syzkaller login: [ 76.065524] BUG: Bad rss-counter state mm:000000000e2cc424 type:MM_FILEPAGES val:33 [ 76.066712] BUG: Bad rss-counter state mm:000000000e2cc424 type:MM_ANONPAGES val:22 [ 76.231359] ================================================================== [ 76.232432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 76.233533] Read of size 8 at addr ffff888018fefd08 by task sshd/222 [ 76.234625] [ 76.234887] CPU: 1 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 76.236098] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 76.237186] Call Trace: [ 76.237509] [ 76.237794] dump_stack_lvl+0x91/0xf0 [ 76.238308] print_report+0xcc/0x620 [ 76.238802] ? __virt_addr_valid+0x102/0x340 [ 76.239366] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.239989] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.240620] kasan_report+0xbe/0xf0 [ 76.241102] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.241727] vma_interval_tree_remove+0xc75/0xec0 [ 76.242341] vma_prepare+0xc54/0x11a0 [ 76.242824] __split_vma+0x5af/0x950 [ 76.243296] ? __pfx___split_vma+0x10/0x10 [ 76.243840] ? find_held_lock+0x2c/0x110 [ 76.244360] do_vmi_align_munmap+0x2ba/0x11f0 [ 76.244930] ? lock_is_held_type+0x9f/0x120 [ 76.245461] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 76.246091] ? mtree_range_walk+0x632/0x900 [ 76.246643] ? mas_walk+0x5c7/0x7c0 [ 76.247128] do_vmi_munmap+0x1f1/0x2b0 [ 76.247618] mmap_region+0x1f9/0x2660 [ 76.248096] ? vm_mmap_pgoff+0x15c/0x3a0 [ 76.248605] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 76.249321] ? __pfx_lock_acquire+0x10/0x10 [ 76.249869] ? __pfx_mmap_region+0x10/0x10 [ 76.250405] ? security_mmap_addr+0x7d/0xa0 [ 76.250940] ? get_unmapped_area+0x1f5/0x3f0 [ 76.251485] do_mmap+0x854/0xf00 [ 76.251926] vm_mmap_pgoff+0x1a6/0x3a0 [ 76.252423] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 76.252993] ksys_mmap_pgoff+0x3af/0x500 [ 76.253508] do_syscall_64+0x3f/0x90 [ 76.253984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.254655] RIP: 0033:0x7ff71d921d82 [ 76.255118] 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 [ 76.257267] RSP: 002b:00007ffd983ba8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 76.258193] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff71d921d82 [ 76.259041] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff71cd5b000 [ 76.259905] RBP: 00007ff71cd5b000 R08: 0000000000000009 R09: 0000000000001000 [ 76.260754] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557642f12ec0 [ 76.261606] R13: 00007ffd983ba900 R14: 00007ffd983ba930 R15: 00007ffd983bac90 [ 76.262477] [ 76.262783] [ 76.263002] Allocated by task 214: [ 76.263434] kasan_save_stack+0x22/0x50 [ 76.263939] kasan_set_track+0x25/0x30 [ 76.264443] __kasan_slab_alloc+0x59/0x70 [ 76.264968] kmem_cache_alloc+0x16b/0x370 [ 76.265493] vm_area_dup+0x20/0x160 [ 76.265956] __split_vma+0x170/0x950 [ 76.266447] split_vma+0xc6/0x110 [ 76.266894] mprotect_fixup+0x8d2/0xb30 [ 76.267411] do_mprotect_pkey+0x87e/0xd40 [ 76.267944] __x64_sys_mprotect+0x78/0xc0 [ 76.268473] do_syscall_64+0x3f/0x90 [ 76.268955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.269595] [ 76.269810] Freed by task 204: [ 76.270220] kasan_save_stack+0x22/0x50 [ 76.270727] kasan_set_track+0x25/0x30 [ 76.271224] kasan_save_free_info+0x2b/0x50 [ 76.271754] __kasan_slab_free+0x10a/0x190 [ 76.272288] kmem_cache_free+0x10d/0x4d0 [ 76.272807] rcu_core+0x8c8/0x2860 [ 76.273253] __do_softirq+0x1b7/0x7d4 [ 76.273724] [ 76.273937] Last potentially related work creation: [ 76.274534] kasan_save_stack+0x22/0x50 [ 76.275087] __kasan_record_aux_stack+0x8e/0xa0 [ 76.275673] __call_rcu_common.constprop.0+0x6a/0xb90 [ 76.276325] remove_vma+0x139/0x170 [ 76.276780] do_vmi_align_munmap+0xd4a/0x11f0 [ 76.277346] do_vmi_munmap+0x1f1/0x2b0 [ 76.277840] __vm_munmap+0x138/0x3a0 [ 76.278324] __x64_sys_munmap+0x59/0x80 [ 76.278830] do_syscall_64+0x3f/0x90 [ 76.279309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.279952] [ 76.280167] The buggy address belongs to the object at ffff888018fefcb0 [ 76.280167] which belongs to the cache vm_area_struct of size 168 [ 76.281645] The buggy address is located 88 bytes inside of [ 76.281645] freed 168-byte region [ffff888018fefcb0, ffff888018fefd58) [ 76.283070] [ 76.283289] The buggy address belongs to the physical page: [ 76.283954] page:0000000015212c60 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18fef [ 76.285055] memcg:ffff88801650a401 [ 76.285486] flags: 0x100000000000200(slab|node=0|zone=1) [ 76.286150] page_type: 0xffffffff() [ 76.286603] raw: 0100000000000200 ffff88800879fc80 ffffea0000594300 dead00000000000a [ 76.287517] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801650a401 [ 76.288431] page dumped because: kasan: bad access detected [ 76.289094] [ 76.289309] Memory state around the buggy address: [ 76.289884] ffff888018fefc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 76.290765] ffff888018fefc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 76.291615] >ffff888018fefd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 76.292463] ^ [ 76.292903] ffff888018fefd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 76.293764] ffff888018fefe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 76.294639] ================================================================== [ 76.295590] Disabling lock debugging due to kernel taint [ 78.664827] BUG: Bad rss-counter state mm:000000000231f7f1 type:MM_FILEPAGES val:33 [ 78.666028] BUG: Bad rss-counter state mm:000000000231f7f1 type:MM_ANONPAGES val:22 [ 79.170342] BUG: Bad rss-counter state mm:000000004d89e65f type:MM_FILEPAGES val:33 [ 79.171860] BUG: Bad rss-counter state mm:000000004d89e65f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63338' (ECDSA) to the list of known hosts. 2023/06/19 14:59:41 fuzzer started 2023/06/19 14:59:41 dialing manager at localhost:44161 2023/06/19 14:59:41 checking machine... 2023/06/19 14:59:41 checking revisions... [ 79.921143] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:59:41 testing simple program... [ 79.970202] cgroup: Unknown subsys name 'net' [ 80.028954] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:58:56 Registers: info registers vcpu 0 RAX=0000000080010002 RBX=00000000ffffffff RCX=0000000000000000 RDX=ffffffff8542a6c0 RSI=ffffffff813c7e78 RDI=0000000000000006 RBP=ffff88806ce09db8 RSP=ffff88806ce09cf0 R8 =0000000000000006 R9 =00000000002aa4fc R10=0000000000315ebc R11=ffff88806ce09ff8 R12=0000000000000015 R13=ffffffffffffffff R14=0000000000315ebc R15=0000000000000015 RIP=ffffffff813cc344 RFL=00000006 [-----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 0000000000000000 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=00007fffd3b38fa8 CR3=0000000005482000 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=00007f0bf839451000005584925d2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff1100d9e502f RSI=0000000000000003 RDI=0000000000000004 RBP=00000012643b01c0 RSP=ffff888019857e58 R8 =0000000000000007 R9 =7fffffffffffffff R10=00000012643b01c0 R11=0000000000000001 R12=ffff88806cf28140 R13=0000000000000003 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff814c0384 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3fc8cb3700 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=00007f1d05c04400 CR3=0000000018e4a000 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=2030343a39353a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a39353a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000