syzkaller login: [ 37.847726] BUG: Bad rss-counter state mm:00000000ac06d5f6 type:MM_FILEPAGES val:33 [ 37.849075] BUG: Bad rss-counter state mm:00000000ac06d5f6 type:MM_ANONPAGES val:22 [ 37.882966] ================================================================== [ 37.883805] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.884565] Read of size 8 at addr ffff88800db3d798 by task sshd/220 [ 37.885194] [ 37.885373] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.886076] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.886906] Call Trace: [ 37.887166] [ 37.887398] dump_stack_lvl+0x91/0xf0 [ 37.887810] print_report+0xcc/0x620 [ 37.888208] ? __virt_addr_valid+0x102/0x340 [ 37.888655] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.889163] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.889669] kasan_report+0xbe/0xf0 [ 37.890066] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.890589] vma_interval_tree_remove+0xc75/0xec0 [ 37.891095] vma_prepare+0xc54/0x11a0 [ 37.891492] __split_vma+0x5af/0x950 [ 37.891896] ? __pfx___split_vma+0x10/0x10 [ 37.892334] ? find_held_lock+0x2c/0x110 [ 37.892756] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.893224] ? lock_is_held_type+0x9f/0x120 [ 37.893661] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.894349] ? mtree_range_walk+0x632/0x900 [ 37.894830] ? mas_walk+0x5c7/0x7c0 [ 37.895217] do_vmi_munmap+0x1f1/0x2b0 [ 37.895621] mmap_region+0x1f9/0x2660 [ 37.896038] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.896470] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.897059] ? __pfx_lock_acquire+0x10/0x10 [ 37.897499] ? __pfx_mmap_region+0x10/0x10 [ 37.897944] ? security_mmap_addr+0x7d/0xa0 [ 37.898379] ? get_unmapped_area+0x1f5/0x3f0 [ 37.898862] do_mmap+0x854/0xf00 [ 37.899232] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.899639] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.900105] ksys_mmap_pgoff+0x3af/0x500 [ 37.900520] do_syscall_64+0x3f/0x90 [ 37.900929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.901456] RIP: 0033:0x7f2234412d82 [ 37.901837] 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 [ 37.903590] RSP: 002b:00007ffd4c5b1e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.904345] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2234412d82 [ 37.905043] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f223384c000 [ 37.905727] RBP: 00007f223384c000 R08: 0000000000000009 R09: 0000000000001000 [ 37.906440] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555640e44ec0 [ 37.907149] R13: 00007ffd4c5b1e50 R14: 00007ffd4c5b1e80 R15: 00007ffd4c5b21e0 [ 37.907856] [ 37.908091] [ 37.908264] Allocated by task 213: [ 37.908609] kasan_save_stack+0x22/0x50 [ 37.909034] kasan_set_track+0x25/0x30 [ 37.909435] __kasan_slab_alloc+0x59/0x70 [ 37.909867] kmem_cache_alloc+0x16b/0x370 [ 37.910280] vm_area_dup+0x20/0x160 [ 37.910658] __split_vma+0x170/0x950 [ 37.911052] split_vma+0xc6/0x110 [ 37.911408] mprotect_fixup+0x8d2/0xb30 [ 37.911825] do_mprotect_pkey+0x87e/0xd40 [ 37.912249] __x64_sys_mprotect+0x78/0xc0 [ 37.912667] do_syscall_64+0x3f/0x90 [ 37.913057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.913575] [ 37.913749] Freed by task 213: [ 37.914075] kasan_save_stack+0x22/0x50 [ 37.914496] kasan_set_track+0x25/0x30 [ 37.914902] kasan_save_free_info+0x2b/0x50 [ 37.915332] __kasan_slab_free+0x10a/0x190 [ 37.915764] kmem_cache_free+0x10d/0x4d0 [ 37.916199] rcu_core+0x8c8/0x2860 [ 37.916565] __do_softirq+0x1b7/0x7d4 [ 37.916959] [ 37.917144] Last potentially related work creation: [ 37.917643] kasan_save_stack+0x22/0x50 [ 37.918056] __kasan_record_aux_stack+0x8e/0xa0 [ 37.918532] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.919061] remove_vma+0x139/0x170 [ 37.919429] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.919891] do_vmi_munmap+0x1f1/0x2b0 [ 37.920284] __vm_munmap+0x138/0x3a0 [ 37.920658] __x64_sys_munmap+0x59/0x80 [ 37.921071] do_syscall_64+0x3f/0x90 [ 37.921452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.921982] [ 37.922153] Second to last potentially related work creation: [ 37.922810] kasan_save_stack+0x22/0x50 [ 37.923259] __kasan_record_aux_stack+0x8e/0xa0 [ 37.923718] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.924247] remove_vma+0x139/0x170 [ 37.924605] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.925072] do_vmi_munmap+0x1f1/0x2b0 [ 37.925526] mmap_region+0x1f9/0x2660 [ 37.926000] do_mmap+0x854/0xf00 [ 37.926434] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.926920] ksys_mmap_pgoff+0x3af/0x500 [ 37.927411] do_syscall_64+0x3f/0x90 [ 37.927862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.928484] [ 37.928689] The buggy address belongs to the object at ffff88800db3d740 [ 37.928689] which belongs to the cache vm_area_struct of size 168 [ 37.930119] The buggy address is located 88 bytes inside of [ 37.930119] freed 168-byte region [ffff88800db3d740, ffff88800db3d7e8) [ 37.931520] [ 37.931736] The buggy address belongs to the physical page: [ 37.932375] page:000000006f9491e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb3d [ 37.933436] memcg:ffff88800ec65301 [ 37.933853] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.934501] page_type: 0xffffffff() [ 37.934946] raw: 0100000000000200 ffff88800879fc80 ffffea00003b84c0 dead000000000006 [ 37.935835] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec65301 [ 37.936580] page dumped because: kasan: bad access detected [ 37.937153] [ 37.937331] Memory state around the buggy address: [ 37.937814] ffff88800db3d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.938528] ffff88800db3d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.939326] >ffff88800db3d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.940011] ^ [ 37.940402] ffff88800db3d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 37.941089] ffff88800db3d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 37.941761] ================================================================== [ 37.942711] Disabling lock debugging due to kernel taint [ 39.958555] BUG: Bad rss-counter state mm:00000000854fd6a4 type:MM_FILEPAGES val:33 [ 39.959540] BUG: Bad rss-counter state mm:00000000854fd6a4 type:MM_ANONPAGES val:22 [ 40.532533] BUG: Bad rss-counter state mm:000000005c5d4b0c type:MM_FILEPAGES val:33 [ 40.533557] BUG: Bad rss-counter state mm:000000005c5d4b0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32705' (ECDSA) to the list of known hosts. 2023/06/19 19:53:09 fuzzer started 2023/06/19 19:53:09 dialing manager at localhost:44161 2023/06/19 19:53:09 checking machine... 2023/06/19 19:53:09 checking revisions... [ 41.191344] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:53:09 testing simple program... [ 41.237465] cgroup: Unknown subsys name 'net' [ 41.281633] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:53:01 Registers: info registers vcpu 0 RAX=0000000000000019 RBX=1ffff11002feaefe RCX=ffffffff81c5f455 RDX=ffffed1002bcb1cb RSI=0000000000000004 RDI=ffff888015e58e54 RBP=ffff88800fede000 RSP=ffff888017f577c0 R8 =0000000000000001 R9 =ffffed1002bcb1ca R10=ffff888015e58e57 R11=00000000000b6996 R12=0000000000000003 R13=ffff888015e58d80 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81c5f461 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 00007f5f1bdeb700 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=000055d03ec8e318 CR3=000000001a468000 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=2039303a33353a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a33353a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9e135f RSI=ffffffff818a35ce RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000237bc R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888010338000 R15=ffff88806cf09a98 RIP=ffffffff81130682 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 00007f6ba85f6900 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=00007f4293b57650 CR3=000000000ca2a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9510922f14bc0a8800000000000ae988 XMM05=9ed2fe709c0e8a5d0000000000135d28 XMM06=19e9129bd510f2350000000000134c18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000