[ 60.395583] BUG: Bad rss-counter state mm:00000000ea2b65c8 type:MM_FILEPAGES val:33 [ 60.396421] BUG: Bad rss-counter state mm:00000000ea2b65c8 type:MM_ANONPAGES val:22 [ 60.499067] ================================================================== [ 60.500113] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.500842] Read of size 8 at addr ffff88800ececc20 by task sshd/221 [ 60.501565] [ 60.501734] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.502489] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.503270] Call Trace: [ 60.503519] [ 60.503739] dump_stack_lvl+0x91/0xf0 [ 60.504136] print_report+0xcc/0x620 [ 60.504510] ? __virt_addr_valid+0x102/0x340 [ 60.504944] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.505424] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.505904] kasan_report+0xbe/0xf0 [ 60.506277] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.506764] vma_interval_tree_remove+0xc75/0xec0 [ 60.507244] vma_prepare+0xc54/0x11a0 [ 60.507620] __split_vma+0x5af/0x950 [ 60.507993] ? __pfx___split_vma+0x10/0x10 [ 60.508407] ? find_held_lock+0x2c/0x110 [ 60.508812] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.509256] ? lock_is_held_type+0x9f/0x120 [ 60.509686] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.510163] ? mtree_range_walk+0x632/0x900 [ 60.510595] ? mas_walk+0x5c7/0x7c0 [ 60.510991] do_vmi_munmap+0x1f1/0x2b0 [ 60.511371] mmap_region+0x1f9/0x2660 [ 60.511747] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.512139] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.512535] ? __pfx_lock_acquire+0x10/0x10 [ 60.512831] ? __pfx_mmap_region+0x10/0x10 [ 60.513128] ? security_mmap_addr+0x7d/0xa0 [ 60.513423] ? get_unmapped_area+0x1f5/0x3f0 [ 60.513732] do_mmap+0x854/0xf00 [ 60.513977] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.514249] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.514557] ksys_mmap_pgoff+0x3af/0x500 [ 60.514839] do_syscall_64+0x3f/0x90 [ 60.515113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.515474] RIP: 0033:0x7f05bee2ad82 [ 60.515729] 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 [ 60.516911] RSP: 002b:00007ffe7b332748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.517417] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05bee2ad82 [ 60.517891] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05be264000 [ 60.518366] RBP: 00007f05be264000 R08: 0000000000000009 R09: 0000000000001000 [ 60.518837] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b003e81ec0 [ 60.519312] R13: 00007ffe7b332760 R14: 00007ffe7b332790 R15: 00007ffe7b332af0 [ 60.519790] [ 60.519952] [ 60.520072] Allocated by task 212: [ 60.520310] kasan_save_stack+0x22/0x50 [ 60.520588] kasan_set_track+0x25/0x30 [ 60.520858] __kasan_slab_alloc+0x59/0x70 [ 60.521151] kmem_cache_alloc+0x16b/0x370 [ 60.521438] vm_area_dup+0x20/0x160 [ 60.521691] __split_vma+0x170/0x950 [ 60.521952] split_vma+0xc6/0x110 [ 60.522195] mprotect_fixup+0x8d2/0xb30 [ 60.522474] do_mprotect_pkey+0x87e/0xd40 [ 60.522760] __x64_sys_mprotect+0x78/0xc0 [ 60.523065] do_syscall_64+0x3f/0x90 [ 60.523376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.523733] [ 60.523853] Freed by task 19: [ 60.524066] kasan_save_stack+0x22/0x50 [ 60.524345] kasan_set_track+0x25/0x30 [ 60.524617] kasan_save_free_info+0x2b/0x50 [ 60.524912] __kasan_slab_free+0x10a/0x190 [ 60.525207] kmem_cache_free+0x10d/0x4d0 [ 60.525492] rcu_core+0x8c8/0x2860 [ 60.525739] __do_softirq+0x1b7/0x7d4 [ 60.526009] [ 60.526129] Last potentially related work creation: [ 60.526455] kasan_save_stack+0x22/0x50 [ 60.526735] __kasan_record_aux_stack+0x8e/0xa0 [ 60.527052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.527404] remove_vma+0x139/0x170 [ 60.527667] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.527998] do_vmi_munmap+0x1f1/0x2b0 [ 60.528285] __vm_munmap+0x138/0x3a0 [ 60.528557] __x64_sys_munmap+0x59/0x80 [ 60.528844] do_syscall_64+0x3f/0x90 [ 60.529119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.529503] [ 60.529628] The buggy address belongs to the object at ffff88800ececbc8 [ 60.529628] which belongs to the cache vm_area_struct of size 168 [ 60.530504] The buggy address is located 88 bytes inside of [ 60.530504] freed 168-byte region [ffff88800ececbc8, ffff88800ececc70) [ 60.531362] [ 60.531489] The buggy address belongs to the physical page: [ 60.531886] page:00000000656fa1df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecec [ 60.532533] memcg:ffff88800ee20c01 [ 60.532791] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.533218] page_type: 0xffffffff() [ 60.533484] raw: 0100000000000200 ffff8880087a0c80 ffffea0000344280 dead000000000007 [ 60.534039] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee20c01 [ 60.534581] page dumped because: kasan: bad access detected [ 60.534996] [ 60.535119] Memory state around the buggy address: [ 60.535468] ffff88800ececb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.535980] ffff88800ececb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 60.536508] >ffff88800ececc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 60.537023] ^ [ 60.537350] ffff88800ececc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 60.537864] ffff88800ececd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 60.538385] ================================================================== [ 60.539019] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 62.500921] BUG: Bad rss-counter state mm:000000003fbb3a5e type:MM_FILEPAGES val:33 [ 62.501890] BUG: Bad rss-counter state mm:000000003fbb3a5e type:MM_ANONPAGES val:22 [ 62.952042] BUG: Bad rss-counter state mm:000000006daec76d type:MM_FILEPAGES val:33 [ 62.953004] BUG: Bad rss-counter state mm:000000006daec76d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26695' (ECDSA) to the list of known hosts. 2023/06/20 12:55:28 fuzzer started 2023/06/20 12:55:28 dialing manager at localhost:36067 2023/06/20 12:55:28 checking machine... 2023/06/20 12:55:28 checking revisions... [ 63.669619] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:55:29 testing simple program... [ 63.720591] cgroup: Unknown subsys name 'net' [ 63.772577] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:55:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110028a5f5d RSI=ffffffff846000aa RDI=ffff88801452fb58 RBP=ffff88801452fb28 RSP=ffff88801452fa80 R8 =0000000000000001 R9 =ffff88801452fad0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88801452fb58 R13=0000000000000000 R14=ffff888016ac9b40 R15=ffff888017c305f0 RIP=ffffffff813ad47f RFL=00000286 [--S--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 00007f4a4d5ec900 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=00007f4a4c9dbe50 CR3=000000000c746000 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=8006c76a90e2e30c00000000000ae988 XMM05=e1395adb0e83061c0000000000131970 XMM06=cc359426cadfe22800000000001303a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffff888014547798 RDX=1ffff110028a8edf RSI=1ffff110028a8ee1 RDI=ffff8880145476f8 RBP=dffffc0000000000 RSP=ffff888014547638 R8 =0000000000000000 R9 =0000000000000000 R10=ffff8880145476f8 R11=00000000000b6a61 R12=ffffed10028a8ee1 R13=ffffed10028a8ee0 R14=ffff888014547740 R15=ffff8880145476f8 RIP=ffffffff81130609 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 00007f77c0ff2900 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=00007ffc29c81000 CR3=00000000145cc000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000