syzkaller login: [ 31.036937] BUG: Bad rss-counter state mm:000000007d41da54 type:MM_FILEPAGES val:33 [ 31.038145] BUG: Bad rss-counter state mm:000000007d41da54 type:MM_ANONPAGES val:22 [ 31.180288] ================================================================== [ 31.181384] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.182528] Read of size 8 at addr ffff88800d96a880 by task sshd/220 [ 31.183572] [ 31.183871] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.184951] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.186190] Call Trace: [ 31.186587] [ 31.186935] dump_stack_lvl+0x91/0xf0 [ 31.187527] print_report+0xcc/0x620 [ 31.188106] ? __virt_addr_valid+0x102/0x340 [ 31.188784] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.189532] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.190277] kasan_report+0xbe/0xf0 [ 31.190855] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.191613] vma_interval_tree_remove+0xc75/0xec0 [ 31.192339] vma_prepare+0xc54/0x11a0 [ 31.192931] __split_vma+0x5af/0x950 [ 31.193500] ? __pfx___split_vma+0x10/0x10 [ 31.194145] ? find_held_lock+0x2c/0x110 [ 31.194772] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.195466] ? lock_is_held_type+0x9f/0x120 [ 31.196130] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.196887] ? mtree_range_walk+0x632/0x900 [ 31.197561] ? mas_walk+0x5c7/0x7c0 [ 31.198147] do_vmi_munmap+0x1f1/0x2b0 [ 31.198744] mmap_region+0x1f9/0x2660 [ 31.199320] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.199934] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.200781] ? __pfx_lock_acquire+0x10/0x10 [ 31.201325] ? __pfx_mmap_region+0x10/0x10 [ 31.201874] ? security_mmap_addr+0x7d/0xa0 [ 31.202423] ? get_unmapped_area+0x1f5/0x3f0 [ 31.202991] do_mmap+0x854/0xf00 [ 31.203441] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.203954] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.204558] ksys_mmap_pgoff+0x3af/0x500 [ 31.205082] do_syscall_64+0x3f/0x90 [ 31.205576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.206241] RIP: 0033:0x7f1babc4bd82 [ 31.206714] 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 [ 31.208894] RSP: 002b:00007ffde876ef98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.209837] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1babc4bd82 [ 31.210750] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bab085000 [ 31.211732] RBP: 00007f1bab085000 R08: 0000000000000009 R09: 0000000000001000 [ 31.212727] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561f79461d90 [ 31.213714] R13: 00007ffde876efb0 R14: 00007ffde876efe0 R15: 00007ffde876f340 [ 31.214717] [ 31.215055] [ 31.215307] Allocated by task 213: [ 31.215812] kasan_save_stack+0x22/0x50 [ 31.216393] kasan_set_track+0x25/0x30 [ 31.216996] __kasan_slab_alloc+0x59/0x70 [ 31.217618] kmem_cache_alloc+0x16b/0x370 [ 31.218225] vm_area_dup+0x20/0x160 [ 31.218756] __split_vma+0x170/0x950 [ 31.219311] split_vma+0xc6/0x110 [ 31.219823] mprotect_fixup+0x8d2/0xb30 [ 31.220415] do_mprotect_pkey+0x87e/0xd40 [ 31.221029] __x64_sys_mprotect+0x78/0xc0 [ 31.221634] do_syscall_64+0x3f/0x90 [ 31.222176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.222934] [ 31.223179] Freed by task 213: [ 31.223642] kasan_save_stack+0x22/0x50 [ 31.224273] kasan_set_track+0x25/0x30 [ 31.224903] kasan_save_free_info+0x2b/0x50 [ 31.225546] __kasan_slab_free+0x10a/0x190 [ 31.226162] kmem_cache_free+0x10d/0x4d0 [ 31.226753] rcu_core+0x8c8/0x2860 [ 31.227244] __do_softirq+0x1b7/0x7d4 [ 31.227791] [ 31.228033] Last potentially related work creation: [ 31.228689] kasan_save_stack+0x22/0x50 [ 31.229255] __kasan_record_aux_stack+0x8e/0xa0 [ 31.229907] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.230626] remove_vma+0x139/0x170 [ 31.231124] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.231763] do_vmi_munmap+0x1f1/0x2b0 [ 31.232334] __vm_munmap+0x138/0x3a0 [ 31.232896] __x64_sys_munmap+0x59/0x80 [ 31.233489] do_syscall_64+0x3f/0x90 [ 31.234053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234826] [ 31.235078] The buggy address belongs to the object at ffff88800d96a828 [ 31.235078] which belongs to the cache vm_area_struct of size 168 [ 31.236894] The buggy address is located 88 bytes inside of [ 31.236894] freed 168-byte region [ffff88800d96a828, ffff88800d96a8d0) [ 31.238614] [ 31.238865] The buggy address belongs to the physical page: [ 31.239664] page:000000008a973a40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd96a [ 31.240950] memcg:ffff88800df2f101 [ 31.241455] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.242304] page_type: 0xffffffff() [ 31.242827] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c4640 0000000000000007 [ 31.243924] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df2f101 [ 31.245029] page dumped because: kasan: bad access detected [ 31.245833] [ 31.246087] Memory state around the buggy address: [ 31.246785] ffff88800d96a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.247810] ffff88800d96a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.248853] >ffff88800d96a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.249873] ^ [ 31.250360] ffff88800d96a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.251384] ffff88800d96a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.252409] ================================================================== [ 31.253503] Disabling lock debugging due to kernel taint [ 33.690485] BUG: Bad rss-counter state mm:0000000008db2c45 type:MM_FILEPAGES val:33 [ 33.691569] BUG: Bad rss-counter state mm:0000000008db2c45 type:MM_ANONPAGES val:22 [ 34.185870] BUG: Bad rss-counter state mm:0000000080d75c01 type:MM_FILEPAGES val:33 [ 34.187022] BUG: Bad rss-counter state mm:0000000080d75c01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11542' (ECDSA) to the list of known hosts. 2023/06/21 05:36:03 fuzzer started 2023/06/21 05:36:03 dialing manager at localhost:36067 2023/06/21 05:36:03 checking machine... 2023/06/21 05:36:03 checking revisions... [ 34.966180] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:36:04 testing simple program... [ 35.005483] cgroup: Unknown subsys name 'net' [ 35.055529] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:36:03 Registers: info registers vcpu 0 RAX=ffff888014678001 RBX=ffff888014677520 RCX=0000000000000001 RDX=ffff888014677528 RSI=ffff8880146774f0 RDI=ffff888014677530 RBP=ffff888014670000 RSP=ffff888014677460 R8 =0000000000000001 R9 =ffff888014677560 R10=0000000000038001 R11=0000000000006097 R12=ffff888014677580 R13=ffff888014677568 R14=ffff8880146774f0 R15=ffff888014677520 RIP=ffffffff81131cda RFL=00000202 [-------] 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 00007f8112296900 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=00007f81117b5008 CR3=000000000d7d4000 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=d47541d0d18d429eb2464921c1a3946c XMM02=000000000011bf80eff9b2d0a8fce9cb XMM03=000000000011c0502c67c8bc2e329bc3 XMM04=c3462e827db7ad9f00000000000ae988 XMM05=3637b548ca9b35610000000000133cc0 XMM06=19e9129bd510f2350000000000132b58 XMM07=fb795ef6d65770560000000000122cf8 XMM08=2c67c8bc2e329bc3000000000011bff0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880145ff1f0 RCX=0000000000000001 RDX=1ffff110028bfe40 RSI=ffff8880145ff860 RDI=ffff8880145ff200 RBP=ffff8880145ff860 RSP=ffff8880145ff148 R8 =0000000000000001 R9 =ffff8880145ff230 R10=0000000000038001 R11=0000000000091b45 R12=0000000000000008 R13=ffff8880145f8000 R14=ffff8880145ff860 R15=ffff8880145ff1f0 RIP=ffffffff8113046e 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 00007f783370f900 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=00007ffe53895000 CR3=000000000c95a000 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=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