syzkaller login: [ 31.966878] BUG: Bad rss-counter state mm:00000000fe6a18f0 type:MM_FILEPAGES val:33 [ 31.968108] BUG: Bad rss-counter state mm:00000000fe6a18f0 type:MM_ANONPAGES val:22 [ 32.129458] ================================================================== [ 32.130400] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.131347] Read of size 8 at addr ffff88800ebd33f8 by task sshd/220 [ 32.132206] [ 32.132432] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.133310] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.134341] Call Trace: [ 32.134664] [ 32.134950] dump_stack_lvl+0x91/0xf0 [ 32.135449] print_report+0xcc/0x620 [ 32.135935] ? __virt_addr_valid+0x102/0x340 [ 32.136495] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.137117] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.137748] kasan_report+0xbe/0xf0 [ 32.138226] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.138848] vma_interval_tree_remove+0xc75/0xec0 [ 32.139453] vma_prepare+0xc54/0x11a0 [ 32.139941] __split_vma+0x5af/0x950 [ 32.140410] ? __pfx___split_vma+0x10/0x10 [ 32.140936] ? find_held_lock+0x2c/0x110 [ 32.141462] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.142041] ? lock_is_held_type+0x9f/0x120 [ 32.142597] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.143207] ? mtree_range_walk+0x632/0x900 [ 32.143751] ? mas_walk+0x5c7/0x7c0 [ 32.144224] do_vmi_munmap+0x1f1/0x2b0 [ 32.144715] mmap_region+0x1f9/0x2660 [ 32.145199] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.145722] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.146439] ? __pfx_lock_acquire+0x10/0x10 [ 32.146968] ? __pfx_mmap_region+0x10/0x10 [ 32.147500] ? security_mmap_addr+0x7d/0xa0 [ 32.148039] ? get_unmapped_area+0x1f5/0x3f0 [ 32.148586] do_mmap+0x854/0xf00 [ 32.149030] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.149524] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.150092] ksys_mmap_pgoff+0x3af/0x500 [ 32.150595] do_syscall_64+0x3f/0x90 [ 32.151069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.151712] RIP: 0033:0x7fd1c39e6d82 [ 32.152167] 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 [ 32.154288] RSP: 002b:00007ffc38737128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.155214] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1c39e6d82 [ 32.156071] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1c2e20000 [ 32.156930] RBP: 00007fd1c2e20000 R08: 0000000000000009 R09: 0000000000001000 [ 32.157805] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2f1e92d90 [ 32.158676] R13: 00007ffc38737140 R14: 00007ffc38737170 R15: 00007ffc387374d0 [ 32.159558] [ 32.159860] [ 32.160075] Allocated by task 213: [ 32.160516] kasan_save_stack+0x22/0x50 [ 32.161035] kasan_set_track+0x25/0x30 [ 32.161539] __kasan_slab_alloc+0x59/0x70 [ 32.162098] kmem_cache_alloc+0x16b/0x370 [ 32.162609] vm_area_dup+0x20/0x160 [ 32.163066] __split_vma+0x170/0x950 [ 32.163539] split_vma+0xc6/0x110 [ 32.163974] mprotect_fixup+0x8d2/0xb30 [ 32.164474] do_mprotect_pkey+0x87e/0xd40 [ 32.165003] __x64_sys_mprotect+0x78/0xc0 [ 32.165533] do_syscall_64+0x3f/0x90 [ 32.166024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.166684] [ 32.166903] Freed by task 203: [ 32.167293] kasan_save_stack+0x22/0x50 [ 32.167791] kasan_set_track+0x25/0x30 [ 32.168293] kasan_save_free_info+0x2b/0x50 [ 32.168835] __kasan_slab_free+0x10a/0x190 [ 32.169369] kmem_cache_free+0x10d/0x4d0 [ 32.169881] rcu_core+0x8c8/0x2860 [ 32.170323] __do_softirq+0x1b7/0x7d4 [ 32.170799] [ 32.171014] Last potentially related work creation: [ 32.171593] kasan_save_stack+0x22/0x50 [ 32.172100] __kasan_record_aux_stack+0x8e/0xa0 [ 32.172670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.173317] remove_vma+0x139/0x170 [ 32.173783] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.174335] do_vmi_munmap+0x1f1/0x2b0 [ 32.174815] __vm_munmap+0x138/0x3a0 [ 32.175279] __x64_sys_munmap+0x59/0x80 [ 32.175777] do_syscall_64+0x3f/0x90 [ 32.176246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.176886] [ 32.177099] The buggy address belongs to the object at ffff88800ebd33a0 [ 32.177099] which belongs to the cache vm_area_struct of size 168 [ 32.178568] The buggy address is located 88 bytes inside of [ 32.178568] freed 168-byte region [ffff88800ebd33a0, ffff88800ebd3448) [ 32.179967] [ 32.180203] The buggy address belongs to the physical page: [ 32.180879] page:0000000046e38839 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebd3 [ 32.181987] memcg:ffff88801a023301 [ 32.182423] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.183073] page_type: 0xffffffff() [ 32.183537] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.184477] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a023301 [ 32.185398] page dumped because: kasan: bad access detected [ 32.186079] [ 32.186293] Memory state around the buggy address: [ 32.186887] ffff88800ebd3280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.187751] ffff88800ebd3300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.188603] >ffff88800ebd3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.189446] ^ [ 32.190296] ffff88800ebd3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.191143] ffff88800ebd3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.191987] ================================================================== [ 32.193224] Disabling lock debugging due to kernel taint [ 34.730952] sshd (220) used greatest stack depth: 23704 bytes left [ 34.732084] BUG: Bad rss-counter state mm:0000000047f5e43b type:MM_FILEPAGES val:33 [ 34.733001] BUG: Bad rss-counter state mm:0000000047f5e43b type:MM_ANONPAGES val:22 [ 35.342532] BUG: Bad rss-counter state mm:00000000bc829d29 type:MM_FILEPAGES val:33 [ 35.343705] BUG: Bad rss-counter state mm:00000000bc829d29 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27767' (ECDSA) to the list of known hosts. 2023/06/19 11:06:00 fuzzer started 2023/06/19 11:06:01 dialing manager at localhost:44161 2023/06/19 11:06:01 checking machine... 2023/06/19 11:06:01 checking revisions... [ 36.018590] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:06:01 testing simple program... [ 36.065838] cgroup: Unknown subsys name 'net' [ 36.107668] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:05:59 Registers: info registers vcpu 0 RAX=00000017707bac48 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000017 RSI=ffff88806ce28140 RDI=0000000000053af0 RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ef8bb R11=0000000000000001 R12=0000000000053af0 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000016 [----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 00007fc22b9d2900 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=00007fc22b9b1020 CR3=000000000ea1c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed10012a5df7 RBX=0000000000000282 RCX=0000000000000000 RDX=ffff888009520000 RSI=ffffffff816513d8 RDI=ffff8880193aa2b0 RBP=1ffff110012a5df7 RSP=ffff88800952efa8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=ffff8880193aa2b0 R13=ffffffff816513d8 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff812d8659 RFL=00000082 [--S----] 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=00007fc22b8a1000 CR3=000000000ea1c000 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=00000000000000000000000000000000 XMM01=0201063c062e7406010658060c040200 XMM02=2e0100000100000001010101000d0efb XMM03=736f702f2e2e0078756e696c2f767379 XMM04=00000000000000000000000000000000 XMM05=682e6e746e69752d746e696474730000 XMM06=736f6c6300006564756c636e692f2e2e XMM07=00737469622f78756e696c2f76737973 XMM08=00737469622f2e2e00737469622f7869 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000