syzkaller login: [ 38.903423] BUG: Bad rss-counter state mm:000000008943c5c2 type:MM_FILEPAGES val:33 [ 38.904671] BUG: Bad rss-counter state mm:000000008943c5c2 type:MM_ANONPAGES val:22 [ 39.051353] ================================================================== [ 39.052279] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.053241] Read of size 8 at addr ffff888009747a50 by task sshd/224 [ 39.054155] [ 39.054417] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.055289] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.056276] Call Trace: [ 39.056626] [ 39.056912] dump_stack_lvl+0x91/0xf0 [ 39.057410] print_report+0xcc/0x620 [ 39.057922] ? __virt_addr_valid+0x102/0x340 [ 39.058480] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.059117] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.059751] kasan_report+0xbe/0xf0 [ 39.060241] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.060866] vma_interval_tree_remove+0xc75/0xec0 [ 39.061465] vma_prepare+0xc54/0x11a0 [ 39.061956] __split_vma+0x5af/0x950 [ 39.062430] ? __pfx___split_vma+0x10/0x10 [ 39.062961] ? find_held_lock+0x2c/0x110 [ 39.063477] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.064038] ? lock_is_held_type+0x9f/0x120 [ 39.064576] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.065185] ? mtree_range_walk+0x632/0x900 [ 39.065745] ? mas_walk+0x5c7/0x7c0 [ 39.066218] do_vmi_munmap+0x1f1/0x2b0 [ 39.066709] mmap_region+0x1f9/0x2660 [ 39.067195] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.067706] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.068419] ? __pfx_lock_acquire+0x10/0x10 [ 39.068956] ? __pfx_mmap_region+0x10/0x10 [ 39.069490] ? security_mmap_addr+0x7d/0xa0 [ 39.070061] ? get_unmapped_area+0x1f5/0x3f0 [ 39.070611] do_mmap+0x854/0xf00 [ 39.071060] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.071565] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.072143] ksys_mmap_pgoff+0x3af/0x500 [ 39.072650] do_syscall_64+0x3f/0x90 [ 39.073128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.073789] RIP: 0033:0x7fa07010fd82 [ 39.074254] 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 [ 39.076392] RSP: 002b:00007ffdc1bb8028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.077306] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa07010fd82 [ 39.078191] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa06f549000 [ 39.079040] RBP: 00007fa06f549000 R08: 0000000000000009 R09: 0000000000001000 [ 39.079883] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f81488b20 [ 39.080729] R13: 00007ffdc1bb8040 R14: 00007ffdc1bb8070 R15: 00007ffdc1bb83d0 [ 39.081596] [ 39.081894] [ 39.082112] Allocated by task 217: [ 39.082557] kasan_save_stack+0x22/0x50 [ 39.083083] kasan_set_track+0x25/0x30 [ 39.083588] __kasan_slab_alloc+0x59/0x70 [ 39.084126] kmem_cache_alloc+0x16b/0x370 [ 39.084640] vm_area_dup+0x20/0x160 [ 39.085097] __split_vma+0x170/0x950 [ 39.085571] split_vma+0xc6/0x110 [ 39.086023] mprotect_fixup+0x8d2/0xb30 [ 39.086527] do_mprotect_pkey+0x87e/0xd40 [ 39.087049] __x64_sys_mprotect+0x78/0xc0 [ 39.087570] do_syscall_64+0x3f/0x90 [ 39.088048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.088700] [ 39.088917] Freed by task 217: [ 39.089304] kasan_save_stack+0x22/0x50 [ 39.089820] kasan_set_track+0x25/0x30 [ 39.090312] kasan_save_free_info+0x2b/0x50 [ 39.090845] __kasan_slab_free+0x10a/0x190 [ 39.091379] kmem_cache_free+0x10d/0x4d0 [ 39.091888] rcu_core+0x8c8/0x2860 [ 39.092336] __do_softirq+0x1b7/0x7d4 [ 39.092812] [ 39.093030] Last potentially related work creation: [ 39.093631] kasan_save_stack+0x22/0x50 [ 39.094135] __kasan_record_aux_stack+0x8e/0xa0 [ 39.094706] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.095392] remove_vma+0x139/0x170 [ 39.095860] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.096419] do_vmi_munmap+0x1f1/0x2b0 [ 39.096903] __vm_munmap+0x138/0x3a0 [ 39.097370] __x64_sys_munmap+0x59/0x80 [ 39.097872] do_syscall_64+0x3f/0x90 [ 39.098345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.098990] [ 39.099207] The buggy address belongs to the object at ffff8880097479f8 [ 39.099207] which belongs to the cache vm_area_struct of size 168 [ 39.100667] The buggy address is located 88 bytes inside of [ 39.100667] freed 168-byte region [ffff8880097479f8, ffff888009747aa0) [ 39.102075] [ 39.102294] The buggy address belongs to the physical page: [ 39.102953] page:0000000045a285f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9747 [ 39.104033] memcg:ffff88800fc21a01 [ 39.104461] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.105124] page_type: 0xffffffff() [ 39.105607] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.106532] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc21a01 [ 39.107458] page dumped because: kasan: bad access detected [ 39.108124] [ 39.108338] Memory state around the buggy address: [ 39.108936] ffff888009747900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.109807] ffff888009747980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 39.110663] >ffff888009747a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.111513] ^ [ 39.112219] ffff888009747a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.113069] ffff888009747b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.113929] ================================================================== [ 39.114848] Disabling lock debugging due to kernel taint [ 41.008076] BUG: Bad rss-counter state mm:0000000077acfb1e type:MM_FILEPAGES val:33 [ 41.008970] BUG: Bad rss-counter state mm:0000000077acfb1e type:MM_ANONPAGES val:22 [ 41.417228] BUG: Bad rss-counter state mm:000000008d09daa7 type:MM_FILEPAGES val:33 [ 41.417982] BUG: Bad rss-counter state mm:000000008d09daa7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62936' (ECDSA) to the list of known hosts. 2023/06/20 07:15:32 fuzzer started 2023/06/20 07:15:33 dialing manager at localhost:44161 2023/06/20 07:15:33 checking machine... 2023/06/20 07:15:33 checking revisions... [ 42.100037] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:15:33 testing simple program... [ 42.147349] cgroup: Unknown subsys name 'net' [ 42.205143] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:15:32 Registers: info registers vcpu 0 RAX=0000000000002710 RBX=ffff88800d953180 RCX=ffffffff81370fff RDX=1ffff1100d9c747b RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88806ce3a3d8 RSP=ffff888016c67df8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00000000000000b8 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff81534215 RFL=00000083 [--S---C] 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 00007fc052749900 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=00007ffd0b5af000 CR3=0000000016666000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0adb045 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff88806cf09c90 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0adb044 R14=0000000000000001 R15=1ffff1100d9e1393 RIP=ffffffff845308c8 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=00007f8b06ef8070 CR3=00000000139d4000 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=c6ab199d0c3feb99304b2ad2bdb043a9 XMM02=000000000011da48ec2efd57dc4c00df XMM03=00000000001244081ff26f96ea5b362d XMM04=65c3c6fe71962b4c00000000000ae988 XMM05=6860aeb314f8829d0000000000133ce0 XMM06=9910fc1ccc9b11560000000000132eb8 XMM07=e042d86d42eb936e00000000001246e0 XMM08=1ff26f96ea5b362d000000000011daa8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000