syzkaller login: [ 37.223058] BUG: Bad rss-counter state mm:00000000deb14570 type:MM_FILEPAGES val:33 [ 37.223699] BUG: Bad rss-counter state mm:00000000deb14570 type:MM_ANONPAGES val:22 [ 37.363904] ================================================================== [ 37.364509] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.365123] Read of size 8 at addr ffff88800dbc4d08 by task sshd/220 [ 37.365620] [ 37.365767] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.366327] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.369175] Call Trace: [ 37.369386] [ 37.369576] dump_stack_lvl+0x91/0xf0 [ 37.369906] print_report+0xcc/0x620 [ 37.370224] ? __virt_addr_valid+0x102/0x340 [ 37.371212] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.371615] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.372108] kasan_report+0xbe/0xf0 [ 37.372428] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.372886] vma_interval_tree_remove+0xc75/0xec0 [ 37.373278] vma_prepare+0xc54/0x11a0 [ 37.373597] __split_vma+0x5af/0x950 [ 37.373960] ? __pfx___split_vma+0x10/0x10 [ 37.374306] ? find_held_lock+0x2c/0x110 [ 37.375200] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.375573] ? lock_is_held_type+0x9f/0x120 [ 37.375977] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.376378] ? mtree_range_walk+0x632/0x900 [ 37.376741] ? mas_walk+0x5c7/0x7c0 [ 37.377104] do_vmi_munmap+0x1f1/0x2b0 [ 37.377438] mmap_region+0x1f9/0x2660 [ 37.377805] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.378149] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.379381] ? __pfx_lock_acquire+0x10/0x10 [ 37.379802] ? __pfx_mmap_region+0x10/0x10 [ 37.380186] ? security_mmap_addr+0x7d/0xa0 [ 37.380536] ? get_unmapped_area+0x1f5/0x3f0 [ 37.380994] do_mmap+0x854/0xf00 [ 37.381293] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.381622] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.382045] ksys_mmap_pgoff+0x3af/0x500 [ 37.382383] do_syscall_64+0x3f/0x90 [ 37.383236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.383667] RIP: 0033:0x7fe155155d82 [ 37.384018] 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 [ 37.385429] RSP: 002b:00007ffdc3b9ad38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.386077] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe155155d82 [ 37.387187] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe15458f000 [ 37.387736] RBP: 00007fe15458f000 R08: 0000000000000009 R09: 0000000000001000 [ 37.388335] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563444dedf70 [ 37.388931] R13: 00007ffdc3b9ad50 R14: 00007ffdc3b9ad80 R15: 00007ffdc3b9b0e0 [ 37.389485] [ 37.389681] [ 37.389890] Allocated by task 212: [ 37.390172] kasan_save_stack+0x22/0x50 [ 37.390516] kasan_set_track+0x25/0x30 [ 37.391356] __kasan_slab_alloc+0x59/0x70 [ 37.391704] kmem_cache_alloc+0x16b/0x370 [ 37.392190] vm_area_dup+0x20/0x160 [ 37.392492] __split_vma+0x170/0x950 [ 37.392850] split_vma+0xc6/0x110 [ 37.393141] mprotect_fixup+0x8d2/0xb30 [ 37.393472] do_mprotect_pkey+0x87e/0xd40 [ 37.393872] __x64_sys_mprotect+0x78/0xc0 [ 37.394217] do_syscall_64+0x3f/0x90 [ 37.395015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.395448] [ 37.395593] Freed by task 212: [ 37.395900] kasan_save_stack+0x22/0x50 [ 37.396231] kasan_set_track+0x25/0x30 [ 37.396554] kasan_save_free_info+0x2b/0x50 [ 37.396947] __kasan_slab_free+0x10a/0x190 [ 37.397294] kmem_cache_free+0x10d/0x4d0 [ 37.397624] rcu_core+0x8c8/0x2860 [ 37.397970] __do_softirq+0x1b7/0x7d4 [ 37.398283] [ 37.398424] Last potentially related work creation: [ 37.399375] kasan_save_stack+0x22/0x50 [ 37.399709] __kasan_record_aux_stack+0x8e/0xa0 [ 37.400135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.400554] remove_vma+0x139/0x170 [ 37.400903] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.401272] do_vmi_munmap+0x1f1/0x2b0 [ 37.401594] __vm_munmap+0x138/0x3a0 [ 37.401956] __x64_sys_munmap+0x59/0x80 [ 37.402284] do_syscall_64+0x3f/0x90 [ 37.403160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.403582] [ 37.403727] The buggy address belongs to the object at ffff88800dbc4cb0 [ 37.403727] which belongs to the cache vm_area_struct of size 168 [ 37.404715] The buggy address is located 88 bytes inside of [ 37.404715] freed 168-byte region [ffff88800dbc4cb0, ffff88800dbc4d58) [ 37.405661] [ 37.405860] The buggy address belongs to the physical page: [ 37.406280] page:00000000ed0050db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbc4 [ 37.407629] memcg:ffff88800e696601 [ 37.409929] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.410351] page_type: 0xffffffff() [ 37.410801] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 37.411408] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e696601 [ 37.412040] page dumped because: kasan: bad access detected [ 37.412468] [ 37.412613] Memory state around the buggy address: [ 37.413040] ffff88800dbc4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.413595] ffff88800dbc4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.414201] >ffff88800dbc4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.415087] ^ [ 37.415380] ffff88800dbc4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.415988] ffff88800dbc4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.416535] ================================================================== [ 37.417199] Disabling lock debugging due to kernel taint [ 39.321260] BUG: Bad rss-counter state mm:0000000040820583 type:MM_FILEPAGES val:33 [ 39.322099] BUG: Bad rss-counter state mm:0000000040820583 type:MM_ANONPAGES val:22 [ 39.911094] BUG: Bad rss-counter state mm:000000004fddeb23 type:MM_FILEPAGES val:33 [ 39.912678] BUG: Bad rss-counter state mm:000000004fddeb23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26864' (ECDSA) to the list of known hosts. 2023/06/20 08:09:45 fuzzer started 2023/06/20 08:09:45 dialing manager at localhost:44161 2023/06/20 08:09:45 checking machine... 2023/06/20 08:09:45 checking revisions... [ 40.784526] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:09:45 testing simple program... [ 40.831019] cgroup: Unknown subsys name 'net' [ 40.915685] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:09:44 Registers: info registers vcpu 0 RAX=0000000000002818 RBX=ffffc90000662818 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff8301e8d5 RDI=ffff88800cf95536 RBP=00000000000000ce RSP=ffff888008d7fa00 R8 =0000000000000005 R9 =0000000000000000 R10=00000000000000ce R11=5552563412005452 R12=00000000000000cd R13=0000000000000000 R14=ffff88800cf95500 R15=ffffc90000757ce0 RIP=ffffffff8301e93f RFL=00000286 [--S--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 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=00007f9ac7f98bf0 CR3=00000000166b8000 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=2035343a39303a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a39303a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000061 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8 RSI=ffffffff82505fe5 RDI=ffffffff87f6c0a0 RBP=ffffffff87f6c060 RSP=ffff888018e17018 R8 =0000000000000001 R9 =000000000000000a R10=0000000000000061 R11=000000003a475542 R12=0000000000000061 R13=ffffffff87f6c060 R14=0000000000000010 R15=ffffffff82505fd0 RIP=ffffffff8250603d 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 00007f22304d8900 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=00007f578d195328 CR3=000000000fd24000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000