e0000000000124f20 XMM08=1cc43fb7699135e3000000000011d788 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000