syzkaller login: [ 60.919560] BUG: Bad rss-counter state mm:000000009d1556cd type:MM_FILEPAGES val:33 [ 60.920602] BUG: Bad rss-counter state mm:000000009d1556cd type:MM_ANONPAGES val:22 [ 61.008392] ================================================================== [ 61.009498] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.010604] Read of size 8 at addr ffff88800fe11c20 by task sshd/219 [ 61.011618] [ 61.011855] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.012739] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.013732] Call Trace: [ 61.014056] [ 61.014358] dump_stack_lvl+0x91/0xf0 [ 61.014859] print_report+0xcc/0x620 [ 61.015349] ? __virt_addr_valid+0x102/0x340 [ 61.015898] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.016536] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.017156] kasan_report+0xbe/0xf0 [ 61.017634] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.018255] vma_interval_tree_remove+0xc75/0xec0 [ 61.018867] vma_prepare+0xc54/0x11a0 [ 61.019355] __split_vma+0x5af/0x950 [ 61.019832] ? __pfx___split_vma+0x10/0x10 [ 61.020389] ? find_held_lock+0x2c/0x110 [ 61.020916] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.021485] ? lock_is_held_type+0x9f/0x120 [ 61.022032] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.022651] ? mtree_range_walk+0x632/0x900 [ 61.023203] ? mas_walk+0x5c7/0x7c0 [ 61.023683] do_vmi_munmap+0x1f1/0x2b0 [ 61.024212] mmap_region+0x1f9/0x2660 [ 61.024699] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.025228] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.025959] ? __pfx_lock_acquire+0x10/0x10 [ 61.026496] ? __pfx_mmap_region+0x10/0x10 [ 61.027032] ? security_mmap_addr+0x7d/0xa0 [ 61.027570] ? get_unmapped_area+0x1f5/0x3f0 [ 61.028132] do_mmap+0x854/0xf00 [ 61.028581] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.029085] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.029662] ksys_mmap_pgoff+0x3af/0x500 [ 61.030173] do_syscall_64+0x3f/0x90 [ 61.030649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.031296] RIP: 0033:0x7fb4af85bd82 [ 61.031752] 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 [ 61.033932] RSP: 002b:00007ffdc986b848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.034865] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4af85bd82 [ 61.035723] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb4aec95000 [ 61.036588] RBP: 00007fb4aec95000 R08: 0000000000000009 R09: 0000000000001000 [ 61.037445] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587d3b0aec0 [ 61.038303] R13: 00007ffdc986b860 R14: 00007ffdc986b890 R15: 00007ffdc986bbf0 [ 61.039172] [ 61.039474] [ 61.039691] Allocated by task 212: [ 61.040130] kasan_save_stack+0x22/0x50 [ 61.040639] kasan_set_track+0x25/0x30 [ 61.041137] __kasan_slab_alloc+0x59/0x70 [ 61.041670] kmem_cache_alloc+0x16b/0x370 [ 61.042192] vm_area_dup+0x20/0x160 [ 61.042656] __split_vma+0x170/0x950 [ 61.043124] split_vma+0xc6/0x110 [ 61.043569] mprotect_fixup+0x8d2/0xb30 [ 61.044101] do_mprotect_pkey+0x87e/0xd40 [ 61.044653] __x64_sys_mprotect+0x78/0xc0 [ 61.045179] do_syscall_64+0x3f/0x90 [ 61.045659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.046305] [ 61.046519] Freed by task 212: [ 61.046917] kasan_save_stack+0x22/0x50 [ 61.047418] kasan_set_track+0x25/0x30 [ 61.047918] kasan_save_free_info+0x2b/0x50 [ 61.048477] __kasan_slab_free+0x10a/0x190 [ 61.049013] kmem_cache_free+0x10d/0x4d0 [ 61.049529] rcu_core+0x8c8/0x2860 [ 61.049984] __do_softirq+0x1b7/0x7d4 [ 61.050478] [ 61.050700] Last potentially related work creation: [ 61.051299] kasan_save_stack+0x22/0x50 [ 61.051810] __kasan_record_aux_stack+0x8e/0xa0 [ 61.052412] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.053066] remove_vma+0x139/0x170 [ 61.053529] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.054098] do_vmi_munmap+0x1f1/0x2b0 [ 61.054592] __vm_munmap+0x138/0x3a0 [ 61.055086] __x64_sys_munmap+0x59/0x80 [ 61.055591] do_syscall_64+0x3f/0x90 [ 61.056097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.056754] [ 61.056981] The buggy address belongs to the object at ffff88800fe11bc8 [ 61.056981] which belongs to the cache vm_area_struct of size 168 [ 61.058472] The buggy address is located 88 bytes inside of [ 61.058472] freed 168-byte region [ffff88800fe11bc8, ffff88800fe11c70) [ 61.059947] [ 61.060179] The buggy address belongs to the physical page: [ 61.060835] page:000000007f0db191 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe11 [ 61.061919] memcg:ffff888018e84b01 [ 61.062353] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.063020] page_type: 0xffffffff() [ 61.063479] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.064433] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e84b01 [ 61.065375] page dumped because: kasan: bad access detected [ 61.066038] [ 61.066252] Memory state around the buggy address: [ 61.066835] ffff88800fe11b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.067703] ffff88800fe11b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 61.068591] >ffff88800fe11c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 61.069462] ^ [ 61.070004] ffff88800fe11c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 61.070874] ffff88800fe11d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 61.071742] ================================================================== [ 61.072789] Disabling lock debugging due to kernel taint [ 63.433060] BUG: Bad rss-counter state mm:00000000d5619a15 type:MM_FILEPAGES val:33 [ 63.434136] BUG: Bad rss-counter state mm:00000000d5619a15 type:MM_ANONPAGES val:22 [ 63.918210] BUG: Bad rss-counter state mm:00000000947e1cdf type:MM_FILEPAGES val:33 [ 63.919203] BUG: Bad rss-counter state mm:00000000947e1cdf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52096' (ECDSA) to the list of known hosts. 2023/06/21 00:03:50 fuzzer started 2023/06/21 00:03:50 dialing manager at localhost:36067 2023/06/21 00:03:50 checking machine... 2023/06/21 00:03:50 checking revisions... [ 64.642768] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:03:50 testing simple program... [ 64.696763] cgroup: Unknown subsys name 'net' [ 64.736522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:03:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055cf554200c0 RCX=000055cf55415d00 RDX=000000000000000a RSI=00007ffcd9e7c0a8 RDI=00007ffcd9e7c0a0 RBP=000000000000001b RSP=00007ffcd9e7c090 R8 =000055cf554244d3 R9 =00007f943c859be0 R10=000000000000006f R11=0000000000000246 R12=000055cf55415d00 R13=00007ffcd9e7c0a8 R14=00007f943c282b22 R15=00007f943c2a7710 RIP=00007f943c7106d2 RFL=00000246 [---Z-P-] 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 00007f943c2a7900 00000000 00000000 GS =0000 0000000000000000 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=00007f943c85c650 CR3=000000000dcda000 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=23232323232323232323232323232323 XMM01=000000000000000000000000000000ff XMM02=00000000000000000000000000000000 XMM03=090942414e455f47535f474f4c535953 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=0000ffffffffffffffffffffffffffff XMM08=7261762f09454c49465f474f4c555323 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001a116cb RBX=ffff88800d08b658 RCX=1ffff11001a116d2 RDX=1ffff11002ceaa7f RSI=ffffffff87b89f80 RDI=ffff8880167553f8 RBP=ffff8880090502c9 RSP=ffff88801036fca8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff8880167553f8 R13=dffffc0000000000 R14=ffff8880167553d8 R15=ffff888016755390 RIP=ffffffff844d3e49 RFL=00000096 [--S-AP-] 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 00007f943c2a7900 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=00007f943c85f0b0 CR3=000000000dcda000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000