syzkaller login: [ 31.735289] BUG: Bad rss-counter state mm:00000000c3224593 type:MM_FILEPAGES val:33 [ 31.736629] BUG: Bad rss-counter state mm:00000000c3224593 type:MM_ANONPAGES val:22 [ 31.776535] ================================================================== [ 31.777769] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.778896] Read of size 8 at addr ffff88800ee8c3f8 by task sshd/221 [ 31.779881] [ 31.780156] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.781183] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.782310] Call Trace: [ 31.782688] [ 31.783038] dump_stack_lvl+0x91/0xf0 [ 31.783644] print_report+0xcc/0x620 [ 31.784212] ? __virt_addr_valid+0x102/0x340 [ 31.784855] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.785491] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.786257] kasan_report+0xbe/0xf0 [ 31.786770] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.787434] vma_interval_tree_remove+0xc75/0xec0 [ 31.788075] vma_prepare+0xc54/0x11a0 [ 31.788583] __split_vma+0x5af/0x950 [ 31.789115] ? __pfx___split_vma+0x10/0x10 [ 31.789680] ? find_held_lock+0x2c/0x110 [ 31.790235] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.790839] ? lock_is_held_type+0x9f/0x120 [ 31.791420] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.792079] ? mtree_range_walk+0x632/0x900 [ 31.792676] ? mas_walk+0x5c7/0x7c0 [ 31.793190] do_vmi_munmap+0x1f1/0x2b0 [ 31.793717] mmap_region+0x1f9/0x2660 [ 31.794230] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.794773] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.795519] ? __pfx_lock_acquire+0x10/0x10 [ 31.796099] ? __pfx_mmap_region+0x10/0x10 [ 31.796667] ? security_mmap_addr+0x7d/0xa0 [ 31.797237] ? get_unmapped_area+0x1f5/0x3f0 [ 31.797833] do_mmap+0x854/0xf00 [ 31.798301] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.798826] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.799421] ksys_mmap_pgoff+0x3af/0x500 [ 31.799967] do_syscall_64+0x3f/0x90 [ 31.800483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.801207] RIP: 0033:0x7f1d6fa59d82 [ 31.801696] 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 [ 31.803971] RSP: 002b:00007fffa3369888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.804944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d6fa59d82 [ 31.805845] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d6ee93000 [ 31.806733] RBP: 00007f1d6ee93000 R08: 0000000000000009 R09: 0000000000001000 [ 31.807638] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd8800eec0 [ 31.808543] R13: 00007fffa33698a0 R14: 00007fffa33698d0 R15: 00007fffa3369c30 [ 31.809484] [ 31.809801] [ 31.810027] Allocated by task 214: [ 31.810486] kasan_save_stack+0x22/0x50 [ 31.811029] kasan_set_track+0x25/0x30 [ 31.811546] __kasan_slab_alloc+0x59/0x70 [ 31.812155] kmem_cache_alloc+0x16b/0x370 [ 31.812697] vm_area_dup+0x20/0x160 [ 31.813212] __split_vma+0x170/0x950 [ 31.813704] split_vma+0xc6/0x110 [ 31.814173] mprotect_fixup+0x8d2/0xb30 [ 31.814711] do_mprotect_pkey+0x87e/0xd40 [ 31.815264] __x64_sys_mprotect+0x78/0xc0 [ 31.815827] do_syscall_64+0x3f/0x90 [ 31.816328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.817030] [ 31.817257] Freed by task 214: [ 31.817670] kasan_save_stack+0x22/0x50 [ 31.818196] kasan_set_track+0x25/0x30 [ 31.818728] kasan_save_free_info+0x2b/0x50 [ 31.819270] __kasan_slab_free+0x10a/0x190 [ 31.819808] kmem_cache_free+0x10d/0x4d0 [ 31.820320] rcu_core+0x8c8/0x2860 [ 31.820767] __do_softirq+0x1b7/0x7d4 [ 31.821260] [ 31.821476] Last potentially related work creation: [ 31.822066] kasan_save_stack+0x22/0x50 [ 31.822566] __kasan_record_aux_stack+0x8e/0xa0 [ 31.823143] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.823814] remove_vma+0x139/0x170 [ 31.824267] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.824827] do_vmi_munmap+0x1f1/0x2b0 [ 31.825319] __vm_munmap+0x138/0x3a0 [ 31.825792] __x64_sys_munmap+0x59/0x80 [ 31.826291] do_syscall_64+0x3f/0x90 [ 31.826773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.827421] [ 31.827638] The buggy address belongs to the object at ffff88800ee8c3a0 [ 31.827638] which belongs to the cache vm_area_struct of size 168 [ 31.829144] The buggy address is located 88 bytes inside of [ 31.829144] freed 168-byte region [ffff88800ee8c3a0, ffff88800ee8c448) [ 31.830544] [ 31.830760] The buggy address belongs to the physical page: [ 31.831412] page:00000000c8cd1eff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee8c [ 31.832501] memcg:ffff88801412ce01 [ 31.832938] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.833583] page_type: 0xffffffff() [ 31.834032] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.834944] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801412ce01 [ 31.835865] page dumped because: kasan: bad access detected [ 31.836524] [ 31.836747] Memory state around the buggy address: [ 31.837473] ffff88800ee8c280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.838354] ffff88800ee8c300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.839200] >ffff88800ee8c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.840050] ^ [ 31.840884] ffff88800ee8c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.841747] ffff88800ee8c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.842598] ================================================================== [ 31.843523] Disabling lock debugging due to kernel taint [ 34.386609] BUG: Bad rss-counter state mm:0000000088c67a42 type:MM_FILEPAGES val:33 [ 34.387795] BUG: Bad rss-counter state mm:0000000088c67a42 type:MM_ANONPAGES val:22 [ 34.857296] BUG: Bad rss-counter state mm:000000005f4841b4 type:MM_FILEPAGES val:33 [ 34.858460] BUG: Bad rss-counter state mm:000000005f4841b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53243' (ECDSA) to the list of known hosts. 2023/06/21 01:57:06 fuzzer started 2023/06/21 01:57:07 dialing manager at localhost:36067 2023/06/21 01:57:07 checking machine... 2023/06/21 01:57:07 checking revisions... [ 35.460506] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:57:07 testing simple program... [ 35.502946] cgroup: Unknown subsys name 'net' [ 35.556882] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:57:06 Registers: info registers vcpu 0 RAX=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff888008d9f9d0 RDX=1ffff110011b3f31 RSI=ffffffff813ad720 RDI=ffff888008d9f9f8 RBP=ffff888008d9f9c8 RSP=ffff888008d9f928 R8 =0000000000000001 R9 =ffff888008d9f970 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008d9f9f8 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800dbf4100 RIP=ffffffff813ad474 RFL=00000282 [--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 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=00007f9d86e68650 CR3=000000000fd82000 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=0000000000000001 RBX=0000000000000001 RCX=ffffffff812888a0 RDX=1ffff1100d9e5022 RSI=0000000000000008 RDI=0000000000000000 RBP=dffffc0000000000 RSP=ffff888008e07e78 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451223a RFL=00000046 [---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=00007fccb02df2a0 CR3=000000000d790000 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=7fdc8209b61ec58533433bde797e4cc5 XMM02=2c67c8bc2e329bc3000000000011acf8 XMM03=fb795ef6d65770560000000000121a20 XMM04=7456883dca1c091500000000000ae988 XMM05=e4cb8bb95a7664b60000000000131808 XMM06=76b21afa49c9b3440000000000130670 XMM07=e042d86d42eb936e0000000000121ca0 XMM08=efe17c5310ac4375000000000011ad58 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000