syzkaller login: [ 38.733254] BUG: Bad rss-counter state mm:000000009ad01b3b type:MM_FILEPAGES val:33 [ 38.734278] BUG: Bad rss-counter state mm:000000009ad01b3b type:MM_ANONPAGES val:22 [ 38.896440] ================================================================== [ 38.897528] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.898404] Read of size 8 at addr ffff888017cfa968 by task sshd/219 [ 38.899227] [ 38.899436] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.900245] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.901172] Call Trace: [ 38.901472] [ 38.901742] dump_stack_lvl+0x91/0xf0 [ 38.902204] print_report+0xcc/0x620 [ 38.902685] ? __virt_addr_valid+0x102/0x340 [ 38.903208] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.903792] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.904369] kasan_report+0xbe/0xf0 [ 38.904817] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.905399] vma_interval_tree_remove+0xc75/0xec0 [ 38.905964] vma_prepare+0xc54/0x11a0 [ 38.906414] __split_vma+0x5af/0x950 [ 38.906865] ? __pfx___split_vma+0x10/0x10 [ 38.907365] ? find_held_lock+0x2c/0x110 [ 38.907866] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.908408] ? lock_is_held_type+0x9f/0x120 [ 38.908935] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.909512] ? mtree_range_walk+0x632/0x900 [ 38.910048] ? mas_walk+0x5c7/0x7c0 [ 38.910507] do_vmi_munmap+0x1f1/0x2b0 [ 38.910986] mmap_region+0x1f9/0x2660 [ 38.911450] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.911944] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.912637] ? __pfx_lock_acquire+0x10/0x10 [ 38.913159] ? __pfx_mmap_region+0x10/0x10 [ 38.913669] ? security_mmap_addr+0x7d/0xa0 [ 38.914188] ? get_unmapped_area+0x1f5/0x3f0 [ 38.914743] do_mmap+0x854/0xf00 [ 38.915174] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.915657] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.916207] ksys_mmap_pgoff+0x3af/0x500 [ 38.916702] do_syscall_64+0x3f/0x90 [ 38.917171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917796] RIP: 0033:0x7fd0e0713d82 [ 38.918226] 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 [ 38.920286] RSP: 002b:00007fff1c6dc348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.921161] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0e0713d82 [ 38.921982] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0dfb4d000 [ 38.922797] RBP: 00007fd0dfb4d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.923620] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643962f2ec0 [ 38.924440] R13: 00007fff1c6dc360 R14: 00007fff1c6dc390 R15: 00007fff1c6dc6f0 [ 38.925265] [ 38.925552] [ 38.925764] Allocated by task 212: [ 38.926185] kasan_save_stack+0x22/0x50 [ 38.926691] kasan_set_track+0x25/0x30 [ 38.927175] __kasan_slab_alloc+0x59/0x70 [ 38.927684] kmem_cache_alloc+0x16b/0x370 [ 38.928184] vm_area_dup+0x20/0x160 [ 38.928626] __split_vma+0x170/0x950 [ 38.929076] split_vma+0xc6/0x110 [ 38.929494] mprotect_fixup+0x8d2/0xb30 [ 38.929984] do_mprotect_pkey+0x87e/0xd40 [ 38.930485] __x64_sys_mprotect+0x78/0xc0 [ 38.930997] do_syscall_64+0x3f/0x90 [ 38.931449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932074] [ 38.932286] Freed by task 212: [ 38.932669] kasan_save_stack+0x22/0x50 [ 38.933157] kasan_set_track+0x25/0x30 [ 38.933641] kasan_save_free_info+0x2b/0x50 [ 38.934165] __kasan_slab_free+0x10a/0x190 [ 38.934686] kmem_cache_free+0x10d/0x4d0 [ 38.935181] rcu_core+0x8c8/0x2860 [ 38.935610] __do_softirq+0x1b7/0x7d4 [ 38.936080] [ 38.936288] Last potentially related work creation: [ 38.936853] kasan_save_stack+0x22/0x50 [ 38.937335] __kasan_record_aux_stack+0x8e/0xa0 [ 38.937894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.938506] remove_vma+0x139/0x170 [ 38.938959] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.939503] do_vmi_munmap+0x1f1/0x2b0 [ 38.939974] __vm_munmap+0x138/0x3a0 [ 38.940428] __x64_sys_munmap+0x59/0x80 [ 38.940903] do_syscall_64+0x3f/0x90 [ 38.941361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.941980] [ 38.942185] The buggy address belongs to the object at ffff888017cfa910 [ 38.942185] which belongs to the cache vm_area_struct of size 168 [ 38.943600] The buggy address is located 88 bytes inside of [ 38.943600] freed 168-byte region [ffff888017cfa910, ffff888017cfa9b8) [ 38.944959] [ 38.945168] The buggy address belongs to the physical page: [ 38.945801] page:000000000b47f9b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17cfa [ 38.946853] memcg:ffff888009466601 [ 38.947266] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.947895] page_type: 0xffffffff() [ 38.948327] raw: 0100000000000200 ffff8880087a0c80 ffffea00004f6e80 dead000000000006 [ 38.949213] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009466601 [ 38.950098] page dumped because: kasan: bad access detected [ 38.950752] [ 38.950967] Memory state around the buggy address: [ 38.951526] ffff888017cfa800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.952343] ffff888017cfa880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.953170] >ffff888017cfa900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.953988] ^ [ 38.954734] ffff888017cfa980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.955563] ffff888017cfaa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.956370] ================================================================== [ 38.957441] Disabling lock debugging due to kernel taint [ 40.932992] BUG: Bad rss-counter state mm:00000000a73f160b type:MM_FILEPAGES val:33 [ 40.934301] BUG: Bad rss-counter state mm:00000000a73f160b type:MM_ANONPAGES val:22 [ 41.365547] BUG: Bad rss-counter state mm:00000000030c9554 type:MM_FILEPAGES val:33 [ 41.366725] BUG: Bad rss-counter state mm:00000000030c9554 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29668' (ECDSA) to the list of known hosts. 2023/06/20 21:34:44 fuzzer started 2023/06/20 21:34:44 dialing manager at localhost:36067 2023/06/20 21:34:44 checking machine... 2023/06/20 21:34:44 checking revisions... [ 42.006786] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:34:44 testing simple program... [ 42.044137] cgroup: Unknown subsys name 'net' [ 42.081634] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:34:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880197a8c80 RCX=0000000000000000 RDX=ffff888017d751c0 RSI=ffffffff8367466a RDI=ffff8880197a8c80 RBP=ffffffff83860ae0 RSP=ffff888016ad7970 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ff00545000000000 R12=ffff8880197a8cd8 R13=ffff88801908b980 R14=ffff888016ad7a88 R15=00000000000000e8 RIP=ffffffff83860ae4 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 00007f878899f900 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=00007ffcabd1c000 CR3=0000000019988000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f9d2463a000 CR3=0000000016524000 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=2034343a34333a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a34333a3132203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000