syzkaller login: [ 37.950558] BUG: Bad rss-counter state mm:000000004536c4c3 type:MM_FILEPAGES val:33 [ 37.951499] BUG: Bad rss-counter state mm:000000004536c4c3 type:MM_ANONPAGES val:22 [ 38.117742] ================================================================== [ 38.118645] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.119526] Read of size 8 at addr ffff88800df3d798 by task sshd/221 [ 38.120246] [ 38.120452] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.121444] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.122346] Call Trace: [ 38.122644] [ 38.122936] dump_stack_lvl+0x91/0xf0 [ 38.123394] print_report+0xcc/0x620 [ 38.123848] ? __virt_addr_valid+0x102/0x340 [ 38.124367] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.124944] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.125590] kasan_report+0xbe/0xf0 [ 38.126060] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.126684] vma_interval_tree_remove+0xc75/0xec0 [ 38.127296] vma_prepare+0xc54/0x11a0 [ 38.127797] __split_vma+0x5af/0x950 [ 38.128291] ? __pfx___split_vma+0x10/0x10 [ 38.128832] ? find_held_lock+0x2c/0x110 [ 38.129380] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.129916] ? lock_is_held_type+0x9f/0x120 [ 38.130458] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.131110] ? mtree_range_walk+0x632/0x900 [ 38.131687] ? mas_walk+0x5c7/0x7c0 [ 38.132160] do_vmi_munmap+0x1f1/0x2b0 [ 38.132625] mmap_region+0x1f9/0x2660 [ 38.133127] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.133678] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.134424] ? __pfx_lock_acquire+0x10/0x10 [ 38.134924] ? __pfx_mmap_region+0x10/0x10 [ 38.135468] ? security_mmap_addr+0x7d/0xa0 [ 38.136022] ? get_unmapped_area+0x1f5/0x3f0 [ 38.136583] do_mmap+0x854/0xf00 [ 38.137021] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.137534] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.138112] ksys_mmap_pgoff+0x3af/0x500 [ 38.138625] do_syscall_64+0x3f/0x90 [ 38.139122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.139795] RIP: 0033:0x7f0b4e0b9d82 [ 38.140254] 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 [ 38.142390] RSP: 002b:00007ffc03fb8e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.143293] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b4e0b9d82 [ 38.144142] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b4d4f3000 [ 38.144985] RBP: 00007f0b4d4f3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.145856] R10: 0000000000000812 R11: 0000000000000206 R12: 00005577d6392ec0 [ 38.146705] R13: 00007ffc03fb8eb0 R14: 00007ffc03fb8ee0 R15: 00007ffc03fb9240 [ 38.147552] [ 38.147840] [ 38.148052] Allocated by task 214: [ 38.148480] kasan_save_stack+0x22/0x50 [ 38.148997] kasan_set_track+0x25/0x30 [ 38.149488] __kasan_slab_alloc+0x59/0x70 [ 38.150013] kmem_cache_alloc+0x16b/0x370 [ 38.150547] vm_area_dup+0x20/0x160 [ 38.151000] __split_vma+0x170/0x950 [ 38.151485] split_vma+0xc6/0x110 [ 38.151933] mprotect_fixup+0x8d2/0xb30 [ 38.152436] do_mprotect_pkey+0x87e/0xd40 [ 38.152961] __x64_sys_mprotect+0x78/0xc0 [ 38.153521] do_syscall_64+0x3f/0x90 [ 38.154012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.154682] [ 38.154895] Freed by task 204: [ 38.155309] kasan_save_stack+0x22/0x50 [ 38.155824] kasan_set_track+0x25/0x30 [ 38.156318] kasan_save_free_info+0x2b/0x50 [ 38.156852] __kasan_slab_free+0x10a/0x190 [ 38.157395] kmem_cache_free+0x10d/0x4d0 [ 38.157909] rcu_core+0x8c8/0x2860 [ 38.158354] __do_softirq+0x1b7/0x7d4 [ 38.158839] [ 38.159053] Last potentially related work creation: [ 38.159653] kasan_save_stack+0x22/0x50 [ 38.160164] __kasan_record_aux_stack+0x8e/0xa0 [ 38.160740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.161407] remove_vma+0x139/0x170 [ 38.161884] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.162455] do_vmi_munmap+0x1f1/0x2b0 [ 38.162945] __vm_munmap+0x138/0x3a0 [ 38.163420] __x64_sys_munmap+0x59/0x80 [ 38.163923] do_syscall_64+0x3f/0x90 [ 38.164435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.165094] [ 38.165327] The buggy address belongs to the object at ffff88800df3d740 [ 38.165327] which belongs to the cache vm_area_struct of size 168 [ 38.166808] The buggy address is located 88 bytes inside of [ 38.166808] freed 168-byte region [ffff88800df3d740, ffff88800df3d7e8) [ 38.168241] [ 38.168467] The buggy address belongs to the physical page: [ 38.169132] page:000000003c910401 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf3d [ 38.170269] memcg:ffff88801674a201 [ 38.170710] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.171404] page_type: 0xffffffff() [ 38.171867] raw: 0100000000000200 ffff88800879fc80 ffffea0000593b40 0000000000000009 [ 38.172811] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801674a201 [ 38.173745] page dumped because: kasan: bad access detected [ 38.174406] [ 38.174624] Memory state around the buggy address: [ 38.175221] ffff88800df3d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.176079] ffff88800df3d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.176945] >ffff88800df3d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.177816] ^ [ 38.178313] ffff88800df3d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.179216] ffff88800df3d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.180111] ================================================================== [ 38.181507] Disabling lock debugging due to kernel taint [ 40.472911] BUG: Bad rss-counter state mm:00000000fc50804c type:MM_FILEPAGES val:33 [ 40.473859] BUG: Bad rss-counter state mm:00000000fc50804c type:MM_ANONPAGES val:22 [ 41.004212] BUG: Bad rss-counter state mm:0000000025f88bba type:MM_FILEPAGES val:33 [ 41.005231] BUG: Bad rss-counter state mm:0000000025f88bba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2445' (ECDSA) to the list of known hosts. 2023/06/19 13:56:07 fuzzer started 2023/06/19 13:56:07 dialing manager at localhost:44161 2023/06/19 13:56:07 checking machine... 2023/06/19 13:56:07 checking revisions... [ 41.721822] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:56:07 testing simple program... [ 41.770082] cgroup: Unknown subsys name 'net' [ 41.822788] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:56:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880146f06c0 RCX=dffffc0000000000 RDX=00000000000f4240 RSI=0000000000000000 RDI=ffff8880102e3680 RBP=ffff8880102e3680 RSP=ffff8880146d7cf0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000003 R11=000000172262c2b8 R12=00000000000f4240 R13=0000000000000000 R14=ffff8880146d7f58 R15=dffffc0000000000 RIP=ffffffff81298ad0 RFL=00000006 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2ac174f900 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=00007f2ac0b4f8c0 CR3=000000000c9cc000 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=7e8a42789393c4b7000000000011d478 XMM01=acb1535c325cd9ab614db3e037164aa1 XMM02=2c67c8bc2e329bc3000000000011d750 XMM03=fb795ef6d65770560000000000124938 XMM04=9a2c55746c70b85700000000000ae988 XMM05=28411661adb0fb5e0000000000135318 XMM06=db20f175d54767f000000000001343b8 XMM07=e042d86d42eb936e0000000000124bb8 XMM08=8533f9908d77721f000000000011d7b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800e69aa20 RBX=ffff88800dcd6a00 RCX=0000000000000009 RDX=0000000000000600 RSI=ffff88800e69aa00 RDI=ffff8880087b6780 RBP=ffff888008e57d18 RSP=ffff888008e57cf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=ffff8880087b6780 R13=ffffea0000373580 R14=ffffffff8186b9c5 R15=ffff8880168d1100 RIP=ffffffff81809c73 RFL=00000212 [----A--] 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=00007ffc99bd2000 CR3=000000000dce8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000