syzkaller login: [ 30.059651] BUG: Bad rss-counter state mm:00000000f6709fba type:MM_FILEPAGES val:33 [ 30.060843] BUG: Bad rss-counter state mm:00000000f6709fba type:MM_ANONPAGES val:22 [ 30.104309] ================================================================== [ 30.105558] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.106928] Read of size 8 at addr ffff88800dae1c20 by task sshd/220 [ 30.107862] [ 30.108173] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.109255] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.110643] Call Trace: [ 30.111032] [ 30.111374] dump_stack_lvl+0x91/0xf0 [ 30.111965] print_report+0xcc/0x620 [ 30.112558] ? __virt_addr_valid+0x102/0x340 [ 30.113225] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.113968] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.114713] kasan_report+0xbe/0xf0 [ 30.115289] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.116041] vma_interval_tree_remove+0xc75/0xec0 [ 30.116767] vma_prepare+0xc54/0x11a0 [ 30.117279] __split_vma+0x5af/0x950 [ 30.117780] ? __pfx___split_vma+0x10/0x10 [ 30.118342] ? find_held_lock+0x2c/0x110 [ 30.118888] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.119479] ? lock_is_held_type+0x9f/0x120 [ 30.120046] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.120700] ? mtree_range_walk+0x632/0x900 [ 30.121288] ? mas_walk+0x5c7/0x7c0 [ 30.121787] do_vmi_munmap+0x1f1/0x2b0 [ 30.122307] mmap_region+0x1f9/0x2660 [ 30.122818] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.123360] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.124112] ? __pfx_lock_acquire+0x10/0x10 [ 30.124706] ? __pfx_mmap_region+0x10/0x10 [ 30.125270] ? security_mmap_addr+0x7d/0xa0 [ 30.125833] ? get_unmapped_area+0x1f5/0x3f0 [ 30.126414] do_mmap+0x854/0xf00 [ 30.126881] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.127407] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.128029] ksys_mmap_pgoff+0x3af/0x500 [ 30.128580] do_syscall_64+0x3f/0x90 [ 30.129087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.129767] RIP: 0033:0x7f8861bf8d82 [ 30.130257] 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 [ 30.132514] RSP: 002b:00007ffd5c7b1488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.133482] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8861bf8d82 [ 30.134378] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8861032000 [ 30.135283] RBP: 00007f8861032000 R08: 0000000000000009 R09: 0000000000001000 [ 30.136193] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bda9a1af70 [ 30.137125] R13: 00007ffd5c7b14a0 R14: 00007ffd5c7b14d0 R15: 00007ffd5c7b1830 [ 30.138041] [ 30.138355] [ 30.138582] Allocated by task 212: [ 30.139039] kasan_save_stack+0x22/0x50 [ 30.139576] kasan_set_track+0x25/0x30 [ 30.140104] __kasan_slab_alloc+0x59/0x70 [ 30.140664] kmem_cache_alloc+0x16b/0x370 [ 30.141213] vm_area_dup+0x20/0x160 [ 30.141699] __split_vma+0x170/0x950 [ 30.142192] split_vma+0xc6/0x110 [ 30.142661] mprotect_fixup+0x8d2/0xb30 [ 30.143195] do_mprotect_pkey+0x87e/0xd40 [ 30.143748] __x64_sys_mprotect+0x78/0xc0 [ 30.144311] do_syscall_64+0x3f/0x90 [ 30.144819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.145496] [ 30.145724] Freed by task 212: [ 30.146142] kasan_save_stack+0x22/0x50 [ 30.146678] kasan_set_track+0x25/0x30 [ 30.147203] kasan_save_free_info+0x2b/0x50 [ 30.147770] __kasan_slab_free+0x10a/0x190 [ 30.148355] kmem_cache_free+0x10d/0x4d0 [ 30.148894] rcu_core+0x8c8/0x2860 [ 30.149368] __do_softirq+0x1b7/0x7d4 [ 30.149910] [ 30.150142] Last potentially related work creation: [ 30.150763] kasan_save_stack+0x22/0x50 [ 30.151303] __kasan_record_aux_stack+0x8e/0xa0 [ 30.151909] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.152600] remove_vma+0x139/0x170 [ 30.153086] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.153674] do_vmi_munmap+0x1f1/0x2b0 [ 30.154190] __vm_munmap+0x138/0x3a0 [ 30.154686] __x64_sys_munmap+0x59/0x80 [ 30.155214] do_syscall_64+0x3f/0x90 [ 30.155714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.156401] [ 30.156631] The buggy address belongs to the object at ffff88800dae1bc8 [ 30.156631] which belongs to the cache vm_area_struct of size 168 [ 30.158178] The buggy address is located 88 bytes inside of [ 30.158178] freed 168-byte region [ffff88800dae1bc8, ffff88800dae1c70) [ 30.159661] [ 30.159893] The buggy address belongs to the physical page: [ 30.160607] page:0000000092663907 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdae1 [ 30.161764] memcg:ffff88800ce3a801 [ 30.162223] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.162967] page_type: 0xffffffff() [ 30.163456] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.164442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce3a801 [ 30.165413] page dumped because: kasan: bad access detected [ 30.166120] [ 30.166350] Memory state around the buggy address: [ 30.166969] ffff88800dae1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.167888] ffff88800dae1b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.168816] >ffff88800dae1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.169722] ^ [ 30.170280] ffff88800dae1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.171195] ffff88800dae1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.172119] ================================================================== [ 30.173233] Disabling lock debugging due to kernel taint [ 31.733775] BUG: Bad rss-counter state mm:0000000041b5f7ca type:MM_FILEPAGES val:33 [ 31.735411] BUG: Bad rss-counter state mm:0000000041b5f7ca type:MM_ANONPAGES val:22 [ 32.204104] BUG: Bad rss-counter state mm:00000000f45918ef type:MM_FILEPAGES val:33 [ 32.205112] BUG: Bad rss-counter state mm:00000000f45918ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41787' (ECDSA) to the list of known hosts. 2023/06/19 17:17:54 fuzzer started 2023/06/19 17:17:54 dialing manager at localhost:44161 2023/06/19 17:17:54 checking machine... 2023/06/19 17:17:54 checking revisions... [ 32.926643] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:17:54 testing simple program... [ 32.974522] cgroup: Unknown subsys name 'net' [ 33.015686] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:17:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff8661f0c8 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=0000000000000001 RDI=0000000000000002 RBP=0000000000000001 RSP=ffff88806ce09a18 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801a2c5ec0 RIP=ffffffff814c0380 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 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=00007ff75302a320 CR3=000000000c4e2000 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=94ad4e15a0786a9f8a4d3a25ee7541e9 XMM02=000000000011c838eff9b2d0a8fce9cb XMM03=000000000011c9082c67c8bc2e329bc3 XMM04=ecaa47d43fddcc0500000000000ae988 XMM05=19e9129bd510f2350000000000133d60 XMM06=509f78ed76f75b4e0000000000132bc8 XMM07=e042d86d42eb936e0000000000123c80 XMM08=7e7d95e9b1d46aae000000000011c908 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000282 RCX=0000000080110010 RDX=0000000000000001 RSI=ffffea00003f4e40 RDI=ffff88800879fc80 RBP=0000000000000000 RSP=ffff88801c9cfa00 R8 =0000000080110010 R9 =0000000000000000 R10=ffffea00003f4e40 R11=0000000000110010 R12=ffff88800879fc80 R13=ffffea00003f4e40 R14=ffff88800879fc80 R15=0000000000000001 RIP=ffffffff818060c6 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 00007f2b2a477900 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=00007ffd65950000 CR3=000000000da7a000 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=6720646572637465733a4d41503d706f 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