[ 33.820177] BUG: Bad rss-counter state mm:00000000ac4e1afd type:MM_FILEPAGES val:33 [ 33.821474] BUG: Bad rss-counter state mm:00000000ac4e1afd type:MM_ANONPAGES val:22 [ 33.858061] ================================================================== [ 33.859321] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.860559] Read of size 8 at addr ffff8880100d4d08 by task sshd/220 [ 33.861483] [ 33.861741] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.862903] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.864049] Call Trace: [ 33.864427] [ 33.864781] dump_stack_lvl+0x91/0xf0 [ 33.865355] print_report+0xcc/0x620 [ 33.865927] ? __virt_addr_valid+0x102/0x340 [ 33.866581] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.867308] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.868070] kasan_report+0xbe/0xf0 [ 33.868671] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.869422] vma_interval_tree_remove+0xc75/0xec0 [ 33.870019] vma_prepare+0xc54/0x11a0 [ 33.870493] __split_vma+0x5af/0x950 [ 33.870961] ? __pfx___split_vma+0x10/0x10 [ 33.871482] ? find_held_lock+0x2c/0x110 [ 33.871998] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.872559] ? lock_is_held_type+0x9f/0x120 [ 33.873118] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.873730] ? mtree_range_walk+0x632/0x900 [ 33.874274] ? mas_walk+0x5c7/0x7c0 [ 33.874745] do_vmi_munmap+0x1f1/0x2b0 [ 33.875237] mmap_region+0x1f9/0x2660 [ 33.875723] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.876243] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.876955] ? __pfx_lock_acquire+0x10/0x10 [ 33.877482] ? __pfx_mmap_region+0x10/0x10 [ 33.878018] ? security_mmap_addr+0x7d/0xa0 [ 33.878544] ? get_unmapped_area+0x1f5/0x3f0 [ 33.879094] do_mmap+0x854/0xf00 [ 33.879533] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.880030] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.880591] ksys_mmap_pgoff+0x3af/0x500 [ 33.881119] do_syscall_64+0x3f/0x90 [ 33.881592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.882240] RIP: 0033:0x7fc4e38d6d82 [ 33.882700] 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 [ 33.884823] RSP: 002b:00007fff540b9428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.885978] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4e38d6d82 [ 33.886833] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4e2d10000 [ 33.887677] RBP: 00007fc4e2d10000 R08: 0000000000000009 R09: 0000000000001000 [ 33.888550] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c51c31fd90 [ 33.889415] R13: 00007fff540b9440 R14: 00007fff540b9470 R15: 00007fff540b97d0 [ 33.890265] [ 33.890554] [ 33.890771] Allocated by task 213: [ 33.891205] kasan_save_stack+0x22/0x50 [ 33.891709] kasan_set_track+0x25/0x30 [ 33.892204] __kasan_slab_alloc+0x59/0x70 [ 33.892726] kmem_cache_alloc+0x16b/0x370 [ 33.893245] vm_area_dup+0x20/0x160 [ 33.893695] __split_vma+0x170/0x950 [ 33.894155] split_vma+0xc6/0x110 [ 33.894590] mprotect_fixup+0x8d2/0xb30 [ 33.895088] do_mprotect_pkey+0x87e/0xd40 [ 33.895611] __x64_sys_mprotect+0x78/0xc0 [ 33.896130] do_syscall_64+0x3f/0x90 [ 33.896600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.897274] [ 33.897487] Freed by task 213: [ 33.897879] kasan_save_stack+0x22/0x50 [ 33.898378] kasan_set_track+0x25/0x30 [ 33.898873] kasan_save_free_info+0x2b/0x50 [ 33.899402] __kasan_slab_free+0x10a/0x190 [ 33.899935] kmem_cache_free+0x10d/0x4d0 [ 33.900440] rcu_core+0x8c8/0x2860 [ 33.900909] __do_softirq+0x1b7/0x7d4 [ 33.901390] [ 33.901610] Last potentially related work creation: [ 33.902197] kasan_save_stack+0x22/0x50 [ 33.902696] __kasan_record_aux_stack+0x8e/0xa0 [ 33.903318] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.904037] remove_vma+0x139/0x170 [ 33.904488] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.905056] do_vmi_munmap+0x1f1/0x2b0 [ 33.905534] __vm_munmap+0x138/0x3a0 [ 33.906002] __x64_sys_munmap+0x59/0x80 [ 33.906497] do_syscall_64+0x3f/0x90 [ 33.906974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.907618] [ 33.907834] Second to last potentially related work creation: [ 33.908515] kasan_save_stack+0x22/0x50 [ 33.909027] __kasan_record_aux_stack+0x8e/0xa0 [ 33.909602] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.910241] remove_vma+0x139/0x170 [ 33.910692] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.911246] do_vmi_munmap+0x1f1/0x2b0 [ 33.911728] mmap_region+0x1f9/0x2660 [ 33.912203] do_mmap+0x854/0xf00 [ 33.912649] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.913135] ksys_mmap_pgoff+0x3af/0x500 [ 33.913637] do_syscall_64+0x3f/0x90 [ 33.914105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.914739] [ 33.914953] The buggy address belongs to the object at ffff8880100d4cb0 [ 33.914953] which belongs to the cache vm_area_struct of size 168 [ 33.916414] The buggy address is located 88 bytes inside of [ 33.916414] freed 168-byte region [ffff8880100d4cb0, ffff8880100d4d58) [ 33.917833] [ 33.918047] The buggy address belongs to the physical page: [ 33.918707] page:00000000355de78f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100d4 [ 33.919791] memcg:ffff8880095a8c01 [ 33.920212] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.920921] page_type: 0xffffffff() [ 33.921370] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.922283] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095a8c01 [ 33.923181] page dumped because: kasan: bad access detected [ 33.923839] [ 33.924053] Memory state around the buggy address: [ 33.924647] ffff8880100d4c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 33.925498] ffff8880100d4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.926359] >ffff8880100d4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.927206] ^ [ 33.927652] ffff8880100d4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.928509] ffff8880100d4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 33.929371] ================================================================== [ 33.930503] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.947461] BUG: Bad rss-counter state mm:0000000021a85227 type:MM_FILEPAGES val:33 [ 35.948451] BUG: Bad rss-counter state mm:0000000021a85227 type:MM_ANONPAGES val:22 [ 36.525235] BUG: Bad rss-counter state mm:00000000c8bee83d type:MM_FILEPAGES val:33 [ 36.526668] BUG: Bad rss-counter state mm:00000000c8bee83d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64998' (ECDSA) to the list of known hosts. 2023/06/20 03:40:43 fuzzer started 2023/06/20 03:40:43 dialing manager at localhost:44161 2023/06/20 03:40:43 checking machine... 2023/06/20 03:40:43 checking revisions... [ 37.184518] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:40:44 testing simple program... [ 37.235009] cgroup: Unknown subsys name 'net' [ 37.321550] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:40:40 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=00007fc410ac32b0 CR3=000000000e26c000 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=2033343a30343a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a30343a3330203032 XMM08=3a755f6d65747379733d6a6275732035 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=dffffc0000000000 RCX=ffffffff8173f3e4 RDX=ffff888015c2b680 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800dce5ae0 RSP=ffff888018dafc00 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=000000000000014a R15=00007f2a65e35000 RIP=ffffffff814c07eb 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 00007f2a65e80900 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=000056516faf6b88 CR3=0000000018c5e000 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