syzkaller login: [ 30.990902] BUG: Bad rss-counter state mm:000000005c65472e type:MM_FILEPAGES val:33 [ 30.991817] BUG: Bad rss-counter state mm:000000005c65472e type:MM_ANONPAGES val:22 [ 31.150561] ================================================================== [ 31.151491] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.152449] Read of size 8 at addr ffff88800e3af058 by task sshd/221 [ 31.153241] [ 31.153459] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.154467] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.155452] Call Trace: [ 31.155773] [ 31.156099] dump_stack_lvl+0x91/0xf0 [ 31.156590] print_report+0xcc/0x620 [ 31.157087] ? __virt_addr_valid+0x102/0x340 [ 31.157653] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.158275] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.158887] kasan_report+0xbe/0xf0 [ 31.159373] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.159990] vma_interval_tree_remove+0xc75/0xec0 [ 31.160588] vma_prepare+0xc54/0x11a0 [ 31.161086] __split_vma+0x5af/0x950 [ 31.161563] ? __pfx___split_vma+0x10/0x10 [ 31.162090] ? find_held_lock+0x2c/0x110 [ 31.162610] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.163177] ? lock_is_held_type+0x9f/0x120 [ 31.163713] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.164326] ? mtree_range_walk+0x632/0x900 [ 31.164882] ? mas_walk+0x5c7/0x7c0 [ 31.165381] do_vmi_munmap+0x1f1/0x2b0 [ 31.165877] mmap_region+0x1f9/0x2660 [ 31.166359] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.166867] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.167584] ? __pfx_lock_acquire+0x10/0x10 [ 31.168119] ? __pfx_mmap_region+0x10/0x10 [ 31.168647] ? security_mmap_addr+0x7d/0xa0 [ 31.169191] ? get_unmapped_area+0x1f5/0x3f0 [ 31.169743] do_mmap+0x854/0xf00 [ 31.170182] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.170684] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.171247] ksys_mmap_pgoff+0x3af/0x500 [ 31.171752] do_syscall_64+0x3f/0x90 [ 31.172230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.172882] RIP: 0033:0x7fa4a0493d82 [ 31.173355] 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 [ 31.175483] RSP: 002b:00007ffd9e6f8668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.176391] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4a0493d82 [ 31.177247] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa49f8cd000 [ 31.178096] RBP: 00007fa49f8cd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.178933] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e97738b20 [ 31.179770] R13: 00007ffd9e6f8680 R14: 00007ffd9e6f86b0 R15: 00007ffd9e6f8a10 [ 31.180618] [ 31.180910] [ 31.181142] Allocated by task 214: [ 31.181565] kasan_save_stack+0x22/0x50 [ 31.182067] kasan_set_track+0x25/0x30 [ 31.182556] __kasan_slab_alloc+0x59/0x70 [ 31.183089] kmem_cache_alloc+0x16b/0x370 [ 31.183607] vm_area_dup+0x20/0x160 [ 31.184060] __split_vma+0x170/0x950 [ 31.184527] split_vma+0xc6/0x110 [ 31.184971] mprotect_fixup+0x8d2/0xb30 [ 31.185489] do_mprotect_pkey+0x87e/0xd40 [ 31.186009] __x64_sys_mprotect+0x78/0xc0 [ 31.186529] do_syscall_64+0x3f/0x90 [ 31.187008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.187646] [ 31.187862] Freed by task 214: [ 31.188256] kasan_save_stack+0x22/0x50 [ 31.188759] kasan_set_track+0x25/0x30 [ 31.189267] kasan_save_free_info+0x2b/0x50 [ 31.189800] __kasan_slab_free+0x10a/0x190 [ 31.190333] kmem_cache_free+0x10d/0x4d0 [ 31.190843] rcu_core+0x8c8/0x2860 [ 31.191292] __do_softirq+0x1b7/0x7d4 [ 31.191766] [ 31.191988] Last potentially related work creation: [ 31.192580] kasan_save_stack+0x22/0x50 [ 31.193087] __kasan_record_aux_stack+0x8e/0xa0 [ 31.193663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.194308] remove_vma+0x139/0x170 [ 31.194764] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.195405] do_vmi_munmap+0x1f1/0x2b0 [ 31.195897] __vm_munmap+0x138/0x3a0 [ 31.196365] __x64_sys_munmap+0x59/0x80 [ 31.196861] do_syscall_64+0x3f/0x90 [ 31.197365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198005] [ 31.198221] The buggy address belongs to the object at ffff88800e3af000 [ 31.198221] which belongs to the cache vm_area_struct of size 168 [ 31.199678] The buggy address is located 88 bytes inside of [ 31.199678] freed 168-byte region [ffff88800e3af000, ffff88800e3af0a8) [ 31.201105] [ 31.201328] The buggy address belongs to the physical page: [ 31.202002] page:0000000036f54f2d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3af [ 31.203095] memcg:ffff88800e21ec01 [ 31.203525] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.204218] page_type: 0xffffffff() [ 31.204671] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.205627] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e21ec01 [ 31.206555] page dumped because: kasan: bad access detected [ 31.207215] [ 31.207433] Memory state around the buggy address: [ 31.208018] ffff88800e3aef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.208879] ffff88800e3aef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.209747] >ffff88800e3af000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.210608] ^ [ 31.211349] ffff88800e3af080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.212221] ffff88800e3af100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.213087] ================================================================== [ 31.214177] Disabling lock debugging due to kernel taint [ 33.360890] BUG: Bad rss-counter state mm:000000000c253e40 type:MM_FILEPAGES val:33 [ 33.361778] BUG: Bad rss-counter state mm:000000000c253e40 type:MM_ANONPAGES val:22 [ 33.838177] BUG: Bad rss-counter state mm:00000000da2bd989 type:MM_FILEPAGES val:33 [ 33.839349] BUG: Bad rss-counter state mm:00000000da2bd989 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7586' (ECDSA) to the list of known hosts. 2023/06/21 07:44:29 fuzzer started 2023/06/21 07:44:29 dialing manager at localhost:36067 2023/06/21 07:44:29 checking machine... 2023/06/21 07:44:29 checking revisions... [ 34.552786] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:44:29 testing simple program... [ 34.605079] cgroup: Unknown subsys name 'net' [ 34.645563] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:44:29 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=00007fc9f7cf8c64 RCX=ffffffff813a0add RDX=ffff88801467d1c0 RSI=0000000000000000 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff888015867570 R8 =0000000000000006 R9 =00007fc9f7cf8c64 R10=ffffffffffffffff R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88801467d1c0 R15=0000000000092cc0 RIP=ffffffff814c086b 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 00007fc9f743f900 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=00007fc9f684c780 CR3=000000000c83c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7f024419244908fc00000000000ae988 XMM05=0284859739d40df90000000000132c20 XMM06=59d5b690e0af863b0000000000131ab8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff856d84a0 RCX=ffffffff812e0126 RDX=00000000ffffffff RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=1ffff110011c6f87 RSP=ffff888008e37c28 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffffffff856d84a8 R13=ffffffff856d84b0 R14=ffffffff813782f8 R15=ffff88800d952280 RIP=ffffffff8180fed8 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=00007fffc327f000 CR3=000000000d8f6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000