syzkaller login: [ 33.829315] BUG: Bad rss-counter state mm:000000006a45a4a8 type:MM_FILEPAGES val:33 [ 33.830535] BUG: Bad rss-counter state mm:000000006a45a4a8 type:MM_ANONPAGES val:22 [ 33.975938] ================================================================== [ 33.976834] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.977768] Read of size 8 at addr ffff88800e08a6b0 by task sshd/220 [ 33.978546] [ 33.978860] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.979721] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.980734] Call Trace: [ 33.981061] [ 33.981346] dump_stack_lvl+0x91/0xf0 [ 33.981839] print_report+0xcc/0x620 [ 33.982330] ? __virt_addr_valid+0x102/0x340 [ 33.982912] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.983524] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.984142] kasan_report+0xbe/0xf0 [ 33.984621] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.985249] vma_interval_tree_remove+0xc75/0xec0 [ 33.985849] vma_prepare+0xc54/0x11a0 [ 33.986331] __split_vma+0x5af/0x950 [ 33.986814] ? __pfx___split_vma+0x10/0x10 [ 33.987339] ? find_held_lock+0x2c/0x110 [ 33.987855] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.988422] ? lock_is_held_type+0x9f/0x120 [ 33.988954] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.989561] ? mtree_range_walk+0x632/0x900 [ 33.990115] ? mas_walk+0x5c7/0x7c0 [ 33.990607] do_vmi_munmap+0x1f1/0x2b0 [ 33.991090] mmap_region+0x1f9/0x2660 [ 33.991575] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.992085] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.992813] ? __pfx_lock_acquire+0x10/0x10 [ 33.993342] ? __pfx_mmap_region+0x10/0x10 [ 33.993875] ? security_mmap_addr+0x7d/0xa0 [ 33.994408] ? get_unmapped_area+0x1f5/0x3f0 [ 33.994974] do_mmap+0x854/0xf00 [ 33.995415] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.995916] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.996477] ksys_mmap_pgoff+0x3af/0x500 [ 33.996992] do_syscall_64+0x3f/0x90 [ 33.997475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.998112] RIP: 0033:0x7f8549f42d82 [ 33.998578] 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 [ 34.000703] RSP: 002b:00007ffdd9926568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.001602] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8549f42d82 [ 34.002448] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f854937c000 [ 34.003299] RBP: 00007f854937c000 R08: 0000000000000009 R09: 0000000000001000 [ 34.004159] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a11abaf70 [ 34.005012] R13: 00007ffdd9926580 R14: 00007ffdd99265b0 R15: 00007ffdd9926910 [ 34.005863] [ 34.006159] [ 34.006376] Allocated by task 212: [ 34.006823] kasan_save_stack+0x22/0x50 [ 34.007333] kasan_set_track+0x25/0x30 [ 34.007826] __kasan_slab_alloc+0x59/0x70 [ 34.008350] kmem_cache_alloc+0x16b/0x370 [ 34.008871] vm_area_dup+0x20/0x160 [ 34.009333] __split_vma+0x170/0x950 [ 34.009805] split_vma+0xc6/0x110 [ 34.010240] mprotect_fixup+0x8d2/0xb30 [ 34.010750] do_mprotect_pkey+0x87e/0xd40 [ 34.011273] __x64_sys_mprotect+0x78/0xc0 [ 34.011794] do_syscall_64+0x3f/0x90 [ 34.012267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.012902] [ 34.013119] Freed by task 212: [ 34.013513] kasan_save_stack+0x22/0x50 [ 34.014017] kasan_set_track+0x25/0x30 [ 34.014530] kasan_save_free_info+0x2b/0x50 [ 34.015069] __kasan_slab_free+0x10a/0x190 [ 34.015608] kmem_cache_free+0x10d/0x4d0 [ 34.016120] rcu_core+0x8c8/0x2860 [ 34.016569] __do_softirq+0x1b7/0x7d4 [ 34.017047] [ 34.017260] Last potentially related work creation: [ 34.017843] kasan_save_stack+0x22/0x50 [ 34.018343] __kasan_record_aux_stack+0x8e/0xa0 [ 34.018938] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.019579] remove_vma+0x139/0x170 [ 34.020029] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.020586] do_vmi_munmap+0x1f1/0x2b0 [ 34.021071] __vm_munmap+0x138/0x3a0 [ 34.021539] __x64_sys_munmap+0x59/0x80 [ 34.022034] do_syscall_64+0x3f/0x90 [ 34.022516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.023149] [ 34.023366] The buggy address belongs to the object at ffff88800e08a658 [ 34.023366] which belongs to the cache vm_area_struct of size 168 [ 34.024822] The buggy address is located 88 bytes inside of [ 34.024822] freed 168-byte region [ffff88800e08a658, ffff88800e08a700) [ 34.026203] [ 34.026422] The buggy address belongs to the physical page: [ 34.027092] page:0000000053413c76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe08a [ 34.028190] memcg:ffff888016a21f01 [ 34.028665] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.029304] page_type: 0xffffffff() [ 34.029755] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.030681] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a21f01 [ 34.031575] page dumped because: kasan: bad access detected [ 34.032234] [ 34.032450] Memory state around the buggy address: [ 34.033027] ffff88800e08a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.033878] ffff88800e08a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.034791] >ffff88800e08a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.035636] ^ [ 34.036219] ffff88800e08a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.037072] ffff88800e08a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.037915] ================================================================== [ 34.039021] Disabling lock debugging due to kernel taint [ 35.880412] BUG: Bad rss-counter state mm:0000000006fc11c4 type:MM_FILEPAGES val:33 [ 35.881563] BUG: Bad rss-counter state mm:0000000006fc11c4 type:MM_ANONPAGES val:22 [ 36.334884] BUG: Bad rss-counter state mm:0000000037894b1c type:MM_FILEPAGES val:33 [ 36.335903] BUG: Bad rss-counter state mm:0000000037894b1c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55751' (ECDSA) to the list of known hosts. 2023/06/20 05:38:16 fuzzer started 2023/06/20 05:38:16 dialing manager at localhost:44161 2023/06/20 05:38:16 checking machine... 2023/06/20 05:38:16 checking revisions... [ 37.054418] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:38:16 testing simple program... [ 37.108091] cgroup: Unknown subsys name 'net' [ 37.164102] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:38:13 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff8613753e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880145ff6f0 RSP=ffff8880145ff628 R8 =ffffffff86137542 R9 =ffff8880145ff6d8 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880145ff6f8 R13=ffff8880145ff6e0 R14=ffff8880145ff9f8 R15=ffff8880145ff698 RIP=ffffffff81130bc1 RFL=00000282 [--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 00007f671a3f1900 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=000055e8b01ab768 CR3=000000000d668000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b331bf5017b1af2100000000000ae988 XMM05=848f331ff6d2576e0000000000134d58 XMM06=19e9129bd510f2350000000000133ea0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000386 RBX=000000000000ba0b RCX=1ffff11001e336fe RDX=1ffff11001e336ff RSI=00000000000ed400 RDI=ffff88800f19b7f8 RBP=ffff88806cf09cb0 RSP=ffff88806cf09c20 R8 =0000000000000001 R9 =00000000000003d7 R10=0000000000000001 R11=00000000fa83b2da R12=ffff88800f19b700 R13=00000000000003b5 R14=00000000000ed400 R15=000000000000ba0b RIP=ffffffff8129381c 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 00007f62aa36f900 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=00007f62aa9270b0 CR3=000000000eb62000 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=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