syzkaller login: [ 30.821457] BUG: Bad rss-counter state mm:00000000994092d8 type:MM_FILEPAGES val:33 [ 30.822700] BUG: Bad rss-counter state mm:00000000994092d8 type:MM_ANONPAGES val:22 [ 30.853530] ================================================================== [ 30.854335] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.855155] Read of size 8 at addr ffff88800ded9228 by task sshd/220 [ 30.855834] [ 30.856045] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.856789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.857713] Call Trace: [ 30.858063] [ 30.858286] dump_stack_lvl+0x91/0xf0 [ 30.858658] print_report+0xcc/0x620 [ 30.859027] ? __virt_addr_valid+0x102/0x340 [ 30.859510] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.860007] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.860473] kasan_report+0xbe/0xf0 [ 30.860831] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.861314] vma_interval_tree_remove+0xc75/0xec0 [ 30.861771] vma_prepare+0xc54/0x11a0 [ 30.862138] __split_vma+0x5af/0x950 [ 30.862496] ? __pfx___split_vma+0x10/0x10 [ 30.862906] ? find_held_lock+0x2c/0x110 [ 30.863310] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.863747] ? lock_is_held_type+0x9f/0x120 [ 30.864167] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.864634] ? mtree_range_walk+0x632/0x900 [ 30.865062] ? mas_walk+0x5c7/0x7c0 [ 30.865456] do_vmi_munmap+0x1f1/0x2b0 [ 30.865839] mmap_region+0x1f9/0x2660 [ 30.866128] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.866421] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.866830] ? __pfx_lock_acquire+0x10/0x10 [ 30.867134] ? __pfx_mmap_region+0x10/0x10 [ 30.867437] ? security_mmap_addr+0x7d/0xa0 [ 30.867744] ? get_unmapped_area+0x1f5/0x3f0 [ 30.868060] do_mmap+0x854/0xf00 [ 30.868311] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.868596] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.868923] ksys_mmap_pgoff+0x3af/0x500 [ 30.869218] do_syscall_64+0x3f/0x90 [ 30.869496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.869872] RIP: 0033:0x7f0fbc142d82 [ 30.870136] 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 [ 30.871368] RSP: 002b:00007ffcbaf6c568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.871882] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0fbc142d82 [ 30.872376] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0fbb57c000 [ 30.872862] RBP: 00007f0fbb57c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.873361] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d976f4d90 [ 30.873840] R13: 00007ffcbaf6c580 R14: 00007ffcbaf6c5b0 R15: 00007ffcbaf6c910 [ 30.874332] [ 30.874496] [ 30.874617] Allocated by task 213: [ 30.874866] kasan_save_stack+0x22/0x50 [ 30.875153] kasan_set_track+0x25/0x30 [ 30.875437] __kasan_slab_alloc+0x59/0x70 [ 30.875739] kmem_cache_alloc+0x16b/0x370 [ 30.876034] vm_area_dup+0x20/0x160 [ 30.876293] __split_vma+0x170/0x950 [ 30.876560] split_vma+0xc6/0x110 [ 30.876810] mprotect_fixup+0x8d2/0xb30 [ 30.877095] do_mprotect_pkey+0x87e/0xd40 [ 30.877405] __x64_sys_mprotect+0x78/0xc0 [ 30.877700] do_syscall_64+0x3f/0x90 [ 30.877972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.878342] [ 30.878465] Freed by task 203: [ 30.878688] kasan_save_stack+0x22/0x50 [ 30.878975] kasan_set_track+0x25/0x30 [ 30.879258] kasan_save_free_info+0x2b/0x50 [ 30.879564] __kasan_slab_free+0x10a/0x190 [ 30.879864] kmem_cache_free+0x10d/0x4d0 [ 30.880154] rcu_core+0x8c8/0x2860 [ 30.880415] __do_softirq+0x1b7/0x7d4 [ 30.880686] [ 30.880811] Last potentially related work creation: [ 30.881159] kasan_save_stack+0x22/0x50 [ 30.881451] __kasan_record_aux_stack+0x8e/0xa0 [ 30.881775] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.882147] remove_vma+0x139/0x170 [ 30.882407] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.882723] do_vmi_munmap+0x1f1/0x2b0 [ 30.882999] __vm_munmap+0x138/0x3a0 [ 30.883263] __x64_sys_munmap+0x59/0x80 [ 30.883547] do_syscall_64+0x3f/0x90 [ 30.883819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.884190] [ 30.884312] The buggy address belongs to the object at ffff88800ded91d0 [ 30.884312] which belongs to the cache vm_area_struct of size 168 [ 30.885172] The buggy address is located 88 bytes inside of [ 30.885172] freed 168-byte region [ffff88800ded91d0, ffff88800ded9278) [ 30.885990] [ 30.886113] The buggy address belongs to the physical page: [ 30.886492] page:00000000ad5fde44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xded9 [ 30.887116] memcg:ffff88800d781001 [ 30.887357] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.887724] page_type: 0xffffffff() [ 30.887983] raw: 0100000000000200 ffff8880087a0c80 ffffea000037bf80 dead000000000006 [ 30.888507] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d781001 [ 30.889023] page dumped because: kasan: bad access detected [ 30.889413] [ 30.889534] Memory state around the buggy address: [ 30.889866] ffff88800ded9100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.890355] ffff88800ded9180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.890838] >ffff88800ded9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.891324] ^ [ 30.891641] ffff88800ded9280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.892134] ffff88800ded9300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.892621] ================================================================== [ 30.893178] Disabling lock debugging due to kernel taint [ 32.271823] BUG: Bad rss-counter state mm:000000009841650e type:MM_FILEPAGES val:33 [ 32.272592] BUG: Bad rss-counter state mm:000000009841650e type:MM_ANONPAGES val:22 [ 32.682043] BUG: Bad rss-counter state mm:000000000c9844d2 type:MM_FILEPAGES val:33 [ 32.682816] BUG: Bad rss-counter state mm:000000000c9844d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57426' (ECDSA) to the list of known hosts. 2023/06/20 20:16:25 fuzzer started 2023/06/20 20:16:25 dialing manager at localhost:36067 2023/06/20 20:16:25 checking machine... 2023/06/20 20:16:25 checking revisions... [ 33.359558] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:16:26 testing simple program... [ 33.401813] cgroup: Unknown subsys name 'net' [ 33.440434] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:16:25 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800f0051c0 RSP=ffff88801681ff10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88801681ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81390a2f RFL=00000046 [---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 00007f5e33774900 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=00007ffe8d327000 CR3=0000000014762000 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=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 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=ffff88806cf09df0 RSI=0000000000000000 RDI=ffff88806cf09aa8 RBP=ffff88806cf02000 RSP=ffff88806cf09a68 R8 =ffffffff86138e90 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09de8 R15=ffff88806cf09a98 RIP=ffffffff81130930 RFL=00000296 [--S-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 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=00007f54d3915450 CR3=000000000c610000 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=2035323a36313a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a36313a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000