syzkaller login: [ 30.769215] BUG: Bad rss-counter state mm:00000000a1195e59 type:MM_FILEPAGES val:33 [ 30.770366] BUG: Bad rss-counter state mm:00000000a1195e59 type:MM_ANONPAGES val:22 [ 30.810483] ================================================================== [ 30.811728] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.812857] Read of size 8 at addr ffff88800e6fdc20 by task sshd/220 [ 30.813727] [ 30.813947] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.814847] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.815892] Call Trace: [ 30.816217] [ 30.816513] dump_stack_lvl+0x91/0xf0 [ 30.817014] print_report+0xcc/0x620 [ 30.817522] ? __virt_addr_valid+0x102/0x340 [ 30.818088] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.818733] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819373] kasan_report+0xbe/0xf0 [ 30.819863] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.820498] vma_interval_tree_remove+0xc75/0xec0 [ 30.821107] vma_prepare+0xc54/0x11a0 [ 30.821620] __split_vma+0x5af/0x950 [ 30.822090] ? __pfx___split_vma+0x10/0x10 [ 30.822645] ? find_held_lock+0x2c/0x110 [ 30.823163] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.823739] ? lock_is_held_type+0x9f/0x120 [ 30.824273] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.824883] ? mtree_range_walk+0x632/0x900 [ 30.825462] ? mas_walk+0x5c7/0x7c0 [ 30.825937] do_vmi_munmap+0x1f1/0x2b0 [ 30.826450] mmap_region+0x1f9/0x2660 [ 30.826936] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.827467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.828174] ? __pfx_lock_acquire+0x10/0x10 [ 30.828715] ? __pfx_mmap_region+0x10/0x10 [ 30.829266] ? security_mmap_addr+0x7d/0xa0 [ 30.829808] ? get_unmapped_area+0x1f5/0x3f0 [ 30.830368] do_mmap+0x854/0xf00 [ 30.830824] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.831318] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.831890] ksys_mmap_pgoff+0x3af/0x500 [ 30.832422] do_syscall_64+0x3f/0x90 [ 30.832905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833610] RIP: 0033:0x7f2d2e786d82 [ 30.834065] 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 [ 30.836230] RSP: 002b:00007ffcce1daa48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.837375] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d2e786d82 [ 30.838218] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d2dbc0000 [ 30.839077] RBP: 00007f2d2dbc0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.839961] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cdaf1bbec0 [ 30.840820] R13: 00007ffcce1daa60 R14: 00007ffcce1daa90 R15: 00007ffcce1dadf0 [ 30.841693] [ 30.841987] [ 30.842205] Allocated by task 213: [ 30.842659] kasan_save_stack+0x22/0x50 [ 30.843159] kasan_set_track+0x25/0x30 [ 30.843665] __kasan_slab_alloc+0x59/0x70 [ 30.844184] kmem_cache_alloc+0x16b/0x370 [ 30.844703] vm_area_dup+0x20/0x160 [ 30.845176] __split_vma+0x170/0x950 [ 30.845667] split_vma+0xc6/0x110 [ 30.846099] mprotect_fixup+0x8d2/0xb30 [ 30.846621] do_mprotect_pkey+0x87e/0xd40 [ 30.847147] __x64_sys_mprotect+0x78/0xc0 [ 30.847688] do_syscall_64+0x3f/0x90 [ 30.848167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.848831] [ 30.849056] Freed by task 213: [ 30.849484] kasan_save_stack+0x22/0x50 [ 30.849986] kasan_set_track+0x25/0x30 [ 30.850503] kasan_save_free_info+0x2b/0x50 [ 30.851045] __kasan_slab_free+0x10a/0x190 [ 30.851597] kmem_cache_free+0x10d/0x4d0 [ 30.852098] rcu_core+0x8c8/0x2860 [ 30.852555] __do_softirq+0x1b7/0x7d4 [ 30.853047] [ 30.853277] Last potentially related work creation: [ 30.853871] kasan_save_stack+0x22/0x50 [ 30.854400] __kasan_record_aux_stack+0x8e/0xa0 [ 30.854970] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.855624] remove_vma+0x139/0x170 [ 30.856072] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.856641] do_vmi_munmap+0x1f1/0x2b0 [ 30.857125] __vm_munmap+0x138/0x3a0 [ 30.857625] __x64_sys_munmap+0x59/0x80 [ 30.858122] do_syscall_64+0x3f/0x90 [ 30.858615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.859261] [ 30.859493] Second to last potentially related work creation: [ 30.860169] kasan_save_stack+0x22/0x50 [ 30.860688] __kasan_record_aux_stack+0x8e/0xa0 [ 30.861267] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.861921] remove_vma+0x139/0x170 [ 30.862394] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.862950] do_vmi_munmap+0x1f1/0x2b0 [ 30.863446] mmap_region+0x1f9/0x2660 [ 30.863920] do_mmap+0x854/0xf00 [ 30.864365] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.864848] ksys_mmap_pgoff+0x3af/0x500 [ 30.865377] do_syscall_64+0x3f/0x90 [ 30.865849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866499] [ 30.866714] The buggy address belongs to the object at ffff88800e6fdbc8 [ 30.866714] which belongs to the cache vm_area_struct of size 168 [ 30.868199] The buggy address is located 88 bytes inside of [ 30.868199] freed 168-byte region [ffff88800e6fdbc8, ffff88800e6fdc70) [ 30.869632] [ 30.869849] The buggy address belongs to the physical page: [ 30.870522] page:00000000b5022529 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6fd [ 30.871617] memcg:ffff88800e4b4701 [ 30.872042] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.872767] page_type: 0xffffffff() [ 30.873225] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a3040 dead000000000007 [ 30.874195] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4b4701 [ 30.875109] page dumped because: kasan: bad access detected [ 30.875780] [ 30.875997] Memory state around the buggy address: [ 30.876590] ffff88800e6fdb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.877487] ffff88800e6fdb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.878361] >ffff88800e6fdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.879217] ^ [ 30.879777] ffff88800e6fdc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.880662] ffff88800e6fdd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.881537] ================================================================== [ 30.882751] Disabling lock debugging due to kernel taint [ 33.369862] BUG: Bad rss-counter state mm:00000000dcbc9d87 type:MM_FILEPAGES val:33 [ 33.371280] BUG: Bad rss-counter state mm:00000000dcbc9d87 type:MM_ANONPAGES val:22 [ 33.789388] BUG: Bad rss-counter state mm:00000000bc3dd5f0 type:MM_FILEPAGES val:33 [ 33.790572] BUG: Bad rss-counter state mm:00000000bc3dd5f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41657' (ECDSA) to the list of known hosts. 2023/06/20 13:01:10 fuzzer started 2023/06/20 13:01:10 dialing manager at localhost:36067 2023/06/20 13:01:10 checking machine... 2023/06/20 13:01:10 checking revisions... [ 34.522824] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:01:11 testing simple program... [ 34.577835] cgroup: Unknown subsys name 'net' [ 34.639415] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:01:10 Registers: info registers vcpu 0 RAX=1ffff11002023969 RBX=ffff88801011cb18 RCX=1ffff11002029944 RDX=dffffc0000000000 RSI=ffff88800d513350 RDI=ffff88801011cb48 RBP=ffff8880101271a8 RSP=ffff88801669fc68 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800d513180 R13=0000000000000000 R14=ffff88800e1f2e88 R15=ffff88800e1f2e40 RIP=ffffffff8184767e RFL=00000046 [---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 00007f0417e71900 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=00007f0418426650 CR3=000000000ef0a000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f7177cac000 CR3=000000000d614000 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=8c282d6fd0be3eb5e949004fd00d304e XMM02=2c67c8bc2e329bc3000000000011d218 XMM03=fb795ef6d657705600000000001218a8 XMM04=6e553998922cb1ed00000000000ae988 XMM05=19e9129bd510f2350000000000132a90 XMM06=4fda316b135da52b0000000000132918 XMM07=e042d86d42eb936e0000000000121b28 XMM08=8af2378a256c9f3f000000000011d278 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000