[ 70.810084] BUG: Bad rss-counter state mm:00000000a464c291 type:MM_FILEPAGES val:33 [ 70.811772] BUG: Bad rss-counter state mm:00000000a464c291 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 70.978184] ================================================================== [ 70.979324] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.980514] Read of size 8 at addr ffff88800fbe7c20 by task sshd/224 [ 70.981649] [ 70.981935] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 70.982908] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.983915] Call Trace: [ 70.984242] [ 70.984539] dump_stack_lvl+0x91/0xf0 [ 70.985037] print_report+0xcc/0x620 [ 70.985573] ? __virt_addr_valid+0x102/0x340 [ 70.986134] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.986783] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.987424] kasan_report+0xbe/0xf0 [ 70.987908] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.988549] vma_interval_tree_remove+0xc75/0xec0 [ 70.989168] vma_prepare+0xc54/0x11a0 [ 70.989680] __split_vma+0x5af/0x950 [ 70.990163] ? __pfx___split_vma+0x10/0x10 [ 70.990724] ? find_held_lock+0x2c/0x110 [ 70.991257] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.991830] ? lock_is_held_type+0x9f/0x120 [ 70.992381] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.992993] ? mtree_range_walk+0x632/0x900 [ 70.993593] ? mas_walk+0x5c7/0x7c0 [ 70.994065] do_vmi_munmap+0x1f1/0x2b0 [ 70.994581] mmap_region+0x1f9/0x2660 [ 70.995067] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.995594] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.996325] ? __pfx_lock_acquire+0x10/0x10 [ 70.996870] ? __pfx_mmap_region+0x10/0x10 [ 70.997442] ? security_mmap_addr+0x7d/0xa0 [ 70.997977] ? get_unmapped_area+0x1f5/0x3f0 [ 70.998551] do_mmap+0x854/0xf00 [ 70.999001] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.999512] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.000080] ksys_mmap_pgoff+0x3af/0x500 [ 71.000627] do_syscall_64+0x3f/0x90 [ 71.001117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.001809] RIP: 0033:0x7f55d032cd82 [ 71.002283] 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 [ 71.004462] RSP: 002b:00007ffe302476a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 71.005406] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55d032cd82 [ 71.006269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55cf766000 [ 71.007141] RBP: 00007f55cf766000 R08: 0000000000000009 R09: 0000000000001000 [ 71.008008] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602da89eb20 [ 71.008873] R13: 00007ffe302476c0 R14: 00007ffe302476f0 R15: 00007ffe30247a50 [ 71.009782] [ 71.010077] [ 71.010314] Allocated by task 217: [ 71.010751] kasan_save_stack+0x22/0x50 [ 71.011276] kasan_set_track+0x25/0x30 [ 71.011783] __kasan_slab_alloc+0x59/0x70 [ 71.012330] kmem_cache_alloc+0x16b/0x370 [ 71.012847] vm_area_dup+0x20/0x160 [ 71.013312] __split_vma+0x170/0x950 [ 71.013791] split_vma+0xc6/0x110 [ 71.014248] mprotect_fixup+0x8d2/0xb30 [ 71.014776] do_mprotect_pkey+0x87e/0xd40 [ 71.015313] __x64_sys_mprotect+0x78/0xc0 [ 71.015833] do_syscall_64+0x3f/0x90 [ 71.016324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.016977] [ 71.017192] Freed by task 203: [ 71.017612] kasan_save_stack+0x22/0x50 [ 71.018125] kasan_set_track+0x25/0x30 [ 71.018654] kasan_save_free_info+0x2b/0x50 [ 71.019197] __kasan_slab_free+0x10a/0x190 [ 71.019796] kmem_cache_free+0x10d/0x4d0 [ 71.020326] rcu_core+0x8c8/0x2860 [ 71.020784] __do_softirq+0x1b7/0x7d4 [ 71.021276] [ 71.021513] Last potentially related work creation: [ 71.022105] kasan_save_stack+0x22/0x50 [ 71.022643] __kasan_record_aux_stack+0x8e/0xa0 [ 71.023305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.023956] remove_vma+0x139/0x170 [ 71.024425] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.024991] do_vmi_munmap+0x1f1/0x2b0 [ 71.025505] __vm_munmap+0x138/0x3a0 [ 71.025979] __x64_sys_munmap+0x59/0x80 [ 71.026508] do_syscall_64+0x3f/0x90 [ 71.026996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.027672] [ 71.027885] The buggy address belongs to the object at ffff88800fbe7bc8 [ 71.027885] which belongs to the cache vm_area_struct of size 168 [ 71.029414] The buggy address is located 88 bytes inside of [ 71.029414] freed 168-byte region [ffff88800fbe7bc8, ffff88800fbe7c70) [ 71.030872] [ 71.031091] The buggy address belongs to the physical page: [ 71.031767] page:000000005a62aa48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbe7 [ 71.032873] memcg:ffff88800fdf1b01 [ 71.033314] flags: 0x100000000000200(slab|node=0|zone=1) [ 71.033977] page_type: 0xffffffff() [ 71.034454] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 71.035386] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdf1b01 [ 71.036307] page dumped because: kasan: bad access detected [ 71.036971] [ 71.037186] Memory state around the buggy address: [ 71.037792] ffff88800fbe7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.038677] ffff88800fbe7b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 71.039554] >ffff88800fbe7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 71.040420] ^ [ 71.040947] ffff88800fbe7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 71.041838] ffff88800fbe7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 71.042719] ================================================================== [ 71.043651] Disabling lock debugging due to kernel taint [ 73.004983] BUG: Bad rss-counter state mm:00000000ac04213d type:MM_FILEPAGES val:33 [ 73.005996] BUG: Bad rss-counter state mm:00000000ac04213d type:MM_ANONPAGES val:22 [ 73.500511] BUG: Bad rss-counter state mm:00000000687128d1 type:MM_FILEPAGES val:33 [ 73.501528] BUG: Bad rss-counter state mm:00000000687128d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26804' (ECDSA) to the list of known hosts. 2023/06/20 01:06:15 fuzzer started 2023/06/20 01:06:15 dialing manager at localhost:44161 2023/06/20 01:06:15 checking machine... 2023/06/20 01:06:15 checking revisions... [ 74.273840] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:06:15 testing simple program... [ 74.321885] cgroup: Unknown subsys name 'net' [ 74.381382] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:06:04 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888015ae9b40 RCX=0000000080000000 RDX=ffff888015ae9b40 RSI=ffffffff81704afc RDI=ffffffff849f03c0 RBP=ffffffff849f03c0 RSP=ffff888019e87b80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=0000000000000000 R12=000000000000000e R13=ffff888019e87bf8 R14=ffff888019e87cf8 R15=ffff888019e87cd8 RIP=ffffffff814c07f1 RFL=00000293 [--S-A-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 00007f9b4d003700 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=00007f50ffcc1df0 CR3=0000000016826000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3333325b646873732034313a3630 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323833 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b18 RCX=ffffffff86128101 RDX=1ffff1100d9e138a RSI=ffffffff84506c7f RDI=ffff88806cf09b24 RBP=ffff88806cf09c50 RSP=ffff88806cf09a30 R8 =ffffffff86128140 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000001e4e6 R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff8880146f1b40 R15=ffff88800c5ba500 RIP=ffffffff813ad4f7 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 00007f2caba5e900 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=00007f2caba3d020 CR3=00000000146a6000 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