syzkaller login: [ 38.745282] BUG: Bad rss-counter state mm:000000007ac744e4 type:MM_FILEPAGES val:33 [ 38.746386] BUG: Bad rss-counter state mm:000000007ac744e4 type:MM_ANONPAGES val:22 [ 38.881482] ================================================================== [ 38.882357] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.883287] Read of size 8 at addr ffff8880147f25c8 by task sshd/218 [ 38.884041] [ 38.884256] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.885150] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.886177] Call Trace: [ 38.886522] [ 38.886807] dump_stack_lvl+0x91/0xf0 [ 38.887287] print_report+0xcc/0x620 [ 38.887794] ? __virt_addr_valid+0x102/0x340 [ 38.888333] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888946] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889559] kasan_report+0xbe/0xf0 [ 38.890039] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890666] vma_interval_tree_remove+0xc75/0xec0 [ 38.891273] vma_prepare+0xc54/0x11a0 [ 38.891745] __split_vma+0x5af/0x950 [ 38.892212] ? __pfx___split_vma+0x10/0x10 [ 38.892727] ? find_held_lock+0x2c/0x110 [ 38.893247] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.893804] ? lock_is_held_type+0x9f/0x120 [ 38.894339] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.894963] ? mtree_range_walk+0x632/0x900 [ 38.895515] ? mas_walk+0x5c7/0x7c0 [ 38.895981] do_vmi_munmap+0x1f1/0x2b0 [ 38.896473] mmap_region+0x1f9/0x2660 [ 38.896948] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.897451] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.898145] ? __pfx_lock_acquire+0x10/0x10 [ 38.898691] ? __pfx_mmap_region+0x10/0x10 [ 38.899213] ? security_mmap_addr+0x7d/0xa0 [ 38.899735] ? get_unmapped_area+0x1f5/0x3f0 [ 38.900284] do_mmap+0x854/0xf00 [ 38.900717] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.901205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.901764] ksys_mmap_pgoff+0x3af/0x500 [ 38.902268] do_syscall_64+0x3f/0x90 [ 38.902753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903389] RIP: 0033:0x7f6237efdd82 [ 38.903835] 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 [ 38.905964] RSP: 002b:00007ffd2d4b7cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.906883] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6237efdd82 [ 38.907730] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6237337000 [ 38.908583] RBP: 00007f6237337000 R08: 0000000000000009 R09: 0000000000001000 [ 38.909430] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd57978ec0 [ 38.910275] R13: 00007ffd2d4b7ce0 R14: 00007ffd2d4b7d10 R15: 00007ffd2d4b8070 [ 38.911142] [ 38.911440] [ 38.911660] Allocated by task 211: [ 38.912092] kasan_save_stack+0x22/0x50 [ 38.912598] kasan_set_track+0x25/0x30 [ 38.913098] __kasan_slab_alloc+0x59/0x70 [ 38.913620] kmem_cache_alloc+0x16b/0x370 [ 38.914133] vm_area_dup+0x20/0x160 [ 38.914596] __split_vma+0x170/0x950 [ 38.915066] split_vma+0xc6/0x110 [ 38.915506] mprotect_fixup+0x8d2/0xb30 [ 38.916005] do_mprotect_pkey+0x87e/0xd40 [ 38.916522] __x64_sys_mprotect+0x78/0xc0 [ 38.917044] do_syscall_64+0x3f/0x90 [ 38.917521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918164] [ 38.918384] Freed by task 19: [ 38.918780] kasan_save_stack+0x22/0x50 [ 38.919287] kasan_set_track+0x25/0x30 [ 38.919786] kasan_save_free_info+0x2b/0x50 [ 38.920323] __kasan_slab_free+0x10a/0x190 [ 38.920864] kmem_cache_free+0x10d/0x4d0 [ 38.921382] rcu_core+0x8c8/0x2860 [ 38.921829] __do_softirq+0x1b7/0x7d4 [ 38.922315] [ 38.922546] Last potentially related work creation: [ 38.923134] kasan_save_stack+0x22/0x50 [ 38.923642] __kasan_record_aux_stack+0x8e/0xa0 [ 38.924222] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.924862] remove_vma+0x139/0x170 [ 38.925318] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.925876] do_vmi_munmap+0x1f1/0x2b0 [ 38.926437] __vm_munmap+0x138/0x3a0 [ 38.926926] __x64_sys_munmap+0x59/0x80 [ 38.927424] do_syscall_64+0x3f/0x90 [ 38.927901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928549] [ 38.928768] The buggy address belongs to the object at ffff8880147f2570 [ 38.928768] which belongs to the cache vm_area_struct of size 168 [ 38.930243] The buggy address is located 88 bytes inside of [ 38.930243] freed 168-byte region [ffff8880147f2570, ffff8880147f2618) [ 38.931657] [ 38.931877] The buggy address belongs to the physical page: [ 38.932535] page:000000005566a6ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147f2 [ 38.933620] memcg:ffff8880198be301 [ 38.934045] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.934695] page_type: 0xffffffff() [ 38.935145] raw: 0100000000000200 ffff8880087a0c80 ffffea0000379f40 dead000000000002 [ 38.936050] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198be301 [ 38.936958] page dumped because: kasan: bad access detected [ 38.937614] [ 38.937829] Memory state around the buggy address: [ 38.938416] ffff8880147f2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.939287] ffff8880147f2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.940151] >ffff8880147f2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.941007] ^ [ 38.941664] ffff8880147f2600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 38.942519] ffff8880147f2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.943366] ================================================================== [ 38.944280] Disabling lock debugging due to kernel taint [ 41.019341] BUG: Bad rss-counter state mm:00000000e414fc73 type:MM_FILEPAGES val:33 [ 41.020240] BUG: Bad rss-counter state mm:00000000e414fc73 type:MM_ANONPAGES val:22 [ 41.527925] BUG: Bad rss-counter state mm:00000000960fc7b6 type:MM_FILEPAGES val:33 [ 41.529069] BUG: Bad rss-counter state mm:00000000960fc7b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36713' (ECDSA) to the list of known hosts. 2023/06/20 14:34:45 fuzzer started 2023/06/20 14:34:45 dialing manager at localhost:36067 2023/06/20 14:34:45 checking machine... 2023/06/20 14:34:45 checking revisions... [ 42.271416] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:34:45 testing simple program... [ 42.323536] cgroup: Unknown subsys name 'net' [ 42.393419] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:34:45 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff6747cfb8 CR3=000000000e64e000 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=2034343a34333a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a34333a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000053 RCX=00000000b8412a15 RDX=000000000000001e RSI=0000000000000074 RDI=0000557bb8412a15 RBP=00007ffc962c7750 RSP=00007ffc962c7618 R8 =0000000000000029 R9 =00007ffc96377080 R10=0000000000000000 R11=00007ffc962c7680 R12=0000557bb8b26c30 R13=0000557bb8412a15 R14=0000000000000053 R15=0000000000000052 RIP=00007f5b693e94d2 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5b68abf900 00000000 00000000 GS =0000 0000000000000000 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=00007f9494d38650 CR3=0000000008c78000 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=78b24b0c585d2da37d4e1518d9ba5842 XMM02=ffffffffffffffffffffffffffffffff XMM03=000000000011a898ec2efd57dc4c00df XMM04=5fe11f8d8d2bc66400000000000ae988 XMM05=87522975cfefd0ea0000000000132270 XMM06=806171799158d9670000000000130cf0 XMM07=fb795ef6d65770560000000000121258 XMM08=2c67c8bc2e329bc3000000000011a898 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000