[ 30.133893] BUG: Bad rss-counter state mm:000000005247f0be type:MM_FILEPAGES val:33 [ 30.135096] BUG: Bad rss-counter state mm:000000005247f0be type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.296456] ================================================================== [ 30.297369] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.298316] Read of size 8 at addr ffff8880100086b0 by task sshd/220 [ 30.299088] [ 30.299310] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.300290] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.301296] Call Trace: [ 30.301640] [ 30.301935] dump_stack_lvl+0x91/0xf0 [ 30.302431] print_report+0xcc/0x620 [ 30.302926] ? __virt_addr_valid+0x102/0x340 [ 30.303496] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.304117] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.304746] kasan_report+0xbe/0xf0 [ 30.305233] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.305858] vma_interval_tree_remove+0xc75/0xec0 [ 30.306457] vma_prepare+0xc54/0x11a0 [ 30.306935] __split_vma+0x5af/0x950 [ 30.307406] ? __pfx___split_vma+0x10/0x10 [ 30.307945] ? find_held_lock+0x2c/0x110 [ 30.308480] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.309049] ? lock_is_held_type+0x9f/0x120 [ 30.309604] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.310224] ? mtree_range_walk+0x632/0x900 [ 30.310784] ? mas_walk+0x5c7/0x7c0 [ 30.311263] do_vmi_munmap+0x1f1/0x2b0 [ 30.311769] mmap_region+0x1f9/0x2660 [ 30.312260] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.312796] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.313512] ? __pfx_lock_acquire+0x10/0x10 [ 30.314050] ? __pfx_mmap_region+0x10/0x10 [ 30.314591] ? security_mmap_addr+0x7d/0xa0 [ 30.315127] ? get_unmapped_area+0x1f5/0x3f0 [ 30.315687] do_mmap+0x854/0xf00 [ 30.316134] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.316650] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.317218] ksys_mmap_pgoff+0x3af/0x500 [ 30.317732] do_syscall_64+0x3f/0x90 [ 30.318216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.318871] RIP: 0033:0x7f09f48d8d82 [ 30.319336] 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 [ 30.321495] RSP: 002b:00007fff66fb1258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.322413] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09f48d8d82 [ 30.323268] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f09f3d12000 [ 30.324124] RBP: 00007f09f3d12000 R08: 0000000000000009 R09: 0000000000001000 [ 30.324997] R10: 0000000000000812 R11: 0000000000000206 R12: 000055edbf3d9ec0 [ 30.325852] R13: 00007fff66fb1270 R14: 00007fff66fb12a0 R15: 00007fff66fb1600 [ 30.326715] [ 30.327008] [ 30.327227] Allocated by task 213: [ 30.327663] kasan_save_stack+0x22/0x50 [ 30.328175] kasan_set_track+0x25/0x30 [ 30.328688] __kasan_slab_alloc+0x59/0x70 [ 30.329217] kmem_cache_alloc+0x16b/0x370 [ 30.329733] vm_area_dup+0x20/0x160 [ 30.330194] __split_vma+0x170/0x950 [ 30.330663] split_vma+0xc6/0x110 [ 30.331101] mprotect_fixup+0x8d2/0xb30 [ 30.331608] do_mprotect_pkey+0x87e/0xd40 [ 30.332126] __x64_sys_mprotect+0x78/0xc0 [ 30.332679] do_syscall_64+0x3f/0x90 [ 30.333157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.333810] [ 30.334029] Freed by task 213: [ 30.334422] kasan_save_stack+0x22/0x50 [ 30.334927] kasan_set_track+0x25/0x30 [ 30.335420] kasan_save_free_info+0x2b/0x50 [ 30.335945] __kasan_slab_free+0x10a/0x190 [ 30.336489] kmem_cache_free+0x10d/0x4d0 [ 30.336999] rcu_core+0x8c8/0x2860 [ 30.337452] __do_softirq+0x1b7/0x7d4 [ 30.337941] [ 30.338157] Last potentially related work creation: [ 30.338743] kasan_save_stack+0x22/0x50 [ 30.339245] __kasan_record_aux_stack+0x8e/0xa0 [ 30.339824] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.340496] remove_vma+0x139/0x170 [ 30.340950] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.341509] do_vmi_munmap+0x1f1/0x2b0 [ 30.341996] __vm_munmap+0x138/0x3a0 [ 30.342468] __x64_sys_munmap+0x59/0x80 [ 30.342975] do_syscall_64+0x3f/0x90 [ 30.343453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.344100] [ 30.344317] The buggy address belongs to the object at ffff888010008658 [ 30.344317] which belongs to the cache vm_area_struct of size 168 [ 30.345810] The buggy address is located 88 bytes inside of [ 30.345810] freed 168-byte region [ffff888010008658, ffff888010008700) [ 30.347222] [ 30.347445] The buggy address belongs to the physical page: [ 30.348104] page:0000000083e4b81b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10008 [ 30.349221] memcg:ffff88800cb28601 [ 30.349657] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.350307] page_type: 0xffffffff() [ 30.350768] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.351707] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb28601 [ 30.352645] page dumped because: kasan: bad access detected [ 30.353301] [ 30.353518] Memory state around the buggy address: [ 30.354095] ffff888010008580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.354944] ffff888010008600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.355795] >ffff888010008680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.356653] ^ [ 30.357235] ffff888010008700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.358089] ffff888010008780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.358933] ================================================================== [ 30.359889] Disabling lock debugging due to kernel taint [ 32.229693] BUG: Bad rss-counter state mm:00000000f8e4a401 type:MM_FILEPAGES val:33 [ 32.230880] BUG: Bad rss-counter state mm:00000000f8e4a401 type:MM_ANONPAGES val:22 [ 32.669946] BUG: Bad rss-counter state mm:000000003c4d8508 type:MM_FILEPAGES val:33 [ 32.671106] BUG: Bad rss-counter state mm:000000003c4d8508 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32163' (ECDSA) to the list of known hosts. 2023/06/20 17:09:50 fuzzer started 2023/06/20 17:09:50 dialing manager at localhost:36067 2023/06/20 17:09:50 checking machine... 2023/06/20 17:09:50 checking revisions... [ 33.350358] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:09:50 testing simple program... [ 33.396109] cgroup: Unknown subsys name 'net' [ 33.434732] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:09:50 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800c188c98 RSP=ffff888016ed79d0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000081 R14=ffffffff856f0da0 R15=ffff88800c188c9a RIP=ffffffff814c03d4 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 00007fdfdaf56900 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=00007fdfdb50e0b0 CR3=000000000ee10000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007ffd0e6c96d8 CR3=000000000ca9c000 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=2039343a39303a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a39303a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000