syzkaller login: [ 31.012914] BUG: Bad rss-counter state mm:0000000040f291c8 type:MM_FILEPAGES val:33 [ 31.014118] BUG: Bad rss-counter state mm:0000000040f291c8 type:MM_ANONPAGES val:22 [ 31.163776] ================================================================== [ 31.164709] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.165660] Read of size 8 at addr ffff88800eb4f798 by task sshd/221 [ 31.166429] [ 31.166738] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.167593] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.168572] Call Trace: [ 31.168894] <TASK> [ 31.169185] dump_stack_lvl+0x91/0xf0 [ 31.169679] print_report+0xcc/0x620 [ 31.170169] ? __virt_addr_valid+0x102/0x340 [ 31.170720] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.171336] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.171956] kasan_report+0xbe/0xf0 [ 31.172438] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.173062] vma_interval_tree_remove+0xc75/0xec0 [ 31.173700] vma_prepare+0xc54/0x11a0 [ 31.174181] __split_vma+0x5af/0x950 [ 31.174658] ? __pfx___split_vma+0x10/0x10 [ 31.175192] ? find_held_lock+0x2c/0x110 [ 31.175714] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.176287] ? lock_is_held_type+0x9f/0x120 [ 31.176828] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.177452] ? mtree_range_walk+0x632/0x900 [ 31.178009] ? mas_walk+0x5c7/0x7c0 [ 31.178486] do_vmi_munmap+0x1f1/0x2b0 [ 31.178981] mmap_region+0x1f9/0x2660 [ 31.179468] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.179977] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.180694] ? __pfx_lock_acquire+0x10/0x10 [ 31.181242] ? __pfx_mmap_region+0x10/0x10 [ 31.181775] ? security_mmap_addr+0x7d/0xa0 [ 31.182313] ? get_unmapped_area+0x1f5/0x3f0 [ 31.182860] do_mmap+0x854/0xf00 [ 31.183298] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.183792] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.184351] ksys_mmap_pgoff+0x3af/0x500 [ 31.184862] do_syscall_64+0x3f/0x90 [ 31.185366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.186018] RIP: 0033:0x7fa21088ad82 [ 31.186480] 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 [ 31.188638] RSP: 002b:00007ffcbef79948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.189576] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa21088ad82 [ 31.190427] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa20fcc4000 [ 31.191273] RBP: 00007fa20fcc4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.192118] R10: 0000000000000812 R11: 0000000000000206 R12: 000056456d763ec0 [ 31.192977] R13: 00007ffcbef79960 R14: 00007ffcbef79990 R15: 00007ffcbef79cf0 [ 31.193846] </TASK> [ 31.194139] [ 31.194358] Allocated by task 214: [ 31.194791] kasan_save_stack+0x22/0x50 [ 31.195305] kasan_set_track+0x25/0x30 [ 31.195801] __kasan_slab_alloc+0x59/0x70 [ 31.196324] kmem_cache_alloc+0x16b/0x370 [ 31.196842] vm_area_dup+0x20/0x160 [ 31.197317] __split_vma+0x170/0x950 [ 31.197787] split_vma+0xc6/0x110 [ 31.198231] mprotect_fixup+0x8d2/0xb30 [ 31.198734] do_mprotect_pkey+0x87e/0xd40 [ 31.199258] __x64_sys_mprotect+0x78/0xc0 [ 31.199802] do_syscall_64+0x3f/0x90 [ 31.200301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.200952] [ 31.201175] Freed by task 214: [ 31.201576] kasan_save_stack+0x22/0x50 [ 31.202082] kasan_set_track+0x25/0x30 [ 31.202579] kasan_save_free_info+0x2b/0x50 [ 31.203113] __kasan_slab_free+0x10a/0x190 [ 31.203647] kmem_cache_free+0x10d/0x4d0 [ 31.204160] rcu_core+0x8c8/0x2860 [ 31.204609] __do_softirq+0x1b7/0x7d4 [ 31.205093] [ 31.205337] Last potentially related work creation: [ 31.205934] kasan_save_stack+0x22/0x50 [ 31.206444] __kasan_record_aux_stack+0x8e/0xa0 [ 31.207025] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.207684] remove_vma+0x139/0x170 [ 31.208149] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.208716] do_vmi_munmap+0x1f1/0x2b0 [ 31.209217] __vm_munmap+0x138/0x3a0 [ 31.209692] __x64_sys_munmap+0x59/0x80 [ 31.210201] do_syscall_64+0x3f/0x90 [ 31.210678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.211329] [ 31.211545] Second to last potentially related work creation: [ 31.212232] kasan_save_stack+0x22/0x50 [ 31.212737] __kasan_record_aux_stack+0x8e/0xa0 [ 31.213321] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.213966] remove_vma+0x139/0x170 [ 31.214415] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.214974] do_vmi_munmap+0x1f1/0x2b0 [ 31.215462] mmap_region+0x1f9/0x2660 [ 31.215940] do_mmap+0x854/0xf00 [ 31.216373] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.216858] ksys_mmap_pgoff+0x3af/0x500 [ 31.217379] do_syscall_64+0x3f/0x90 [ 31.217862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.218505] [ 31.218722] The buggy address belongs to the object at ffff88800eb4f740 [ 31.218722] which belongs to the cache vm_area_struct of size 168 [ 31.220198] The buggy address is located 88 bytes inside of [ 31.220198] freed 168-byte region [ffff88800eb4f740, ffff88800eb4f7e8) [ 31.221608] [ 31.221825] The buggy address belongs to the physical page: [ 31.222481] page:00000000985fd41e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb4f [ 31.223558] memcg:ffff88801671ac01 [ 31.223988] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.224633] page_type: 0xffffffff() [ 31.225095] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c0ac0 000000000000000e [ 31.226059] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801671ac01 [ 31.226963] page dumped because: kasan: bad access detected [ 31.227622] [ 31.227843] Memory state around the buggy address: [ 31.228427] ffff88800eb4f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.229302] ffff88800eb4f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.230158] >ffff88800eb4f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.231038] ^ [ 31.231550] ffff88800eb4f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.232430] ffff88800eb4f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.233300] ================================================================== [ 31.234276] Disabling lock debugging due to kernel taint [ 33.768913] BUG: Bad rss-counter state mm:0000000001312fa1 type:MM_FILEPAGES val:33 [ 33.769964] BUG: Bad rss-counter state mm:0000000001312fa1 type:MM_ANONPAGES val:22 [ 34.230689] BUG: Bad rss-counter state mm:00000000b453b607 type:MM_FILEPAGES val:33 [ 34.232718] BUG: Bad rss-counter state mm:00000000b453b607 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1038' (ECDSA) to the list of known hosts. 2023/06/21 08:50:50 fuzzer started 2023/06/21 08:50:50 dialing manager at localhost:36067 2023/06/21 08:50:50 checking machine... 2023/06/21 08:50:50 checking revisions... [ 34.919771] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:50:50 testing simple program... [ 34.974325] cgroup: Unknown subsys name 'net' [ 35.029550] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:50:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc3469bdc8 CR3=0000000005482000 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=00007fa923f395100000563cc87eb790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff8880183b0000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019fdf850 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000092c40 RIP=ffffffff814c02c5 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 00007f6fa0b0c900 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=00007f6fa10c40b0 CR3=0000000015b86000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000