[ 30.640727] BUG: Bad rss-counter state mm:0000000051f0817e type:MM_FILEPAGES val:33 [ 30.641382] BUG: Bad rss-counter state mm:0000000051f0817e type:MM_ANONPAGES val:22 [ 30.829816] ================================================================== [ 30.831188] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.840660] Read of size 8 at addr ffff88800ea17c20 by task sshd/221 [ 30.841972] [ 30.842296] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.843761] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.845490] Call Trace: [ 30.846026] <TASK> [ 30.846535] dump_stack_lvl+0x91/0xf0 [ 30.847360] print_report+0xcc/0x620 [ 30.852410] ? __virt_addr_valid+0x102/0x340 [ 30.853502] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854769] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.856004] kasan_report+0xbe/0xf0 [ 30.856950] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.858202] vma_interval_tree_remove+0xc75/0xec0 [ 30.859330] vma_prepare+0xc54/0x11a0 [ 30.860264] __split_vma+0x5af/0x950 [ 30.861223] ? __pfx___split_vma+0x10/0x10 [ 30.862277] ? find_held_lock+0x2c/0x110 [ 30.863315] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.864459] ? lock_is_held_type+0x9f/0x120 [ 30.865553] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.866727] ? mtree_range_walk+0x632/0x900 [ 30.867812] ? mas_walk+0x5c7/0x7c0 [ 30.868730] do_vmi_munmap+0x1f1/0x2b0 [ 30.869723] mmap_region+0x1f9/0x2660 [ 30.870680] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.871712] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.873149] ? __pfx_lock_acquire+0x10/0x10 [ 30.874223] ? __pfx_mmap_region+0x10/0x10 [ 30.875296] ? security_mmap_addr+0x7d/0xa0 [ 30.876368] ? get_unmapped_area+0x1f5/0x3f0 [ 30.877470] do_mmap+0x854/0xf00 [ 30.878327] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.879276] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.880445] ksys_mmap_pgoff+0x3af/0x500 [ 30.881418] do_syscall_64+0x3f/0x90 [ 30.882378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.883683] RIP: 0033:0x7f849e80ad82 [ 30.884605] 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 [ 30.889176] RSP: 002b:00007ffe6659b9c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.891121] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f849e80ad82 [ 30.892984] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f849dc44000 [ 30.894844] RBP: 00007f849dc44000 R08: 0000000000000009 R09: 0000000000001000 [ 30.896519] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed6df94ec0 [ 30.897976] R13: 00007ffe6659b9e0 R14: 00007ffe6659ba10 R15: 00007ffe6659bd70 [ 30.899699] </TASK> [ 30.900217] [ 30.900635] Allocated by task 212: [ 30.901430] kasan_save_stack+0x22/0x50 [ 30.902364] kasan_set_track+0x25/0x30 [ 30.903305] __kasan_slab_alloc+0x59/0x70 [ 30.904357] kmem_cache_alloc+0x16b/0x370 [ 30.905290] vm_area_dup+0x20/0x160 [ 30.906166] __split_vma+0x170/0x950 [ 30.907011] split_vma+0xc6/0x110 [ 30.907822] mprotect_fixup+0x8d2/0xb30 [ 30.908771] do_mprotect_pkey+0x87e/0xd40 [ 30.909776] __x64_sys_mprotect+0x78/0xc0 [ 30.910790] do_syscall_64+0x3f/0x90 [ 30.911713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.912961] [ 30.913328] Freed by task 13: [ 30.914063] kasan_save_stack+0x22/0x50 [ 30.914984] kasan_set_track+0x25/0x30 [ 30.915937] kasan_save_free_info+0x2b/0x50 [ 30.916951] __kasan_slab_free+0x10a/0x190 [ 30.917924] kmem_cache_free+0x10d/0x4d0 [ 30.918906] rcu_core+0x8c8/0x2860 [ 30.919752] __do_softirq+0x1b7/0x7d4 [ 30.920596] [ 30.920946] Last potentially related work creation: [ 30.921978] kasan_save_stack+0x22/0x50 [ 30.922942] __kasan_record_aux_stack+0x8e/0xa0 [ 30.924047] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.925141] remove_vma+0x139/0x170 [ 30.925871] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.926902] do_vmi_munmap+0x1f1/0x2b0 [ 30.927800] __vm_munmap+0x138/0x3a0 [ 30.928733] __x64_sys_munmap+0x59/0x80 [ 30.929696] do_syscall_64+0x3f/0x90 [ 30.930599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.931875] [ 30.932231] The buggy address belongs to the object at ffff88800ea17bc8 [ 30.932231] which belongs to the cache vm_area_struct of size 168 [ 30.935218] The buggy address is located 88 bytes inside of [ 30.935218] freed 168-byte region [ffff88800ea17bc8, ffff88800ea17c70) [ 30.938162] [ 30.938588] The buggy address belongs to the physical page: [ 30.939964] page:00000000bb0e95f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea17 [ 30.942012] memcg:ffff88800df5a201 [ 30.942765] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.943886] page_type: 0xffffffff() [ 30.944600] raw: 0100000000000200 ffff8880087a0c80 ffffea0000363080 dead000000000008 [ 30.946166] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df5a201 [ 30.947688] page dumped because: kasan: bad access detected [ 30.948764] [ 30.949085] Memory state around the buggy address: [ 30.950014] ffff88800ea17b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.951559] ffff88800ea17b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.953219] >ffff88800ea17c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.954887] ^ [ 30.955914] ffff88800ea17c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.957610] ffff88800ea17d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.959327] ================================================================== [ 30.961278] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.715660] BUG: Bad rss-counter state mm:000000008d121307 type:MM_FILEPAGES val:33 [ 34.716297] BUG: Bad rss-counter state mm:000000008d121307 type:MM_ANONPAGES val:22 [ 35.409895] BUG: Bad rss-counter state mm:00000000a86b16d4 type:MM_FILEPAGES val:33 [ 35.410564] BUG: Bad rss-counter state mm:00000000a86b16d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55574' (ECDSA) to the list of known hosts. 2023/06/21 10:24:00 fuzzer started 2023/06/21 10:24:01 dialing manager at localhost:36067 2023/06/21 10:24:01 checking machine... 2023/06/21 10:24:01 checking revisions... [ 36.315552] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:24:01 testing simple program... [ 36.360223] cgroup: Unknown subsys name 'net' [ 36.403065] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:24:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016b5f5b8 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806ce3de20 RBP=0000000000000001 RSP=ffff888016b5f5a8 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=ffff88800ce9f000 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce3de20 R15=0000000000000000 RIP=ffffffff812d8e97 RFL=00000082 [--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 00007f8b6b62f900 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=00007f8b6b62f6f8 CR3=000000000f178000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=ffffed10018d9181 RSI=0000000000000004 RDI=ffff88800c6c8c00 RBP=ffff88800c6c8c00 RSP=ffff888016aaf7a8 R8 =0000000000000000 R9 =ffffed10018d9180 R10=ffff88800c6c8c03 R11=0000000000000000 R12=0000000000000003 R13=ffffed10018d9180 R14=0000000000000001 R15=1ffff11002d55ef6 RIP=ffffffff845368c8 RFL=00000002 [-------] 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=00007f8ddb10c590 CR3=000000000c58c000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=a019ffdd3aa58b840000000000133068 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=af1f71bf41bff7c300000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000