syzkaller login: [ 46.242459] BUG: Bad rss-counter state mm:0000000030dfc26d type:MM_FILEPAGES val:33 [ 46.243461] BUG: Bad rss-counter state mm:0000000030dfc26d type:MM_ANONPAGES val:22 [ 46.361187] ================================================================== [ 46.361855] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.362453] Read of size 8 at addr ffff88800f1d2058 by task sshd/221 [ 46.362947] [ 46.363089] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.363675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.364332] Call Trace: [ 46.364537] [ 46.364719] dump_stack_lvl+0x91/0xf0 [ 46.365038] print_report+0xcc/0x620 [ 46.365388] ? __virt_addr_valid+0x102/0x340 [ 46.365957] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.366363] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.366758] kasan_report+0xbe/0xf0 [ 46.367060] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.367473] vma_interval_tree_remove+0xc75/0xec0 [ 46.367863] vma_prepare+0xc54/0x11a0 [ 46.368191] __split_vma+0x5af/0x950 [ 46.368493] ? __pfx___split_vma+0x10/0x10 [ 46.368842] ? find_held_lock+0x2c/0x110 [ 46.369180] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.369578] ? lock_is_held_type+0x9f/0x120 [ 46.369923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.370305] ? mtree_range_walk+0x632/0x900 [ 46.370667] ? mas_walk+0x5c7/0x7c0 [ 46.370996] do_vmi_munmap+0x1f1/0x2b0 [ 46.371338] mmap_region+0x1f9/0x2660 [ 46.371648] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.371976] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.372466] ? __pfx_lock_acquire+0x10/0x10 [ 46.372819] ? __pfx_mmap_region+0x10/0x10 [ 46.373165] ? security_mmap_addr+0x7d/0xa0 [ 46.373530] ? get_unmapped_area+0x1f5/0x3f0 [ 46.373885] do_mmap+0x854/0xf00 [ 46.374195] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.374512] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.374873] ksys_mmap_pgoff+0x3af/0x500 [ 46.375205] do_syscall_64+0x3f/0x90 [ 46.375510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.375931] RIP: 0033:0x7f3a9e507d82 [ 46.376291] 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 [ 46.377954] RSP: 002b:00007ffefab88a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.378635] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a9e507d82 [ 46.379233] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a9d941000 [ 46.379834] RBP: 00007f3a9d941000 R08: 0000000000000009 R09: 0000000000001000 [ 46.380419] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6cef5fec0 [ 46.381002] R13: 00007ffefab88a70 R14: 00007ffefab88aa0 R15: 00007ffefab88e00 [ 46.381663] [ 46.381871] [ 46.382026] Allocated by task 214: [ 46.382323] kasan_save_stack+0x22/0x50 [ 46.382681] kasan_set_track+0x25/0x30 [ 46.383027] __kasan_slab_alloc+0x59/0x70 [ 46.383393] kmem_cache_alloc+0x16b/0x370 [ 46.383732] vm_area_dup+0x20/0x160 [ 46.384044] __split_vma+0x170/0x950 [ 46.384357] split_vma+0xc6/0x110 [ 46.384635] mprotect_fixup+0x8d2/0xb30 [ 46.384958] do_mprotect_pkey+0x87e/0xd40 [ 46.385331] __x64_sys_mprotect+0x78/0xc0 [ 46.385678] do_syscall_64+0x3f/0x90 [ 46.386007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.386458] [ 46.386609] Freed by task 19: [ 46.386893] kasan_save_stack+0x22/0x50 [ 46.387289] kasan_set_track+0x25/0x30 [ 46.387637] kasan_save_free_info+0x2b/0x50 [ 46.388023] __kasan_slab_free+0x10a/0x190 [ 46.388401] kmem_cache_free+0x10d/0x4d0 [ 46.388740] rcu_core+0x8c8/0x2860 [ 46.389023] __do_softirq+0x1b7/0x7d4 [ 46.389396] [ 46.389550] Last potentially related work creation: [ 46.389962] kasan_save_stack+0x22/0x50 [ 46.390307] __kasan_record_aux_stack+0x8e/0xa0 [ 46.390680] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.391135] remove_vma+0x139/0x170 [ 46.391441] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.391834] do_vmi_munmap+0x1f1/0x2b0 [ 46.392172] __vm_munmap+0x138/0x3a0 [ 46.392517] __x64_sys_munmap+0x59/0x80 [ 46.392854] do_syscall_64+0x3f/0x90 [ 46.393177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.393657] [ 46.393802] The buggy address belongs to the object at ffff88800f1d2000 [ 46.393802] which belongs to the cache vm_area_struct of size 168 [ 46.394807] The buggy address is located 88 bytes inside of [ 46.394807] freed 168-byte region [ffff88800f1d2000, ffff88800f1d20a8) [ 46.395806] [ 46.395953] The buggy address belongs to the physical page: [ 46.396419] page:00000000220db376 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1d2 [ 46.397241] memcg:ffff88800d54b501 [ 46.397534] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.397973] page_type: 0xffffffff() [ 46.398269] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.398917] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d54b501 [ 46.399526] page dumped because: kasan: bad access detected [ 46.399990] [ 46.400156] Memory state around the buggy address: [ 46.400564] ffff88800f1d1f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 46.401163] ffff88800f1d1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 46.401807] >ffff88800f1d2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.402414] ^ [ 46.402923] ffff88800f1d2080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 46.403566] ffff88800f1d2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.404154] ================================================================== [ 46.404868] Disabling lock debugging due to kernel taint [ 47.857803] BUG: Bad rss-counter state mm:0000000080f80f3d type:MM_FILEPAGES val:33 [ 47.858975] BUG: Bad rss-counter state mm:0000000080f80f3d type:MM_ANONPAGES val:22 [ 48.200571] BUG: Bad rss-counter state mm:000000002115d11b type:MM_FILEPAGES val:32 [ 48.201407] BUG: Bad rss-counter state mm:000000002115d11b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8976' (ECDSA) to the list of known hosts. 2023/06/20 09:50:56 fuzzer started 2023/06/20 09:50:56 dialing manager at localhost:44161 2023/06/20 09:50:56 checking machine... 2023/06/20 09:50:56 checking revisions... [ 48.780389] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:50:56 testing simple program... [ 48.817707] cgroup: Unknown subsys name 'net' [ 48.867228] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:50:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800e9ad1c0 RSI=ffffffff83c632c0 RDI=ffffffff87f94830 RBP=0000000000000000 RSP=ffff888018f5f6a0 R8 =0000000000000005 R9 =00000000000000ff R10=000000000000008d R11=00000ef500000ef5 R12=0000000000000000 R13=000000000000008d R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c081b 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 00007eff6b823900 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=000055d2cb494954 CR3=000000000fe7c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110011ae390 RSI=00000000000000eb RDI=ffff888008d71bc0 RBP=0000000000000009 RSP=ffff88806cf09b50 R8 =0000000000000000 R9 =ffff88806cf3965c R10=0000000000000000 R11=00000000efe4b99a R12=ffff88806cf395c0 R13=dffffc0000000000 R14=ffff888008d71c40 R15=ffff888008d71bc0 RIP=ffffffff81252efa 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 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=00007f5e87928ea0 CR3=00000000159b4000 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=2035353a30353a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a30353a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000