syzkaller login: [ 40.098444] BUG: Bad rss-counter state mm:0000000036e49957 type:MM_FILEPAGES val:33 [ 40.099896] BUG: Bad rss-counter state mm:0000000036e49957 type:MM_ANONPAGES val:22 [ 40.140610] ================================================================== [ 40.141708] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.142652] Read of size 8 at addr ffff88800fb74880 by task sshd/220 [ 40.143426] [ 40.143647] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.144522] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.145485] Call Trace: [ 40.145806] [ 40.146091] dump_stack_lvl+0x91/0xf0 [ 40.146581] print_report+0xcc/0x620 [ 40.147067] ? __virt_addr_valid+0x102/0x340 [ 40.147618] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.148250] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.148867] kasan_report+0xbe/0xf0 [ 40.149364] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.150038] vma_interval_tree_remove+0xc75/0xec0 [ 40.150665] vma_prepare+0xc54/0x11a0 [ 40.151177] __split_vma+0x5af/0x950 [ 40.151659] ? __pfx___split_vma+0x10/0x10 [ 40.152203] ? find_held_lock+0x2c/0x110 [ 40.152773] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.153364] ? lock_is_held_type+0x9f/0x120 [ 40.153936] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.154594] ? mtree_range_walk+0x632/0x900 [ 40.155174] ? mas_walk+0x5c7/0x7c0 [ 40.155659] do_vmi_munmap+0x1f1/0x2b0 [ 40.156178] mmap_region+0x1f9/0x2660 [ 40.156727] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.157260] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.158020] ? __pfx_lock_acquire+0x10/0x10 [ 40.158599] ? __pfx_mmap_region+0x10/0x10 [ 40.159173] ? security_mmap_addr+0x7d/0xa0 [ 40.159722] ? get_unmapped_area+0x1f5/0x3f0 [ 40.160321] do_mmap+0x854/0xf00 [ 40.160793] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.161329] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.161923] ksys_mmap_pgoff+0x3af/0x500 [ 40.162464] do_syscall_64+0x3f/0x90 [ 40.162978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.163652] RIP: 0033:0x7f5e17b49d82 [ 40.164144] 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 [ 40.166452] RSP: 002b:00007ffc710c8708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.167423] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e17b49d82 [ 40.168457] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e16f83000 [ 40.169379] RBP: 00007f5e16f83000 R08: 0000000000000009 R09: 0000000000001000 [ 40.170289] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c0593cec0 [ 40.171195] R13: 00007ffc710c8720 R14: 00007ffc710c8750 R15: 00007ffc710c8ab0 [ 40.172095] [ 40.172422] [ 40.172652] Allocated by task 213: [ 40.173114] kasan_save_stack+0x22/0x50 [ 40.173662] kasan_set_track+0x25/0x30 [ 40.174193] __kasan_slab_alloc+0x59/0x70 [ 40.174758] kmem_cache_alloc+0x16b/0x370 [ 40.175314] vm_area_dup+0x20/0x160 [ 40.175781] __split_vma+0x170/0x950 [ 40.176306] split_vma+0xc6/0x110 [ 40.176791] mprotect_fixup+0x8d2/0xb30 [ 40.177352] do_mprotect_pkey+0x87e/0xd40 [ 40.177994] __x64_sys_mprotect+0x78/0xc0 [ 40.178582] do_syscall_64+0x3f/0x90 [ 40.179111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.179859] [ 40.180113] Freed by task 213: [ 40.180600] kasan_save_stack+0x22/0x50 [ 40.181202] kasan_set_track+0x25/0x30 [ 40.181788] kasan_save_free_info+0x2b/0x50 [ 40.182419] __kasan_slab_free+0x10a/0x190 [ 40.183058] kmem_cache_free+0x10d/0x4d0 [ 40.183665] rcu_core+0x8c8/0x2860 [ 40.184196] __do_softirq+0x1b7/0x7d4 [ 40.184795] [ 40.185053] Last potentially related work creation: [ 40.185750] kasan_save_stack+0x22/0x50 [ 40.186352] __kasan_record_aux_stack+0x8e/0xa0 [ 40.187033] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.187802] remove_vma+0x139/0x170 [ 40.188354] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.189016] do_vmi_munmap+0x1f1/0x2b0 [ 40.189593] __vm_munmap+0x138/0x3a0 [ 40.190151] __x64_sys_munmap+0x59/0x80 [ 40.190745] do_syscall_64+0x3f/0x90 [ 40.191307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.192071] [ 40.192338] The buggy address belongs to the object at ffff88800fb74828 [ 40.192338] which belongs to the cache vm_area_struct of size 168 [ 40.194096] The buggy address is located 88 bytes inside of [ 40.194096] freed 168-byte region [ffff88800fb74828, ffff88800fb748d0) [ 40.195772] [ 40.196028] The buggy address belongs to the physical page: [ 40.196841] page:000000000e906e4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb74 [ 40.198128] memcg:ffff88801a356b01 [ 40.198637] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.199405] page_type: 0xffffffff() [ 40.199937] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.201052] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a356b01 [ 40.202134] page dumped because: kasan: bad access detected [ 40.202924] [ 40.203178] Memory state around the buggy address: [ 40.203876] ffff88800fb74780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 40.204921] ffff88800fb74800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.205941] >ffff88800fb74880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.206956] ^ [ 40.207443] ffff88800fb74900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.208471] ffff88800fb74980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 40.209481] ================================================================== [ 40.210806] Disabling lock debugging due to kernel taint [ 42.144512] BUG: Bad rss-counter state mm:00000000f93fa860 type:MM_FILEPAGES val:33 [ 42.145590] BUG: Bad rss-counter state mm:00000000f93fa860 type:MM_ANONPAGES val:22 [ 42.632348] BUG: Bad rss-counter state mm:0000000086350595 type:MM_FILEPAGES val:33 [ 42.633422] BUG: Bad rss-counter state mm:0000000086350595 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58042' (ECDSA) to the list of known hosts. 2023/06/20 03:20:51 fuzzer started 2023/06/20 03:20:51 dialing manager at localhost:44161 2023/06/20 03:20:51 checking machine... 2023/06/20 03:20:51 checking revisions... [ 43.402958] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:20:51 testing simple program... [ 43.458019] cgroup: Unknown subsys name 'net' [ 43.508788] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:20:50 Registers: info registers vcpu 0 RAX=00000000000000ca RBX=00000000000000c8 RCX=00007f0f16ed97b2 RDX=0000000000000000 RSI=0000000000000080 RDI=000055eb533d1e90 RBP=000055eb533d1e68 RSP=00007f0f16098ac0 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000282 R12=0000000000000000 R13=000055eb533d1c50 R14=000055eb533d1e90 R15=00007f0f16098af0 RIP=ffffffff84600007 RFL=00000002 [-------] 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 00007f0f16099700 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=00007ff9a4a31000 CR3=000000000de22000 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=2030353a30323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a30323a3330203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007fc016f9b618 CR3=000000000de22000 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=30323a3330203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363835 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000