syzkaller login: [ 38.714757] BUG: Bad rss-counter state mm:00000000d3623e83 type:MM_FILEPAGES val:33 [ 38.716178] BUG: Bad rss-counter state mm:00000000d3623e83 type:MM_ANONPAGES val:22 [ 38.878751] ================================================================== [ 38.879875] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.880985] Read of size 8 at addr ffff8880099db310 by task sshd/220 [ 38.882046] [ 38.882267] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.883149] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.884165] Call Trace: [ 38.884500] <TASK> [ 38.884795] dump_stack_lvl+0x91/0xf0 [ 38.885293] print_report+0xcc/0x620 [ 38.885779] ? __virt_addr_valid+0x102/0x340 [ 38.886339] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.886955] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887581] kasan_report+0xbe/0xf0 [ 38.888086] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888729] vma_interval_tree_remove+0xc75/0xec0 [ 38.889357] vma_prepare+0xc54/0x11a0 [ 38.889845] __split_vma+0x5af/0x950 [ 38.890315] ? __pfx___split_vma+0x10/0x10 [ 38.890849] ? find_held_lock+0x2c/0x110 [ 38.891402] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.891975] ? lock_is_held_type+0x9f/0x120 [ 38.892520] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.893128] ? mtree_range_walk+0x632/0x900 [ 38.893691] ? mas_walk+0x5c7/0x7c0 [ 38.894181] do_vmi_munmap+0x1f1/0x2b0 [ 38.894676] mmap_region+0x1f9/0x2660 [ 38.895176] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.895697] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.896427] ? __pfx_lock_acquire+0x10/0x10 [ 38.896970] ? __pfx_mmap_region+0x10/0x10 [ 38.897503] ? security_mmap_addr+0x7d/0xa0 [ 38.898044] ? get_unmapped_area+0x1f5/0x3f0 [ 38.898594] do_mmap+0x854/0xf00 [ 38.899048] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.899552] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.900136] ksys_mmap_pgoff+0x3af/0x500 [ 38.900648] do_syscall_64+0x3f/0x90 [ 38.901131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.901799] RIP: 0033:0x7f9859a34d82 [ 38.902264] 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 [ 38.904453] RSP: 002b:00007ffc94f827c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.905375] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9859a34d82 [ 38.906250] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9858e6e000 [ 38.907122] RBP: 00007f9858e6e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.907975] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556390e62ec0 [ 38.908841] R13: 00007ffc94f827e0 R14: 00007ffc94f82810 R15: 00007ffc94f82b70 [ 38.909729] </TASK> [ 38.910022] [ 38.910242] Allocated by task 213: [ 38.910679] kasan_save_stack+0x22/0x50 [ 38.911211] kasan_set_track+0x25/0x30 [ 38.911721] __kasan_slab_alloc+0x59/0x70 [ 38.912244] kmem_cache_alloc+0x16b/0x370 [ 38.912766] vm_area_dup+0x20/0x160 [ 38.913228] __split_vma+0x170/0x950 [ 38.913696] split_vma+0xc6/0x110 [ 38.914144] mprotect_fixup+0x8d2/0xb30 [ 38.914650] do_mprotect_pkey+0x87e/0xd40 [ 38.915194] __x64_sys_mprotect+0x78/0xc0 [ 38.915713] do_syscall_64+0x3f/0x90 [ 38.916191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.916840] [ 38.917065] Freed by task 204: [ 38.917465] kasan_save_stack+0x22/0x50 [ 38.917975] kasan_set_track+0x25/0x30 [ 38.918469] kasan_save_free_info+0x2b/0x50 [ 38.919007] __kasan_slab_free+0x10a/0x190 [ 38.919563] kmem_cache_free+0x10d/0x4d0 [ 38.920072] rcu_core+0x8c8/0x2860 [ 38.920526] __do_softirq+0x1b7/0x7d4 [ 38.921016] [ 38.921233] Last potentially related work creation: [ 38.921823] kasan_save_stack+0x22/0x50 [ 38.922337] __kasan_record_aux_stack+0x8e/0xa0 [ 38.923016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.923681] remove_vma+0x139/0x170 [ 38.924142] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.924715] do_vmi_munmap+0x1f1/0x2b0 [ 38.925208] __vm_munmap+0x138/0x3a0 [ 38.925684] __x64_sys_munmap+0x59/0x80 [ 38.926180] do_syscall_64+0x3f/0x90 [ 38.926667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927328] [ 38.927543] Second to last potentially related work creation: [ 38.928235] kasan_save_stack+0x22/0x50 [ 38.928741] __kasan_record_aux_stack+0x8e/0xa0 [ 38.929327] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.929966] remove_vma+0x139/0x170 [ 38.930427] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.930991] do_vmi_munmap+0x1f1/0x2b0 [ 38.931503] mmap_region+0x1f9/0x2660 [ 38.931991] do_mmap+0x854/0xf00 [ 38.932426] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.932919] ksys_mmap_pgoff+0x3af/0x500 [ 38.933420] do_syscall_64+0x3f/0x90 [ 38.933905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.934562] [ 38.934780] The buggy address belongs to the object at ffff8880099db2b8 [ 38.934780] which belongs to the cache vm_area_struct of size 168 [ 38.936297] The buggy address is located 88 bytes inside of [ 38.936297] freed 168-byte region [ffff8880099db2b8, ffff8880099db360) [ 38.937706] [ 38.937922] The buggy address belongs to the physical page: [ 38.938579] page:0000000045ca9afd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99db [ 38.939688] memcg:ffff88800cc1c401 [ 38.940118] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.940817] page_type: 0xffffffff() [ 38.941271] raw: 0100000000000200 ffff8880087a0c80 ffffea0000375300 dead000000000005 [ 38.942205] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc1c401 [ 38.943112] page dumped because: kasan: bad access detected [ 38.943778] [ 38.943991] Memory state around the buggy address: [ 38.944569] ffff8880099db200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.945426] ffff8880099db280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.946282] >ffff8880099db300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.947147] ^ [ 38.947616] ffff8880099db380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.948474] ffff8880099db400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.949323] ================================================================== [ 38.950277] Disabling lock debugging due to kernel taint [ 40.992145] BUG: Bad rss-counter state mm:000000009202dccb type:MM_FILEPAGES val:33 [ 40.993313] BUG: Bad rss-counter state mm:000000009202dccb type:MM_ANONPAGES val:22 [ 41.466594] BUG: Bad rss-counter state mm:000000006627cfd0 type:MM_FILEPAGES val:33 [ 41.468258] BUG: Bad rss-counter state mm:000000006627cfd0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37420' (ECDSA) to the list of known hosts. 2023/06/20 12:31:18 fuzzer started 2023/06/20 12:31:18 dialing manager at localhost:36067 2023/06/20 12:31:18 checking machine... 2023/06/20 12:31:18 checking revisions... [ 42.215402] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:31:18 testing simple program... [ 42.266985] cgroup: Unknown subsys name 'net' [ 42.319361] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:31:18 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff8608a556 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888015caf9b8 RSP=ffff888015caf8a0 R8 =ffffffff8608a55a R9 =ffff888015caf9a0 R10=0000000000038001 R11=0000000000003c0d R12=ffff888015caf9c0 R13=ffff888015caf9a8 R14=ffff888015cafa08 R15=ffff888015caf960 RIP=ffffffff81130bc6 RFL=00000297 [--S-APC] 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 00007f8978404900 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=00007fff18cf7000 CR3=0000000016c58000 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=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 info registers vcpu 1 RAX=0000000000000050 RBX=ffff88800c4a8000 RCX=0000000000000000 RDX=00000000000103f6 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000103f6 RSP=ffff88800ba8f7d0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000103f6 R11=0000000000000128 R12=00000000000103f6 R13=ffffed1001895001 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--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 0000000000000000 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=00007effac8bb8f0 CR3=000000000d8c6000 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=2038313a31333a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a31333a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000