syzkaller login: [ 30.728207] BUG: Bad rss-counter state mm:00000000cd24814b type:MM_FILEPAGES val:33 [ 30.729419] BUG: Bad rss-counter state mm:00000000cd24814b type:MM_ANONPAGES val:22 [ 30.774791] ================================================================== [ 30.775765] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.776891] Read of size 8 at addr ffff888016cadb38 by task sshd/220 [ 30.777707] [ 30.777943] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.778879] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.779922] Call Trace: [ 30.780267] [ 30.780572] dump_stack_lvl+0x91/0xf0 [ 30.781106] print_report+0xcc/0x620 [ 30.781630] ? __virt_addr_valid+0x102/0x340 [ 30.782222] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782881] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.783541] kasan_report+0xbe/0xf0 [ 30.784049] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784717] vma_interval_tree_remove+0xc75/0xec0 [ 30.785386] vma_prepare+0xc54/0x11a0 [ 30.785909] __split_vma+0x5af/0x950 [ 30.786422] ? __pfx___split_vma+0x10/0x10 [ 30.786989] ? find_held_lock+0x2c/0x110 [ 30.787549] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.788157] ? lock_is_held_type+0x9f/0x120 [ 30.788741] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.789404] ? mtree_range_walk+0x632/0x900 [ 30.789998] ? mas_walk+0x5c7/0x7c0 [ 30.790512] do_vmi_munmap+0x1f1/0x2b0 [ 30.791044] mmap_region+0x1f9/0x2660 [ 30.791569] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.792123] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.792916] ? __pfx_lock_acquire+0x10/0x10 [ 30.793492] ? __pfx_mmap_region+0x10/0x10 [ 30.794065] ? security_mmap_addr+0x7d/0xa0 [ 30.794639] ? get_unmapped_area+0x1f5/0x3f0 [ 30.795235] do_mmap+0x854/0xf00 [ 30.795707] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.796241] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.796861] ksys_mmap_pgoff+0x3af/0x500 [ 30.797412] do_syscall_64+0x3f/0x90 [ 30.797926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.798615] RIP: 0033:0x7fee9fa81d82 [ 30.799100] 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 [ 30.801395] RSP: 002b:00007ffd2183ed68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.802356] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee9fa81d82 [ 30.803260] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee9eebb000 [ 30.804159] RBP: 00007fee9eebb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.805074] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563378800ec0 [ 30.805979] R13: 00007ffd2183ed80 R14: 00007ffd2183edb0 R15: 00007ffd2183f110 [ 30.806891] [ 30.807205] [ 30.807437] Allocated by task 213: [ 30.807893] kasan_save_stack+0x22/0x50 [ 30.808435] kasan_set_track+0x25/0x30 [ 30.808967] __kasan_slab_alloc+0x59/0x70 [ 30.809530] kmem_cache_alloc+0x16b/0x370 [ 30.810082] vm_area_dup+0x20/0x160 [ 30.810565] __split_vma+0x170/0x950 [ 30.811060] split_vma+0xc6/0x110 [ 30.811527] mprotect_fixup+0x8d2/0xb30 [ 30.812053] do_mprotect_pkey+0x87e/0xd40 [ 30.812602] __x64_sys_mprotect+0x78/0xc0 [ 30.813162] do_syscall_64+0x3f/0x90 [ 30.813669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.814353] [ 30.814580] Freed by task 213: [ 30.814993] kasan_save_stack+0x22/0x50 [ 30.815528] kasan_set_track+0x25/0x30 [ 30.816051] kasan_save_free_info+0x2b/0x50 [ 30.816608] __kasan_slab_free+0x10a/0x190 [ 30.817189] kmem_cache_free+0x10d/0x4d0 [ 30.817729] rcu_core+0x8c8/0x2860 [ 30.818197] __do_softirq+0x1b7/0x7d4 [ 30.818705] [ 30.818935] Last potentially related work creation: [ 30.819560] kasan_save_stack+0x22/0x50 [ 30.820092] __kasan_record_aux_stack+0x8e/0xa0 [ 30.820696] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.821392] remove_vma+0x139/0x170 [ 30.821870] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.822457] do_vmi_munmap+0x1f1/0x2b0 [ 30.822965] __vm_munmap+0x138/0x3a0 [ 30.823456] __x64_sys_munmap+0x59/0x80 [ 30.823977] do_syscall_64+0x3f/0x90 [ 30.824481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.825175] [ 30.825399] The buggy address belongs to the object at ffff888016cadae0 [ 30.825399] which belongs to the cache vm_area_struct of size 168 [ 30.826927] The buggy address is located 88 bytes inside of [ 30.826927] freed 168-byte region [ffff888016cadae0, ffff888016cadb88) [ 30.828408] [ 30.828635] The buggy address belongs to the physical page: [ 30.829325] page:00000000c2452f1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cad [ 30.830463] memcg:ffff88800d2be001 [ 30.830904] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.831577] page_type: 0xffffffff() [ 30.832040] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.832991] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2be001 [ 30.833930] page dumped because: kasan: bad access detected [ 30.834632] [ 30.834858] Memory state around the buggy address: [ 30.835466] ffff888016cada00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.836348] ffff888016cada80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.837246] >ffff888016cadb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.838125] ^ [ 30.838749] ffff888016cadb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.839619] ffff888016cadc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.840488] ================================================================== [ 30.841977] Disabling lock debugging due to kernel taint [ 32.856977] BUG: Bad rss-counter state mm:00000000c8f2817b type:MM_FILEPAGES val:33 [ 32.858238] BUG: Bad rss-counter state mm:00000000c8f2817b type:MM_ANONPAGES val:22 [ 33.238943] BUG: Bad rss-counter state mm:00000000694aca87 type:MM_FILEPAGES val:33 [ 33.240173] BUG: Bad rss-counter state mm:00000000694aca87 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18788' (ECDSA) to the list of known hosts. 2023/06/20 14:54:05 fuzzer started 2023/06/20 14:54:05 dialing manager at localhost:36067 2023/06/20 14:54:05 checking machine... 2023/06/20 14:54:05 checking revisions... [ 33.861267] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:54:05 testing simple program... [ 33.905028] cgroup: Unknown subsys name 'net' [ 33.945210] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:54:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff83640612 RCX=0000000000000001 RDX=1ffff110028f7ea3 RSI=ffff8880147bfc80 RDI=ffffffff83640612 RBP=ffffffff83640612 RSP=ffff8880147bf468 R8 =0000000000000001 R9 =ffff8880147bf500 R10=0000000000038001 R11=000000000008a84f R12=ffff8880147bf588 R13=0000000000000000 R14=ffff8880147c0000 R15=1ffff110028f7f1d RIP=ffffffff811fc6f7 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 00007f167dda4900 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=00007f167d19b670 CR3=0000000013b00000 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=59a860dd19746f87b74a039982f64f59 XMM02=000000000011be30d59e07bde36eea69 XMM03=000000000011bf58ec2efd57dc4c00df XMM04=0a127a041da25e0300000000000ae988 XMM05=1f4f1b2590190b570000000000133b30 XMM06=4fda316b135da52b0000000000132920 XMM07=fb795ef6d65770560000000000122c60 XMM08=2c67c8bc2e329bc3000000000011bf58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000055e80236c890 RCX=0000000000000000 RDX=00000000ffffffff RSI=0000000000000004 RDI=000055e80237f990 RBP=0000000000000000 RSP=00007fff660bc840 R8 =0000000000000004 R9 =0000000000000006 R10=00007f13aeaeae10 R11=0000000000000006 R12=0000000000000002 R13=000055e80237f990 R14=0000000000000000 R15=0000000000000000 RIP=00007f13af0bddfb RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f13ae598900 00000000 00000000 GS =0000 0000000000000000 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=00007fff660b6000 CR3=00000000094ae000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000