syzkaller login: [ 30.780309] BUG: Bad rss-counter state mm:00000000af5e97df type:MM_FILEPAGES val:33 [ 30.781547] BUG: Bad rss-counter state mm:00000000af5e97df type:MM_ANONPAGES val:22 [ 30.816246] ================================================================== [ 30.817315] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.818408] Read of size 8 at addr ffff88800eaf6140 by task sshd/220 [ 30.819307] [ 30.819540] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.820604] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.821702] Call Trace: [ 30.822045] <TASK> [ 30.822334] dump_stack_lvl+0x91/0xf0 [ 30.822829] print_report+0xcc/0x620 [ 30.823319] ? __virt_addr_valid+0x102/0x340 [ 30.823869] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.824592] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.825309] kasan_report+0xbe/0xf0 [ 30.825789] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.826542] vma_interval_tree_remove+0xc75/0xec0 [ 30.827185] vma_prepare+0xc54/0x11a0 [ 30.827677] __split_vma+0x5af/0x950 [ 30.828202] ? __pfx___split_vma+0x10/0x10 [ 30.828893] ? find_held_lock+0x2c/0x110 [ 30.829475] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.830216] ? lock_is_held_type+0x9f/0x120 [ 30.830824] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.831552] ? mtree_range_walk+0x632/0x900 [ 30.832169] ? mas_walk+0x5c7/0x7c0 [ 30.832657] do_vmi_munmap+0x1f1/0x2b0 [ 30.833246] mmap_region+0x1f9/0x2660 [ 30.833802] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.834448] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.835184] ? __pfx_lock_acquire+0x10/0x10 [ 30.835723] ? __pfx_mmap_region+0x10/0x10 [ 30.836255] ? security_mmap_addr+0x7d/0xa0 [ 30.836795] ? get_unmapped_area+0x1f5/0x3f0 [ 30.837357] do_mmap+0x854/0xf00 [ 30.837800] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.838360] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.838932] ksys_mmap_pgoff+0x3af/0x500 [ 30.839447] do_syscall_64+0x3f/0x90 [ 30.839933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.840671] RIP: 0033:0x7fc5e1fdcd82 [ 30.841143] 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 [ 30.843319] RSP: 002b:00007ffc1f46dd68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.844262] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5e1fdcd82 [ 30.845355] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5e1416000 [ 30.846242] RBP: 00007fc5e1416000 R08: 0000000000000009 R09: 0000000000001000 [ 30.847099] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614a9479ec0 [ 30.847966] R13: 00007ffc1f46dd80 R14: 00007ffc1f46ddb0 R15: 00007ffc1f46e110 [ 30.848831] </TASK> [ 30.849151] [ 30.849431] Allocated by task 213: [ 30.849934] kasan_save_stack+0x22/0x50 [ 30.850460] kasan_set_track+0x25/0x30 [ 30.850967] __kasan_slab_alloc+0x59/0x70 [ 30.851498] kmem_cache_alloc+0x16b/0x370 [ 30.852024] vm_area_dup+0x20/0x160 [ 30.852487] __split_vma+0x170/0x950 [ 30.852960] split_vma+0xc6/0x110 [ 30.853404] mprotect_fixup+0x8d2/0xb30 [ 30.853919] do_mprotect_pkey+0x87e/0xd40 [ 30.854447] __x64_sys_mprotect+0x78/0xc0 [ 30.854973] do_syscall_64+0x3f/0x90 [ 30.855469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.856124] [ 30.856345] Freed by task 213: [ 30.856796] kasan_save_stack+0x22/0x50 [ 30.857352] kasan_set_track+0x25/0x30 [ 30.857910] kasan_save_free_info+0x2b/0x50 [ 30.858520] __kasan_slab_free+0x10a/0x190 [ 30.859055] kmem_cache_free+0x10d/0x4d0 [ 30.859576] rcu_core+0x8c8/0x2860 [ 30.860040] __do_softirq+0x1b7/0x7d4 [ 30.860562] [ 30.860787] Last potentially related work creation: [ 30.861379] kasan_save_stack+0x22/0x50 [ 30.861898] __kasan_record_aux_stack+0x8e/0xa0 [ 30.862472] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.863218] remove_vma+0x139/0x170 [ 30.863694] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.864260] do_vmi_munmap+0x1f1/0x2b0 [ 30.864751] __vm_munmap+0x138/0x3a0 [ 30.865223] __x64_sys_munmap+0x59/0x80 [ 30.865727] do_syscall_64+0x3f/0x90 [ 30.866228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866884] [ 30.867101] The buggy address belongs to the object at ffff88800eaf60e8 [ 30.867101] which belongs to the cache vm_area_struct of size 168 [ 30.868805] The buggy address is located 88 bytes inside of [ 30.868805] freed 168-byte region [ffff88800eaf60e8, ffff88800eaf6190) [ 30.870251] [ 30.870470] The buggy address belongs to the physical page: [ 30.871119] page:0000000062461d7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeaf6 [ 30.872266] memcg:ffff888009f3df01 [ 30.872705] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.873342] page_type: 0xffffffff() [ 30.873794] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.874702] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009f3df01 [ 30.875590] page dumped because: kasan: bad access detected [ 30.876246] [ 30.876484] Memory state around the buggy address: [ 30.877072] ffff88800eaf6000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.877933] ffff88800eaf6080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.878769] >ffff88800eaf6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.879597] ^ [ 30.880224] ffff88800eaf6180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.881108] ffff88800eaf6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.881977] ================================================================== [ 30.883188] Disabling lock debugging due to kernel taint [ 32.671373] BUG: Bad rss-counter state mm:00000000e4259f6f type:MM_FILEPAGES val:33 [ 32.672407] BUG: Bad rss-counter state mm:00000000e4259f6f type:MM_ANONPAGES val:22 [ 33.189736] BUG: Bad rss-counter state mm:00000000e5bf0b92 type:MM_FILEPAGES val:33 [ 33.190888] BUG: Bad rss-counter state mm:00000000e5bf0b92 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10253' (ECDSA) to the list of known hosts. 2023/06/21 07:54:37 fuzzer started 2023/06/21 07:54:37 dialing manager at localhost:36067 2023/06/21 07:54:37 checking machine... 2023/06/21 07:54:37 checking revisions... [ 33.909628] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:54:38 testing simple program... [ 33.964657] cgroup: Unknown subsys name 'net' [ 34.002729] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:54:37 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11001e08f8f RSP=ffff88800f047c58 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffffffff856c1fc0 R13=ffffffff81808672 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff8135b979 RFL=00000202 [-------] 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 00007fb2886a4900 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=00007fb288c59650 CR3=0000000015c36000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000006 RDX=ffff8880147587c0 RSI=ffff888008dfc0e0 RDI=ffff8880090b5808 RBP=ffff8880090b5800 RSP=ffff888016bef530 R8 =0000000000000010 R9 =ffff888016bef6e8 R10=0000000000000200 R11=0000000000000001 R12=ffff888008dfc0d8 R13=0000000000000550 R14=ffff8880090b5808 R15=dffffc0000000000 RIP=ffffffff81f75754 RFL=00000293 [--S-A-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 00007fb4f3e7c8c0 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=00007f6a5376d3c0 CR3=000000000d5be000 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=00005609dd4f4c6000005609dd5067c0 XMM01=00000001ffffffff00005609dd4f4c60 XMM02=00005609dd514d200000000000000003 XMM03=00005609dd4c556000005609dd5067e0 XMM04=00000003ffffffff00005609dd4c5560 XMM05=00005609dd4ee07000005609dd514d20 XMM06=00005609dd4f18a00000000000000000 XMM07=ffffffff0000000200005609dd4f0db0 XMM08=20202020203a657a697320656c696600 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000