syzkaller login: [ 30.993362] BUG: Bad rss-counter state mm:0000000093b436e8 type:MM_FILEPAGES val:33 [ 30.994543] BUG: Bad rss-counter state mm:0000000093b436e8 type:MM_ANONPAGES val:22 [ 31.156202] ================================================================== [ 31.157136] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.158086] Read of size 8 at addr ffff88800cc1f228 by task sshd/220 [ 31.158947] [ 31.159166] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.160025] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.161026] Call Trace: [ 31.161354] [ 31.161638] dump_stack_lvl+0x91/0xf0 [ 31.162144] print_report+0xcc/0x620 [ 31.162625] ? __virt_addr_valid+0x102/0x340 [ 31.163180] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.163793] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.164411] kasan_report+0xbe/0xf0 [ 31.164887] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.165507] vma_interval_tree_remove+0xc75/0xec0 [ 31.166124] vma_prepare+0xc54/0x11a0 [ 31.166604] __split_vma+0x5af/0x950 [ 31.167076] ? __pfx___split_vma+0x10/0x10 [ 31.167603] ? find_held_lock+0x2c/0x110 [ 31.168131] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.168705] ? lock_is_held_type+0x9f/0x120 [ 31.169250] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.169881] ? mtree_range_walk+0x632/0x900 [ 31.170451] ? mas_walk+0x5c7/0x7c0 [ 31.170939] do_vmi_munmap+0x1f1/0x2b0 [ 31.171439] mmap_region+0x1f9/0x2660 [ 31.171931] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.172459] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.173181] ? __pfx_lock_acquire+0x10/0x10 [ 31.173738] ? __pfx_mmap_region+0x10/0x10 [ 31.174283] ? security_mmap_addr+0x7d/0xa0 [ 31.174826] ? get_unmapped_area+0x1f5/0x3f0 [ 31.175387] do_mmap+0x854/0xf00 [ 31.175832] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.176339] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.176907] ksys_mmap_pgoff+0x3af/0x500 [ 31.177423] do_syscall_64+0x3f/0x90 [ 31.177920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.178576] RIP: 0033:0x7f383ec45d82 [ 31.179039] 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 [ 31.181228] RSP: 002b:00007fff6275eac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.182153] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f383ec45d82 [ 31.183025] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f383e07f000 [ 31.183891] RBP: 00007f383e07f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.184755] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582df312ec0 [ 31.185618] R13: 00007fff6275eae0 R14: 00007fff6275eb10 R15: 00007fff6275ee70 [ 31.186518] [ 31.186818] [ 31.187040] Allocated by task 213: [ 31.187477] kasan_save_stack+0x22/0x50 [ 31.187995] kasan_set_track+0x25/0x30 [ 31.188510] __kasan_slab_alloc+0x59/0x70 [ 31.189040] kmem_cache_alloc+0x16b/0x370 [ 31.189567] vm_area_dup+0x20/0x160 [ 31.190046] __split_vma+0x170/0x950 [ 31.190524] split_vma+0xc6/0x110 [ 31.190972] mprotect_fixup+0x8d2/0xb30 [ 31.191487] do_mprotect_pkey+0x87e/0xd40 [ 31.192031] __x64_sys_mprotect+0x78/0xc0 [ 31.192569] do_syscall_64+0x3f/0x90 [ 31.193060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.193750] [ 31.193973] Freed by task 213: [ 31.194378] kasan_save_stack+0x22/0x50 [ 31.194896] kasan_set_track+0x25/0x30 [ 31.195398] kasan_save_free_info+0x2b/0x50 [ 31.195951] __kasan_slab_free+0x10a/0x190 [ 31.196501] kmem_cache_free+0x10d/0x4d0 [ 31.197020] rcu_core+0x8c8/0x2860 [ 31.197470] __do_softirq+0x1b7/0x7d4 [ 31.197970] [ 31.198193] Last potentially related work creation: [ 31.198801] kasan_save_stack+0x22/0x50 [ 31.199311] __kasan_record_aux_stack+0x8e/0xa0 [ 31.199898] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.200555] remove_vma+0x139/0x170 [ 31.201018] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.201598] do_vmi_munmap+0x1f1/0x2b0 [ 31.202110] __vm_munmap+0x138/0x3a0 [ 31.202592] __x64_sys_munmap+0x59/0x80 [ 31.203101] do_syscall_64+0x3f/0x90 [ 31.203590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.204248] [ 31.204466] The buggy address belongs to the object at ffff88800cc1f1d0 [ 31.204466] which belongs to the cache vm_area_struct of size 168 [ 31.205994] The buggy address is located 88 bytes inside of [ 31.205994] freed 168-byte region [ffff88800cc1f1d0, ffff88800cc1f278) [ 31.207454] [ 31.207678] The buggy address belongs to the physical page: [ 31.208370] page:00000000f1cb4720 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc1f [ 31.209513] memcg:ffff8880183ac901 [ 31.209966] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.210628] page_type: 0xffffffff() [ 31.211088] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.212027] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880183ac901 [ 31.212959] page dumped because: kasan: bad access detected [ 31.213644] [ 31.213878] Memory state around the buggy address: [ 31.214481] ffff88800cc1f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.215365] ffff88800cc1f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.216245] >ffff88800cc1f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.217123] ^ [ 31.217697] ffff88800cc1f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.218599] ffff88800cc1f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.219478] ================================================================== [ 31.220480] Disabling lock debugging due to kernel taint [ 33.068759] BUG: Bad rss-counter state mm:0000000056fdcffd type:MM_FILEPAGES val:33 [ 33.070001] BUG: Bad rss-counter state mm:0000000056fdcffd type:MM_ANONPAGES val:22 [ 33.434458] BUG: Bad rss-counter state mm:00000000f529a9cc type:MM_FILEPAGES val:33 [ 33.435777] BUG: Bad rss-counter state mm:00000000f529a9cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4100' (ECDSA) to the list of known hosts. 2023/06/19 22:35:19 fuzzer started 2023/06/19 22:35:19 dialing manager at localhost:44161 2023/06/19 22:35:19 checking machine... 2023/06/19 22:35:19 checking revisions... [ 34.147932] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:35:19 testing simple program... [ 34.201669] cgroup: Unknown subsys name 'net' [ 34.253186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:35:18 Registers: info registers vcpu 0 RAX=0000000000000009 RBX=0000000000000009 RCX=0000000000000d68 RDX=000000000000003d RSI=000055e91773ff08 RDI=00007ffea504b029 RBP=0000000000000d68 RSP=00007ffea504a570 R8 =0000000000000000 R9 =00007ffea504ac20 R10=00007ffea504b020 R11=0000000000000000 R12=00007f55810c88a0 R13=00007ffea504ab30 R14=0000000000000009 R15=000055e91773ff08 RIP=00007f5580f8bc34 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f558073e900 00000000 00000000 GS =0000 0000000000000000 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=00007f557fc5f038 CR3=000000000f17a000 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=25252525252525252525252525252525 XMM01=00000000ff00ff000000000000000000 XMM02=00000000ff0000000000000000000000 XMM03=006c616e72756f6a2f646d6574737973 XMM04=858a66ce5051c24d00000000000ae988 XMM05=fd458105f084f8400000000000135d48 XMM06=4fda316b135da52b0000000000134b38 XMM07=fb795ef6d65770560000000000125158 XMM08=4c5359530069253d595449524f495250 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f7b49864618 CR3=0000000014148000 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=35333a3232203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303132 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000