syzkaller login: [ 34.228497] BUG: Bad rss-counter state mm:000000008b04982e type:MM_FILEPAGES val:33 [ 34.229324] BUG: Bad rss-counter state mm:000000008b04982e type:MM_ANONPAGES val:22 [ 34.358408] ================================================================== [ 34.359499] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.360602] Read of size 8 at addr ffff88800b35c5c8 by task sshd/219 [ 34.361552] [ 34.361976] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.362821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.363562] Call Trace: [ 34.363813] [ 34.364041] dump_stack_lvl+0x91/0xf0 [ 34.364418] print_report+0xcc/0x620 [ 34.364795] ? __virt_addr_valid+0x102/0x340 [ 34.365218] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.365682] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.366154] kasan_report+0xbe/0xf0 [ 34.366531] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.367024] vma_interval_tree_remove+0xc75/0xec0 [ 34.367482] vma_prepare+0xc54/0x11a0 [ 34.367859] __split_vma+0x5af/0x950 [ 34.368219] ? __pfx___split_vma+0x10/0x10 [ 34.368613] ? find_held_lock+0x2c/0x110 [ 34.369026] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.369460] ? lock_is_held_type+0x9f/0x120 [ 34.369880] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.370349] ? mtree_range_walk+0x632/0x900 [ 34.370801] ? mas_walk+0x5c7/0x7c0 [ 34.371169] do_vmi_munmap+0x1f1/0x2b0 [ 34.371547] mmap_region+0x1f9/0x2660 [ 34.371942] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.372339] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.372897] ? __pfx_lock_acquire+0x10/0x10 [ 34.373304] ? __pfx_mmap_region+0x10/0x10 [ 34.373712] ? security_mmap_addr+0x7d/0xa0 [ 34.374128] ? get_unmapped_area+0x1f5/0x3f0 [ 34.374559] do_mmap+0x854/0xf00 [ 34.374903] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.375280] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.375715] ksys_mmap_pgoff+0x3af/0x500 [ 34.376102] do_syscall_64+0x3f/0x90 [ 34.376469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.376977] RIP: 0033:0x7fad09f56d82 [ 34.377326] 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 [ 34.378979] RSP: 002b:00007ffe3b9af278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.379675] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad09f56d82 [ 34.380327] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad09390000 [ 34.380981] RBP: 00007fad09390000 R08: 0000000000000009 R09: 0000000000001000 [ 34.381622] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6b614fec0 [ 34.382282] R13: 00007ffe3b9af290 R14: 00007ffe3b9af2c0 R15: 00007ffe3b9af620 [ 34.382964] [ 34.383189] [ 34.383352] Allocated by task 212: [ 34.383682] kasan_save_stack+0x22/0x50 [ 34.384075] kasan_set_track+0x25/0x30 [ 34.384450] __kasan_slab_alloc+0x59/0x70 [ 34.384860] kmem_cache_alloc+0x16b/0x370 [ 34.385252] vm_area_dup+0x20/0x160 [ 34.385597] __split_vma+0x170/0x950 [ 34.385955] split_vma+0xc6/0x110 [ 34.386291] mprotect_fixup+0x8d2/0xb30 [ 34.386684] do_mprotect_pkey+0x87e/0xd40 [ 34.387101] __x64_sys_mprotect+0x78/0xc0 [ 34.387501] do_syscall_64+0x3f/0x90 [ 34.387871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.388358] [ 34.388522] Freed by task 202: [ 34.388828] kasan_save_stack+0x22/0x50 [ 34.389210] kasan_set_track+0x25/0x30 [ 34.389593] kasan_save_free_info+0x2b/0x50 [ 34.389999] __kasan_slab_free+0x10a/0x190 [ 34.390415] kmem_cache_free+0x10d/0x4d0 [ 34.390814] rcu_core+0x8c8/0x2860 [ 34.391152] __do_softirq+0x1b7/0x7d4 [ 34.391519] [ 34.391680] Last potentially related work creation: [ 34.392134] kasan_save_stack+0x22/0x50 [ 34.392518] __kasan_record_aux_stack+0x8e/0xa0 [ 34.392955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.393445] remove_vma+0x139/0x170 [ 34.393791] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.394211] do_vmi_munmap+0x1f1/0x2b0 [ 34.394592] __vm_munmap+0x138/0x3a0 [ 34.394951] __x64_sys_munmap+0x59/0x80 [ 34.395325] do_syscall_64+0x3f/0x90 [ 34.395679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.396176] [ 34.396340] The buggy address belongs to the object at ffff88800b35c570 [ 34.396340] which belongs to the cache vm_area_struct of size 168 [ 34.397457] The buggy address is located 88 bytes inside of [ 34.397457] freed 168-byte region [ffff88800b35c570, ffff88800b35c618) [ 34.398542] [ 34.398703] The buggy address belongs to the physical page: [ 34.399206] page:00000000fcbf438a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb35c [ 34.400035] memcg:ffff888016e54801 [ 34.400357] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.400851] page_type: 0xffffffff() [ 34.401193] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.401907] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e54801 [ 34.402614] page dumped because: kasan: bad access detected [ 34.403118] [ 34.403281] Memory state around the buggy address: [ 34.403716] ffff88800b35c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.404367] ffff88800b35c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 34.405024] >ffff88800b35c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.405657] ^ [ 34.406195] ffff88800b35c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.406914] ffff88800b35c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.407561] ================================================================== [ 34.408706] Disabling lock debugging due to kernel taint [ 36.758143] BUG: Bad rss-counter state mm:00000000d8d19785 type:MM_FILEPAGES val:33 [ 36.758910] BUG: Bad rss-counter state mm:00000000d8d19785 type:MM_ANONPAGES val:22 [ 37.196157] BUG: Bad rss-counter state mm:0000000016483544 type:MM_FILEPAGES val:33 [ 37.197340] BUG: Bad rss-counter state mm:0000000016483544 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61856' (ECDSA) to the list of known hosts. 2023/06/19 19:31:30 fuzzer started 2023/06/19 19:31:30 dialing manager at localhost:44161 2023/06/19 19:31:30 checking machine... 2023/06/19 19:31:30 checking revisions... [ 37.928593] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:31:30 testing simple program... [ 37.982189] cgroup: Unknown subsys name 'net' [ 38.032537] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:31:26 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff85dfca24 RCX=ffffffff8180c584 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfca20 RSP=ffff88800efdf920 R8 =ffffffff86137508 R9 =ffff88800efdfa18 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca28 R13=ffffffff85dfc9fc R14=ffffffff85dfca1c R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 00007f0425066900 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=00007f042561e0b0 CR3=0000000019d00000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f302f2eb4c0 CR3=000000000c524000 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=0523ca1267cc81bcf64b0df52e8de4c7 XMM02=000000000011c810eff9b2d0a8fce9cb XMM03=000000000011c8e02c67c8bc2e329bc3 XMM04=f6e8f4859c41a48200000000000ae988 XMM05=dfcdbad4f1609c370000000000133880 XMM06=25d96f3cace0266700000000001326e8 XMM07=e042d86d42eb936e0000000000123f68 XMM08=fe2424a3c0708c02000000000011c8e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000