syzkaller login: [ 31.153164] BUG: Bad rss-counter state mm:0000000061239161 type:MM_FILEPAGES val:33 [ 31.154589] BUG: Bad rss-counter state mm:0000000061239161 type:MM_ANONPAGES val:22 [ 31.318643] ================================================================== [ 31.319618] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.320783] Read of size 8 at addr ffff88800d89e6b0 by task sshd/221 [ 31.321744] [ 31.322063] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.323190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.324400] Call Trace: [ 31.324803] [ 31.325146] dump_stack_lvl+0x91/0xf0 [ 31.325782] print_report+0xcc/0x620 [ 31.326392] ? __virt_addr_valid+0x102/0x340 [ 31.327074] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.327801] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.328548] kasan_report+0xbe/0xf0 [ 31.329036] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.329672] vma_interval_tree_remove+0xc75/0xec0 [ 31.330282] vma_prepare+0xc54/0x11a0 [ 31.330768] __split_vma+0x5af/0x950 [ 31.331245] ? __pfx___split_vma+0x10/0x10 [ 31.331776] ? find_held_lock+0x2c/0x110 [ 31.332299] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.332871] ? lock_is_held_type+0x9f/0x120 [ 31.333428] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.334049] ? mtree_range_walk+0x632/0x900 [ 31.334605] ? mas_walk+0x5c7/0x7c0 [ 31.335085] do_vmi_munmap+0x1f1/0x2b0 [ 31.335590] mmap_region+0x1f9/0x2660 [ 31.336076] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.336597] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.337357] ? __pfx_lock_acquire+0x10/0x10 [ 31.337902] ? __pfx_mmap_region+0x10/0x10 [ 31.338438] ? security_mmap_addr+0x7d/0xa0 [ 31.338971] ? get_unmapped_area+0x1f5/0x3f0 [ 31.339527] do_mmap+0x854/0xf00 [ 31.339980] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.340486] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.341055] ksys_mmap_pgoff+0x3af/0x500 [ 31.341579] do_syscall_64+0x3f/0x90 [ 31.342066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.342730] RIP: 0033:0x7fc261514d82 [ 31.343193] 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 [ 31.345350] RSP: 002b:00007ffe40617498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.346261] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc261514d82 [ 31.347120] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc26094e000 [ 31.347983] RBP: 00007fc26094e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.348843] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a9951abd90 [ 31.349712] R13: 00007ffe406174b0 R14: 00007ffe406174e0 R15: 00007ffe40617840 [ 31.350576] [ 31.350871] [ 31.351091] Allocated by task 214: [ 31.351531] kasan_save_stack+0x22/0x50 [ 31.352038] kasan_set_track+0x25/0x30 [ 31.352538] __kasan_slab_alloc+0x59/0x70 [ 31.353063] kmem_cache_alloc+0x16b/0x370 [ 31.353586] vm_area_dup+0x20/0x160 [ 31.354043] __split_vma+0x170/0x950 [ 31.354508] split_vma+0xc6/0x110 [ 31.354958] mprotect_fixup+0x8d2/0xb30 [ 31.355464] do_mprotect_pkey+0x87e/0xd40 [ 31.355990] __x64_sys_mprotect+0x78/0xc0 [ 31.356515] do_syscall_64+0x3f/0x90 [ 31.356999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.357672] [ 31.357885] Freed by task 214: [ 31.358292] kasan_save_stack+0x22/0x50 [ 31.358801] kasan_set_track+0x25/0x30 [ 31.359309] kasan_save_free_info+0x2b/0x50 [ 31.359851] __kasan_slab_free+0x10a/0x190 [ 31.360389] kmem_cache_free+0x10d/0x4d0 [ 31.360900] rcu_core+0x8c8/0x2860 [ 31.361365] __do_softirq+0x1b7/0x7d4 [ 31.361851] [ 31.362075] Last potentially related work creation: [ 31.362690] kasan_save_stack+0x22/0x50 [ 31.363200] __kasan_record_aux_stack+0x8e/0xa0 [ 31.363777] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.364430] remove_vma+0x139/0x170 [ 31.364886] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.365450] do_vmi_munmap+0x1f1/0x2b0 [ 31.365938] __vm_munmap+0x138/0x3a0 [ 31.366422] __x64_sys_munmap+0x59/0x80 [ 31.366923] do_syscall_64+0x3f/0x90 [ 31.367408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.368055] [ 31.368272] Second to last potentially related work creation: [ 31.368966] kasan_save_stack+0x22/0x50 [ 31.369488] __kasan_record_aux_stack+0x8e/0xa0 [ 31.370060] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.370709] remove_vma+0x139/0x170 [ 31.371161] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.371725] do_vmi_munmap+0x1f1/0x2b0 [ 31.372210] __vm_munmap+0x138/0x3a0 [ 31.372687] __x64_sys_munmap+0x59/0x80 [ 31.373197] do_syscall_64+0x3f/0x90 [ 31.373675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.374329] [ 31.374547] The buggy address belongs to the object at ffff88800d89e658 [ 31.374547] which belongs to the cache vm_area_struct of size 168 [ 31.376022] The buggy address is located 88 bytes inside of [ 31.376022] freed 168-byte region [ffff88800d89e658, ffff88800d89e700) [ 31.377451] [ 31.377674] The buggy address belongs to the physical page: [ 31.378337] page:000000009ed50ee0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd89e [ 31.379439] memcg:ffff88800ddcd101 [ 31.379869] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.380573] page_type: 0xffffffff() [ 31.381028] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.381964] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddcd101 [ 31.382879] page dumped because: kasan: bad access detected [ 31.383546] [ 31.383765] Memory state around the buggy address: [ 31.384345] ffff88800d89e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.385216] ffff88800d89e600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.386082] >ffff88800d89e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.386951] ^ [ 31.387546] ffff88800d89e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.388414] ffff88800d89e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.389299] ================================================================== [ 31.390543] Disabling lock debugging due to kernel taint [ 34.058090] BUG: Bad rss-counter state mm:000000009d9ba25e type:MM_FILEPAGES val:33 [ 34.059029] BUG: Bad rss-counter state mm:000000009d9ba25e type:MM_ANONPAGES val:22 [ 34.457471] BUG: Bad rss-counter state mm:000000002f80b8e9 type:MM_FILEPAGES val:33 [ 34.458515] BUG: Bad rss-counter state mm:000000002f80b8e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40638' (ECDSA) to the list of known hosts. 2023/06/19 20:10:58 fuzzer started 2023/06/19 20:10:58 dialing manager at localhost:44161 2023/06/19 20:10:58 checking machine... 2023/06/19 20:10:58 checking revisions... [ 35.228916] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:10:58 testing simple program... [ 35.277695] cgroup: Unknown subsys name 'net' [ 35.330939] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:10:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f2ff800 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=ffffea0000379ac0 RDI=ffffffff8452fd53 RBP=ffff88800844e900 RSP=ffff888016657850 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000d000c R12=0000000000000246 R13=ffff88800844e900 R14=ffffea0000379ac0 R15=ffff888010097850 RIP=ffffffff8153432b RFL=00000006 [-----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 00007f256bcb7700 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=00007eff928dae00 CR3=000000000fdaa000 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=2038353a30313a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a30313a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000003 RDI=ffffffff85ba4c60 RBP=ffff8880147e5510 RSP=ffff888014787d10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff8880147e5000 R13=0000000000000000 R14=0000000000000000 R15=ffff888015ea2280 RIP=ffffffff812a0ff4 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 00007f9eeb279900 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=00007f9eeb830618 CR3=000000000eb40000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000