syzkaller login: [ 30.278038] BUG: Bad rss-counter state mm:000000001253445b type:MM_FILEPAGES val:33 [ 30.279247] BUG: Bad rss-counter state mm:000000001253445b type:MM_ANONPAGES val:22 [ 30.318160] ================================================================== [ 30.319086] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.320183] Read of size 8 at addr ffff888018fd0df0 by task sshd/220 [ 30.321091] [ 30.321317] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.322258] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.323231] Call Trace: [ 30.323570] [ 30.323856] dump_stack_lvl+0x91/0xf0 [ 30.324346] print_report+0xcc/0x620 [ 30.324830] ? __virt_addr_valid+0x102/0x340 [ 30.325395] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.326014] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.326629] kasan_report+0xbe/0xf0 [ 30.327105] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.327722] vma_interval_tree_remove+0xc75/0xec0 [ 30.328319] vma_prepare+0xc54/0x11a0 [ 30.328797] __split_vma+0x5af/0x950 [ 30.329264] ? __pfx___split_vma+0x10/0x10 [ 30.329806] ? find_held_lock+0x2c/0x110 [ 30.330326] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.330885] ? lock_is_held_type+0x9f/0x120 [ 30.331424] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.332029] ? mtree_range_walk+0x632/0x900 [ 30.332585] ? mas_walk+0x5c7/0x7c0 [ 30.333059] do_vmi_munmap+0x1f1/0x2b0 [ 30.333556] mmap_region+0x1f9/0x2660 [ 30.334036] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.334549] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.335260] ? __pfx_lock_acquire+0x10/0x10 [ 30.335803] ? __pfx_mmap_region+0x10/0x10 [ 30.336327] ? security_mmap_addr+0x7d/0xa0 [ 30.336860] ? get_unmapped_area+0x1f5/0x3f0 [ 30.337424] do_mmap+0x854/0xf00 [ 30.337864] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.338352] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.338915] ksys_mmap_pgoff+0x3af/0x500 [ 30.339420] do_syscall_64+0x3f/0x90 [ 30.339905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.340550] RIP: 0033:0x7f4e65634d82 [ 30.341010] 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 [ 30.343123] RSP: 002b:00007ffdec9987d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.344017] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e65634d82 [ 30.344856] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e64a6e000 [ 30.345707] RBP: 00007f4e64a6e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.346547] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d892e49f60 [ 30.347385] R13: 00007ffdec9987f0 R14: 00007ffdec998820 R15: 00007ffdec998b80 [ 30.348234] [ 30.348530] [ 30.348745] Allocated by task 213: [ 30.349168] kasan_save_stack+0x22/0x50 [ 30.349686] kasan_set_track+0x25/0x30 [ 30.350175] __kasan_slab_alloc+0x59/0x70 [ 30.350696] kmem_cache_alloc+0x16b/0x370 [ 30.351207] vm_area_dup+0x20/0x160 [ 30.351671] __split_vma+0x170/0x950 [ 30.352134] split_vma+0xc6/0x110 [ 30.352573] mprotect_fixup+0x8d2/0xb30 [ 30.353067] do_mprotect_pkey+0x87e/0xd40 [ 30.353588] __x64_sys_mprotect+0x78/0xc0 [ 30.354105] do_syscall_64+0x3f/0x90 [ 30.354580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.355226] [ 30.355438] Freed by task 213: [ 30.355831] kasan_save_stack+0x22/0x50 [ 30.356328] kasan_set_track+0x25/0x30 [ 30.356831] kasan_save_free_info+0x2b/0x50 [ 30.357366] __kasan_slab_free+0x10a/0x190 [ 30.357900] kmem_cache_free+0x10d/0x4d0 [ 30.358401] rcu_core+0x8c8/0x2860 [ 30.358845] __do_softirq+0x1b7/0x7d4 [ 30.359329] [ 30.359547] Last potentially related work creation: [ 30.360141] kasan_save_stack+0x22/0x50 [ 30.360644] __kasan_record_aux_stack+0x8e/0xa0 [ 30.361215] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.361868] remove_vma+0x139/0x170 [ 30.362319] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.362926] do_vmi_munmap+0x1f1/0x2b0 [ 30.363410] __vm_munmap+0x138/0x3a0 [ 30.363879] __x64_sys_munmap+0x59/0x80 [ 30.364377] do_syscall_64+0x3f/0x90 [ 30.364852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.365508] [ 30.365725] Second to last potentially related work creation: [ 30.366405] kasan_save_stack+0x22/0x50 [ 30.366910] __kasan_record_aux_stack+0x8e/0xa0 [ 30.367484] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.368124] remove_vma+0x139/0x170 [ 30.368579] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.369137] do_vmi_munmap+0x1f1/0x2b0 [ 30.369636] mmap_region+0x1f9/0x2660 [ 30.370114] do_mmap+0x854/0xf00 [ 30.370548] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.371036] ksys_mmap_pgoff+0x3af/0x500 [ 30.371541] do_syscall_64+0x3f/0x90 [ 30.372018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.372663] [ 30.372879] The buggy address belongs to the object at ffff888018fd0d98 [ 30.372879] which belongs to the cache vm_area_struct of size 168 [ 30.374352] The buggy address is located 88 bytes inside of [ 30.374352] freed 168-byte region [ffff888018fd0d98, ffff888018fd0e40) [ 30.375747] [ 30.375967] The buggy address belongs to the physical page: [ 30.376620] page:000000001d776fa6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18fd0 [ 30.377718] memcg:ffff88800eb76101 [ 30.378146] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.378845] page_type: 0xffffffff() [ 30.379296] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f1840 0000000000000005 [ 30.380216] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb76101 [ 30.381120] page dumped because: kasan: bad access detected [ 30.381795] [ 30.382014] Memory state around the buggy address: [ 30.382592] ffff888018fd0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.383446] ffff888018fd0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.384296] >ffff888018fd0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.385140] ^ [ 30.385956] ffff888018fd0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.386810] ffff888018fd0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.387663] ================================================================== [ 30.388765] Disabling lock debugging due to kernel taint [ 32.429110] BUG: Bad rss-counter state mm:000000006e446d60 type:MM_FILEPAGES val:33 [ 32.430517] BUG: Bad rss-counter state mm:000000006e446d60 type:MM_ANONPAGES val:22 [ 32.879863] BUG: Bad rss-counter state mm:00000000c96bf18f type:MM_FILEPAGES val:33 [ 32.881131] BUG: Bad rss-counter state mm:00000000c96bf18f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54973' (ECDSA) to the list of known hosts. 2023/06/20 20:06:09 fuzzer started 2023/06/20 20:06:10 dialing manager at localhost:36067 2023/06/20 20:06:10 checking machine... 2023/06/20 20:06:10 checking revisions... [ 33.651739] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:06:10 testing simple program... [ 33.697965] cgroup: Unknown subsys name 'net' [ 33.765618] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:06:09 Registers: info registers vcpu 0 RAX=00007fbd18728fef RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888017c48001 RSI=ffff888017c47f58 RDI=ffff888017c47fd8 RBP=ffff888017c47788 RSP=ffff888017c476b8 R8 =ffffffff864bbb58 R9 =ffff888017c47770 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888017c47790 R13=ffff888017c47778 R14=ffff888017c47f58 R15=ffff888017c47730 RIP=ffffffff8112fbf3 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 00007fbd178e5700 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=00007f5399124210 CR3=000000000f340000 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=2039303a36303a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a36303a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff85d92c20 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffffffff85d92c20 RSP=ffff88801ca2f7c0 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffffffff85d92c20 R14=ffffffff85d92c20 R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000206 [-----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 00007f571d507900 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=00007ffe596a3000 CR3=000000000947e000 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=563412feff00545000000000000080fe 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