syzkaller login: [ 160.149383] BUG: Bad rss-counter state mm:0000000042363302 type:MM_FILEPAGES val:33 [ 160.151673] BUG: Bad rss-counter state mm:0000000042363302 type:MM_ANONPAGES val:22 [ 160.277745] ================================================================== [ 160.278523] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 160.279302] Read of size 8 at addr ffff88800e2aaed8 by task sshd/221 [ 160.279948] [ 160.280130] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 160.280986] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 160.281891] Call Trace: [ 160.282156] [ 160.282417] dump_stack_lvl+0x91/0xf0 [ 160.282823] print_report+0xcc/0x620 [ 160.283222] ? __virt_addr_valid+0x102/0x340 [ 160.283680] ? vma_interval_tree_remove+0xc75/0xec0 [ 160.284198] ? vma_interval_tree_remove+0xc75/0xec0 [ 160.284709] kasan_report+0xbe/0xf0 [ 160.285106] ? vma_interval_tree_remove+0xc75/0xec0 [ 160.285614] vma_interval_tree_remove+0xc75/0xec0 [ 160.286116] vma_prepare+0xc54/0x11a0 [ 160.286520] __split_vma+0x5af/0x950 [ 160.286910] ? __pfx___split_vma+0x10/0x10 [ 160.287349] ? find_held_lock+0x2c/0x110 [ 160.287777] do_vmi_align_munmap+0x2ba/0x11f0 [ 160.288253] ? lock_is_held_type+0x9f/0x120 [ 160.288705] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 160.289207] ? mtree_range_walk+0x632/0x900 [ 160.289666] ? mas_walk+0x5c7/0x7c0 [ 160.290064] do_vmi_munmap+0x1f1/0x2b0 [ 160.290483] mmap_region+0x1f9/0x2660 [ 160.290885] ? vm_mmap_pgoff+0x15c/0x3a0 [ 160.291318] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 160.291918] ? __pfx_lock_acquire+0x10/0x10 [ 160.292364] ? __pfx_mmap_region+0x10/0x10 [ 160.292805] ? security_mmap_addr+0x7d/0xa0 [ 160.293258] ? get_unmapped_area+0x1f5/0x3f0 [ 160.293713] do_mmap+0x854/0xf00 [ 160.294084] vm_mmap_pgoff+0x1a6/0x3a0 [ 160.294518] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 160.294990] ksys_mmap_pgoff+0x3af/0x500 [ 160.295414] do_syscall_64+0x3f/0x90 [ 160.295813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 160.296350] RIP: 0033:0x7f7ace068d82 [ 160.296736] 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 [ 160.298521] RSP: 002b:00007ffc1c983ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 160.299278] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ace068d82 [ 160.299981] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7acd4a2000 [ 160.300685] RBP: 00007f7acd4a2000 R08: 0000000000000009 R09: 0000000000001000 [ 160.301394] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb7199af60 [ 160.302097] R13: 00007ffc1c983bc0 R14: 00007ffc1c983bf0 R15: 00007ffc1c983f50 [ 160.302829] [ 160.303073] [ 160.303252] Allocated by task 214: [ 160.303607] kasan_save_stack+0x22/0x50 [ 160.304030] kasan_set_track+0x25/0x30 [ 160.304444] __kasan_slab_alloc+0x59/0x70 [ 160.304878] kmem_cache_alloc+0x16b/0x370 [ 160.305318] vm_area_dup+0x20/0x160 [ 160.305695] __split_vma+0x170/0x950 [ 160.306083] split_vma+0xc6/0x110 [ 160.306453] mprotect_fixup+0x8d2/0xb30 [ 160.306873] do_mprotect_pkey+0x87e/0xd40 [ 160.307321] __x64_sys_mprotect+0x78/0xc0 [ 160.307754] do_syscall_64+0x3f/0x90 [ 160.308148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 160.308680] [ 160.308865] Freed by task 214: [ 160.309194] kasan_save_stack+0x22/0x50 [ 160.309611] kasan_set_track+0x25/0x30 [ 160.310021] kasan_save_free_info+0x2b/0x50 [ 160.310482] __kasan_slab_free+0x10a/0x190 [ 160.310925] kmem_cache_free+0x10d/0x4d0 [ 160.311357] rcu_core+0x8c8/0x2860 [ 160.311724] __do_softirq+0x1b7/0x7d4 [ 160.312123] [ 160.312304] Last potentially related work creation: [ 160.312790] kasan_save_stack+0x22/0x50 [ 160.313201] __kasan_record_aux_stack+0x8e/0xa0 [ 160.313668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 160.314205] remove_vma+0x139/0x170 [ 160.314585] do_vmi_align_munmap+0xd4a/0x11f0 [ 160.315038] do_vmi_munmap+0x1f1/0x2b0 [ 160.315430] __vm_munmap+0x138/0x3a0 [ 160.315805] __x64_sys_munmap+0x59/0x80 [ 160.316208] do_syscall_64+0x3f/0x90 [ 160.316592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 160.317106] [ 160.317281] Second to last potentially related work creation: [ 160.317832] kasan_save_stack+0x22/0x50 [ 160.318238] __kasan_record_aux_stack+0x8e/0xa0 [ 160.318702] __call_rcu_common.constprop.0+0x6a/0xb90 [ 160.319223] remove_vma+0x139/0x170 [ 160.319586] do_vmi_align_munmap+0xd4a/0x11f0 [ 160.320035] do_vmi_munmap+0x1f1/0x2b0 [ 160.320429] mmap_region+0x1f9/0x2660 [ 160.320811] do_mmap+0x854/0xf00 [ 160.321157] vm_mmap_pgoff+0x1a6/0x3a0 [ 160.321549] ksys_mmap_pgoff+0x3af/0x500 [ 160.321957] do_syscall_64+0x3f/0x90 [ 160.322340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 160.322889] [ 160.323065] The buggy address belongs to the object at ffff88800e2aae80 [ 160.323065] which belongs to the cache vm_area_struct of size 168 [ 160.324256] The buggy address is located 88 bytes inside of [ 160.324256] freed 168-byte region [ffff88800e2aae80, ffff88800e2aaf28) [ 160.325389] [ 160.325562] The buggy address belongs to the physical page: [ 160.326101] page:000000001fe0c4ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2aa [ 160.326985] memcg:ffff88800de5b701 [ 160.327332] flags: 0x100000000000200(slab|node=0|zone=1) [ 160.327853] page_type: 0xffffffff() [ 160.328213] raw: 0100000000000200 ffff88800879fc80 ffffea0000255140 dead000000000002 [ 160.328957] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de5b701 [ 160.329693] page dumped because: kasan: bad access detected [ 160.330228] [ 160.330408] Memory state around the buggy address: [ 160.330883] ffff88800e2aad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 160.331579] ffff88800e2aae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 160.332273] >ffff88800e2aae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 160.332964] ^ [ 160.333563] ffff88800e2aaf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 160.334254] ffff88800e2aaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 160.334967] ================================================================== [ 160.335814] Disabling lock debugging due to kernel taint [ 162.283092] BUG: Bad rss-counter state mm:00000000dd99835a type:MM_FILEPAGES val:33 [ 162.284269] BUG: Bad rss-counter state mm:00000000dd99835a type:MM_ANONPAGES val:22 [ 162.672361] BUG: Bad rss-counter state mm:0000000097879259 type:MM_FILEPAGES val:33 [ 162.673424] BUG: Bad rss-counter state mm:0000000097879259 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38539' (ECDSA) to the list of known hosts. 2023/06/19 22:18:41 fuzzer started 2023/06/19 22:18:41 dialing manager at localhost:44161 2023/06/19 22:18:41 checking machine... 2023/06/19 22:18:41 checking revisions... [ 163.394269] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:18:42 testing simple program... [ 163.447618] cgroup: Unknown subsys name 'net' [ 163.487601] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:16:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888018177f01 RSI=ffff888018177f48 RDI=ffff888018177f48 RBP=ffff888018177a18 RSP=ffff888018177950 R8 =0000000000000001 R9 =ffff888018177a00 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888018177a20 R13=ffff888018177a08 R14=ffff888018177f48 R15=ffff8880181779c0 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f242ed18900 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=00007f242f2cd650 CR3=000000001ca40000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=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=00007ffc26d77c58 CR3=0000000015b5e000 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=2031343a38313a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a38313a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000