[ 27.436131] BUG: Bad rss-counter state mm:0000000051ce22bb type:MM_FILEPAGES val:33 [ 27.437358] BUG: Bad rss-counter state mm:0000000051ce22bb type:MM_ANONPAGES val:22 [ 27.611401] ================================================================== [ 27.612373] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.613369] Read of size 8 at addr ffff88800ea77140 by task sshd/220 [ 27.614297] [ 27.614527] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.615438] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.616487] Call Trace: [ 27.616825] [ 27.617124] dump_stack_lvl+0x91/0xf0 [ 27.617640] print_report+0xcc/0x620 [ 27.618177] ? __virt_addr_valid+0x102/0x340 [ 27.618759] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.619419] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.620067] kasan_report+0xbe/0xf0 [ 27.620563] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.621207] vma_interval_tree_remove+0xc75/0xec0 [ 27.621835] vma_prepare+0xc54/0x11a0 [ 27.622349] __split_vma+0x5af/0x950 [ 27.622839] ? __pfx___split_vma+0x10/0x10 [ 27.623397] ? find_held_lock+0x2c/0x110 [ 27.623942] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.624533] ? lock_is_held_type+0x9f/0x120 [ 27.625098] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.625737] ? mtree_range_walk+0x632/0x900 [ 27.626322] ? mas_walk+0x5c7/0x7c0 [ 27.626811] do_vmi_munmap+0x1f1/0x2b0 [ 27.627327] mmap_region+0x1f9/0x2660 [ 27.627830] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.628383] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.629158] ? __pfx_lock_acquire+0x10/0x10 [ 27.629720] ? __pfx_mmap_region+0x10/0x10 [ 27.630303] ? security_mmap_addr+0x7d/0xa0 [ 27.630907] ? get_unmapped_area+0x1f5/0x3f0 [ 27.631471] do_mmap+0x854/0xf00 [ 27.631910] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.632405] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.632966] ksys_mmap_pgoff+0x3af/0x500 [ 27.633473] do_syscall_64+0x3f/0x90 [ 27.633950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.634612] RIP: 0033:0x7f272152ad82 [ 27.635067] 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 [ 27.637185] RSP: 002b:00007ffe2238a118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.638100] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f272152ad82 [ 27.638953] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2720964000 [ 27.639802] RBP: 00007f2720964000 R08: 0000000000000009 R09: 0000000000001000 [ 27.640647] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c91bbed90 [ 27.641518] R13: 00007ffe2238a130 R14: 00007ffe2238a160 R15: 00007ffe2238a4c0 [ 27.642480] [ 27.642786] [ 27.643021] Allocated by task 213: [ 27.643482] kasan_save_stack+0x22/0x50 [ 27.644032] kasan_set_track+0x25/0x30 [ 27.644570] __kasan_slab_alloc+0x59/0x70 [ 27.645139] kmem_cache_alloc+0x16b/0x370 [ 27.645694] vm_area_dup+0x20/0x160 [ 27.646194] __split_vma+0x170/0x950 [ 27.646737] split_vma+0xc6/0x110 [ 27.647211] mprotect_fixup+0x8d2/0xb30 [ 27.647748] do_mprotect_pkey+0x87e/0xd40 [ 27.648310] __x64_sys_mprotect+0x78/0xc0 [ 27.648870] do_syscall_64+0x3f/0x90 [ 27.649380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.650087] [ 27.650322] Freed by task 213: [ 27.650747] kasan_save_stack+0x22/0x50 [ 27.651294] kasan_set_track+0x25/0x30 [ 27.651822] kasan_save_free_info+0x2b/0x50 [ 27.652398] __kasan_slab_free+0x10a/0x190 [ 27.652971] kmem_cache_free+0x10d/0x4d0 [ 27.653519] rcu_core+0x8c8/0x2860 [ 27.653996] __do_softirq+0x1b7/0x7d4 [ 27.654517] [ 27.654752] Last potentially related work creation: [ 27.655388] kasan_save_stack+0x22/0x50 [ 27.655933] __kasan_record_aux_stack+0x8e/0xa0 [ 27.656544] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.657231] remove_vma+0x139/0x170 [ 27.657714] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.658332] do_vmi_munmap+0x1f1/0x2b0 [ 27.658859] __vm_munmap+0x138/0x3a0 [ 27.659355] __x64_sys_munmap+0x59/0x80 [ 27.659883] do_syscall_64+0x3f/0x90 [ 27.660389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.661079] [ 27.661308] Second to last potentially related work creation: [ 27.662038] kasan_save_stack+0x22/0x50 [ 27.662580] __kasan_record_aux_stack+0x8e/0xa0 [ 27.663195] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.663881] remove_vma+0x139/0x170 [ 27.664361] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.664959] do_vmi_munmap+0x1f1/0x2b0 [ 27.665484] mmap_region+0x1f9/0x2660 [ 27.666007] do_mmap+0x854/0xf00 [ 27.666472] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.666993] ksys_mmap_pgoff+0x3af/0x500 [ 27.667528] do_syscall_64+0x3f/0x90 [ 27.668030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.668721] [ 27.668950] The buggy address belongs to the object at ffff88800ea770e8 [ 27.668950] which belongs to the cache vm_area_struct of size 168 [ 27.670540] The buggy address is located 88 bytes inside of [ 27.670540] freed 168-byte region [ffff88800ea770e8, ffff88800ea77190) [ 27.672039] [ 27.672271] The buggy address belongs to the physical page: [ 27.672974] page:00000000eb715c2d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea77 [ 27.674148] memcg:ffff88800e667101 [ 27.674604] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.675298] page_type: 0xffffffff() [ 27.675777] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 27.676763] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e667101 [ 27.677736] page dumped because: kasan: bad access detected [ 27.678469] [ 27.678694] Memory state around the buggy address: [ 27.679346] ffff88800ea77000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.680243] ffff88800ea77080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 27.681140] >ffff88800ea77100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.682044] ^ [ 27.682714] ffff88800ea77180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 27.683606] ffff88800ea77200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 27.684503] ================================================================== [ 27.685634] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.201543] BUG: Bad rss-counter state mm:00000000a4651ffd type:MM_FILEPAGES val:33 [ 29.202498] BUG: Bad rss-counter state mm:00000000a4651ffd type:MM_ANONPAGES val:22 [ 29.734367] BUG: Bad rss-counter state mm:0000000056210615 type:MM_FILEPAGES val:33 [ 29.735519] BUG: Bad rss-counter state mm:0000000056210615 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15188' (ECDSA) to the list of known hosts. 2023/06/19 18:37:27 fuzzer started 2023/06/19 18:37:27 dialing manager at localhost:44161 2023/06/19 18:37:27 checking machine... 2023/06/19 18:37:27 checking revisions... [ 30.412121] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:37:27 testing simple program... [ 30.455913] cgroup: Unknown subsys name 'net' [ 30.545180] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:37:23 Registers: info registers vcpu 0 RAX=ffffffff8180c585 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09d01 RSI=ffff88806ce09de0 RDI=ffff88806ce09de0 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8613751e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09de8 R15=ffff88806ce09a98 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007fea967c6900 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=00007fea96d7b650 CR3=000000000dd48000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fb5e7965bb0 CR3=0000000009f12000 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=c793469459de9faaae43d30e5c74ac25 XMM02=ec2efd57dc4c00df000000000011cdd0 XMM03=a8b201784eae96ed000000000011cea0 XMM04=8b514e3bd8e46bb300000000000ae988 XMM05=19e9129bd510f23500000000001344a8 XMM06=ef6bcbf32e041a8e0000000000133680 XMM07=e042d86d42eb936e0000000000123b98 XMM08=a8b201784eae96ed000000000011cea0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000