syzkaller login: [ 30.968634] BUG: Bad rss-counter state mm:00000000bf37b7b5 type:MM_FILEPAGES val:33 [ 30.969751] BUG: Bad rss-counter state mm:00000000bf37b7b5 type:MM_ANONPAGES val:22 [ 31.115266] ================================================================== [ 31.116165] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.117115] Read of size 8 at addr ffff8880099cbc20 by task sshd/219 [ 31.117884] [ 31.118101] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.119150] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.120151] Call Trace: [ 31.120501] <TASK> [ 31.120812] dump_stack_lvl+0x91/0xf0 [ 31.121310] print_report+0xcc/0x620 [ 31.121808] ? __virt_addr_valid+0x102/0x340 [ 31.122371] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.123002] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.123626] kasan_report+0xbe/0xf0 [ 31.124108] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.124747] vma_interval_tree_remove+0xc75/0xec0 [ 31.125355] vma_prepare+0xc54/0x11a0 [ 31.125842] __split_vma+0x5af/0x950 [ 31.126319] ? __pfx___split_vma+0x10/0x10 [ 31.126852] ? find_held_lock+0x2c/0x110 [ 31.127381] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.127953] ? lock_is_held_type+0x9f/0x120 [ 31.128508] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.129121] ? mtree_range_walk+0x632/0x900 [ 31.129681] ? mas_walk+0x5c7/0x7c0 [ 31.130163] do_vmi_munmap+0x1f1/0x2b0 [ 31.130662] mmap_region+0x1f9/0x2660 [ 31.131148] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.131658] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.132376] ? __pfx_lock_acquire+0x10/0x10 [ 31.132932] ? __pfx_mmap_region+0x10/0x10 [ 31.133466] ? security_mmap_addr+0x7d/0xa0 [ 31.134003] ? get_unmapped_area+0x1f5/0x3f0 [ 31.134568] do_mmap+0x854/0xf00 [ 31.135006] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.135504] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.136067] ksys_mmap_pgoff+0x3af/0x500 [ 31.136594] do_syscall_64+0x3f/0x90 [ 31.137077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137730] RIP: 0033:0x7f69f2557d82 [ 31.138216] 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 [ 31.140344] RSP: 002b:00007ffc64175738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.141277] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f69f2557d82 [ 31.142149] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69f1991000 [ 31.143031] RBP: 00007f69f1991000 R08: 0000000000000009 R09: 0000000000001000 [ 31.143910] R10: 0000000000000812 R11: 0000000000000206 R12: 000056009d696ec0 [ 31.144792] R13: 00007ffc64175750 R14: 00007ffc64175780 R15: 00007ffc64175ae0 [ 31.145677] </TASK> [ 31.145972] [ 31.146196] Allocated by task 212: [ 31.146642] kasan_save_stack+0x22/0x50 [ 31.147159] kasan_set_track+0x25/0x30 [ 31.147660] __kasan_slab_alloc+0x59/0x70 [ 31.148186] kmem_cache_alloc+0x16b/0x370 [ 31.148736] vm_area_dup+0x20/0x160 [ 31.149190] __split_vma+0x170/0x950 [ 31.149654] split_vma+0xc6/0x110 [ 31.150098] mprotect_fixup+0x8d2/0xb30 [ 31.150601] do_mprotect_pkey+0x87e/0xd40 [ 31.151119] __x64_sys_mprotect+0x78/0xc0 [ 31.151638] do_syscall_64+0x3f/0x90 [ 31.152121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152790] [ 31.153007] Freed by task 212: [ 31.153397] kasan_save_stack+0x22/0x50 [ 31.153898] kasan_set_track+0x25/0x30 [ 31.154391] kasan_save_free_info+0x2b/0x50 [ 31.154920] __kasan_slab_free+0x10a/0x190 [ 31.155453] kmem_cache_free+0x10d/0x4d0 [ 31.155958] rcu_core+0x8c8/0x2860 [ 31.156411] __do_softirq+0x1b7/0x7d4 [ 31.156894] [ 31.157115] Last potentially related work creation: [ 31.157696] kasan_save_stack+0x22/0x50 [ 31.158196] __kasan_record_aux_stack+0x8e/0xa0 [ 31.158769] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.159416] remove_vma+0x139/0x170 [ 31.159940] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.160525] do_vmi_munmap+0x1f1/0x2b0 [ 31.161018] __vm_munmap+0x138/0x3a0 [ 31.161486] __x64_sys_munmap+0x59/0x80 [ 31.161984] do_syscall_64+0x3f/0x90 [ 31.162463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.163109] [ 31.163329] The buggy address belongs to the object at ffff8880099cbbc8 [ 31.163329] which belongs to the cache vm_area_struct of size 168 [ 31.164793] The buggy address is located 88 bytes inside of [ 31.164793] freed 168-byte region [ffff8880099cbbc8, ffff8880099cbc70) [ 31.166188] [ 31.166404] The buggy address belongs to the physical page: [ 31.167055] page:000000007a80f082 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99cb [ 31.168135] memcg:ffff88800c4add01 [ 31.168569] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.169210] page_type: 0xffffffff() [ 31.169657] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.170571] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4add01 [ 31.171478] page dumped because: kasan: bad access detected [ 31.172135] [ 31.172352] Memory state around the buggy address: [ 31.172956] ffff8880099cbb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.173807] ffff8880099cbb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.174662] >ffff8880099cbc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.175515] ^ [ 31.176040] ffff8880099cbc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.176911] ffff8880099cbd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.177762] ================================================================== [ 31.178701] Disabling lock debugging due to kernel taint [ 33.174276] BUG: Bad rss-counter state mm:00000000596f2a51 type:MM_FILEPAGES val:33 [ 33.175852] BUG: Bad rss-counter state mm:00000000596f2a51 type:MM_ANONPAGES val:22 [ 33.642014] BUG: Bad rss-counter state mm:00000000dd6b2270 type:MM_FILEPAGES val:33 [ 33.643100] BUG: Bad rss-counter state mm:00000000dd6b2270 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46384' (ECDSA) to the list of known hosts. 2023/06/21 00:42:12 fuzzer started 2023/06/21 00:42:12 dialing manager at localhost:36067 2023/06/21 00:42:12 checking machine... 2023/06/21 00:42:12 checking revisions... [ 34.246294] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:42:12 testing simple program... [ 34.287160] cgroup: Unknown subsys name 'net' [ 34.324522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:42:11 Registers: info registers vcpu 0 RAX=ffffffff85d3d350 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11001daaf4f RSP=ffff88800ed57a58 R8 =00000000000d000d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88806ce3de20 R13=ffffffff81806f32 R14=ffff88806ce3de20 R15=ffff88806ce3de00 RIP=ffffffff8180f032 RFL=00000002 [-------] 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 00007fe8d3f6e900 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=00007ffdcbe7c000 CR3=000000001c970000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f4f159059d0 CR3=000000001457c000 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=c9b9fd2d2ed7d7bc7247a21398f2683c XMM02=000000000011b9b0eff9b2d0a8fce9cb XMM03=000000000011ba802c67c8bc2e329bc3 XMM04=aca71dfae8316b8f00000000000ae988 XMM05=dfcdbad4f1609c370000000000132180 XMM06=a45c1931c55f7e6d0000000000130fe8 XMM07=e042d86d42eb936e00000000001225a0 XMM08=19d93538b3907774000000000011ba80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000