syzkaller login: [ 31.173101] BUG: Bad rss-counter state mm:00000000e310b64a type:MM_FILEPAGES val:33 [ 31.174321] BUG: Bad rss-counter state mm:00000000e310b64a type:MM_ANONPAGES val:22 [ 31.213391] ================================================================== [ 31.214364] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.215317] Read of size 8 at addr ffff88800ec71df0 by task sshd/220 [ 31.216094] [ 31.216319] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.217188] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.218197] Call Trace: [ 31.218515] [ 31.218799] dump_stack_lvl+0x91/0xf0 [ 31.219293] print_report+0xcc/0x620 [ 31.219774] ? __virt_addr_valid+0x102/0x340 [ 31.220325] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.220937] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221559] kasan_report+0xbe/0xf0 [ 31.222053] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.222687] vma_interval_tree_remove+0xc75/0xec0 [ 31.223304] vma_prepare+0xc54/0x11a0 [ 31.223786] __split_vma+0x5af/0x950 [ 31.224263] ? __pfx___split_vma+0x10/0x10 [ 31.224796] ? find_held_lock+0x2c/0x110 [ 31.225322] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.225914] ? lock_is_held_type+0x9f/0x120 [ 31.226454] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.227056] ? mtree_range_walk+0x632/0x900 [ 31.227615] ? mas_walk+0x5c7/0x7c0 [ 31.228093] do_vmi_munmap+0x1f1/0x2b0 [ 31.228589] mmap_region+0x1f9/0x2660 [ 31.229068] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.229583] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.230309] ? __pfx_lock_acquire+0x10/0x10 [ 31.230839] ? __pfx_mmap_region+0x10/0x10 [ 31.231372] ? security_mmap_addr+0x7d/0xa0 [ 31.231904] ? get_unmapped_area+0x1f5/0x3f0 [ 31.232448] do_mmap+0x854/0xf00 [ 31.232895] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.233386] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.233967] ksys_mmap_pgoff+0x3af/0x500 [ 31.234481] do_syscall_64+0x3f/0x90 [ 31.234958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.235615] RIP: 0033:0x7faf256d5d82 [ 31.236074] 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 [ 31.238272] RSP: 002b:00007ffecd4a6548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.239180] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf256d5d82 [ 31.240030] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf24b0f000 [ 31.240883] RBP: 00007faf24b0f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.241732] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd92223980 [ 31.242608] R13: 00007ffecd4a6560 R14: 00007ffecd4a6590 R15: 00007ffecd4a68f0 [ 31.243456] [ 31.243754] [ 31.243971] Allocated by task 213: [ 31.244398] kasan_save_stack+0x22/0x50 [ 31.244904] kasan_set_track+0x25/0x30 [ 31.245395] __kasan_slab_alloc+0x59/0x70 [ 31.245936] kmem_cache_alloc+0x16b/0x370 [ 31.246447] vm_area_dup+0x20/0x160 [ 31.246907] __split_vma+0x170/0x950 [ 31.247379] split_vma+0xc6/0x110 [ 31.247819] mprotect_fixup+0x8d2/0xb30 [ 31.248325] do_mprotect_pkey+0x87e/0xd40 [ 31.248857] __x64_sys_mprotect+0x78/0xc0 [ 31.249370] do_syscall_64+0x3f/0x90 [ 31.249863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.250517] [ 31.250736] Freed by task 213: [ 31.251128] kasan_save_stack+0x22/0x50 [ 31.251634] kasan_set_track+0x25/0x30 [ 31.252132] kasan_save_free_info+0x2b/0x50 [ 31.252660] __kasan_slab_free+0x10a/0x190 [ 31.253203] kmem_cache_free+0x10d/0x4d0 [ 31.253708] rcu_core+0x8c8/0x2860 [ 31.254170] __do_softirq+0x1b7/0x7d4 [ 31.254654] [ 31.254870] Last potentially related work creation: [ 31.255449] kasan_save_stack+0x22/0x50 [ 31.255953] __kasan_record_aux_stack+0x8e/0xa0 [ 31.256528] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.257186] remove_vma+0x139/0x170 [ 31.257638] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.258209] do_vmi_munmap+0x1f1/0x2b0 [ 31.258696] __vm_munmap+0x138/0x3a0 [ 31.259168] __x64_sys_munmap+0x59/0x80 [ 31.259667] do_syscall_64+0x3f/0x90 [ 31.260159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.260804] [ 31.261021] The buggy address belongs to the object at ffff88800ec71d98 [ 31.261021] which belongs to the cache vm_area_struct of size 168 [ 31.262503] The buggy address is located 88 bytes inside of [ 31.262503] freed 168-byte region [ffff88800ec71d98, ffff88800ec71e40) [ 31.263897] [ 31.264120] The buggy address belongs to the physical page: [ 31.264778] page:000000004d92d8b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec71 [ 31.265875] memcg:ffff88800e019301 [ 31.266304] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.266953] page_type: 0xffffffff() [ 31.267425] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.268363] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e019301 [ 31.269273] page dumped because: kasan: bad access detected [ 31.269937] [ 31.270150] Memory state around the buggy address: [ 31.270730] ffff88800ec71c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.271588] ffff88800ec71d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.272453] >ffff88800ec71d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.273302] ^ [ 31.274119] ffff88800ec71e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.274979] ffff88800ec71e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.275857] ================================================================== [ 31.276827] Disabling lock debugging due to kernel taint [ 33.031314] BUG: Bad rss-counter state mm:00000000d0c6c3c9 type:MM_FILEPAGES val:33 [ 33.032499] BUG: Bad rss-counter state mm:00000000d0c6c3c9 type:MM_ANONPAGES val:22 [ 33.408004] BUG: Bad rss-counter state mm:00000000422d0801 type:MM_FILEPAGES val:33 [ 33.408995] BUG: Bad rss-counter state mm:00000000422d0801 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64448' (ECDSA) to the list of known hosts. 2023/06/20 18:50:51 fuzzer started 2023/06/20 18:50:51 dialing manager at localhost:36067 2023/06/20 18:50:51 checking machine... 2023/06/20 18:50:51 checking revisions... [ 34.099833] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:50:51 testing simple program... [ 34.151300] cgroup: Unknown subsys name 'net' [ 34.199692] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:50:51 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff88801a099b40 RSI=0000000000000100 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce099f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff888017f2db80 RIP=ffffffff814c086b 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 00007f1deea0f900 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=00007fffe346e000 CR3=000000001a2b8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f3289dd7400 CR3=000000000c7fa000 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=4bea59de562340abae4f2e2503f40659 XMM02=2c67c8bc2e329bc3000000000011da48 XMM03=fb795ef6d657705600000000001221e8 XMM04=6e35b333c9a0b5fa00000000000ae988 XMM05=da482486984bea400000000000132eb8 XMM06=4fda316b135da52b0000000000131f58 XMM07=e042d86d42eb936e0000000000122468 XMM08=e719bf45d51fea72000000000011daa8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000