syzkaller login: [ 31.787281] BUG: Bad rss-counter state mm:00000000a5519659 type:MM_FILEPAGES val:33 [ 31.789326] BUG: Bad rss-counter state mm:00000000a5519659 type:MM_ANONPAGES val:22 [ 31.952061] ================================================================== [ 31.953380] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.954388] Read of size 8 at addr ffff888014153d08 by task sshd/219 [ 31.955128] [ 31.955335] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.956144] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.957088] Call Trace: [ 31.957397] [ 31.957668] dump_stack_lvl+0x91/0xf0 [ 31.958129] print_report+0xcc/0x620 [ 31.958586] ? __virt_addr_valid+0x102/0x340 [ 31.959118] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.959699] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.960285] kasan_report+0xbe/0xf0 [ 31.960768] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.961349] vma_interval_tree_remove+0xc75/0xec0 [ 31.961930] vma_prepare+0xc54/0x11a0 [ 31.962406] __split_vma+0x5af/0x950 [ 31.962868] ? __pfx___split_vma+0x10/0x10 [ 31.963387] ? find_held_lock+0x2c/0x110 [ 31.963907] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.964461] ? lock_is_held_type+0x9f/0x120 [ 31.965004] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.965605] ? mtree_range_walk+0x632/0x900 [ 31.966157] ? mas_walk+0x5c7/0x7c0 [ 31.966632] do_vmi_munmap+0x1f1/0x2b0 [ 31.967114] mmap_region+0x1f9/0x2660 [ 31.967580] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.968085] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.968786] ? __pfx_lock_acquire+0x10/0x10 [ 31.969315] ? __pfx_mmap_region+0x10/0x10 [ 31.969842] ? security_mmap_addr+0x7d/0xa0 [ 31.970371] ? get_unmapped_area+0x1f5/0x3f0 [ 31.970905] do_mmap+0x854/0xf00 [ 31.971344] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.971842] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.972383] ksys_mmap_pgoff+0x3af/0x500 [ 31.972900] do_syscall_64+0x3f/0x90 [ 31.973377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.974003] RIP: 0033:0x7f1003641d82 [ 31.974458] 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 [ 31.976583] RSP: 002b:00007ffe4dad6618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.977479] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1003641d82 [ 31.978315] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1002a7b000 [ 31.979147] RBP: 00007f1002a7b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.979977] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d69575ff70 [ 31.980821] R13: 00007ffe4dad6630 R14: 00007ffe4dad6660 R15: 00007ffe4dad69c0 [ 31.981674] [ 31.981959] [ 31.982174] Allocated by task 212: [ 31.982607] kasan_save_stack+0x22/0x50 [ 31.983179] kasan_set_track+0x25/0x30 [ 31.983723] __kasan_slab_alloc+0x59/0x70 [ 31.984303] kmem_cache_alloc+0x16b/0x370 [ 31.984900] vm_area_dup+0x20/0x160 [ 31.985400] __split_vma+0x170/0x950 [ 31.985916] split_vma+0xc6/0x110 [ 31.986399] mprotect_fixup+0x8d2/0xb30 [ 31.986965] do_mprotect_pkey+0x87e/0xd40 [ 31.987540] __x64_sys_mprotect+0x78/0xc0 [ 31.988123] do_syscall_64+0x3f/0x90 [ 31.988674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.989437] [ 31.989703] Freed by task 212: [ 31.990182] kasan_save_stack+0x22/0x50 [ 31.990795] kasan_set_track+0x25/0x30 [ 31.991393] kasan_save_free_info+0x2b/0x50 [ 31.992009] __kasan_slab_free+0x10a/0x190 [ 31.992615] kmem_cache_free+0x10d/0x4d0 [ 31.993165] rcu_core+0x8c8/0x2860 [ 31.993658] __do_softirq+0x1b7/0x7d4 [ 31.994167] [ 31.994399] Last potentially related work creation: [ 31.995043] kasan_save_stack+0x22/0x50 [ 31.995585] __kasan_record_aux_stack+0x8e/0xa0 [ 31.996208] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.996941] remove_vma+0x139/0x170 [ 31.997413] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.998007] do_vmi_munmap+0x1f1/0x2b0 [ 31.998508] __vm_munmap+0x138/0x3a0 [ 31.999010] __x64_sys_munmap+0x59/0x80 [ 31.999538] do_syscall_64+0x3f/0x90 [ 32.000034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.000755] [ 32.000989] The buggy address belongs to the object at ffff888014153cb0 [ 32.000989] which belongs to the cache vm_area_struct of size 168 [ 32.002539] The buggy address is located 88 bytes inside of [ 32.002539] freed 168-byte region [ffff888014153cb0, ffff888014153d58) [ 32.004029] [ 32.004258] The buggy address belongs to the physical page: [ 32.004985] page:000000001a0f3260 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14153 [ 32.006148] memcg:ffff88800c9db801 [ 32.006603] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.007310] page_type: 0xffffffff() [ 32.007786] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.008771] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9db801 [ 32.009746] page dumped because: kasan: bad access detected [ 32.010443] [ 32.010674] Memory state around the buggy address: [ 32.011275] ffff888014153c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.012177] ffff888014153c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.013088] >ffff888014153d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.013985] ^ [ 32.014457] ffff888014153d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.015383] ffff888014153e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.016280] ================================================================== [ 32.017343] Disabling lock debugging due to kernel taint [ 34.715513] BUG: Bad rss-counter state mm:00000000475e5890 type:MM_FILEPAGES val:33 [ 34.716678] BUG: Bad rss-counter state mm:00000000475e5890 type:MM_ANONPAGES val:22 [ 35.180202] BUG: Bad rss-counter state mm:00000000dde47538 type:MM_FILEPAGES val:33 [ 35.181546] BUG: Bad rss-counter state mm:00000000dde47538 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58068' (ECDSA) to the list of known hosts. 2023/06/19 18:15:04 fuzzer started 2023/06/19 18:15:05 dialing manager at localhost:44161 2023/06/19 18:15:05 checking machine... 2023/06/19 18:15:05 checking revisions... [ 35.950763] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:15:05 testing simple program... [ 35.982860] cgroup: Unknown subsys name 'net' [ 36.035626] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:15:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11001d24f6f RCX=0000000000000001 RDX=0000000000000800 RSI=0000000000000008 RDI=ffff88800e927b98 RBP=00000000000001d0 RSP=ffff88800e927af0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000008 R13=0000000000000800 R14=ffff88800e927b98 R15=ffff88800e557be0 RIP=ffffffff813ad5ab 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 00007fcbcb83e900 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=00007fcbcbdf60b0 CR3=000000000dd16000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ff4072582c0 CR3=0000000013aa6000 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=3cd60b8e358b4fb448449a7b86be753b XMM02=ec2efd57dc4c00df000000000011c460 XMM03=db4870b4f3cd8c8f000000000011c530 XMM04=54cae0684f66196800000000000ae988 XMM05=dfcdbad4f1609c370000000000133858 XMM06=42d00903d6f0212c00000000001326c0 XMM07=e042d86d42eb936e0000000000123f90 XMM08=db4870b4f3cd8c8f000000000011c530 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000