[ 30.785217] BUG: Bad rss-counter state mm:00000000d6692c0f type:MM_FILEPAGES val:33 [ 30.786436] BUG: Bad rss-counter state mm:00000000d6692c0f type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.921697] ================================================================== [ 30.922752] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.923851] Read of size 8 at addr ffff8880069346b0 by task sshd/220 [ 30.924924] [ 30.925182] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.926196] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.927458] Call Trace: [ 30.927836] [ 30.928186] dump_stack_lvl+0x91/0xf0 [ 30.928771] print_report+0xcc/0x620 [ 30.929341] ? __virt_addr_valid+0x102/0x340 [ 30.930001] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.930730] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.931476] kasan_report+0xbe/0xf0 [ 30.932060] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.932849] vma_interval_tree_remove+0xc75/0xec0 [ 30.933594] vma_prepare+0xc54/0x11a0 [ 30.934197] __split_vma+0x5af/0x950 [ 30.934778] ? __pfx___split_vma+0x10/0x10 [ 30.935433] ? find_held_lock+0x2c/0x110 [ 30.936077] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.936838] ? lock_is_held_type+0x9f/0x120 [ 30.937437] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.938039] ? mtree_range_walk+0x632/0x900 [ 30.938598] ? mas_walk+0x5c7/0x7c0 [ 30.939073] do_vmi_munmap+0x1f1/0x2b0 [ 30.939561] mmap_region+0x1f9/0x2660 [ 30.940039] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.940552] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.941262] ? __pfx_lock_acquire+0x10/0x10 [ 30.941789] ? __pfx_mmap_region+0x10/0x10 [ 30.942317] ? security_mmap_addr+0x7d/0xa0 [ 30.942841] ? get_unmapped_area+0x1f5/0x3f0 [ 30.943387] do_mmap+0x854/0xf00 [ 30.943823] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.944334] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.944897] ksys_mmap_pgoff+0x3af/0x500 [ 30.945404] do_syscall_64+0x3f/0x90 [ 30.945881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.946521] RIP: 0033:0x7f8f20f63d82 [ 30.946978] 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 [ 30.949116] RSP: 002b:00007ffe73e33f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.950022] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f20f63d82 [ 30.950880] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f2039d000 [ 30.951736] RBP: 00007f8f2039d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.952594] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8decd7f70 [ 30.953430] R13: 00007ffe73e33fb0 R14: 00007ffe73e33fe0 R15: 00007ffe73e34340 [ 30.954280] [ 30.954569] [ 30.954787] Allocated by task 213: [ 30.955209] kasan_save_stack+0x22/0x50 [ 30.955712] kasan_set_track+0x25/0x30 [ 30.956222] __kasan_slab_alloc+0x59/0x70 [ 30.956758] kmem_cache_alloc+0x16b/0x370 [ 30.957267] vm_area_dup+0x20/0x160 [ 30.957715] __split_vma+0x170/0x950 [ 30.958185] split_vma+0xc6/0x110 [ 30.958625] mprotect_fixup+0x8d2/0xb30 [ 30.959117] do_mprotect_pkey+0x87e/0xd40 [ 30.959634] __x64_sys_mprotect+0x78/0xc0 [ 30.960157] do_syscall_64+0x3f/0x90 [ 30.960627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.961273] [ 30.961487] Freed by task 213: [ 30.961872] kasan_save_stack+0x22/0x50 [ 30.962375] kasan_set_track+0x25/0x30 [ 30.962873] kasan_save_free_info+0x2b/0x50 [ 30.963409] __kasan_slab_free+0x10a/0x190 [ 30.963940] kmem_cache_free+0x10d/0x4d0 [ 30.964471] rcu_core+0x8c8/0x2860 [ 30.964930] __do_softirq+0x1b7/0x7d4 [ 30.965412] [ 30.965627] Last potentially related work creation: [ 30.966212] kasan_save_stack+0x22/0x50 [ 30.966717] __kasan_record_aux_stack+0x8e/0xa0 [ 30.967291] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.967936] remove_vma+0x139/0x170 [ 30.968407] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.968961] do_vmi_munmap+0x1f1/0x2b0 [ 30.969447] __vm_munmap+0x138/0x3a0 [ 30.969911] __x64_sys_munmap+0x59/0x80 [ 30.970416] do_syscall_64+0x3f/0x90 [ 30.970897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.971542] [ 30.971757] Second to last potentially related work creation: [ 30.972448] kasan_save_stack+0x22/0x50 [ 30.972947] __kasan_record_aux_stack+0x8e/0xa0 [ 30.973515] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.974150] remove_vma+0x139/0x170 [ 30.974598] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.975154] do_vmi_munmap+0x1f1/0x2b0 [ 30.975639] mmap_region+0x1f9/0x2660 [ 30.976135] do_mmap+0x854/0xf00 [ 30.976569] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.977059] ksys_mmap_pgoff+0x3af/0x500 [ 30.977567] do_syscall_64+0x3f/0x90 [ 30.978044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.978690] [ 30.978902] The buggy address belongs to the object at ffff888006934658 [ 30.978902] which belongs to the cache vm_area_struct of size 168 [ 30.980376] The buggy address is located 88 bytes inside of [ 30.980376] freed 168-byte region [ffff888006934658, ffff888006934700) [ 30.981765] [ 30.981981] The buggy address belongs to the physical page: [ 30.982635] page:000000001a78ae2a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6934 [ 30.983716] memcg:ffff88800d276201 [ 30.984145] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.984789] page_type: 0xffffffff() [ 30.985249] raw: 0100000000000200 ffff8880087a0c80 ffffea00001a58c0 dead000000000004 [ 30.986154] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d276201 [ 30.987065] page dumped because: kasan: bad access detected [ 30.987735] [ 30.987951] Memory state around the buggy address: [ 30.988544] ffff888006934580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.989393] ffff888006934600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.990244] >ffff888006934680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.991094] ^ [ 30.991677] ffff888006934700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.992539] ffff888006934780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.993379] ================================================================== [ 30.994527] Disabling lock debugging due to kernel taint [ 32.885635] BUG: Bad rss-counter state mm:0000000042c00570 type:MM_FILEPAGES val:33 [ 32.886763] BUG: Bad rss-counter state mm:0000000042c00570 type:MM_ANONPAGES val:22 [ 33.290360] BUG: Bad rss-counter state mm:000000007c41d6bf type:MM_FILEPAGES val:33 [ 33.291583] BUG: Bad rss-counter state mm:000000007c41d6bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23985' (ECDSA) to the list of known hosts. 2023/06/20 23:23:55 fuzzer started 2023/06/20 23:23:56 dialing manager at localhost:36067 2023/06/20 23:23:56 checking machine... 2023/06/20 23:23:56 checking revisions... [ 34.006761] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:23:56 testing simple program... [ 34.067806] cgroup: Unknown subsys name 'net' [ 34.140846] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:23:55 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=00007f3f1504f560 CR3=000000000eea0000 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=2035353a33323a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a33323a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007fbe899a6000 RCX=0000000000000000 RDX=ffff8880185cb680 RSI=00007fbe899a6000 RDI=ffffffffff600000 RBP=0000000000000001 RSP=ffff888016b16f50 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6a61 R12=ffff888016b17098 R13=0000000000000000 R14=ffff8880185cb680 R15=0000000000000000 RIP=ffffffff814c0430 RFL=00000206 [-----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 00007fbe88e14900 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=00007fbe88dbe008 CR3=000000001bce4000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000