syzkaller login: [ 34.132896] BUG: Bad rss-counter state mm:0000000099b249c9 type:MM_FILEPAGES val:32 [ 34.134152] BUG: Bad rss-counter state mm:0000000099b249c9 type:MM_ANONPAGES val:22 [ 34.277118] ================================================================== [ 34.278033] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.278974] Read of size 8 at addr ffff888019e65968 by task sshd/221 [ 34.279820] [ 34.280165] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.281292] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.282303] Call Trace: [ 34.282632] [ 34.282955] dump_stack_lvl+0x91/0xf0 [ 34.283455] print_report+0xcc/0x620 [ 34.283985] ? __virt_addr_valid+0x102/0x340 [ 34.284552] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.285198] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.285819] kasan_report+0xbe/0xf0 [ 34.286335] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.286973] vma_interval_tree_remove+0xc75/0xec0 [ 34.287574] vma_prepare+0xc54/0x11a0 [ 34.288097] __split_vma+0x5af/0x950 [ 34.288579] ? __pfx___split_vma+0x10/0x10 [ 34.289133] ? find_held_lock+0x2c/0x110 [ 34.289658] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.290243] ? lock_is_held_type+0x9f/0x120 [ 34.290786] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.291412] ? mtree_range_walk+0x632/0x900 [ 34.292025] ? mas_walk+0x5c7/0x7c0 [ 34.292508] do_vmi_munmap+0x1f1/0x2b0 [ 34.293020] mmap_region+0x1f9/0x2660 [ 34.293512] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.294046] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.294774] ? __pfx_lock_acquire+0x10/0x10 [ 34.295329] ? __pfx_mmap_region+0x10/0x10 [ 34.295916] ? security_mmap_addr+0x7d/0xa0 [ 34.296462] ? get_unmapped_area+0x1f5/0x3f0 [ 34.297025] do_mmap+0x854/0xf00 [ 34.297465] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.297990] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.298553] ksys_mmap_pgoff+0x3af/0x500 [ 34.299084] do_syscall_64+0x3f/0x90 [ 34.299561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.300254] RIP: 0033:0x7ff239f52d82 [ 34.300720] 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 [ 34.302899] RSP: 002b:00007fff2204e368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.303814] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff239f52d82 [ 34.304700] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff23938c000 [ 34.305571] RBP: 00007ff23938c000 R08: 0000000000000009 R09: 0000000000001000 [ 34.306434] R10: 0000000000000812 R11: 0000000000000206 R12: 000056081be03f70 [ 34.307305] R13: 00007fff2204e380 R14: 00007fff2204e3b0 R15: 00007fff2204e710 [ 34.308215] [ 34.308508] [ 34.308724] Allocated by task 214: [ 34.309171] kasan_save_stack+0x22/0x50 [ 34.309679] kasan_set_track+0x25/0x30 [ 34.310194] __kasan_slab_alloc+0x59/0x70 [ 34.310733] kmem_cache_alloc+0x16b/0x370 [ 34.311272] vm_area_dup+0x20/0x160 [ 34.311728] __split_vma+0x170/0x950 [ 34.312248] split_vma+0xc6/0x110 [ 34.312688] mprotect_fixup+0x8d2/0xb30 [ 34.313209] do_mprotect_pkey+0x87e/0xd40 [ 34.313735] __x64_sys_mprotect+0x78/0xc0 [ 34.314286] do_syscall_64+0x3f/0x90 [ 34.314759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.315412] [ 34.315633] Freed by task 19: [ 34.316052] kasan_save_stack+0x22/0x50 [ 34.316558] kasan_set_track+0x25/0x30 [ 34.317053] kasan_save_free_info+0x2b/0x50 [ 34.317581] __kasan_slab_free+0x10a/0x190 [ 34.318118] kmem_cache_free+0x10d/0x4d0 [ 34.318624] rcu_core+0x8c8/0x2860 [ 34.319069] __do_softirq+0x1b7/0x7d4 [ 34.319546] [ 34.319762] Last potentially related work creation: [ 34.320397] kasan_save_stack+0x22/0x50 [ 34.320914] __kasan_record_aux_stack+0x8e/0xa0 [ 34.321548] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.322191] remove_vma+0x139/0x170 [ 34.322645] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.323221] do_vmi_munmap+0x1f1/0x2b0 [ 34.323710] __vm_munmap+0x138/0x3a0 [ 34.324211] __x64_sys_munmap+0x59/0x80 [ 34.324714] do_syscall_64+0x3f/0x90 [ 34.325199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.325841] [ 34.326054] The buggy address belongs to the object at ffff888019e65910 [ 34.326054] which belongs to the cache vm_area_struct of size 168 [ 34.327550] The buggy address is located 88 bytes inside of [ 34.327550] freed 168-byte region [ffff888019e65910, ffff888019e659b8) [ 34.328986] [ 34.329204] The buggy address belongs to the physical page: [ 34.329868] page:00000000068f6747 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e65 [ 34.330968] memcg:ffff888014402f01 [ 34.331399] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.332083] page_type: 0xffffffff() [ 34.332529] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.333456] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014402f01 [ 34.334356] page dumped because: kasan: bad access detected [ 34.335029] [ 34.335247] Memory state around the buggy address: [ 34.335852] ffff888019e65800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.336728] ffff888019e65880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.337594] >ffff888019e65900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.338455] ^ [ 34.339247] ffff888019e65980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.340118] ffff888019e65a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.340965] ================================================================== [ 34.341886] Disabling lock debugging due to kernel taint [ 36.307992] BUG: Bad rss-counter state mm:0000000000326a6b type:MM_FILEPAGES val:33 [ 36.309148] BUG: Bad rss-counter state mm:0000000000326a6b type:MM_ANONPAGES val:22 [ 36.793191] BUG: Bad rss-counter state mm:00000000bd23c227 type:MM_FILEPAGES val:33 [ 36.794318] BUG: Bad rss-counter state mm:00000000bd23c227 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57370' (ECDSA) to the list of known hosts. 2023/06/19 13:26:36 fuzzer started 2023/06/19 13:26:36 dialing manager at localhost:44161 2023/06/19 13:26:36 checking machine... 2023/06/19 13:26:36 checking revisions... [ 37.509153] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:26:36 testing simple program... [ 37.547639] cgroup: Unknown subsys name 'net' [ 37.595634] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:26:33 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=ffffffff85652988 RCX=0000000080000100 RDX=1ffffffff0aca531 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800d85f500 RIP=ffffffff814c07f1 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 00007fbb3fd02900 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=00007fff0fda4000 CR3=000000000e26a000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f3151c0 RSI=ffffffff82097a16 RDI=ffff88800f3155b4 RBP=ffff88800935be08 RSP=ffff88800f4570e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=ffff8880090a1000 R13=0000000000000000 R14=ffffea00007246c0 R15=ffffffff87f50100 RIP=ffffffff814c081b 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=00007ff2e85db2d0 CR3=0000000015c46000 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=2035333a36323a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a36323a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000