[ 24.197095] BUG: Bad rss-counter state mm:00000000cac76cad type:MM_FILEPAGES val:33 [ 24.197833] BUG: Bad rss-counter state mm:00000000cac76cad type:MM_ANONPAGES val:22 [ 24.313325] ================================================================== [ 24.314651] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.316080] Read of size 8 at addr ffff88801afe4df0 by task sshd/219 [ 24.317268] [ 24.317593] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.318944] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.320251] Call Trace: [ 24.320663] [ 24.321070] dump_stack_lvl+0x91/0xf0 [ 24.321712] print_report+0xcc/0x620 [ 24.322327] ? __virt_addr_valid+0x102/0x340 [ 24.323029] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.323814] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.324584] kasan_report+0xbe/0xf0 [ 24.325153] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.325984] vma_interval_tree_remove+0xc75/0xec0 [ 24.326790] vma_prepare+0xc54/0x11a0 [ 24.327416] __split_vma+0x5af/0x950 [ 24.328077] ? __pfx___split_vma+0x10/0x10 [ 24.328746] ? find_held_lock+0x2c/0x110 [ 24.329437] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.330204] ? lock_is_held_type+0x9f/0x120 [ 24.330922] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.331714] ? mtree_range_walk+0x632/0x900 [ 24.332465] ? mas_walk+0x5c7/0x7c0 [ 24.333101] do_vmi_munmap+0x1f1/0x2b0 [ 24.333731] mmap_region+0x1f9/0x2660 [ 24.334271] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.334939] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.335922] ? __pfx_lock_acquire+0x10/0x10 [ 24.336618] ? __pfx_mmap_region+0x10/0x10 [ 24.337311] ? security_mmap_addr+0x7d/0xa0 [ 24.338007] ? get_unmapped_area+0x1f5/0x3f0 [ 24.338709] do_mmap+0x854/0xf00 [ 24.339266] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.339910] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.340567] ksys_mmap_pgoff+0x3af/0x500 [ 24.341206] do_syscall_64+0x3f/0x90 [ 24.341779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.342579] RIP: 0033:0x7fd69f60fd82 [ 24.343124] 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 [ 24.345376] RSP: 002b:00007ffea5199818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.346329] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd69f60fd82 [ 24.347214] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd69ea49000 [ 24.348108] RBP: 00007fd69ea49000 R08: 0000000000000009 R09: 0000000000001000 [ 24.349002] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562be25b1ec0 [ 24.349894] R13: 00007ffea5199830 R14: 00007ffea5199860 R15: 00007ffea5199bc0 [ 24.350787] [ 24.351097] [ 24.351324] Allocated by task 206: [ 24.351774] kasan_save_stack+0x22/0x50 [ 24.352320] kasan_set_track+0x25/0x30 [ 24.352843] __kasan_slab_alloc+0x59/0x70 [ 24.353399] kmem_cache_alloc+0x16b/0x370 [ 24.353939] vm_area_dup+0x20/0x160 [ 24.354414] __split_vma+0x170/0x950 [ 24.354906] split_vma+0xc6/0x110 [ 24.355366] mprotect_fixup+0x8d2/0xb30 [ 24.355906] do_mprotect_pkey+0x87e/0xd40 [ 24.356436] __x64_sys_mprotect+0x78/0xc0 [ 24.356955] do_syscall_64+0x3f/0x90 [ 24.357436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.358084] [ 24.358302] Freed by task 203: [ 24.358699] kasan_save_stack+0x22/0x50 [ 24.359202] kasan_set_track+0x25/0x30 [ 24.359694] kasan_save_free_info+0x2b/0x50 [ 24.360245] __kasan_slab_free+0x10a/0x190 [ 24.360773] kmem_cache_free+0x10d/0x4d0 [ 24.361283] rcu_core+0x8c8/0x2860 [ 24.361707] __do_softirq+0x1b7/0x7d4 [ 24.362164] [ 24.362368] Last potentially related work creation: [ 24.362925] kasan_save_stack+0x22/0x50 [ 24.363404] __kasan_record_aux_stack+0x8e/0xa0 [ 24.363961] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.364574] remove_vma+0x139/0x170 [ 24.365001] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.365526] do_vmi_munmap+0x1f1/0x2b0 [ 24.366008] __vm_munmap+0x138/0x3a0 [ 24.366483] __x64_sys_munmap+0x59/0x80 [ 24.366977] do_syscall_64+0x3f/0x90 [ 24.367443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.368113] [ 24.368327] The buggy address belongs to the object at ffff88801afe4d98 [ 24.368327] which belongs to the cache vm_area_struct of size 168 [ 24.369807] The buggy address is located 88 bytes inside of [ 24.369807] freed 168-byte region [ffff88801afe4d98, ffff88801afe4e40) [ 24.371219] [ 24.371431] The buggy address belongs to the physical page: [ 24.372121] page:000000009e601f0c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1afe4 [ 24.373229] memcg:ffff88801afadc01 [ 24.373655] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.374305] page_type: 0xffffffff() [ 24.374761] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.375690] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801afadc01 [ 24.376639] page dumped because: kasan: bad access detected [ 24.377305] [ 24.377521] Memory state around the buggy address: [ 24.378107] ffff88801afe4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.378958] ffff88801afe4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.379814] >ffff88801afe4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.380667] ^ [ 24.381475] ffff88801afe4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.382336] ffff88801afe4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.383193] ================================================================== [ 24.384367] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.171779] BUG: Bad rss-counter state mm:0000000004caaaab type:MM_FILEPAGES val:33 [ 26.172995] BUG: Bad rss-counter state mm:0000000004caaaab type:MM_ANONPAGES val:22 [ 26.687150] BUG: Bad rss-counter state mm:00000000ec78b5cb type:MM_FILEPAGES val:33 [ 26.688591] BUG: Bad rss-counter state mm:00000000ec78b5cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9738' (ECDSA) to the list of known hosts. 2023/06/20 19:22:07 fuzzer started 2023/06/20 19:22:07 dialing manager at localhost:36067 2023/06/20 19:22:07 checking machine... 2023/06/20 19:22:07 checking revisions... [ 27.411587] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:22:07 testing simple program... [ 27.455360] cgroup: Unknown subsys name 'net' [ 27.493959] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:22:06 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=00007ffdeda8f438 CR3=000000000ee9c000 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=2036303a32323a3931203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a32323a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f4398006e20 RBX=0000000000000000 RCX=0000000000000280 RDX=0000000000000094 RSI=0000000000021000 RDI=0000000000000209 RBP=0000000000001fb0 RSP=00007f439fcb9620 R8 =0000000000000000 R9 =00007f4398000080 R10=00007f43980070a0 R11=0000000000000000 R12=00007f4398000020 R13=00007f43980008d0 R14=fffffffffffffee0 R15=00007f439fd90840 RIP=00007f43a00d69e7 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f439fcbd700 00000000 00000000 GS =0000 0000000000000000 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=00007f37a6d6c2f0 CR3=000000000ee9c000 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=32323a3931203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732036303a3232 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323138 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000