syzkaller login: [ 77.363614] BUG: Bad rss-counter state mm:00000000accc3d40 type:MM_FILEPAGES val:33 [ 77.364976] BUG: Bad rss-counter state mm:00000000accc3d40 type:MM_ANONPAGES val:22 [ 77.510291] ================================================================== [ 77.511369] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 77.512509] Read of size 8 at addr ffff88801a028140 by task sshd/220 [ 77.513409] [ 77.513629] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 77.514656] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 77.515636] Call Trace: [ 77.515964] [ 77.516257] dump_stack_lvl+0x91/0xf0 [ 77.516751] print_report+0xcc/0x620 [ 77.517246] ? __virt_addr_valid+0x102/0x340 [ 77.517802] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.518425] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.519062] kasan_report+0xbe/0xf0 [ 77.519542] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.520195] vma_interval_tree_remove+0xc75/0xec0 [ 77.520794] vma_prepare+0xc54/0x11a0 [ 77.521278] __split_vma+0x5af/0x950 [ 77.521759] ? __pfx___split_vma+0x10/0x10 [ 77.522295] ? find_held_lock+0x2c/0x110 [ 77.522833] do_vmi_align_munmap+0x2ba/0x11f0 [ 77.523406] ? lock_is_held_type+0x9f/0x120 [ 77.523965] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 77.524585] ? mtree_range_walk+0x632/0x900 [ 77.525144] ? mas_walk+0x5c7/0x7c0 [ 77.525622] do_vmi_munmap+0x1f1/0x2b0 [ 77.526112] mmap_region+0x1f9/0x2660 [ 77.526599] ? vm_mmap_pgoff+0x15c/0x3a0 [ 77.527117] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 77.527831] ? __pfx_lock_acquire+0x10/0x10 [ 77.528375] ? __pfx_mmap_region+0x10/0x10 [ 77.528909] ? security_mmap_addr+0x7d/0xa0 [ 77.529445] ? get_unmapped_area+0x1f5/0x3f0 [ 77.530010] do_mmap+0x854/0xf00 [ 77.530460] vm_mmap_pgoff+0x1a6/0x3a0 [ 77.530954] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 77.531519] ksys_mmap_pgoff+0x3af/0x500 [ 77.532034] do_syscall_64+0x3f/0x90 [ 77.532513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.533162] RIP: 0033:0x7f5941620d82 [ 77.533628] 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 [ 77.535746] RSP: 002b:00007fff9bfc3c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 77.536672] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5941620d82 [ 77.537520] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5940a5a000 [ 77.538363] RBP: 00007f5940a5a000 R08: 0000000000000009 R09: 0000000000001000 [ 77.539212] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c78539ec0 [ 77.540073] R13: 00007fff9bfc3c50 R14: 00007fff9bfc3c80 R15: 00007fff9bfc3fe0 [ 77.540931] [ 77.541227] [ 77.541448] Allocated by task 213: [ 77.541876] kasan_save_stack+0x22/0x50 [ 77.542385] kasan_set_track+0x25/0x30 [ 77.542885] __kasan_slab_alloc+0x59/0x70 [ 77.543413] kmem_cache_alloc+0x16b/0x370 [ 77.543948] vm_area_dup+0x20/0x160 [ 77.544409] __split_vma+0x170/0x950 [ 77.544878] split_vma+0xc6/0x110 [ 77.545320] mprotect_fixup+0x8d2/0xb30 [ 77.545832] do_mprotect_pkey+0x87e/0xd40 [ 77.546355] __x64_sys_mprotect+0x78/0xc0 [ 77.546879] do_syscall_64+0x3f/0x90 [ 77.547358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.548016] [ 77.548233] Freed by task 213: [ 77.548625] kasan_save_stack+0x22/0x50 [ 77.549146] kasan_set_track+0x25/0x30 [ 77.549646] kasan_save_free_info+0x2b/0x50 [ 77.550186] __kasan_slab_free+0x10a/0x190 [ 77.550722] kmem_cache_free+0x10d/0x4d0 [ 77.551237] rcu_core+0x8c8/0x2860 [ 77.551684] __do_softirq+0x1b7/0x7d4 [ 77.552181] [ 77.552399] Last potentially related work creation: [ 77.552989] kasan_save_stack+0x22/0x50 [ 77.553500] __kasan_record_aux_stack+0x8e/0xa0 [ 77.554077] __call_rcu_common.constprop.0+0x6a/0xb90 [ 77.554722] remove_vma+0x139/0x170 [ 77.555172] do_vmi_align_munmap+0xd4a/0x11f0 [ 77.555729] do_vmi_munmap+0x1f1/0x2b0 [ 77.556225] __vm_munmap+0x138/0x3a0 [ 77.556702] __x64_sys_munmap+0x59/0x80 [ 77.557211] do_syscall_64+0x3f/0x90 [ 77.557690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.558342] [ 77.558564] The buggy address belongs to the object at ffff88801a0280e8 [ 77.558564] which belongs to the cache vm_area_struct of size 168 [ 77.560055] The buggy address is located 88 bytes inside of [ 77.560055] freed 168-byte region [ffff88801a0280e8, ffff88801a028190) [ 77.561468] [ 77.561694] The buggy address belongs to the physical page: [ 77.562354] page:00000000769000f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a028 [ 77.563459] memcg:ffff888016588801 [ 77.563907] flags: 0x100000000000200(slab|node=0|zone=1) [ 77.564556] page_type: 0xffffffff() [ 77.565009] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 77.565950] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016588801 [ 77.566864] page dumped because: kasan: bad access detected [ 77.567530] [ 77.567749] Memory state around the buggy address: [ 77.568345] ffff88801a028000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 77.569209] ffff88801a028080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 77.570066] >ffff88801a028100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 77.570918] ^ [ 77.571571] ffff88801a028180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 77.572440] ffff88801a028200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 77.573291] ================================================================== [ 77.574266] Disabling lock debugging due to kernel taint [ 79.448524] BUG: Bad rss-counter state mm:000000004643b87e type:MM_FILEPAGES val:33 [ 79.449927] BUG: Bad rss-counter state mm:000000004643b87e type:MM_ANONPAGES val:22 [ 79.927635] BUG: Bad rss-counter state mm:00000000122c37d8 type:MM_FILEPAGES val:33 [ 79.928748] BUG: Bad rss-counter state mm:00000000122c37d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7534' (ECDSA) to the list of known hosts. 2023/06/19 22:32:26 fuzzer started 2023/06/19 22:32:26 dialing manager at localhost:44161 2023/06/19 22:32:26 checking machine... 2023/06/19 22:32:26 checking revisions... [ 80.662252] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:32:26 testing simple program... [ 80.713909] cgroup: Unknown subsys name 'net' [ 80.769286] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:31:38 Registers: info registers vcpu 0 RAX=ffff888014518001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014517b01 RSI=ffff888014517b28 RDI=ffff888014517b28 RBP=ffff8880145172b0 RSP=ffff8880145171e0 R8 =0000000000000001 R9 =ffff888014517298 R10=0000000000038001 R11=000000000008a842 R12=ffff8880145172b8 R13=ffff8880145172a0 R14=ffff888014517b28 R15=ffff888014517258 RIP=ffffffff8112fbf0 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 00007fc518caf900 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=00007fc519266618 CR3=000000001450e000 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=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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007ffe602fb248 CR3=000000000fe9c000 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=2035323a32333a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a32333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000