syzkaller login: [ 38.745193] BUG: Bad rss-counter state mm:00000000468310c6 type:MM_FILEPAGES val:33 [ 38.746438] BUG: Bad rss-counter state mm:00000000468310c6 type:MM_ANONPAGES val:22 [ 38.914128] ================================================================== [ 38.915106] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.916085] Read of size 8 at addr ffff88801810f798 by task sshd/226 [ 38.916879] [ 38.917095] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.918091] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.919118] Call Trace: [ 38.919460] [ 38.919745] dump_stack_lvl+0x91/0xf0 [ 38.920239] print_report+0xcc/0x620 [ 38.920726] ? __virt_addr_valid+0x102/0x340 [ 38.921278] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.921898] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.922552] kasan_report+0xbe/0xf0 [ 38.923072] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.923745] vma_interval_tree_remove+0xc75/0xec0 [ 38.924393] vma_prepare+0xc54/0x11a0 [ 38.924891] __split_vma+0x5af/0x950 [ 38.925386] ? __pfx___split_vma+0x10/0x10 [ 38.925943] ? find_held_lock+0x2c/0x110 [ 38.926475] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.927077] ? lock_is_held_type+0x9f/0x120 [ 38.927639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.928273] ? mtree_range_walk+0x632/0x900 [ 38.928840] ? mas_walk+0x5c7/0x7c0 [ 38.929332] do_vmi_munmap+0x1f1/0x2b0 [ 38.929802] mmap_region+0x1f9/0x2660 [ 38.930273] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.930828] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.931565] ? __pfx_lock_acquire+0x10/0x10 [ 38.932122] ? __pfx_mmap_region+0x10/0x10 [ 38.932684] ? security_mmap_addr+0x7d/0xa0 [ 38.933219] ? get_unmapped_area+0x1f5/0x3f0 [ 38.933774] do_mmap+0x854/0xf00 [ 38.934221] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.934742] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.935308] ksys_mmap_pgoff+0x3af/0x500 [ 38.935814] do_syscall_64+0x3f/0x90 [ 38.936293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.936940] RIP: 0033:0x7fc061a7ad82 [ 38.937397] 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 [ 38.939583] RSP: 002b:00007ffeb3f3f538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.940509] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc061a7ad82 [ 38.941358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc060eb4000 [ 38.942218] RBP: 00007fc060eb4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.943084] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a20fcc5ec0 [ 38.943926] R13: 00007ffeb3f3f550 R14: 00007ffeb3f3f580 R15: 00007ffeb3f3f8e0 [ 38.944786] [ 38.945085] [ 38.945308] Allocated by task 219: [ 38.945755] kasan_save_stack+0x22/0x50 [ 38.946296] kasan_set_track+0x25/0x30 [ 38.946809] __kasan_slab_alloc+0x59/0x70 [ 38.947358] kmem_cache_alloc+0x16b/0x370 [ 38.947892] vm_area_dup+0x20/0x160 [ 38.948348] __split_vma+0x170/0x950 [ 38.948822] split_vma+0xc6/0x110 [ 38.949265] mprotect_fixup+0x8d2/0xb30 [ 38.949773] do_mprotect_pkey+0x87e/0xd40 [ 38.950310] __x64_sys_mprotect+0x78/0xc0 [ 38.950845] do_syscall_64+0x3f/0x90 [ 38.951330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.951983] [ 38.952199] Freed by task 219: [ 38.952592] kasan_save_stack+0x22/0x50 [ 38.953096] kasan_set_track+0x25/0x30 [ 38.953589] kasan_save_free_info+0x2b/0x50 [ 38.954122] __kasan_slab_free+0x10a/0x190 [ 38.954673] kmem_cache_free+0x10d/0x4d0 [ 38.955187] rcu_core+0x8c8/0x2860 [ 38.955638] __do_softirq+0x1b7/0x7d4 [ 38.956119] [ 38.956334] Last potentially related work creation: [ 38.956921] kasan_save_stack+0x22/0x50 [ 38.957423] __kasan_record_aux_stack+0x8e/0xa0 [ 38.958006] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.958680] remove_vma+0x139/0x170 [ 38.959141] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.959726] do_vmi_munmap+0x1f1/0x2b0 [ 38.960228] __vm_munmap+0x138/0x3a0 [ 38.960696] __x64_sys_munmap+0x59/0x80 [ 38.961197] do_syscall_64+0x3f/0x90 [ 38.961683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.962306] [ 38.962511] The buggy address belongs to the object at ffff88801810f740 [ 38.962511] which belongs to the cache vm_area_struct of size 168 [ 38.963982] The buggy address is located 88 bytes inside of [ 38.963982] freed 168-byte region [ffff88801810f740, ffff88801810f7e8) [ 38.965417] [ 38.965634] The buggy address belongs to the physical page: [ 38.966304] page:000000004cd4db46 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1810f [ 38.967431] memcg:ffff88801836e601 [ 38.967859] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.968500] page_type: 0xffffffff() [ 38.968954] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.969880] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801836e601 [ 38.970832] page dumped because: kasan: bad access detected [ 38.971507] [ 38.971722] Memory state around the buggy address: [ 38.972308] ffff88801810f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.973172] ffff88801810f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.974025] >ffff88801810f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.974897] ^ [ 38.975392] ffff88801810f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.976244] ffff88801810f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.977123] ================================================================== [ 38.978154] Disabling lock debugging due to kernel taint [ 41.071955] BUG: Bad rss-counter state mm:000000002cc8bace type:MM_FILEPAGES val:33 [ 41.073237] BUG: Bad rss-counter state mm:000000002cc8bace type:MM_ANONPAGES val:22 [ 41.490166] BUG: Bad rss-counter state mm:00000000fff04256 type:MM_FILEPAGES val:33 [ 41.491365] BUG: Bad rss-counter state mm:00000000fff04256 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63441' (ECDSA) to the list of known hosts. 2023/06/20 15:49:15 fuzzer started 2023/06/20 15:49:15 dialing manager at localhost:36067 2023/06/20 15:49:15 checking machine... 2023/06/20 15:49:15 checking revisions... [ 42.217156] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:49:15 testing simple program... [ 42.271941] cgroup: Unknown subsys name 'net' [ 42.325353] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:49:15 Registers: info registers vcpu 0 RAX=1ffffffff0a57f34 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf9a0 RBP=ffff8880143afd28 RSP=ffff8880143afc60 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=00000000000000ac R13=1ffff11002875fa7 R14=00000000000000ac R15=ffffc90000659048 RIP=ffffffff815a2a0f 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 00007fbc85973900 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=00007fd807219650 CR3=000000000d4ac000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0f9b287633048f5000000000000ae988 XMM05=eaccb2255c737fb70000000000132410 XMM06=6860aeb314f8829d0000000000130f38 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffe459a9418 CR3=0000000016912000 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=2035313a39343a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a39343a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000