[ 24.808441] BUG: Bad rss-counter state mm:000000005cc7791c type:MM_FILEPAGES val:33 [ 24.809851] BUG: Bad rss-counter state mm:000000005cc7791c type:MM_ANONPAGES val:22 [ 24.967436] ================================================================== [ 24.968482] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.969584] Read of size 8 at addr ffff88800cda8b38 by task sshd/220 [ 24.970646] [ 24.970872] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.971733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.972705] Call Trace: [ 24.973023] [ 24.973311] dump_stack_lvl+0x91/0xf0 [ 24.973795] print_report+0xcc/0x620 [ 24.974270] ? __virt_addr_valid+0x102/0x340 [ 24.974816] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.975436] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.976040] kasan_report+0xbe/0xf0 [ 24.976513] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.977121] vma_interval_tree_remove+0xc75/0xec0 [ 24.977716] vma_prepare+0xc54/0x11a0 [ 24.978187] __split_vma+0x5af/0x950 [ 24.978654] ? __pfx___split_vma+0x10/0x10 [ 24.979197] ? find_held_lock+0x2c/0x110 [ 24.979708] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.980268] ? lock_is_held_type+0x9f/0x120 [ 24.980797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.981403] ? mtree_range_walk+0x632/0x900 [ 24.981950] ? mas_walk+0x5c7/0x7c0 [ 24.982421] do_vmi_munmap+0x1f1/0x2b0 [ 24.982909] mmap_region+0x1f9/0x2660 [ 24.983400] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.983916] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.984619] ? __pfx_lock_acquire+0x10/0x10 [ 24.985151] ? __pfx_mmap_region+0x10/0x10 [ 24.985677] ? security_mmap_addr+0x7d/0xa0 [ 24.986206] ? get_unmapped_area+0x1f5/0x3f0 [ 24.986748] do_mmap+0x854/0xf00 [ 24.987195] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.987686] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.988246] ksys_mmap_pgoff+0x3af/0x500 [ 24.988747] do_syscall_64+0x3f/0x90 [ 24.989221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.989864] RIP: 0033:0x7f20ff608d82 [ 24.990322] 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 [ 24.992453] RSP: 002b:00007fff4e2e6cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.993360] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f20ff608d82 [ 24.994203] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f20fea42000 [ 24.995044] RBP: 00007f20fea42000 R08: 0000000000000009 R09: 0000000000001000 [ 24.995876] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557da0de7ec0 [ 24.996723] R13: 00007fff4e2e6d10 R14: 00007fff4e2e6d40 R15: 00007fff4e2e70a0 [ 24.997570] [ 24.997869] [ 24.998082] Allocated by task 208: [ 24.998509] kasan_save_stack+0x22/0x50 [ 24.999023] kasan_set_track+0x25/0x30 [ 24.999512] __kasan_slab_alloc+0x59/0x70 [ 25.000038] kmem_cache_alloc+0x16b/0x370 [ 25.000547] vm_area_dup+0x20/0x160 [ 25.000998] __split_vma+0x170/0x950 [ 25.001465] split_vma+0xc6/0x110 [ 25.001906] mprotect_fixup+0x8d2/0xb30 [ 25.002401] do_mprotect_pkey+0x87e/0xd40 [ 25.002921] __x64_sys_mprotect+0x78/0xc0 [ 25.003462] do_syscall_64+0x3f/0x90 [ 25.003932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.004568] [ 25.004782] Freed by task 208: [ 25.005170] kasan_save_stack+0x22/0x50 [ 25.005673] kasan_set_track+0x25/0x30 [ 25.006173] kasan_save_free_info+0x2b/0x50 [ 25.006704] __kasan_slab_free+0x10a/0x190 [ 25.007253] kmem_cache_free+0x10d/0x4d0 [ 25.007757] rcu_core+0x8c8/0x2860 [ 25.008195] __do_softirq+0x1b7/0x7d4 [ 25.008668] [ 25.008879] Last potentially related work creation: [ 25.009465] kasan_save_stack+0x22/0x50 [ 25.009963] __kasan_record_aux_stack+0x8e/0xa0 [ 25.010540] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.011262] remove_vma+0x139/0x170 [ 25.011714] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.012268] do_vmi_munmap+0x1f1/0x2b0 [ 25.012759] __vm_munmap+0x138/0x3a0 [ 25.013222] __x64_sys_munmap+0x59/0x80 [ 25.013711] do_syscall_64+0x3f/0x90 [ 25.014184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.014819] [ 25.015039] Second to last potentially related work creation: [ 25.015723] kasan_save_stack+0x22/0x50 [ 25.016232] __kasan_record_aux_stack+0x8e/0xa0 [ 25.016803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.017438] remove_vma+0x139/0x170 [ 25.017886] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.018444] do_vmi_munmap+0x1f1/0x2b0 [ 25.018927] mmap_region+0x1f9/0x2660 [ 25.019426] do_mmap+0x854/0xf00 [ 25.019854] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.020348] ksys_mmap_pgoff+0x3af/0x500 [ 25.020842] do_syscall_64+0x3f/0x90 [ 25.021311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.021949] [ 25.022168] The buggy address belongs to the object at ffff88800cda8ae0 [ 25.022168] which belongs to the cache vm_area_struct of size 168 [ 25.023639] The buggy address is located 88 bytes inside of [ 25.023639] freed 168-byte region [ffff88800cda8ae0, ffff88800cda8b88) [ 25.025029] [ 25.025249] The buggy address belongs to the physical page: [ 25.025900] page:000000009ae57404 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcda8 [ 25.026970] memcg:ffff88800cbecc01 [ 25.027411] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.028051] page_type: 0xffffffff() [ 25.028501] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 25.029417] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbecc01 [ 25.030319] page dumped because: kasan: bad access detected [ 25.030974] [ 25.031204] Memory state around the buggy address: [ 25.031781] ffff88800cda8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.032635] ffff88800cda8a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 25.033482] >ffff88800cda8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.034325] ^ [ 25.034927] ffff88800cda8b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 25.035807] ffff88800cda8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 25.036653] ================================================================== [ 25.037650] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.199974] BUG: Bad rss-counter state mm:00000000750f88dc type:MM_FILEPAGES val:33 [ 27.201421] BUG: Bad rss-counter state mm:00000000750f88dc type:MM_ANONPAGES val:22 [ 27.712339] BUG: Bad rss-counter state mm:00000000b8a65556 type:MM_FILEPAGES val:33 [ 27.713334] BUG: Bad rss-counter state mm:00000000b8a65556 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20169' (ECDSA) to the list of known hosts. 2023/06/20 01:25:35 fuzzer started 2023/06/20 01:25:35 dialing manager at localhost:44161 2023/06/20 01:25:35 checking machine... 2023/06/20 01:25:35 checking revisions... [ 28.438226] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:25:36 testing simple program... [ 28.477091] cgroup: Unknown subsys name 'net' [ 28.532969] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:25:34 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffe4f0e34c8 CR3=000000000dbde000 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=2035333a35323a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a35323a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860d68f6 RBX=0000000000000001 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffff888008e579b0 RSP=ffff888008e578e8 R8 =ffffffff860d68c0 R9 =ffff888008e57998 R10=0000000000038001 R11=0000000000010b7e R12=ffff888008e579b8 R13=ffff888008e579a0 R14=ffff888008e57999 R15=ffff888008e57958 RIP=ffffffff81130881 RFL=00000282 [--S----] 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 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=00007fffe2a5b000 CR3=000000001a514000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000