syzkaller login: [ 31.001425] BUG: Bad rss-counter state mm:000000006db538c9 type:MM_FILEPAGES val:33 [ 31.002640] BUG: Bad rss-counter state mm:000000006db538c9 type:MM_ANONPAGES val:22 [ 31.074483] ================================================================== [ 31.075438] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.076418] Read of size 8 at addr ffff88800d8f7a50 by task sshd/219 [ 31.077184] [ 31.077444] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.078488] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.079502] Call Trace: [ 31.079833] [ 31.080128] dump_stack_lvl+0x91/0xf0 [ 31.080649] print_report+0xcc/0x620 [ 31.081131] ? __virt_addr_valid+0x102/0x340 [ 31.081746] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.082369] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.083017] kasan_report+0xbe/0xf0 [ 31.083547] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.084169] vma_interval_tree_remove+0xc75/0xec0 [ 31.084821] vma_prepare+0xc54/0x11a0 [ 31.085306] __split_vma+0x5af/0x950 [ 31.085826] ? __pfx___split_vma+0x10/0x10 [ 31.086395] ? find_held_lock+0x2c/0x110 [ 31.086970] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.087555] ? lock_is_held_type+0x9f/0x120 [ 31.088087] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.088744] ? mtree_range_walk+0x632/0x900 [ 31.089299] ? mas_walk+0x5c7/0x7c0 [ 31.089841] do_vmi_munmap+0x1f1/0x2b0 [ 31.090333] mmap_region+0x1f9/0x2660 [ 31.090858] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.091384] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.092091] ? __pfx_lock_acquire+0x10/0x10 [ 31.092631] ? __pfx_mmap_region+0x10/0x10 [ 31.093165] ? security_mmap_addr+0x7d/0xa0 [ 31.093713] ? get_unmapped_area+0x1f5/0x3f0 [ 31.094267] do_mmap+0x854/0xf00 [ 31.094703] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.095194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.095754] ksys_mmap_pgoff+0x3af/0x500 [ 31.096264] do_syscall_64+0x3f/0x90 [ 31.096759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.097409] RIP: 0033:0x7fb8a3412d82 [ 31.097880] 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 [ 31.100313] RSP: 002b:00007ffd24b1c638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.101323] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb8a3412d82 [ 31.102227] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb8a284c000 [ 31.103121] RBP: 00007fb8a284c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.104170] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619f42b9b20 [ 31.105087] R13: 00007ffd24b1c650 R14: 00007ffd24b1c680 R15: 00007ffd24b1c9e0 [ 31.106004] [ 31.106314] [ 31.106541] Allocated by task 212: [ 31.106988] kasan_save_stack+0x22/0x50 [ 31.107513] kasan_set_track+0x25/0x30 [ 31.108031] __kasan_slab_alloc+0x59/0x70 [ 31.108588] kmem_cache_alloc+0x16b/0x370 [ 31.109139] vm_area_dup+0x20/0x160 [ 31.109687] __split_vma+0x170/0x950 [ 31.110175] split_vma+0xc6/0x110 [ 31.110631] mprotect_fixup+0x8d2/0xb30 [ 31.111157] do_mprotect_pkey+0x87e/0xd40 [ 31.111695] __x64_sys_mprotect+0x78/0xc0 [ 31.112288] do_syscall_64+0x3f/0x90 [ 31.112782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.113518] [ 31.113741] Freed by task 212: [ 31.114141] kasan_save_stack+0x22/0x50 [ 31.114707] kasan_set_track+0x25/0x30 [ 31.115227] kasan_save_free_info+0x2b/0x50 [ 31.115819] __kasan_slab_free+0x10a/0x190 [ 31.116374] kmem_cache_free+0x10d/0x4d0 [ 31.116923] rcu_core+0x8c8/0x2860 [ 31.117402] __do_softirq+0x1b7/0x7d4 [ 31.117959] [ 31.118179] Last potentially related work creation: [ 31.118784] kasan_save_stack+0x22/0x50 [ 31.119348] __kasan_record_aux_stack+0x8e/0xa0 [ 31.119940] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.120646] remove_vma+0x139/0x170 [ 31.121135] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.121754] do_vmi_munmap+0x1f1/0x2b0 [ 31.122267] __vm_munmap+0x138/0x3a0 [ 31.122769] __x64_sys_munmap+0x59/0x80 [ 31.123343] do_syscall_64+0x3f/0x90 [ 31.123846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.124564] [ 31.124801] Second to last potentially related work creation: [ 31.125558] kasan_save_stack+0x22/0x50 [ 31.126126] __kasan_record_aux_stack+0x8e/0xa0 [ 31.126773] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.127494] remove_vma+0x139/0x170 [ 31.127976] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.128557] do_vmi_munmap+0x1f1/0x2b0 [ 31.129100] mmap_region+0x1f9/0x2660 [ 31.129612] do_mmap+0x854/0xf00 [ 31.130060] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.130559] ksys_mmap_pgoff+0x3af/0x500 [ 31.131055] do_syscall_64+0x3f/0x90 [ 31.131535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.132178] [ 31.132392] The buggy address belongs to the object at ffff88800d8f79f8 [ 31.132392] which belongs to the cache vm_area_struct of size 168 [ 31.133884] The buggy address is located 88 bytes inside of [ 31.133884] freed 168-byte region [ffff88800d8f79f8, ffff88800d8f7aa0) [ 31.135466] [ 31.135683] The buggy address belongs to the physical page: [ 31.136346] page:00000000475f79c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8f7 [ 31.137423] memcg:ffff88800efadd01 [ 31.137891] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.138568] page_type: 0xffffffff() [ 31.139051] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.140183] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efadd01 [ 31.141104] page dumped because: kasan: bad access detected [ 31.141793] [ 31.142012] Memory state around the buggy address: [ 31.142603] ffff88800d8f7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.143580] ffff88800d8f7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.144497] >ffff88800d8f7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.145362] ^ [ 31.146083] ffff88800d8f7a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.146940] ffff88800d8f7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.147834] ================================================================== [ 31.149057] Disabling lock debugging due to kernel taint [ 32.964771] BUG: Bad rss-counter state mm:00000000cc877fc2 type:MM_FILEPAGES val:33 [ 32.965500] BUG: Bad rss-counter state mm:00000000cc877fc2 type:MM_ANONPAGES val:22 [ 33.371543] BUG: Bad rss-counter state mm:000000004b4a9e94 type:MM_FILEPAGES val:33 [ 33.372127] BUG: Bad rss-counter state mm:000000004b4a9e94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40489' (ECDSA) to the list of known hosts. 2023/06/20 07:10:10 fuzzer started 2023/06/20 07:10:10 dialing manager at localhost:44161 2023/06/20 07:10:10 checking machine... 2023/06/20 07:10:10 checking revisions... [ 34.013220] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:10:10 testing simple program... [ 34.057978] cgroup: Unknown subsys name 'net' [ 34.094886] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:10:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008c78000 RCX=ffffffff87f94640 RDX=0000000000000000 RSI=0000000000000001 RDI=ffff88801960d1c0 RBP=0000000000000000 RSP=ffff888018fbfc50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000fffff000 R13=0000000000000000 R14=ffff88800c9f8000 R15=ffff88801926f8c0 RIP=ffffffff811f8ad4 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 00007f23b18da900 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=00007f23b1e91618 CR3=000000001a83a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbf943 RBX=ffffffff85dfca1c RCX=ffffffff8180c521 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfc9fc RSP=ffff88806cf09998 R8 =ffffffff86137508 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca3c R13=ffffffff85dfc9fc R14=ffffffff85dfc9fc R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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=00007f6f9f7d7030 CR3=000000000e266000 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=2030313a30313a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a30313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000