syzkaller login: [ 41.014163] BUG: Bad rss-counter state mm:0000000058a27f63 type:MM_FILEPAGES val:33 [ 41.015053] BUG: Bad rss-counter state mm:0000000058a27f63 type:MM_ANONPAGES val:22 [ 41.153259] ================================================================== [ 41.153870] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.154476] Read of size 8 at addr ffff88800e1d5880 by task sshd/223 [ 41.155928] [ 41.156087] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.156706] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.157307] Call Trace: [ 41.157515] [ 41.157705] dump_stack_lvl+0x91/0xf0 [ 41.158043] print_report+0xcc/0x620 [ 41.158372] ? __virt_addr_valid+0x102/0x340 [ 41.160388] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.160815] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.161226] kasan_report+0xbe/0xf0 [ 41.161548] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.161954] vma_interval_tree_remove+0xc75/0xec0 [ 41.162353] vma_prepare+0xc54/0x11a0 [ 41.162674] __split_vma+0x5af/0x950 [ 41.163133] ? __pfx___split_vma+0x10/0x10 [ 41.164427] ? find_held_lock+0x2c/0x110 [ 41.166443] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.168309] ? lock_is_held_type+0x9f/0x120 [ 41.169839] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.171426] ? mtree_range_walk+0x632/0x900 [ 41.172757] ? mas_walk+0x5c7/0x7c0 [ 41.173886] do_vmi_munmap+0x1f1/0x2b0 [ 41.175074] mmap_region+0x1f9/0x2660 [ 41.176077] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.177185] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.178759] ? __pfx_lock_acquire+0x10/0x10 [ 41.180573] ? __pfx_mmap_region+0x10/0x10 [ 41.184588] ? security_mmap_addr+0x7d/0xa0 [ 41.185881] ? get_unmapped_area+0x1f5/0x3f0 [ 41.187059] do_mmap+0x854/0xf00 [ 41.187927] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.188903] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.191000] ksys_mmap_pgoff+0x3af/0x500 [ 41.191324] do_syscall_64+0x3f/0x90 [ 41.191630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.192037] RIP: 0033:0x7f0e58864d82 [ 41.194821] 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 [ 41.196275] RSP: 002b:00007ffe03c07178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.196886] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e58864d82 [ 41.197463] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e57c9e000 [ 41.198031] RBP: 00007f0e57c9e000 R08: 0000000000000009 R09: 0000000000001000 [ 41.198599] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565480123ec0 [ 41.199250] R13: 00007ffe03c07190 R14: 00007ffe03c071c0 R15: 00007ffe03c07520 [ 41.199824] [ 41.200020] [ 41.200166] Allocated by task 214: [ 41.200460] kasan_save_stack+0x22/0x50 [ 41.200828] kasan_set_track+0x25/0x30 [ 41.201164] __kasan_slab_alloc+0x59/0x70 [ 41.202994] kmem_cache_alloc+0x16b/0x370 [ 41.205110] vm_area_dup+0x20/0x160 [ 41.206258] __split_vma+0x170/0x950 [ 41.207350] split_vma+0xc6/0x110 [ 41.208342] mprotect_fixup+0x8d2/0xb30 [ 41.209471] do_mprotect_pkey+0x87e/0xd40 [ 41.210713] __x64_sys_mprotect+0x78/0xc0 [ 41.212167] do_syscall_64+0x3f/0x90 [ 41.213254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.214898] [ 41.215621] Freed by task 214: [ 41.216600] kasan_save_stack+0x22/0x50 [ 41.217805] kasan_set_track+0x25/0x30 [ 41.218963] kasan_save_free_info+0x2b/0x50 [ 41.220181] __kasan_slab_free+0x10a/0x190 [ 41.221451] kmem_cache_free+0x10d/0x4d0 [ 41.222648] rcu_core+0x8c8/0x2860 [ 41.223699] __do_softirq+0x1b7/0x7d4 [ 41.224819] [ 41.225308] Last potentially related work creation: [ 41.226737] kasan_save_stack+0x22/0x50 [ 41.227900] __kasan_record_aux_stack+0x8e/0xa0 [ 41.229272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.230694] remove_vma+0x139/0x170 [ 41.231781] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.233045] do_vmi_munmap+0x1f1/0x2b0 [ 41.234142] __vm_munmap+0x138/0x3a0 [ 41.235178] __x64_sys_munmap+0x59/0x80 [ 41.236271] do_syscall_64+0x3f/0x90 [ 41.237274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.238644] [ 41.239119] Second to last potentially related work creation: [ 41.240513] kasan_save_stack+0x22/0x50 [ 41.241553] __kasan_record_aux_stack+0x8e/0xa0 [ 41.242754] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.244205] remove_vma+0x139/0x170 [ 41.245164] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.246347] do_vmi_munmap+0x1f1/0x2b0 [ 41.247404] mmap_region+0x1f9/0x2660 [ 41.248396] do_mmap+0x854/0xf00 [ 41.249355] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.250447] ksys_mmap_pgoff+0x3af/0x500 [ 41.251534] do_syscall_64+0x3f/0x90 [ 41.252541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.253949] [ 41.254358] The buggy address belongs to the object at ffff88800e1d5828 [ 41.254358] which belongs to the cache vm_area_struct of size 168 [ 41.257678] The buggy address is located 88 bytes inside of [ 41.257678] freed 168-byte region [ffff88800e1d5828, ffff88800e1d58d0) [ 41.260780] [ 41.261266] The buggy address belongs to the physical page: [ 41.262737] page:0000000080bb90fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1d5 [ 41.265241] memcg:ffff88800e052c01 [ 41.266158] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.267699] page_type: 0xffffffff() [ 41.268678] raw: 0100000000000200 ffff88800879fc80 ffffea00003872c0 dead000000000005 [ 41.270807] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e052c01 [ 41.272825] page dumped because: kasan: bad access detected [ 41.274324] [ 41.274741] Memory state around the buggy address: [ 41.276096] ffff88800e1d5780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 41.278047] ffff88800e1d5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.280016] >ffff88800e1d5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.281937] ^ [ 41.282777] ffff88800e1d5900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.284704] ffff88800e1d5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 41.286655] ================================================================== [ 41.302879] Disabling lock debugging due to kernel taint [ 43.478575] BUG: Bad rss-counter state mm:000000002dc04683 type:MM_FILEPAGES val:33 [ 43.483609] BUG: Bad rss-counter state mm:000000002dc04683 type:MM_ANONPAGES val:22 [ 44.569341] BUG: Bad rss-counter state mm:000000001f33eb08 type:MM_FILEPAGES val:33 [ 44.570002] BUG: Bad rss-counter state mm:000000001f33eb08 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35977' (ECDSA) to the list of known hosts. 2023/06/20 10:08:07 fuzzer started 2023/06/20 10:08:08 dialing manager at localhost:44161 2023/06/20 10:08:08 checking machine... 2023/06/20 10:08:08 checking revisions... [ 45.370668] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:08:08 testing simple program... [ 45.448633] cgroup: Unknown subsys name 'net' [ 45.501326] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:07:58 Registers: info registers vcpu 0 RAX=1ffff110034619db RBX=ffff88801a30cea8 RCX=1ffff1100345d660 RDX=dffffc0000000000 RSI=ffff88801a2fc8e0 RDI=ffff88801a30ced8 RBP=ffff888013f768c8 RSP=ffff88800fcff828 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88801a2fc8a0 R13=0000000000000000 R14=ffff88800d562e88 R15=ffff88800d562e40 RIP=ffffffff818474fe RFL=00000046 [---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 00007fd3d3256900 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=00007fc830621328 CR3=00000000096fc000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=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=00007ff5d9789350 CR3=000000000c73c000 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=2037303a38303a3031203032206e754a XMM01=5d3230303037352e34342020205b203a XMM02=415f4d4d3a6570797420383062653333 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a38303a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000