syzkaller login: [ 61.343878] BUG: Bad rss-counter state mm:000000000d510fa6 type:MM_FILEPAGES val:33 [ 61.344913] BUG: Bad rss-counter state mm:000000000d510fa6 type:MM_ANONPAGES val:22 [ 61.493113] ================================================================== [ 61.494099] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.495098] Read of size 8 at addr ffff88800e57c6b0 by task sshd/219 [ 61.495958] [ 61.496217] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.497334] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.498396] Call Trace: [ 61.498776] [ 61.499104] dump_stack_lvl+0x91/0xf0 [ 61.499661] print_report+0xcc/0x620 [ 61.500199] ? __virt_addr_valid+0x102/0x340 [ 61.500789] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.501486] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.502165] kasan_report+0xbe/0xf0 [ 61.502682] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.503362] vma_interval_tree_remove+0xc75/0xec0 [ 61.504020] vma_prepare+0xc54/0x11a0 [ 61.504548] __split_vma+0x5af/0x950 [ 61.505055] ? __pfx___split_vma+0x10/0x10 [ 61.505632] ? find_held_lock+0x2c/0x110 [ 61.506227] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.506843] ? lock_is_held_type+0x9f/0x120 [ 61.507443] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.508123] ? mtree_range_walk+0x632/0x900 [ 61.508711] ? mas_walk+0x5c7/0x7c0 [ 61.509223] do_vmi_munmap+0x1f1/0x2b0 [ 61.509760] mmap_region+0x1f9/0x2660 [ 61.510280] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.510836] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.511628] ? __pfx_lock_acquire+0x10/0x10 [ 61.512209] ? __pfx_mmap_region+0x10/0x10 [ 61.512783] ? security_mmap_addr+0x7d/0xa0 [ 61.513360] ? get_unmapped_area+0x1f5/0x3f0 [ 61.513947] do_mmap+0x854/0xf00 [ 61.514418] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.514949] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.515568] ksys_mmap_pgoff+0x3af/0x500 [ 61.516111] do_syscall_64+0x3f/0x90 [ 61.516631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.517328] RIP: 0033:0x7fc6bb0f6d82 [ 61.517824] 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 [ 61.520123] RSP: 002b:00007ffdc2bf43d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.521106] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6bb0f6d82 [ 61.522028] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6ba530000 [ 61.522939] RBP: 00007fc6ba530000 R08: 0000000000000009 R09: 0000000000001000 [ 61.523863] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6d0516ec0 [ 61.524782] R13: 00007ffdc2bf43f0 R14: 00007ffdc2bf4420 R15: 00007ffdc2bf4780 [ 61.525719] [ 61.526037] [ 61.526266] Allocated by task 212: [ 61.526730] kasan_save_stack+0x22/0x50 [ 61.527279] kasan_set_track+0x25/0x30 [ 61.527832] __kasan_slab_alloc+0x59/0x70 [ 61.528393] kmem_cache_alloc+0x16b/0x370 [ 61.528950] vm_area_dup+0x20/0x160 [ 61.529434] __split_vma+0x170/0x950 [ 61.529938] split_vma+0xc6/0x110 [ 61.530406] mprotect_fixup+0x8d2/0xb30 [ 61.530942] do_mprotect_pkey+0x87e/0xd40 [ 61.531522] __x64_sys_mprotect+0x78/0xc0 [ 61.532083] do_syscall_64+0x3f/0x90 [ 61.532595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.533282] [ 61.533517] Freed by task 212: [ 61.533940] kasan_save_stack+0x22/0x50 [ 61.534485] kasan_set_track+0x25/0x30 [ 61.535015] kasan_save_free_info+0x2b/0x50 [ 61.535608] __kasan_slab_free+0x10a/0x190 [ 61.536176] kmem_cache_free+0x10d/0x4d0 [ 61.536719] rcu_core+0x8c8/0x2860 [ 61.537194] __do_softirq+0x1b7/0x7d4 [ 61.537707] [ 61.537944] Last potentially related work creation: [ 61.538573] kasan_save_stack+0x22/0x50 [ 61.539116] __kasan_record_aux_stack+0x8e/0xa0 [ 61.539760] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.540454] remove_vma+0x139/0x170 [ 61.540940] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.541537] do_vmi_munmap+0x1f1/0x2b0 [ 61.542057] __vm_munmap+0x138/0x3a0 [ 61.542562] __x64_sys_munmap+0x59/0x80 [ 61.543097] do_syscall_64+0x3f/0x90 [ 61.543622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.544317] [ 61.544546] The buggy address belongs to the object at ffff88800e57c658 [ 61.544546] which belongs to the cache vm_area_struct of size 168 [ 61.546130] The buggy address is located 88 bytes inside of [ 61.546130] freed 168-byte region [ffff88800e57c658, ffff88800e57c700) [ 61.547646] [ 61.547881] The buggy address belongs to the physical page: [ 61.548584] page:000000000301017f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe57c [ 61.549742] memcg:ffff888016b22601 [ 61.550205] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.550908] page_type: 0xffffffff() [ 61.551391] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.552402] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b22601 [ 61.553369] page dumped because: kasan: bad access detected [ 61.554093] [ 61.554323] Memory state around the buggy address: [ 61.554952] ffff88800e57c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.555887] ffff88800e57c600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 61.556802] >ffff88800e57c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.557714] ^ [ 61.558345] ffff88800e57c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.559274] ffff88800e57c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.560240] ================================================================== [ 61.561715] Disabling lock debugging due to kernel taint [ 63.490002] BUG: Bad rss-counter state mm:0000000030b5f2b6 type:MM_FILEPAGES val:33 [ 63.491685] BUG: Bad rss-counter state mm:0000000030b5f2b6 type:MM_ANONPAGES val:22 [ 63.984243] BUG: Bad rss-counter state mm:000000002a9d2431 type:MM_FILEPAGES val:33 [ 63.985248] BUG: Bad rss-counter state mm:000000002a9d2431 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31283' (ECDSA) to the list of known hosts. 2023/06/20 03:29:59 fuzzer started 2023/06/20 03:29:59 dialing manager at localhost:44161 2023/06/20 03:29:59 checking machine... 2023/06/20 03:29:59 checking revisions... [ 64.729196] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:29:59 testing simple program... [ 64.785599] cgroup: Unknown subsys name 'net' [ 64.826474] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:29:57 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff814c8504 RDI=ffff88800fc99f34 RBP=0000000000000000 RSP=ffff888015f2f930 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000000cc0 RIP=ffffffff814c07f1 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 00007fe154d02900 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=00007fe1552ba0b0 CR3=00000000199c4000 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=00007faa7ad90b90 CR3=000000000d826000 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=39de94dbe6331e85a2466ac174b6ee88 XMM02=0000000000120000ec2efd57dc4c00df XMM03=00000000001247a0e9d2ceeb81de404e XMM04=79c9c9014981925900000000000ae988 XMM05=dfcdbad4f1609c370000000000134330 XMM06=fdfd61e61e2554c60000000000133198 XMM07=e042d86d42eb936e0000000000124a20 XMM08=e9d2ceeb81de404e0000000000120060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000