syzkaller login: [ 78.095704] BUG: Bad rss-counter state mm:000000006e30bf23 type:MM_FILEPAGES val:33 [ 78.096990] BUG: Bad rss-counter state mm:000000006e30bf23 type:MM_ANONPAGES val:22 [ 78.136214] ================================================================== [ 78.137176] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 78.138203] Read of size 8 at addr ffff88800eb5d310 by task sshd/222 [ 78.138977] [ 78.139201] CPU: 0 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 78.140259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 78.141272] Call Trace: [ 78.141604] [ 78.141893] dump_stack_lvl+0x91/0xf0 [ 78.142394] print_report+0xcc/0x620 [ 78.142873] ? __virt_addr_valid+0x102/0x340 [ 78.143443] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.144078] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.144720] kasan_report+0xbe/0xf0 [ 78.145202] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.145834] vma_interval_tree_remove+0xc75/0xec0 [ 78.146449] vma_prepare+0xc54/0x11a0 [ 78.146928] __split_vma+0x5af/0x950 [ 78.147411] ? __pfx___split_vma+0x10/0x10 [ 78.147943] ? find_held_lock+0x2c/0x110 [ 78.148487] do_vmi_align_munmap+0x2ba/0x11f0 [ 78.149062] ? lock_is_held_type+0x9f/0x120 [ 78.149601] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 78.150216] ? mtree_range_walk+0x632/0x900 [ 78.150775] ? mas_walk+0x5c7/0x7c0 [ 78.151251] do_vmi_munmap+0x1f1/0x2b0 [ 78.151754] mmap_region+0x1f9/0x2660 [ 78.152235] ? vm_mmap_pgoff+0x15c/0x3a0 [ 78.152761] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 78.153486] ? __pfx_lock_acquire+0x10/0x10 [ 78.154017] ? __pfx_mmap_region+0x10/0x10 [ 78.154553] ? security_mmap_addr+0x7d/0xa0 [ 78.155083] ? get_unmapped_area+0x1f5/0x3f0 [ 78.155632] do_mmap+0x854/0xf00 [ 78.156070] vm_mmap_pgoff+0x1a6/0x3a0 [ 78.156574] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 78.157144] ksys_mmap_pgoff+0x3af/0x500 [ 78.157655] do_syscall_64+0x3f/0x90 [ 78.158143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.158790] RIP: 0033:0x7fa7ebd61d82 [ 78.159246] 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 [ 78.161403] RSP: 002b:00007ffc06d4c7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 78.162312] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa7ebd61d82 [ 78.163163] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa7eb19b000 [ 78.164012] RBP: 00007fa7eb19b000 R08: 0000000000000009 R09: 0000000000001000 [ 78.164880] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560655eafec0 [ 78.165740] R13: 00007ffc06d4c7f0 R14: 00007ffc06d4c820 R15: 00007ffc06d4cb80 [ 78.166598] [ 78.166897] [ 78.167110] Allocated by task 214: [ 78.167548] kasan_save_stack+0x22/0x50 [ 78.168059] kasan_set_track+0x25/0x30 [ 78.168560] __kasan_slab_alloc+0x59/0x70 [ 78.169097] kmem_cache_alloc+0x16b/0x370 [ 78.169620] vm_area_dup+0x20/0x160 [ 78.170071] __split_vma+0x170/0x950 [ 78.170538] split_vma+0xc6/0x110 [ 78.170980] mprotect_fixup+0x8d2/0xb30 [ 78.171487] do_mprotect_pkey+0x87e/0xd40 [ 78.172022] __x64_sys_mprotect+0x78/0xc0 [ 78.172556] do_syscall_64+0x3f/0x90 [ 78.173039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.173674] [ 78.173888] Freed by task 214: [ 78.174277] kasan_save_stack+0x22/0x50 [ 78.174783] kasan_set_track+0x25/0x30 [ 78.175289] kasan_save_free_info+0x2b/0x50 [ 78.175825] __kasan_slab_free+0x10a/0x190 [ 78.176357] kmem_cache_free+0x10d/0x4d0 [ 78.176877] rcu_core+0x8c8/0x2860 [ 78.177323] __do_softirq+0x1b7/0x7d4 [ 78.177807] [ 78.178030] Last potentially related work creation: [ 78.178620] kasan_save_stack+0x22/0x50 [ 78.179136] __kasan_record_aux_stack+0x8e/0xa0 [ 78.179712] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.180353] remove_vma+0x139/0x170 [ 78.180813] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.181383] do_vmi_munmap+0x1f1/0x2b0 [ 78.181866] __vm_munmap+0x138/0x3a0 [ 78.182336] __x64_sys_munmap+0x59/0x80 [ 78.182832] do_syscall_64+0x3f/0x90 [ 78.183322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.183964] [ 78.184184] The buggy address belongs to the object at ffff88800eb5d2b8 [ 78.184184] which belongs to the cache vm_area_struct of size 168 [ 78.185672] The buggy address is located 88 bytes inside of [ 78.185672] freed 168-byte region [ffff88800eb5d2b8, ffff88800eb5d360) [ 78.187097] [ 78.187316] The buggy address belongs to the physical page: [ 78.187995] page:00000000772be55f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb5d [ 78.189114] memcg:ffff88800ec99401 [ 78.189558] flags: 0x100000000000200(slab|node=0|zone=1) [ 78.190232] page_type: 0xffffffff() [ 78.190698] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 78.191628] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec99401 [ 78.192558] page dumped because: kasan: bad access detected [ 78.193239] [ 78.193457] Memory state around the buggy address: [ 78.194042] ffff88800eb5d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 78.194904] ffff88800eb5d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 78.195777] >ffff88800eb5d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 78.196649] ^ [ 78.197115] ffff88800eb5d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 78.197969] ffff88800eb5d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 78.198823] ================================================================== [ 78.199906] Disabling lock debugging due to kernel taint [ 80.161588] BUG: Bad rss-counter state mm:00000000322d1b4c type:MM_FILEPAGES val:33 [ 80.162679] BUG: Bad rss-counter state mm:00000000322d1b4c type:MM_ANONPAGES val:22 [ 80.668108] BUG: Bad rss-counter state mm:000000005b2ce966 type:MM_FILEPAGES val:33 [ 80.669130] BUG: Bad rss-counter state mm:000000005b2ce966 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22113' (ECDSA) to the list of known hosts. 2023/06/20 07:57:51 fuzzer started 2023/06/20 07:57:51 dialing manager at localhost:44161 2023/06/20 07:57:51 checking machine... 2023/06/20 07:57:51 checking revisions... [ 81.400117] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:57:52 testing simple program... [ 81.449605] cgroup: Unknown subsys name 'net' [ 81.485597] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:57:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffe74a0e338 CR3=000000000e664000 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=2031353a37353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a37353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016b6d1c0 RSI=ffffffff81f595b9 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880175d7a70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff8880098440d8 R13=0000000000000000 R14=ffff88800916f808 R15=dffffc0000000000 RIP=ffffffff81374460 RFL=00000293 [--S-A-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 00007f9a264f0900 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=00007ffd620f0000 CR3=000000000e97c000 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