[ 24.384153] BUG: Bad rss-counter state mm:00000000cb529ad0 type:MM_FILEPAGES val:33 [ 24.385243] BUG: Bad rss-counter state mm:00000000cb529ad0 type:MM_ANONPAGES val:22 [ 24.527248] ================================================================== [ 24.528350] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.529152] Read of size 8 at addr ffff88801a3ea5c8 by task sshd/219 [ 24.529858] [ 24.530034] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.530711] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.531489] Call Trace: [ 24.531807] [ 24.532067] dump_stack_lvl+0x91/0xf0 [ 24.532488] print_report+0xcc/0x620 [ 24.532898] ? __virt_addr_valid+0x102/0x340 [ 24.533366] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.533890] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.534412] kasan_report+0xbe/0xf0 [ 24.534823] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.535352] vma_interval_tree_remove+0xc75/0xec0 [ 24.535867] vma_prepare+0xc54/0x11a0 [ 24.536283] __split_vma+0x5af/0x950 [ 24.536694] ? __pfx___split_vma+0x10/0x10 [ 24.537139] ? find_held_lock+0x2c/0x110 [ 24.537576] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.538049] ? lock_is_held_type+0x9f/0x120 [ 24.538504] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.539019] ? mtree_range_walk+0x632/0x900 [ 24.539485] ? mas_walk+0x5c7/0x7c0 [ 24.539883] do_vmi_munmap+0x1f1/0x2b0 [ 24.540325] mmap_region+0x1f9/0x2660 [ 24.540738] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.541175] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.541781] ? __pfx_lock_acquire+0x10/0x10 [ 24.542232] ? __pfx_mmap_region+0x10/0x10 [ 24.542682] ? security_mmap_addr+0x7d/0xa0 [ 24.543132] ? get_unmapped_area+0x1f5/0x3f0 [ 24.543598] do_mmap+0x854/0xf00 [ 24.543980] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.544406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.544884] ksys_mmap_pgoff+0x3af/0x500 [ 24.545321] do_syscall_64+0x3f/0x90 [ 24.545727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.546278] RIP: 0033:0x7f04b5b6fd82 [ 24.546666] 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 [ 24.548492] RSP: 002b:00007ffcb5714c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.549266] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04b5b6fd82 [ 24.549981] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04b4fa9000 [ 24.550709] RBP: 00007f04b4fa9000 R08: 0000000000000009 R09: 0000000000001000 [ 24.551434] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555668b6aec0 [ 24.552170] R13: 00007ffcb5714c40 R14: 00007ffcb5714c70 R15: 00007ffcb5714fd0 [ 24.552897] [ 24.553142] [ 24.553323] Allocated by task 209: [ 24.553685] kasan_save_stack+0x22/0x50 [ 24.554116] kasan_set_track+0x25/0x30 [ 24.554538] __kasan_slab_alloc+0x59/0x70 [ 24.554982] kmem_cache_alloc+0x16b/0x370 [ 24.555419] vm_area_dup+0x20/0x160 [ 24.555807] __split_vma+0x170/0x950 [ 24.556215] split_vma+0xc6/0x110 [ 24.556586] mprotect_fixup+0x8d2/0xb30 [ 24.557019] do_mprotect_pkey+0x87e/0xd40 [ 24.557460] __x64_sys_mprotect+0x78/0xc0 [ 24.557899] do_syscall_64+0x3f/0x90 [ 24.558296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.558847] [ 24.559026] Freed by task 209: [ 24.559354] kasan_save_stack+0x22/0x50 [ 24.559771] kasan_set_track+0x25/0x30 [ 24.560195] kasan_save_free_info+0x2b/0x50 [ 24.560635] __kasan_slab_free+0x10a/0x190 [ 24.561081] kmem_cache_free+0x10d/0x4d0 [ 24.561507] rcu_core+0x8c8/0x2860 [ 24.561894] __do_softirq+0x1b7/0x7d4 [ 24.562295] [ 24.562477] Last potentially related work creation: [ 24.562969] kasan_save_stack+0x22/0x50 [ 24.563397] __kasan_record_aux_stack+0x8e/0xa0 [ 24.563874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.564427] remove_vma+0x139/0x170 [ 24.564803] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.565268] do_vmi_munmap+0x1f1/0x2b0 [ 24.565684] __vm_munmap+0x138/0x3a0 [ 24.566080] __x64_sys_munmap+0x59/0x80 [ 24.566501] do_syscall_64+0x3f/0x90 [ 24.566899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.567438] [ 24.567618] The buggy address belongs to the object at ffff88801a3ea570 [ 24.567618] which belongs to the cache vm_area_struct of size 168 [ 24.568864] The buggy address is located 88 bytes inside of [ 24.568864] freed 168-byte region [ffff88801a3ea570, ffff88801a3ea618) [ 24.570058] [ 24.570236] The buggy address belongs to the physical page: [ 24.570793] page:000000001f5662d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3ea [ 24.571711] memcg:ffff88801bc82c01 [ 24.572081] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.572626] page_type: 0xffffffff() [ 24.573009] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.573789] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc82c01 [ 24.574545] page dumped because: kasan: bad access detected [ 24.575099] [ 24.575278] Memory state around the buggy address: [ 24.575766] ffff88801a3ea480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.576484] ffff88801a3ea500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 24.577204] >ffff88801a3ea580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.577919] ^ [ 24.578479] ffff88801a3ea600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.579193] ffff88801a3ea680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.579914] ================================================================== [ 24.580734] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.803691] BUG: Bad rss-counter state mm:0000000099b50c97 type:MM_FILEPAGES val:33 [ 26.804730] BUG: Bad rss-counter state mm:0000000099b50c97 type:MM_ANONPAGES val:22 [ 27.350957] BUG: Bad rss-counter state mm:00000000c94ff8b8 type:MM_FILEPAGES val:33 [ 27.352204] BUG: Bad rss-counter state mm:00000000c94ff8b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44575' (ECDSA) to the list of known hosts. 2023/06/19 13:20:17 fuzzer started 2023/06/19 13:20:18 dialing manager at localhost:44161 2023/06/19 13:20:18 checking machine... 2023/06/19 13:20:18 checking revisions... [ 27.982057] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:20:18 testing simple program... [ 28.034733] cgroup: Unknown subsys name 'net' [ 28.087281] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:20:17 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f70885fb8c0 CR3=000000000e258000 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=2037313a30323a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a30323a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888006acf059 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000000 RSI=ffff888006acf020 RDI=0000000000000001 RBP=0000000000000002 RSP=ffff888006acee80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff88801a38ca1c R12=0000000000000000 R13=0000000000000000 R14=dffffc0000000000 R15=ffff888006acef20 RIP=ffffffff84499637 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 00007fc2e95ed900 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=00007fc2e95cc020 CR3=000000000ea5e000 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=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