syzkaller login: [ 31.605463] BUG: Bad rss-counter state mm:0000000002c265a7 type:MM_FILEPAGES val:33 [ 31.607331] BUG: Bad rss-counter state mm:0000000002c265a7 type:MM_ANONPAGES val:22 [ 31.777484] ================================================================== [ 31.778558] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.779671] Read of size 8 at addr ffff88800c58d058 by task sshd/219 [ 31.780650] [ 31.780866] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.781734] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.782723] Call Trace: [ 31.783042] [ 31.783326] dump_stack_lvl+0x91/0xf0 [ 31.783816] print_report+0xcc/0x620 [ 31.784302] ? __virt_addr_valid+0x102/0x340 [ 31.784850] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.785477] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.786095] kasan_report+0xbe/0xf0 [ 31.786572] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.787191] vma_interval_tree_remove+0xc75/0xec0 [ 31.787793] vma_prepare+0xc54/0x11a0 [ 31.788272] __split_vma+0x5af/0x950 [ 31.788745] ? __pfx___split_vma+0x10/0x10 [ 31.789297] ? find_held_lock+0x2c/0x110 [ 31.789821] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.790385] ? lock_is_held_type+0x9f/0x120 [ 31.790927] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.791535] ? mtree_range_walk+0x632/0x900 [ 31.792082] ? mas_walk+0x5c7/0x7c0 [ 31.792561] do_vmi_munmap+0x1f1/0x2b0 [ 31.793060] mmap_region+0x1f9/0x2660 [ 31.793551] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.794059] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.794777] ? __pfx_lock_acquire+0x10/0x10 [ 31.795325] ? __pfx_mmap_region+0x10/0x10 [ 31.795861] ? security_mmap_addr+0x7d/0xa0 [ 31.796392] ? get_unmapped_area+0x1f5/0x3f0 [ 31.796937] do_mmap+0x854/0xf00 [ 31.797392] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.797899] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.798471] ksys_mmap_pgoff+0x3af/0x500 [ 31.798982] do_syscall_64+0x3f/0x90 [ 31.799467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.800127] RIP: 0033:0x7f27cd3c3d82 [ 31.800593] 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 [ 31.802779] RSP: 002b:00007ffc86349ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.803710] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f27cd3c3d82 [ 31.804557] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f27cc7fd000 [ 31.805413] RBP: 00007f27cc7fd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.806261] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558cef7b6ec0 [ 31.807105] R13: 00007ffc86349d00 R14: 00007ffc86349d30 R15: 00007ffc8634a090 [ 31.807961] [ 31.808253] [ 31.808469] Allocated by task 212: [ 31.808901] kasan_save_stack+0x22/0x50 [ 31.809427] kasan_set_track+0x25/0x30 [ 31.809919] __kasan_slab_alloc+0x59/0x70 [ 31.810444] kmem_cache_alloc+0x16b/0x370 [ 31.810957] vm_area_dup+0x20/0x160 [ 31.811410] __split_vma+0x170/0x950 [ 31.811873] split_vma+0xc6/0x110 [ 31.812321] mprotect_fixup+0x8d2/0xb30 [ 31.812826] do_mprotect_pkey+0x87e/0xd40 [ 31.813351] __x64_sys_mprotect+0x78/0xc0 [ 31.813874] do_syscall_64+0x3f/0x90 [ 31.814356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.815006] [ 31.815220] Freed by task 212: [ 31.815613] kasan_save_stack+0x22/0x50 [ 31.816127] kasan_set_track+0x25/0x30 [ 31.816624] kasan_save_free_info+0x2b/0x50 [ 31.817181] __kasan_slab_free+0x10a/0x190 [ 31.817729] kmem_cache_free+0x10d/0x4d0 [ 31.818249] rcu_core+0x8c8/0x2860 [ 31.818701] __do_softirq+0x1b7/0x7d4 [ 31.819185] [ 31.819401] Last potentially related work creation: [ 31.819989] kasan_save_stack+0x22/0x50 [ 31.820498] __kasan_record_aux_stack+0x8e/0xa0 [ 31.821084] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.821730] remove_vma+0x139/0x170 [ 31.822188] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.822750] do_vmi_munmap+0x1f1/0x2b0 [ 31.823245] __vm_munmap+0x138/0x3a0 [ 31.823708] __x64_sys_munmap+0x59/0x80 [ 31.824211] do_syscall_64+0x3f/0x90 [ 31.824691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.825357] [ 31.825575] The buggy address belongs to the object at ffff88800c58d000 [ 31.825575] which belongs to the cache vm_area_struct of size 168 [ 31.827057] The buggy address is located 88 bytes inside of [ 31.827057] freed 168-byte region [ffff88800c58d000, ffff88800c58d0a8) [ 31.828483] [ 31.828698] The buggy address belongs to the physical page: [ 31.829379] page:000000004f229410 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc58d [ 31.830474] memcg:ffff88800f0a7201 [ 31.830905] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.831603] page_type: 0xffffffff() [ 31.832070] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a8f00 dead000000000005 [ 31.832997] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0a7201 [ 31.833929] page dumped because: kasan: bad access detected [ 31.834597] [ 31.834822] Memory state around the buggy address: [ 31.835412] ffff88800c58cf00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.836291] ffff88800c58cf80: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.837155] >ffff88800c58d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.837996] ^ [ 31.838715] ffff88800c58d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.839559] ffff88800c58d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.840404] ================================================================== [ 31.841387] Disabling lock debugging due to kernel taint [ 33.788034] BUG: Bad rss-counter state mm:000000006cf092e1 type:MM_FILEPAGES val:33 [ 33.789200] BUG: Bad rss-counter state mm:000000006cf092e1 type:MM_ANONPAGES val:22 [ 34.176354] BUG: Bad rss-counter state mm:000000006d4af3c8 type:MM_FILEPAGES val:33 [ 34.177416] BUG: Bad rss-counter state mm:000000006d4af3c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43349' (ECDSA) to the list of known hosts. 2023/06/20 11:22:34 fuzzer started 2023/06/20 11:22:34 dialing manager at localhost:36067 2023/06/20 11:22:34 checking machine... 2023/06/20 11:22:34 checking revisions... [ 34.926778] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:22:34 testing simple program... [ 34.980705] cgroup: Unknown subsys name 'net' [ 35.037735] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:22:34 Registers: info registers vcpu 0 RAX=0000000000000009 RBX=0000000000000001 RCX=ffffffff8185a07b RDX=0000000000000009 RSI=ffffffff8614148a RDI=ffffffff85e03970 RBP=ffff88806ce09af0 RSP=ffff88806ce099f0 R8 =ffffffff8614148a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000223eb R12=ffffffff85e03990 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc21 RFL=00000216 [----AP-] 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 00007ff5c366b900 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=00007ff5c3c230b0 CR3=000000001c964000 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=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff8880145cf278 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff88800fe3d5f0 RIP=ffffffff8180f0a8 RFL=00000283 [--S---C] 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 00007fa2566b7900 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=00007fa255b34830 CR3=000000000c758000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1278a5cecf6a409200000000000ae988 XMM05=c9073297be6c603a0000000000132710 XMM06=dfcdbad4f1609c3700000000001315a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000