syzkaller login: [ 23.730668] BUG: Bad rss-counter state mm:0000000023f82146 type:MM_FILEPAGES val:33 [ 23.732622] BUG: Bad rss-counter state mm:0000000023f82146 type:MM_ANONPAGES val:22 [ 23.901107] ================================================================== [ 23.902017] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.902988] Read of size 8 at addr ffff8880189ce4e0 by task sshd/219 [ 23.903770] [ 23.904111] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.905001] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.905984] Call Trace: [ 23.906315] <TASK> [ 23.906633] dump_stack_lvl+0x91/0xf0 [ 23.907170] print_report+0xcc/0x620 [ 23.907651] ? __virt_addr_valid+0x102/0x340 [ 23.908212] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.908828] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.909447] kasan_report+0xbe/0xf0 [ 23.909920] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.910542] vma_interval_tree_remove+0xc75/0xec0 [ 23.911207] vma_prepare+0xc54/0x11a0 [ 23.911686] __split_vma+0x5af/0x950 [ 23.912160] ? __pfx___split_vma+0x10/0x10 [ 23.912697] ? find_held_lock+0x2c/0x110 [ 23.913221] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.913787] ? lock_is_held_type+0x9f/0x120 [ 23.914328] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.914984] ? mtree_range_walk+0x632/0x900 [ 23.915552] ? mas_walk+0x5c7/0x7c0 [ 23.916035] do_vmi_munmap+0x1f1/0x2b0 [ 23.916531] mmap_region+0x1f9/0x2660 [ 23.917015] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.917522] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.918238] ? __pfx_lock_acquire+0x10/0x10 [ 23.918773] ? __pfx_mmap_region+0x10/0x10 [ 23.919342] ? security_mmap_addr+0x7d/0xa0 [ 23.919879] ? get_unmapped_area+0x1f5/0x3f0 [ 23.920430] do_mmap+0x854/0xf00 [ 23.920864] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.921374] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.921936] ksys_mmap_pgoff+0x3af/0x500 [ 23.922448] do_syscall_64+0x3f/0x90 [ 23.922957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.923606] RIP: 0033:0x7f5ddaf34d82 [ 23.924061] 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 [ 23.926185] RSP: 002b:00007ffc90a6c3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.927117] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ddaf34d82 [ 23.927957] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5dda36e000 [ 23.928806] RBP: 00007f5dda36e000 R08: 0000000000000009 R09: 0000000000001000 [ 23.929647] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a56eb87ec0 [ 23.930486] R13: 00007ffc90a6c400 R14: 00007ffc90a6c430 R15: 00007ffc90a6c790 [ 23.931370] </TASK> [ 23.931664] [ 23.931881] Allocated by task 212: [ 23.932310] kasan_save_stack+0x22/0x50 [ 23.932817] kasan_set_track+0x25/0x30 [ 23.933313] __kasan_slab_alloc+0x59/0x70 [ 23.933832] kmem_cache_alloc+0x16b/0x370 [ 23.934345] vm_area_dup+0x20/0x160 [ 23.934794] __split_vma+0x170/0x950 [ 23.935300] split_vma+0xc6/0x110 [ 23.935738] mprotect_fixup+0x8d2/0xb30 [ 23.936242] do_mprotect_pkey+0x87e/0xd40 [ 23.936755] __x64_sys_mprotect+0x78/0xc0 [ 23.937270] do_syscall_64+0x3f/0x90 [ 23.937741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.938378] [ 23.938593] Freed by task 212: [ 23.939015] kasan_save_stack+0x22/0x50 [ 23.939519] kasan_set_track+0x25/0x30 [ 23.940013] kasan_save_free_info+0x2b/0x50 [ 23.940541] __kasan_slab_free+0x10a/0x190 [ 23.941065] kmem_cache_free+0x10d/0x4d0 [ 23.941565] rcu_core+0x8c8/0x2860 [ 23.942003] __do_softirq+0x1b7/0x7d4 [ 23.942488] [ 23.942702] Last potentially related work creation: [ 23.943329] kasan_save_stack+0x22/0x50 [ 23.943827] __kasan_record_aux_stack+0x8e/0xa0 [ 23.944399] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.945093] remove_vma+0x139/0x170 [ 23.945541] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.946093] do_vmi_munmap+0x1f1/0x2b0 [ 23.946577] __vm_munmap+0x138/0x3a0 [ 23.947084] __x64_sys_munmap+0x59/0x80 [ 23.947592] do_syscall_64+0x3f/0x90 [ 23.948065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.948709] [ 23.948926] Second to last potentially related work creation: [ 23.949613] kasan_save_stack+0x22/0x50 [ 23.950116] __kasan_record_aux_stack+0x8e/0xa0 [ 23.950690] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.951372] remove_vma+0x139/0x170 [ 23.951823] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.952379] do_vmi_munmap+0x1f1/0x2b0 [ 23.952858] __vm_munmap+0x138/0x3a0 [ 23.953324] __x64_sys_munmap+0x59/0x80 [ 23.953813] do_syscall_64+0x3f/0x90 [ 23.954292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.954973] [ 23.955188] The buggy address belongs to the object at ffff8880189ce488 [ 23.955188] which belongs to the cache vm_area_struct of size 168 [ 23.956651] The buggy address is located 88 bytes inside of [ 23.956651] freed 168-byte region [ffff8880189ce488, ffff8880189ce530) [ 23.958056] [ 23.958276] The buggy address belongs to the physical page: [ 23.958960] page:00000000c5ca77f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x189ce [ 23.960053] memcg:ffff88800c7ec601 [ 23.960475] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.961179] page_type: 0xffffffff() [ 23.961630] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 23.962550] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7ec601 [ 23.963490] page dumped because: kasan: bad access detected [ 23.964157] [ 23.964371] Memory state around the buggy address: [ 23.964956] ffff8880189ce380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.965804] ffff8880189ce400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.966677] >ffff8880189ce480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.967558] ^ [ 23.968325] ffff8880189ce500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 23.969180] ffff8880189ce580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.970043] ================================================================== [ 23.971013] Disabling lock debugging due to kernel taint [ 26.608037] BUG: Bad rss-counter state mm:000000004af36035 type:MM_FILEPAGES val:33 [ 26.609618] BUG: Bad rss-counter state mm:000000004af36035 type:MM_ANONPAGES val:22 [ 27.036617] BUG: Bad rss-counter state mm:00000000f9b6cf62 type:MM_FILEPAGES val:33 [ 27.038115] BUG: Bad rss-counter state mm:00000000f9b6cf62 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9959' (ECDSA) to the list of known hosts. 2023/06/21 07:22:00 fuzzer started 2023/06/21 07:22:00 dialing manager at localhost:36067 2023/06/21 07:22:00 checking machine... 2023/06/21 07:22:00 checking revisions... [ 27.765306] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:22:00 testing simple program... [ 27.817348] cgroup: Unknown subsys name 'net' [ 27.874640] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:21:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=dffffc0000000000 RSI=000000000000132f RDI=ffff88801691f4a0 RBP=ffff88801691f4f8 RSP=ffff88801691f3e0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88801691f500 R13=ffff88801691f4e8 R14=ffff88801691f4e1 R15=ffff88801691f4a0 RIP=ffffffff81130764 RFL=00000283 [--S---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 00007f3a61251700 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=00007fbf64e89ae0 CR3=000000000df3c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732039353a3132 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383332 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880159c8f00 RBX=0000000000000004 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880159c8f08 RBP=ffff8880166cf500 RSP=ffff8880166cf448 R8 =0000000000000000 R9 =0000000000000000 R10=ffff8880159c8f08 R11=000005b7000005b7 R12=ffff888014305500 R13=0000000000000008 R14=ffff8880166cf500 R15=0000000000000fc0 RIP=ffffffff822464e7 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 00007f65c5f92900 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=00007ffd0f8cf000 CR3=000000001c9fe000 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