syzkaller login: [ 32.149357] BUG: Bad rss-counter state mm:00000000017fd052 type:MM_FILEPAGES val:33 [ 32.151097] BUG: Bad rss-counter state mm:00000000017fd052 type:MM_ANONPAGES val:22 [ 32.321493] ================================================================== [ 32.322432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.323359] Read of size 8 at addr ffff8880100d9d08 by task sshd/221 [ 32.324117] [ 32.324339] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.325304] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.326302] Call Trace: [ 32.326619] [ 32.326914] dump_stack_lvl+0x91/0xf0 [ 32.327401] print_report+0xcc/0x620 [ 32.327881] ? __virt_addr_valid+0x102/0x340 [ 32.328428] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.329045] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.329654] kasan_report+0xbe/0xf0 [ 32.330131] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.330746] vma_interval_tree_remove+0xc75/0xec0 [ 32.331357] vma_prepare+0xc54/0x11a0 [ 32.331836] __split_vma+0x5af/0x950 [ 32.332310] ? __pfx___split_vma+0x10/0x10 [ 32.332839] ? find_held_lock+0x2c/0x110 [ 32.333359] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.333928] ? lock_is_held_type+0x9f/0x120 [ 32.334467] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.335072] ? mtree_range_walk+0x632/0x900 [ 32.335626] ? mas_walk+0x5c7/0x7c0 [ 32.336098] do_vmi_munmap+0x1f1/0x2b0 [ 32.336588] mmap_region+0x1f9/0x2660 [ 32.337102] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.337618] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.338355] ? __pfx_lock_acquire+0x10/0x10 [ 32.338893] ? __pfx_mmap_region+0x10/0x10 [ 32.339427] ? security_mmap_addr+0x7d/0xa0 [ 32.339956] ? get_unmapped_area+0x1f5/0x3f0 [ 32.340508] do_mmap+0x854/0xf00 [ 32.340947] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.341445] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.342020] ksys_mmap_pgoff+0x3af/0x500 [ 32.342551] do_syscall_64+0x3f/0x90 [ 32.343040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.343716] RIP: 0033:0x7fd4f7723d82 [ 32.344209] 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 [ 32.346221] RSP: 002b:00007ffda7593a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.347076] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd4f7723d82 [ 32.347876] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4f6b5d000 [ 32.348723] RBP: 00007fd4f6b5d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.349594] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d2026ff70 [ 32.350535] R13: 00007ffda7593a80 R14: 00007ffda7593ab0 R15: 00007ffda7593e10 [ 32.351421] [ 32.351729] [ 32.351952] Allocated by task 214: [ 32.352402] kasan_save_stack+0x22/0x50 [ 32.352922] kasan_set_track+0x25/0x30 [ 32.353438] __kasan_slab_alloc+0x59/0x70 [ 32.353999] kmem_cache_alloc+0x16b/0x370 [ 32.354530] vm_area_dup+0x20/0x160 [ 32.355011] __split_vma+0x170/0x950 [ 32.355491] split_vma+0xc6/0x110 [ 32.355926] mprotect_fixup+0x8d2/0xb30 [ 32.356452] do_mprotect_pkey+0x87e/0xd40 [ 32.356975] __x64_sys_mprotect+0x78/0xc0 [ 32.357500] do_syscall_64+0x3f/0x90 [ 32.357978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.358620] [ 32.358834] Freed by task 214: [ 32.359219] kasan_save_stack+0x22/0x50 [ 32.359714] kasan_set_track+0x25/0x30 [ 32.360193] kasan_save_free_info+0x2b/0x50 [ 32.360725] __kasan_slab_free+0x10a/0x190 [ 32.361259] kmem_cache_free+0x10d/0x4d0 [ 32.361765] rcu_core+0x8c8/0x2860 [ 32.362232] __do_softirq+0x1b7/0x7d4 [ 32.362709] [ 32.362925] Last potentially related work creation: [ 32.363496] kasan_save_stack+0x22/0x50 [ 32.363998] __kasan_record_aux_stack+0x8e/0xa0 [ 32.364564] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.365196] remove_vma+0x139/0x170 [ 32.365638] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.366196] do_vmi_munmap+0x1f1/0x2b0 [ 32.366677] __vm_munmap+0x138/0x3a0 [ 32.367146] __x64_sys_munmap+0x59/0x80 [ 32.367661] do_syscall_64+0x3f/0x90 [ 32.368142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.368789] [ 32.369004] Second to last potentially related work creation: [ 32.369704] kasan_save_stack+0x22/0x50 [ 32.370235] __kasan_record_aux_stack+0x8e/0xa0 [ 32.370815] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.371491] remove_vma+0x139/0x170 [ 32.371952] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.372511] do_vmi_munmap+0x1f1/0x2b0 [ 32.373027] mmap_region+0x1f9/0x2660 [ 32.373532] do_mmap+0x854/0xf00 [ 32.373985] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.374497] ksys_mmap_pgoff+0x7d/0x500 [ 32.375014] do_syscall_64+0x3f/0x90 [ 32.375517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.376175] [ 32.376390] The buggy address belongs to the object at ffff8880100d9cb0 [ 32.376390] which belongs to the cache vm_area_struct of size 168 [ 32.377849] The buggy address is located 88 bytes inside of [ 32.377849] freed 168-byte region [ffff8880100d9cb0, ffff8880100d9d58) [ 32.379267] [ 32.379480] The buggy address belongs to the physical page: [ 32.380113] page:0000000026143db5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100d9 [ 32.381227] memcg:ffff88801442bf01 [ 32.381676] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.382364] page_type: 0xffffffff() [ 32.382842] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 32.383787] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801442bf01 [ 32.384706] page dumped because: kasan: bad access detected [ 32.385367] [ 32.385585] Memory state around the buggy address: [ 32.386183] ffff8880100d9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.387044] ffff8880100d9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.387948] >ffff8880100d9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.388820] ^ [ 32.389257] ffff8880100d9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.390183] ffff8880100d9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.391052] ================================================================== [ 32.392032] Disabling lock debugging due to kernel taint [ 34.432682] BUG: Bad rss-counter state mm:000000000c8fe6d1 type:MM_FILEPAGES val:33 [ 34.433842] BUG: Bad rss-counter state mm:000000000c8fe6d1 type:MM_ANONPAGES val:22 [ 34.833304] BUG: Bad rss-counter state mm:000000004b28c206 type:MM_FILEPAGES val:33 [ 34.834350] BUG: Bad rss-counter state mm:000000004b28c206 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37445' (ECDSA) to the list of known hosts. 2023/06/20 06:43:01 fuzzer started 2023/06/20 06:43:01 dialing manager at localhost:44161 2023/06/20 06:43:01 checking machine... 2023/06/20 06:43:01 checking revisions... [ 35.572698] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:43:01 testing simple program... [ 35.622062] cgroup: Unknown subsys name 'net' [ 35.675059] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:42:59 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=dffffc0000000000 RCX=ffffffff8162e143 RDX=fffff940000d46e9 RSI=0000000000000008 RDI=ffffea00006a3740 RBP=ffff888018e3de00 RSP=ffff888019da79e0 R8 =0000000000000000 R9 =fffff940000d46e8 R10=ffffea00006a3747 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=ffff888019da7c00 R15=ffffea00006a3740 RIP=ffffffff8180efb5 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 00007f5fa0d2c900 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=0000558a94cc8954 CR3=000000001c9e8000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=0000000000000000000000000000ffff XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=6120776f6c6c6120746f6e206f740000 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f0aeb32b000 CR3=000000000c6f6000 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=810881886553a98ae54e0109f374e65c XMM02=000000000011d270ec2efd57dc4c00df XMM03=0000000000124b18908840f39c8b3fc7 XMM04=083c3816a2fcc83b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000135aa8 XMM06=79cbb00a1af0583500000000001348f0 XMM07=e042d86d42eb936e0000000000124d98 XMM08=908840f39c8b3fc7000000000011d2d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000