syzkaller login: [ 30.076771] BUG: Bad rss-counter state mm:000000003e83010f type:MM_FILEPAGES val:33 [ 30.077998] BUG: Bad rss-counter state mm:000000003e83010f type:MM_ANONPAGES val:22 [ 30.115208] ================================================================== [ 30.115906] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.116621] Read of size 8 at addr ffff888017e5bb38 by task sshd/219 [ 30.117211] [ 30.117381] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.118057] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.118808] Call Trace: [ 30.119056] [ 30.119274] dump_stack_lvl+0x91/0xf0 [ 30.119750] print_report+0xcc/0x620 [ 30.120126] ? __virt_addr_valid+0x102/0x340 [ 30.120551] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.121023] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.121494] kasan_report+0xbe/0xf0 [ 30.121870] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.122361] vma_interval_tree_remove+0xc75/0xec0 [ 30.122833] vma_prepare+0xc54/0x11a0 [ 30.123203] __split_vma+0x5af/0x950 [ 30.123568] ? __pfx___split_vma+0x10/0x10 [ 30.123979] ? find_held_lock+0x2c/0x110 [ 30.124382] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.124821] ? lock_is_held_type+0x9f/0x120 [ 30.125232] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.125699] ? mtree_range_walk+0x632/0x900 [ 30.126139] ? mas_walk+0x5c7/0x7c0 [ 30.126499] do_vmi_munmap+0x1f1/0x2b0 [ 30.126876] mmap_region+0x1f9/0x2660 [ 30.127245] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.127635] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.128182] ? __pfx_lock_acquire+0x10/0x10 [ 30.128589] ? __pfx_mmap_region+0x10/0x10 [ 30.128995] ? security_mmap_addr+0x7d/0xa0 [ 30.129398] ? get_unmapped_area+0x1f5/0x3f0 [ 30.129816] do_mmap+0x854/0xf00 [ 30.130171] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.130553] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.130953] ksys_mmap_pgoff+0x3af/0x500 [ 30.131294] do_syscall_64+0x3f/0x90 [ 30.131636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.132088] RIP: 0033:0x7fe99a741d82 [ 30.132393] 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 [ 30.133847] RSP: 002b:00007ffc7d004308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.134486] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe99a741d82 [ 30.135089] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe999b7b000 [ 30.135683] RBP: 00007fe999b7b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.136251] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ab864f6f60 [ 30.136823] R13: 00007ffc7d004320 R14: 00007ffc7d004350 R15: 00007ffc7d0046b0 [ 30.137430] [ 30.137634] [ 30.137781] Allocated by task 212: [ 30.138079] kasan_save_stack+0x22/0x50 [ 30.138412] kasan_set_track+0x25/0x30 [ 30.138747] __kasan_slab_alloc+0x59/0x70 [ 30.139103] kmem_cache_alloc+0x16b/0x370 [ 30.139452] vm_area_dup+0x20/0x160 [ 30.139756] __split_vma+0x170/0x950 [ 30.140081] split_vma+0xc6/0x110 [ 30.140382] mprotect_fixup+0x8d2/0xb30 [ 30.140720] do_mprotect_pkey+0x87e/0xd40 [ 30.141072] __x64_sys_mprotect+0x78/0xc0 [ 30.141481] do_syscall_64+0x3f/0x90 [ 30.141857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.142310] [ 30.142456] Freed by task 19: [ 30.142713] kasan_save_stack+0x22/0x50 [ 30.143047] kasan_set_track+0x25/0x30 [ 30.143394] kasan_save_free_info+0x2b/0x50 [ 30.143755] __kasan_slab_free+0x10a/0x190 [ 30.144118] kmem_cache_free+0x10d/0x4d0 [ 30.144471] rcu_core+0x8c8/0x2860 [ 30.144767] __do_softirq+0x1b7/0x7d4 [ 30.145081] [ 30.145229] Last potentially related work creation: [ 30.145632] kasan_save_stack+0x22/0x50 [ 30.145995] __kasan_record_aux_stack+0x8e/0xa0 [ 30.146397] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.146848] remove_vma+0x139/0x170 [ 30.147165] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.147552] do_vmi_munmap+0x1f1/0x2b0 [ 30.147889] __vm_munmap+0x138/0x3a0 [ 30.148193] __x64_sys_munmap+0x59/0x80 [ 30.148538] do_syscall_64+0x3f/0x90 [ 30.148863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.149290] [ 30.149433] The buggy address belongs to the object at ffff888017e5bae0 [ 30.149433] which belongs to the cache vm_area_struct of size 168 [ 30.150443] The buggy address is located 88 bytes inside of [ 30.150443] freed 168-byte region [ffff888017e5bae0, ffff888017e5bb88) [ 30.151401] [ 30.151544] The buggy address belongs to the physical page: [ 30.152010] page:000000003c2fd3a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e5b [ 30.152749] memcg:ffff88800e8e8301 [ 30.153054] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.153497] page_type: 0xffffffff() [ 30.153811] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.154436] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8e8301 [ 30.155040] page dumped because: kasan: bad access detected [ 30.155489] [ 30.155633] Memory state around the buggy address: [ 30.156031] ffff888017e5ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.156628] ffff888017e5ba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.157210] >ffff888017e5bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.157813] ^ [ 30.158234] ffff888017e5bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.158813] ffff888017e5bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.159381] ================================================================== [ 30.160091] Disabling lock debugging due to kernel taint [ 32.085990] BUG: Bad rss-counter state mm:000000008fba35c0 type:MM_FILEPAGES val:33 [ 32.086977] BUG: Bad rss-counter state mm:000000008fba35c0 type:MM_ANONPAGES val:22 [ 32.623769] BUG: Bad rss-counter state mm:000000008607d39c type:MM_FILEPAGES val:33 [ 32.624957] BUG: Bad rss-counter state mm:000000008607d39c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27669' (ECDSA) to the list of known hosts. 2023/06/21 04:51:49 fuzzer started 2023/06/21 04:51:49 dialing manager at localhost:36067 2023/06/21 04:51:49 checking machine... 2023/06/21 04:51:49 checking revisions... [ 33.232638] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:51:50 testing simple program... [ 33.277482] cgroup: Unknown subsys name 'net' [ 33.324226] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:51:49 Registers: info registers vcpu 0 RAX=000055e4f9126eb0 RBX=000055e4f9144ed0 RCX=0000000000000013 RDX=0000000000000002 RSI=000055e4f9153ab3 RDI=000055e4f9126eb0 RBP=00007ffdb447b870 RSP=00007ffdb447b808 R8 =000055e4f9153ab3 R9 =00007f68064b6be0 R10=000000000000006f R11=0000000000000246 R12=0000000000000002 R13=000055e4f9153ab4 R14=0000000000000002 R15=0000000000000000 RIP=00007f680645ab24 RFL=00000293 [--S-A-C] 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 00007f6805f04900 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=00007f68064b9650 CR3=0000000019e84000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=692064656c62616e65206562206c6c69 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffff000000ffff0000ffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000400 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000430 RDI=0000000000000000 RBP=0000000000000000 RSP=00007ffdb447b670 R8 =000055e4f9127350 R9 =000055e4f9145721 R10=00007f6805eac010 R11=00007f6805eac016 R12=0000000000000430 R13=000055e4f912cce0 R14=0000000000000000 R15=00007ffdb447b6d8 RIP=00007f68063829d3 RFL=00000246 [---Z-P-] 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 00007f6805f04900 00000000 00000000 GS =0000 0000000000000000 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=00007ffdef543e28 CR3=0000000019e84000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000