[ 23.736366] BUG: Bad rss-counter state mm:000000000c491c90 type:MM_FILEPAGES val:33 [ 23.737632] BUG: Bad rss-counter state mm:000000000c491c90 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.891454] ================================================================== [ 23.892398] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.893450] Read of size 8 at addr ffff88800dfe6058 by task sshd/218 [ 23.894214] [ 23.894430] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.895322] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.896288] Call Trace: [ 23.896608] [ 23.896895] dump_stack_lvl+0x91/0xf0 [ 23.897382] print_report+0xcc/0x620 [ 23.897864] ? __virt_addr_valid+0x102/0x340 [ 23.898417] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.899044] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.899657] kasan_report+0xbe/0xf0 [ 23.900131] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.900752] vma_interval_tree_remove+0xc75/0xec0 [ 23.901352] vma_prepare+0xc54/0x11a0 [ 23.901834] __split_vma+0x5af/0x950 [ 23.902306] ? __pfx___split_vma+0x10/0x10 [ 23.902853] ? find_held_lock+0x2c/0x110 [ 23.903374] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.903934] ? lock_is_held_type+0x9f/0x120 [ 23.904469] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.905076] ? mtree_range_walk+0x632/0x900 [ 23.905624] ? mas_walk+0x5c7/0x7c0 [ 23.906100] do_vmi_munmap+0x1f1/0x2b0 [ 23.906590] mmap_region+0x1f9/0x2660 [ 23.907077] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.907588] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.908297] ? __pfx_lock_acquire+0x10/0x10 [ 23.908830] ? __pfx_mmap_region+0x10/0x10 [ 23.909357] ? security_mmap_addr+0x7d/0xa0 [ 23.909889] ? get_unmapped_area+0x1f5/0x3f0 [ 23.910429] do_mmap+0x854/0xf00 [ 23.910879] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.911371] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.911937] ksys_mmap_pgoff+0x3af/0x500 [ 23.912440] do_syscall_64+0x3f/0x90 [ 23.912921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.913565] RIP: 0033:0x7f05bc392d82 [ 23.914018] 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 [ 23.916151] RSP: 002b:00007ffebb4adeb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.917054] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05bc392d82 [ 23.917905] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05bb7cc000 [ 23.918751] RBP: 00007f05bb7cc000 R08: 0000000000000009 R09: 0000000000001000 [ 23.919621] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb3f24ff70 [ 23.920472] R13: 00007ffebb4aded0 R14: 00007ffebb4adf00 R15: 00007ffebb4ae260 [ 23.921321] [ 23.921616] [ 23.921837] Allocated by task 211: [ 23.922259] kasan_save_stack+0x22/0x50 [ 23.922765] kasan_set_track+0x25/0x30 [ 23.923266] __kasan_slab_alloc+0x59/0x70 [ 23.923783] kmem_cache_alloc+0x16b/0x370 [ 23.924294] vm_area_dup+0x20/0x160 [ 23.924757] __split_vma+0x170/0x950 [ 23.925230] split_vma+0xc6/0x110 [ 23.925672] mprotect_fixup+0x8d2/0xb30 [ 23.926172] do_mprotect_pkey+0x87e/0xd40 [ 23.926696] __x64_sys_mprotect+0x78/0xc0 [ 23.927233] do_syscall_64+0x3f/0x90 [ 23.927710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.928357] [ 23.928571] Freed by task 211: [ 23.928973] kasan_save_stack+0x22/0x50 [ 23.929478] kasan_set_track+0x25/0x30 [ 23.929973] kasan_save_free_info+0x2b/0x50 [ 23.930510] __kasan_slab_free+0x10a/0x190 [ 23.931052] kmem_cache_free+0x10d/0x4d0 [ 23.931568] rcu_core+0x8c8/0x2860 [ 23.932010] __do_softirq+0x1b7/0x7d4 [ 23.932485] [ 23.932701] Last potentially related work creation: [ 23.933285] kasan_save_stack+0x22/0x50 [ 23.933784] __kasan_record_aux_stack+0x8e/0xa0 [ 23.934360] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.935011] remove_vma+0x139/0x170 [ 23.935462] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.936021] do_vmi_munmap+0x1f1/0x2b0 [ 23.936507] __vm_munmap+0x138/0x3a0 [ 23.936975] __x64_sys_munmap+0x59/0x80 [ 23.937479] do_syscall_64+0x3f/0x90 [ 23.937960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.938602] [ 23.938819] Second to last potentially related work creation: [ 23.939523] kasan_save_stack+0x22/0x50 [ 23.940030] __kasan_record_aux_stack+0x8e/0xa0 [ 23.940607] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.941249] remove_vma+0x139/0x170 [ 23.941697] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.942259] do_vmi_munmap+0x1f1/0x2b0 [ 23.942742] mmap_region+0x1f9/0x2660 [ 23.943227] do_mmap+0x854/0xf00 [ 23.943659] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.944149] ksys_mmap_pgoff+0x3af/0x500 [ 23.944652] do_syscall_64+0x3f/0x90 [ 23.945141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.945782] [ 23.946000] The buggy address belongs to the object at ffff88800dfe6000 [ 23.946000] which belongs to the cache vm_area_struct of size 168 [ 23.947472] The buggy address is located 88 bytes inside of [ 23.947472] freed 168-byte region [ffff88800dfe6000, ffff88800dfe60a8) [ 23.948880] [ 23.949096] The buggy address belongs to the physical page: [ 23.949755] page:00000000a2cf953c refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800dfe63a0 pfn:0xdfe6 [ 23.950995] memcg:ffff88800d5f8401 [ 23.951418] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.952060] page_type: 0xffffffff() [ 23.952511] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d8590 ffffea000036f190 [ 23.953429] raw: ffff88800dfe63a0 0000000000110006 00000001ffffffff ffff88800d5f8401 [ 23.954351] page dumped because: kasan: bad access detected [ 23.955009] [ 23.955223] Memory state around the buggy address: [ 23.955809] ffff88800dfe5f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.956662] ffff88800dfe5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.957527] >ffff88800dfe6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.958379] ^ [ 23.959112] ffff88800dfe6080: fb fb fb fb fb fc fc fc fc fc fc fc fc fb fb fb [ 23.959972] ffff88800dfe6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.960831] ================================================================== [ 23.961856] Disabling lock debugging due to kernel taint [ 25.934828] BUG: Bad rss-counter state mm:00000000c8225a53 type:MM_FILEPAGES val:33 [ 25.936027] BUG: Bad rss-counter state mm:00000000c8225a53 type:MM_ANONPAGES val:22 [ 26.426971] BUG: Bad rss-counter state mm:000000007a06b951 type:MM_FILEPAGES val:33 [ 26.428340] BUG: Bad rss-counter state mm:000000007a06b951 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28852' (ECDSA) to the list of known hosts. 2023/06/20 19:06:11 fuzzer started 2023/06/20 19:06:11 dialing manager at localhost:36067 2023/06/20 19:06:11 checking machine... 2023/06/20 19:06:11 checking revisions... [ 27.151195] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:06:11 testing simple program... [ 27.198059] cgroup: Unknown subsys name 'net' [ 27.233510] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:06:11 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=00007fbc9182d750 CR3=000000000da2a000 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=2031313a36303a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a36303a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8366a6e0 RBX=ffffffff85fa80cc RCX=ffffffff8366a63b RDX=0000000000000000 RSI=ffffffff863b7f8e RDI=ffffffff85fa80c8 RBP=ffffffff85fa80c8 RSP=ffff88800c557690 R8 =ffffffff863b7f8e R9 =ffff88800c557788 R10=0000000000038001 R11=000000000008b5c1 R12=ffffffff85fa80c8 R13=ffffffff85fa80c8 R14=ffffffff85fa80c8 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000283 [--S---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 00007fc3a1476900 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=00007ffc2c4db000 CR3=00000000094c4000 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=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