syzkaller login: [ 31.054902] BUG: Bad rss-counter state mm:000000001cda2c5c type:MM_FILEPAGES val:33 [ 31.055911] BUG: Bad rss-counter state mm:000000001cda2c5c type:MM_ANONPAGES val:22 [ 31.216627] ================================================================== [ 31.217708] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.218821] Read of size 8 at addr ffff888019669d08 by task sshd/221 [ 31.219882] [ 31.220141] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.221159] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.222311] Call Trace: [ 31.222714] [ 31.223019] dump_stack_lvl+0x91/0xf0 [ 31.223509] print_report+0xcc/0x620 [ 31.223996] ? __virt_addr_valid+0x102/0x340 [ 31.224549] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.225169] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.225795] kasan_report+0xbe/0xf0 [ 31.226266] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.226903] vma_interval_tree_remove+0xc75/0xec0 [ 31.227499] vma_prepare+0xc54/0x11a0 [ 31.227977] __split_vma+0x5af/0x950 [ 31.228456] ? __pfx___split_vma+0x10/0x10 [ 31.228989] ? find_held_lock+0x2c/0x110 [ 31.229508] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.230070] ? lock_is_held_type+0x9f/0x120 [ 31.230609] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.231246] ? mtree_range_walk+0x632/0x900 [ 31.231799] ? mas_walk+0x5c7/0x7c0 [ 31.232281] do_vmi_munmap+0x1f1/0x2b0 [ 31.232775] mmap_region+0x1f9/0x2660 [ 31.233254] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.233759] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.234474] ? __pfx_lock_acquire+0x10/0x10 [ 31.235023] ? __pfx_mmap_region+0x10/0x10 [ 31.235554] ? security_mmap_addr+0x7d/0xa0 [ 31.236087] ? get_unmapped_area+0x1f5/0x3f0 [ 31.236635] do_mmap+0x854/0xf00 [ 31.237075] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.237568] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.238134] ksys_mmap_pgoff+0x3af/0x500 [ 31.238650] do_syscall_64+0x3f/0x90 [ 31.239136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.239784] RIP: 0033:0x7f90efbcad82 [ 31.240242] 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 [ 31.242389] RSP: 002b:00007ffd4dc6bd18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.243318] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90efbcad82 [ 31.244176] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90ef004000 [ 31.245024] RBP: 00007f90ef004000 R08: 0000000000000009 R09: 0000000000001000 [ 31.245873] R10: 0000000000000812 R11: 0000000000000206 R12: 000055823fd20980 [ 31.246731] R13: 00007ffd4dc6bd30 R14: 00007ffd4dc6bd60 R15: 00007ffd4dc6c0c0 [ 31.247593] [ 31.247883] [ 31.248099] Allocated by task 214: [ 31.248530] kasan_save_stack+0x22/0x50 [ 31.249035] kasan_set_track+0x25/0x30 [ 31.249531] __kasan_slab_alloc+0x59/0x70 [ 31.250060] kmem_cache_alloc+0x16b/0x370 [ 31.250577] vm_area_dup+0x20/0x160 [ 31.251042] __split_vma+0x170/0x950 [ 31.251509] split_vma+0xc6/0x110 [ 31.251952] mprotect_fixup+0x8d2/0xb30 [ 31.252458] do_mprotect_pkey+0x87e/0xd40 [ 31.252979] __x64_sys_mprotect+0x78/0xc0 [ 31.253501] do_syscall_64+0x3f/0x90 [ 31.253976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.254618] [ 31.254853] Freed by task 214: [ 31.255251] kasan_save_stack+0x22/0x50 [ 31.255754] kasan_set_track+0x25/0x30 [ 31.256250] kasan_save_free_info+0x2b/0x50 [ 31.256792] __kasan_slab_free+0x10a/0x190 [ 31.257330] kmem_cache_free+0x10d/0x4d0 [ 31.257833] rcu_core+0x8c8/0x2860 [ 31.258290] __do_softirq+0x1b7/0x7d4 [ 31.258766] [ 31.258985] Last potentially related work creation: [ 31.259571] kasan_save_stack+0x22/0x50 [ 31.260078] __kasan_record_aux_stack+0x8e/0xa0 [ 31.260746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.261388] remove_vma+0x139/0x170 [ 31.261836] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.262394] do_vmi_munmap+0x1f1/0x2b0 [ 31.262900] __vm_munmap+0x138/0x3a0 [ 31.263369] __x64_sys_munmap+0x59/0x80 [ 31.263871] do_syscall_64+0x3f/0x90 [ 31.264345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.264985] [ 31.265200] The buggy address belongs to the object at ffff888019669cb0 [ 31.265200] which belongs to the cache vm_area_struct of size 168 [ 31.266677] The buggy address is located 88 bytes inside of [ 31.266677] freed 168-byte region [ffff888019669cb0, ffff888019669d58) [ 31.268108] [ 31.268323] The buggy address belongs to the physical page: [ 31.268982] page:000000008640a10f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19669 [ 31.270080] memcg:ffff88800ee1e801 [ 31.270504] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.271164] page_type: 0xffffffff() [ 31.271619] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.272536] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee1e801 [ 31.273437] page dumped because: kasan: bad access detected [ 31.274101] [ 31.274319] Memory state around the buggy address: [ 31.274917] ffff888019669c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.275768] ffff888019669c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.276620] >ffff888019669d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.277467] ^ [ 31.277906] ffff888019669d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.278761] ffff888019669e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.279615] ================================================================== [ 31.280545] Disabling lock debugging due to kernel taint [ 33.324431] BUG: Bad rss-counter state mm:0000000061c2ab9b type:MM_FILEPAGES val:33 [ 33.325430] BUG: Bad rss-counter state mm:0000000061c2ab9b type:MM_ANONPAGES val:22 [ 33.829813] BUG: Bad rss-counter state mm:000000001f52b87b type:MM_FILEPAGES val:33 [ 33.830839] BUG: Bad rss-counter state mm:000000001f52b87b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56111' (ECDSA) to the list of known hosts. 2023/06/21 01:28:07 fuzzer started 2023/06/21 01:28:07 dialing manager at localhost:36067 2023/06/21 01:28:07 checking machine... 2023/06/21 01:28:07 checking revisions... [ 34.604710] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:28:07 testing simple program... [ 34.652559] cgroup: Unknown subsys name 'net' [ 34.704269] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:28:07 Registers: info registers vcpu 0 RAX=1ffffd40000da900 RBX=ffffea00006d4800 RCX=ffffffff81badbc8 RDX=fffff940000da901 RSI=0000000000000008 RDI=ffffea00006d4800 RBP=0000000000000000 RSP=ffff88800f47faf8 R8 =0000000000000000 R9 =fffff940000da900 R10=ffffea00006d4807 R11=0000000000000128 R12=ffffea00006d4800 R13=ffff88801bceb488 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff81badbd4 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 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=00007f6c38882000 CR3=000000000fca2000 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=000000000000009300000000000ad860 XMM02=000b0002000051450000000000000096 XMM03=00000000000c58e0000b000200005150 XMM04=00000000000000000000000000123650 XMM05=00000000000b5390000b000200005196 XMM06=000b0002000051850000000000000024 XMM07=0000000000000000000000000011073c XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85652c08 RCX=0000000000000000 RDX=ffff888015848000 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880147ef450 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=1ffff110028fdf1d RIP=ffffffff814c8562 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 00007f990c4bd900 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=00007f990b8f3930 CR3=0000000008c74000 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=60f3023eff35758b1249f5f729466dca XMM02=eff9b2d0a8fce9cb000000000011b618 XMM03=2c67c8bc2e329bc3000000000011b740 XMM04=76dc2e742c3a1f4300000000000ae988 XMM05=1983a38d1add4cc10000000000132cb0 XMM06=c291bd5c70af25b90000000000131d50 XMM07=fb795ef6d65770560000000000122008 XMM08=2c67c8bc2e329bc3000000000011b740 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000