syzkaller login: [ 30.645269] BUG: Bad rss-counter state mm:000000005e789434 type:MM_FILEPAGES val:33 [ 30.646498] BUG: Bad rss-counter state mm:000000005e789434 type:MM_ANONPAGES val:22 [ 30.815485] ================================================================== [ 30.816408] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.817331] Read of size 8 at addr ffff88800ca76c20 by task sshd/219 [ 30.818089] [ 30.818421] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.819276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.820260] Call Trace: [ 30.820593] <TASK> [ 30.820875] dump_stack_lvl+0x91/0xf0 [ 30.821362] print_report+0xcc/0x620 [ 30.821841] ? __virt_addr_valid+0x102/0x340 [ 30.822387] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.823011] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.823625] kasan_report+0xbe/0xf0 [ 30.824108] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.824746] vma_interval_tree_remove+0xc75/0xec0 [ 30.825351] vma_prepare+0xc54/0x11a0 [ 30.825831] __split_vma+0x5af/0x950 [ 30.826313] ? __pfx___split_vma+0x10/0x10 [ 30.826962] ? find_held_lock+0x2c/0x110 [ 30.827497] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.828064] ? lock_is_held_type+0x9f/0x120 [ 30.828625] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.829225] ? mtree_range_walk+0x632/0x900 [ 30.829778] ? mas_walk+0x5c7/0x7c0 [ 30.830248] do_vmi_munmap+0x1f1/0x2b0 [ 30.830742] mmap_region+0x1f9/0x2660 [ 30.831231] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.831746] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.832475] ? __pfx_lock_acquire+0x10/0x10 [ 30.833015] ? __pfx_mmap_region+0x10/0x10 [ 30.833542] ? security_mmap_addr+0x7d/0xa0 [ 30.834067] ? get_unmapped_area+0x1f5/0x3f0 [ 30.834613] do_mmap+0x854/0xf00 [ 30.835048] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.835540] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.836108] ksys_mmap_pgoff+0x3af/0x500 [ 30.836614] do_syscall_64+0x3f/0x90 [ 30.837092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.837738] RIP: 0033:0x7f6f2cdd4d82 [ 30.838192] 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 [ 30.840338] RSP: 002b:00007ffd6a17e708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.841229] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f2cdd4d82 [ 30.842067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f2c20e000 [ 30.842909] RBP: 00007f6f2c20e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.843755] R10: 0000000000000812 R11: 0000000000000206 R12: 000055becf5f2d90 [ 30.844597] R13: 00007ffd6a17e720 R14: 00007ffd6a17e750 R15: 00007ffd6a17eab0 [ 30.845448] </TASK> [ 30.845745] [ 30.845961] Allocated by task 212: [ 30.846390] kasan_save_stack+0x22/0x50 [ 30.846895] kasan_set_track+0x25/0x30 [ 30.847392] __kasan_slab_alloc+0x59/0x70 [ 30.847920] kmem_cache_alloc+0x16b/0x370 [ 30.848450] vm_area_dup+0x20/0x160 [ 30.848939] __split_vma+0x170/0x950 [ 30.849411] split_vma+0xc6/0x110 [ 30.849848] mprotect_fixup+0x8d2/0xb30 [ 30.850354] do_mprotect_pkey+0x87e/0xd40 [ 30.850878] __x64_sys_mprotect+0x78/0xc0 [ 30.851405] do_syscall_64+0x3f/0x90 [ 30.851881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.852541] [ 30.852759] Freed by task 199: [ 30.853153] kasan_save_stack+0x22/0x50 [ 30.853658] kasan_set_track+0x25/0x30 [ 30.854157] kasan_save_free_info+0x2b/0x50 [ 30.854687] __kasan_slab_free+0x10a/0x190 [ 30.855223] kmem_cache_free+0x10d/0x4d0 [ 30.855729] rcu_core+0x8c8/0x2860 [ 30.856172] __do_softirq+0x1b7/0x7d4 [ 30.856660] [ 30.856876] Last potentially related work creation: [ 30.857485] kasan_save_stack+0x22/0x50 [ 30.857993] __kasan_record_aux_stack+0x8e/0xa0 [ 30.858563] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.859215] remove_vma+0x139/0x170 [ 30.859663] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.860224] do_vmi_munmap+0x1f1/0x2b0 [ 30.860731] __vm_munmap+0x138/0x3a0 [ 30.861227] __x64_sys_munmap+0x59/0x80 [ 30.861720] do_syscall_64+0x3f/0x90 [ 30.862200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862838] [ 30.863064] The buggy address belongs to the object at ffff88800ca76bc8 [ 30.863064] which belongs to the cache vm_area_struct of size 168 [ 30.864535] The buggy address is located 88 bytes inside of [ 30.864535] freed 168-byte region [ffff88800ca76bc8, ffff88800ca76c70) [ 30.865949] [ 30.866167] The buggy address belongs to the physical page: [ 30.866816] page:00000000d004369d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca76 [ 30.867885] memcg:ffff88800e22f701 [ 30.868329] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.868970] page_type: 0xffffffff() [ 30.869418] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.870340] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e22f701 [ 30.871244] page dumped because: kasan: bad access detected [ 30.871896] [ 30.872113] Memory state around the buggy address: [ 30.872712] ffff88800ca76b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.873595] ffff88800ca76b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.874476] >ffff88800ca76c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.875317] ^ [ 30.875839] ffff88800ca76c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.876695] ffff88800ca76d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.877540] ================================================================== [ 30.878490] Disabling lock debugging due to kernel taint [ 33.016369] BUG: Bad rss-counter state mm:000000000487b3f3 type:MM_FILEPAGES val:33 [ 33.017409] BUG: Bad rss-counter state mm:000000000487b3f3 type:MM_ANONPAGES val:22 [ 33.572480] BUG: Bad rss-counter state mm:00000000efff8a0d type:MM_FILEPAGES val:33 [ 33.573637] BUG: Bad rss-counter state mm:00000000efff8a0d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16681' (ECDSA) to the list of known hosts. 2023/06/21 05:36:09 fuzzer started 2023/06/21 05:36:10 dialing manager at localhost:36067 2023/06/21 05:36:10 checking machine... 2023/06/21 05:36:10 checking revisions... [ 34.222578] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:36:10 testing simple program... [ 34.263544] cgroup: Unknown subsys name 'net' [ 34.311268] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:36:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801679ff40 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffff88801679ff30 RDI=ffff88806ce09aa8 RBP=ffff888016798000 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b53d8 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88801679ff30 R15=ffff88806ce09a98 RIP=ffffffff81131cac 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 00007ffaa3db2900 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=00007ffaa4369618 CR3=000000000eb36000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f6b42c08060 CR3=000000000c782000 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=9380ca72dfa6dc982048df133f53d301 XMM02=ec2efd57dc4c00df0000000000119c20 XMM03=05ace4c3bdd448d50000000000119cf0 XMM04=d2e2fc41916b6c2f00000000000ae988 XMM05=dfcdbad4f1609c370000000000131e38 XMM06=14340a0dfba84d9c0000000000130ca0 XMM07=e042d86d42eb936e0000000000121f88 XMM08=05ace4c3bdd448d50000000000119cf0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000