syzkaller login: [ 44.973978] BUG: Bad rss-counter state mm:00000000d08aee2c type:MM_FILEPAGES val:33 [ 44.975207] BUG: Bad rss-counter state mm:00000000d08aee2c type:MM_ANONPAGES val:22 [ 45.107178] ================================================================== [ 45.108161] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.109151] Read of size 8 at addr ffff88800fe00a50 by task sshd/220 [ 45.109934] [ 45.110159] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.111196] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.112237] Call Trace: [ 45.112579] [ 45.112886] dump_stack_lvl+0x91/0xf0 [ 45.113382] print_report+0xcc/0x620 [ 45.113883] ? __virt_addr_valid+0x102/0x340 [ 45.114445] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.115092] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.115764] kasan_report+0xbe/0xf0 [ 45.116276] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.116922] vma_interval_tree_remove+0xc75/0xec0 [ 45.117537] vma_prepare+0xc54/0x11a0 [ 45.118018] __split_vma+0x5af/0x950 [ 45.118514] ? __pfx___split_vma+0x10/0x10 [ 45.119065] ? find_held_lock+0x2c/0x110 [ 45.119615] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.120252] ? lock_is_held_type+0x9f/0x120 [ 45.120810] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.121423] ? mtree_range_walk+0x632/0x900 [ 45.121986] ? mas_walk+0x5c7/0x7c0 [ 45.122464] do_vmi_munmap+0x1f1/0x2b0 [ 45.122987] mmap_region+0x1f9/0x2660 [ 45.123476] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.123999] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.124718] ? __pfx_lock_acquire+0x10/0x10 [ 45.125249] ? __pfx_mmap_region+0x10/0x10 [ 45.125803] ? security_mmap_addr+0x7d/0xa0 [ 45.126349] ? get_unmapped_area+0x1f5/0x3f0 [ 45.126925] do_mmap+0x854/0xf00 [ 45.127378] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.127877] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.128458] ksys_mmap_pgoff+0x3af/0x500 [ 45.128978] do_syscall_64+0x3f/0x90 [ 45.129457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.130106] RIP: 0033:0x7f75082d1d82 [ 45.130585] 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 [ 45.132738] RSP: 002b:00007ffc7520fe18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.133652] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75082d1d82 [ 45.134526] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f750770b000 [ 45.135381] RBP: 00007f750770b000 R08: 0000000000000009 R09: 0000000000001000 [ 45.136244] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae7116fd90 [ 45.137095] R13: 00007ffc7520fe30 R14: 00007ffc7520fe60 R15: 00007ffc752101c0 [ 45.137966] [ 45.138258] [ 45.138498] Allocated by task 213: [ 45.138929] kasan_save_stack+0x22/0x50 [ 45.139451] kasan_set_track+0x25/0x30 [ 45.139943] __kasan_slab_alloc+0x59/0x70 [ 45.140466] kmem_cache_alloc+0x16b/0x370 [ 45.140983] vm_area_dup+0x20/0x160 [ 45.141458] __split_vma+0x170/0x950 [ 45.141939] split_vma+0xc6/0x110 [ 45.142384] mprotect_fixup+0x8d2/0xb30 [ 45.142925] do_mprotect_pkey+0x87e/0xd40 [ 45.143458] __x64_sys_mprotect+0x78/0xc0 [ 45.143988] do_syscall_64+0x3f/0x90 [ 45.144477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.145135] [ 45.145349] Freed by task 213: [ 45.145744] kasan_save_stack+0x22/0x50 [ 45.146266] kasan_set_track+0x25/0x30 [ 45.146803] kasan_save_free_info+0x2b/0x50 [ 45.147348] __kasan_slab_free+0x10a/0x190 [ 45.147908] kmem_cache_free+0x10d/0x4d0 [ 45.148430] rcu_core+0x8c8/0x2860 [ 45.148881] __do_softirq+0x1b7/0x7d4 [ 45.149379] [ 45.149603] Last potentially related work creation: [ 45.150196] kasan_save_stack+0x22/0x50 [ 45.150726] __kasan_record_aux_stack+0x8e/0xa0 [ 45.151323] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.152039] remove_vma+0x139/0x170 [ 45.152507] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.153069] do_vmi_munmap+0x1f1/0x2b0 [ 45.153569] __vm_munmap+0x138/0x3a0 [ 45.154047] __x64_sys_munmap+0x59/0x80 [ 45.154568] do_syscall_64+0x3f/0x90 [ 45.155062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.155703] [ 45.155932] The buggy address belongs to the object at ffff88800fe009f8 [ 45.155932] which belongs to the cache vm_area_struct of size 168 [ 45.157424] The buggy address is located 88 bytes inside of [ 45.157424] freed 168-byte region [ffff88800fe009f8, ffff88800fe00aa0) [ 45.158879] [ 45.159098] The buggy address belongs to the physical page: [ 45.159776] page:00000000c6f2783a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe00 [ 45.160885] memcg:ffff888019566a01 [ 45.161322] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.161986] page_type: 0xffffffff() [ 45.162438] raw: 0100000000000200 ffff88800879fc80 ffffea000031f980 dead000000000002 [ 45.163381] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019566a01 [ 45.164304] page dumped because: kasan: bad access detected [ 45.164982] [ 45.165196] Memory state around the buggy address: [ 45.165792] ffff88800fe00900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.166715] ffff88800fe00980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 45.167585] >ffff88800fe00a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.168451] ^ [ 45.169163] ffff88800fe00a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 45.170028] ffff88800fe00b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.170904] ================================================================== [ 45.171825] Disabling lock debugging due to kernel taint [ 47.372355] BUG: Bad rss-counter state mm:0000000018284a59 type:MM_FILEPAGES val:33 [ 47.373839] BUG: Bad rss-counter state mm:0000000018284a59 type:MM_ANONPAGES val:22 [ 47.872815] BUG: Bad rss-counter state mm:00000000d44feaef type:MM_FILEPAGES val:33 [ 47.873844] BUG: Bad rss-counter state mm:00000000d44feaef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31339' (ECDSA) to the list of known hosts. 2023/06/19 12:48:08 fuzzer started 2023/06/19 12:48:08 dialing manager at localhost:44161 2023/06/19 12:48:08 checking machine... 2023/06/19 12:48:08 checking revisions... [ 48.603337] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:48:08 testing simple program... [ 48.647781] cgroup: Unknown subsys name 'net' [ 48.689747] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:48:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88807ffd7030 RCX=0000000000000100 RDX=ffff888008d70000 RSI=ffffffff811431c2 RDI=0000000000000007 RBP=000000001c9c1410 RSP=ffff888008d7fc58 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000128 R12=0000000000000001 R13=0000000000000008 R14=0000000000000002 R15=ffff88800dbbf200 RIP=ffffffff814c0811 RFL=00000206 [-----P-] 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 0000000000000000 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=00007fb1323480b0 CR3=000000000f2d4000 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=2037303a38343a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a38343a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800f2f9a20 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8452fd53 RBP=ffffffff856d8220 RSP=ffff88800fc777f8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000800f0008 R12=0000000000000283 R13=ffffea00003cbe40 R14=ffffffff817693c7 R15=ffff888009ae1f00 RIP=ffffffff8153432b RFL=00000006 [-----P-] 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 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=00007f926fc03320 CR3=000000000988e000 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=ed11c12dbba413a924429b45ecd0cb36 XMM02=ec2efd57dc4c00df0000000000120228 XMM03=b612fff2172ce94700000000001202f8 XMM04=bdd0ce5697b22a2300000000000ae988 XMM05=19e9129bd510f2350000000000133ae8 XMM06=a2eb3126228a5cd50000000000132cc0 XMM07=e042d86d42eb936e00000000001244e8 XMM08=b612fff2172ce94700000000001202f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000