syzkaller login: [ 34.689277] BUG: Bad rss-counter state mm:00000000193cb259 type:MM_FILEPAGES val:33 [ 34.691130] BUG: Bad rss-counter state mm:00000000193cb259 type:MM_ANONPAGES val:22 [ 34.871658] ================================================================== [ 34.872619] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.873583] Read of size 8 at addr ffff88800fd33c20 by task sshd/221 [ 34.874457] [ 34.874709] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.875601] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.876623] Call Trace: [ 34.876953] [ 34.877255] dump_stack_lvl+0x91/0xf0 [ 34.877760] print_report+0xcc/0x620 [ 34.878257] ? __virt_addr_valid+0x102/0x340 [ 34.878826] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.879462] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.880184] kasan_report+0xbe/0xf0 [ 34.880694] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.881349] vma_interval_tree_remove+0xc75/0xec0 [ 34.881996] vma_prepare+0xc54/0x11a0 [ 34.882505] __split_vma+0x5af/0x950 [ 34.883013] ? __pfx___split_vma+0x10/0x10 [ 34.883587] ? find_held_lock+0x2c/0x110 [ 34.884152] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.884773] ? lock_is_held_type+0x9f/0x120 [ 34.885355] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.886007] ? mtree_range_walk+0x632/0x900 [ 34.886599] ? mas_walk+0x5c7/0x7c0 [ 34.887109] do_vmi_munmap+0x1f1/0x2b0 [ 34.887644] mmap_region+0x1f9/0x2660 [ 34.888165] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.888732] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.889496] ? __pfx_lock_acquire+0x10/0x10 [ 34.890094] ? __pfx_mmap_region+0x10/0x10 [ 34.890670] ? security_mmap_addr+0x7d/0xa0 [ 34.891251] ? get_unmapped_area+0x1f5/0x3f0 [ 34.891839] do_mmap+0x854/0xf00 [ 34.892318] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.892861] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.893468] ksys_mmap_pgoff+0x3af/0x500 [ 34.894018] do_syscall_64+0x3f/0x90 [ 34.894533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.895230] RIP: 0033:0x7f8fb0e48d82 [ 34.895728] 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 [ 34.898042] RSP: 002b:00007ffc2ef219f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.899022] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8fb0e48d82 [ 34.899943] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8fb0282000 [ 34.900881] RBP: 00007f8fb0282000 R08: 0000000000000009 R09: 0000000000001000 [ 34.901792] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d082dff70 [ 34.902707] R13: 00007ffc2ef21a10 R14: 00007ffc2ef21a40 R15: 00007ffc2ef21da0 [ 34.903758] [ 34.904076] [ 34.904309] Allocated by task 213: [ 34.904784] kasan_save_stack+0x22/0x50 [ 34.905327] kasan_set_track+0x25/0x30 [ 34.905857] __kasan_slab_alloc+0x59/0x70 [ 34.906420] kmem_cache_alloc+0x16b/0x370 [ 34.906986] vm_area_dup+0x20/0x160 [ 34.907477] __split_vma+0x170/0x950 [ 34.907981] split_vma+0xc6/0x110 [ 34.908452] mprotect_fixup+0x8d2/0xb30 [ 34.909006] do_mprotect_pkey+0x87e/0xd40 [ 34.909564] __x64_sys_mprotect+0x78/0xc0 [ 34.910124] do_syscall_64+0x3f/0x90 [ 34.910628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.911308] [ 34.911536] Freed by task 213: [ 34.911952] kasan_save_stack+0x22/0x50 [ 34.912492] kasan_set_track+0x25/0x30 [ 34.913023] kasan_save_free_info+0x2b/0x50 [ 34.913594] __kasan_slab_free+0x10a/0x190 [ 34.914164] kmem_cache_free+0x10d/0x4d0 [ 34.914710] rcu_core+0x8c8/0x2860 [ 34.915189] __do_softirq+0x1b7/0x7d4 [ 34.915696] [ 34.915925] Last potentially related work creation: [ 34.916554] kasan_save_stack+0x22/0x50 [ 34.917109] __kasan_record_aux_stack+0x8e/0xa0 [ 34.917728] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.918409] remove_vma+0x139/0x170 [ 34.918898] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.919494] do_vmi_munmap+0x1f1/0x2b0 [ 34.920016] __vm_munmap+0x138/0x3a0 [ 34.920519] __x64_sys_munmap+0x59/0x80 [ 34.921059] do_syscall_64+0x3f/0x90 [ 34.921569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.922253] [ 34.922482] The buggy address belongs to the object at ffff88800fd33bc8 [ 34.922482] which belongs to the cache vm_area_struct of size 168 [ 34.924060] The buggy address is located 88 bytes inside of [ 34.924060] freed 168-byte region [ffff88800fd33bc8, ffff88800fd33c70) [ 34.925570] [ 34.925807] The buggy address belongs to the physical page: [ 34.926510] page:0000000044b87adb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd33 [ 34.927664] memcg:ffff888018240501 [ 34.928123] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.928818] page_type: 0xffffffff() [ 34.929297] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.930280] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018240501 [ 34.931245] page dumped because: kasan: bad access detected [ 34.931947] [ 34.932180] Memory state around the buggy address: [ 34.932807] ffff88800fd33b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.933719] ffff88800fd33b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.934645] >ffff88800fd33c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.935554] ^ [ 34.936115] ffff88800fd33c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.937030] ffff88800fd33d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.937933] ================================================================== [ 34.939269] Disabling lock debugging due to kernel taint [ 37.559151] BUG: Bad rss-counter state mm:000000003bcbae18 type:MM_FILEPAGES val:33 [ 37.560376] BUG: Bad rss-counter state mm:000000003bcbae18 type:MM_ANONPAGES val:22 [ 37.969782] BUG: Bad rss-counter state mm:00000000c877520c type:MM_FILEPAGES val:33 [ 37.970870] BUG: Bad rss-counter state mm:00000000c877520c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10798' (ECDSA) to the list of known hosts. 2023/06/19 17:31:46 fuzzer started 2023/06/19 17:31:46 dialing manager at localhost:44161 2023/06/19 17:31:46 checking machine... 2023/06/19 17:31:46 checking revisions... [ 38.666709] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:31:47 testing simple program... [ 38.723797] cgroup: Unknown subsys name 'net' [ 38.793323] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:31:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff84530004 RDX=0000000000035301 RSI=0000000000035300 RDI=ffffffff865bc7c4 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5bb5 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff811307e3 RFL=00000213 [----A-C] 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 00007f83da0fe900 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=00007f83da0c8008 CR3=0000000016e4a000 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=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 info registers vcpu 1 RAX=ffffffff844bfa24 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001953e18 RSI=ffff88800ca9f4b8 RDI=ffffffff844bfa24 RBP=ffff88800ca9f100 RSP=ffff88800ca9f068 R8 =0000000000000001 R9 =ffff88800ca9f0a8 R10=0000000000038001 R11=00000000000b3b3c R12=ffff88800ca9f130 R13=0000000000000000 R14=ffff8880134c51c0 R15=0000000000002800 RIP=ffffffff810bd06d 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 00007f83da0fe900 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=00007f83da0c3008 CR3=0000000016e4a000 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