syzkaller login: [ 31.015288] BUG: Bad rss-counter state mm:00000000ffa3c499 type:MM_FILEPAGES val:33 [ 31.016069] BUG: Bad rss-counter state mm:00000000ffa3c499 type:MM_ANONPAGES val:22 [ 31.046276] ================================================================== [ 31.046911] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.047556] Read of size 8 at addr ffff8880165c1c20 by task sshd/220 [ 31.048102] [ 31.048254] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.048853] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.049518] Call Trace: [ 31.049746] [ 31.050079] dump_stack_lvl+0x91/0xf0 [ 31.050447] print_report+0xcc/0x620 [ 31.050782] ? __virt_addr_valid+0x102/0x340 [ 31.051158] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.051577] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.051999] kasan_report+0xbe/0xf0 [ 31.052377] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.052811] vma_interval_tree_remove+0xc75/0xec0 [ 31.053237] vma_prepare+0xc54/0x11a0 [ 31.053583] __split_vma+0x5af/0x950 [ 31.053925] ? __pfx___split_vma+0x10/0x10 [ 31.054294] ? find_held_lock+0x2c/0x110 [ 31.054640] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.055029] ? lock_is_held_type+0x9f/0x120 [ 31.055400] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.055817] ? mtree_range_walk+0x632/0x900 [ 31.056254] ? mas_walk+0x5c7/0x7c0 [ 31.056584] do_vmi_munmap+0x1f1/0x2b0 [ 31.056921] mmap_region+0x1f9/0x2660 [ 31.057257] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.057607] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.058102] ? __pfx_lock_acquire+0x10/0x10 [ 31.058469] ? __pfx_mmap_region+0x10/0x10 [ 31.058831] ? security_mmap_addr+0x7d/0xa0 [ 31.059200] ? get_unmapped_area+0x1f5/0x3f0 [ 31.059577] do_mmap+0x854/0xf00 [ 31.059876] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.060249] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.060644] ksys_mmap_pgoff+0x3af/0x500 [ 31.060995] do_syscall_64+0x3f/0x90 [ 31.061327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.061776] RIP: 0033:0x7f4cd1e60d82 [ 31.062102] 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 [ 31.063589] RSP: 002b:00007ffe975327a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.064277] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4cd1e60d82 [ 31.064873] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4cd129a000 [ 31.065492] RBP: 00007f4cd129a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.066079] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562bb72daec0 [ 31.066718] R13: 00007ffe975327c0 R14: 00007ffe975327f0 R15: 00007ffe97532b50 [ 31.067316] [ 31.067520] [ 31.067669] Allocated by task 213: [ 31.067967] kasan_save_stack+0x22/0x50 [ 31.068352] kasan_set_track+0x25/0x30 [ 31.068691] __kasan_slab_alloc+0x59/0x70 [ 31.069047] kmem_cache_alloc+0x16b/0x370 [ 31.069407] vm_area_dup+0x20/0x160 [ 31.069713] __split_vma+0x170/0x950 [ 31.070038] split_vma+0xc6/0x110 [ 31.070338] mprotect_fixup+0x8d2/0xb30 [ 31.070678] do_mprotect_pkey+0x87e/0xd40 [ 31.071039] __x64_sys_mprotect+0x78/0xc0 [ 31.071397] do_syscall_64+0x3f/0x90 [ 31.071719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.072203] [ 31.072353] Freed by task 213: [ 31.072635] kasan_save_stack+0x22/0x50 [ 31.072984] kasan_set_track+0x25/0x30 [ 31.073320] kasan_save_free_info+0x2b/0x50 [ 31.073690] __kasan_slab_free+0x10a/0x190 [ 31.074063] kmem_cache_free+0x10d/0x4d0 [ 31.074419] rcu_core+0x8c8/0x2860 [ 31.074722] __do_softirq+0x1b7/0x7d4 [ 31.075048] [ 31.075203] Last potentially related work creation: [ 31.075613] kasan_save_stack+0x22/0x50 [ 31.075952] __kasan_record_aux_stack+0x8e/0xa0 [ 31.076357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.076797] remove_vma+0x139/0x170 [ 31.077113] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.077514] do_vmi_munmap+0x1f1/0x2b0 [ 31.077849] __vm_munmap+0x138/0x3a0 [ 31.078164] __x64_sys_munmap+0x59/0x80 [ 31.078484] do_syscall_64+0x3f/0x90 [ 31.078807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.079276] [ 31.079424] The buggy address belongs to the object at ffff8880165c1bc8 [ 31.079424] which belongs to the cache vm_area_struct of size 168 [ 31.080482] The buggy address is located 88 bytes inside of [ 31.080482] freed 168-byte region [ffff8880165c1bc8, ffff8880165c1c70) [ 31.081413] [ 31.081555] The buggy address belongs to the physical page: [ 31.081984] page:00000000d6002a11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165c1 [ 31.082696] memcg:ffff88800cb88c01 [ 31.082979] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.083420] page_type: 0xffffffff() [ 31.083712] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.084346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb88c01 [ 31.084927] page dumped because: kasan: bad access detected [ 31.085351] [ 31.085489] Memory state around the buggy address: [ 31.085871] ffff8880165c1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.086437] ffff8880165c1b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.087028] >ffff8880165c1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.087622] ^ [ 31.087984] ffff8880165c1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.088582] ffff8880165c1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.089133] ================================================================== [ 31.089919] Disabling lock debugging due to kernel taint [ 32.736889] BUG: Bad rss-counter state mm:00000000e79ed49d type:MM_FILEPAGES val:33 [ 32.737635] BUG: Bad rss-counter state mm:00000000e79ed49d type:MM_ANONPAGES val:22 [ 33.061507] BUG: Bad rss-counter state mm:0000000079a73b72 type:MM_FILEPAGES val:33 [ 33.062212] BUG: Bad rss-counter state mm:0000000079a73b72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15479' (ECDSA) to the list of known hosts. 2023/06/21 09:37:44 fuzzer started 2023/06/21 09:37:44 dialing manager at localhost:36067 2023/06/21 09:37:44 checking machine... 2023/06/21 09:37:44 checking revisions... [ 33.622026] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:37:44 testing simple program... [ 33.658911] cgroup: Unknown subsys name 'net' [ 33.699480] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:37:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000b4e96b62 RCX=0000000000000000 RDX=ffff88800daa8000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff8880178c1d80 RSP=ffff88800e7a7548 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffffff849f2fd8 R13=ffffffff849f2d80 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c0430 RFL=00000246 [---Z-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 00007f99f601c700 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=00007ffd35ff5c68 CR3=0000000018242000 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=2034343a37333a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a37333a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888018277a68 RCX=ffffffff86138eb0 RDX=1ffff1100304eee3 RSI=0000000000000000 RDI=ffff888018277718 RBP=ffff888018270000 RSP=ffff888018277698 R8 =ffffffff86138eb4 R9 =ffff888018277748 R10=0000000000038001 R11=0000000000020d9c R12=ffff888018277768 R13=ffff888018277750 R14=ffff888018277a68 R15=ffff888018277708 RIP=ffffffff81131ca6 RFL=00000246 [---Z-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 00007f539809a900 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=00007ffda361f000 CR3=000000000efec000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000