syzkaller login: [ 35.722320] BUG: Bad rss-counter state mm:00000000ec7d0de2 type:MM_FILEPAGES val:33 [ 35.723540] BUG: Bad rss-counter state mm:00000000ec7d0de2 type:MM_ANONPAGES val:22 [ 35.865754] ================================================================== [ 35.866676] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.867618] Read of size 8 at addr ffff888016bbb3f8 by task sshd/219 [ 35.868392] [ 35.868717] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.869582] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.870568] Call Trace: [ 35.870917] [ 35.871212] dump_stack_lvl+0x91/0xf0 [ 35.871711] print_report+0xcc/0x620 [ 35.872210] ? __virt_addr_valid+0x102/0x340 [ 35.872780] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.873411] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.874030] kasan_report+0xbe/0xf0 [ 35.874520] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.875152] vma_interval_tree_remove+0xc75/0xec0 [ 35.875765] vma_prepare+0xc54/0x11a0 [ 35.876272] __split_vma+0x5af/0x950 [ 35.876741] ? __pfx___split_vma+0x10/0x10 [ 35.877267] ? find_held_lock+0x2c/0x110 [ 35.877791] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.878374] ? lock_is_held_type+0x9f/0x120 [ 35.878918] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.879524] ? mtree_range_walk+0x632/0x900 [ 35.880074] ? mas_walk+0x5c7/0x7c0 [ 35.880543] do_vmi_munmap+0x1f1/0x2b0 [ 35.881043] mmap_region+0x1f9/0x2660 [ 35.881526] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.882033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.882757] ? __pfx_lock_acquire+0x10/0x10 [ 35.883287] ? __pfx_mmap_region+0x10/0x10 [ 35.883826] ? security_mmap_addr+0x7d/0xa0 [ 35.884381] ? get_unmapped_area+0x1f5/0x3f0 [ 35.884932] do_mmap+0x854/0xf00 [ 35.885368] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.885869] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.886426] ksys_mmap_pgoff+0x3af/0x500 [ 35.886934] do_syscall_64+0x3f/0x90 [ 35.887407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.888068] RIP: 0033:0x7fa667b41d82 [ 35.888524] 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 [ 35.890645] RSP: 002b:00007ffe483b12f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.891553] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa667b41d82 [ 35.892404] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa666f7b000 [ 35.893241] RBP: 00007fa666f7b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.894104] R10: 0000000000000812 R11: 0000000000000206 R12: 000056348a7f5ec0 [ 35.894950] R13: 00007ffe483b1310 R14: 00007ffe483b1340 R15: 00007ffe483b16a0 [ 35.895805] [ 35.896114] [ 35.896329] Allocated by task 212: [ 35.896764] kasan_save_stack+0x22/0x50 [ 35.897264] kasan_set_track+0x25/0x30 [ 35.897761] __kasan_slab_alloc+0x59/0x70 [ 35.898291] kmem_cache_alloc+0x16b/0x370 [ 35.898803] vm_area_dup+0x20/0x160 [ 35.899260] __split_vma+0x170/0x950 [ 35.899730] split_vma+0xc6/0x110 [ 35.900180] mprotect_fixup+0x8d2/0xb30 [ 35.900682] do_mprotect_pkey+0x87e/0xd40 [ 35.901206] __x64_sys_mprotect+0x78/0xc0 [ 35.901727] do_syscall_64+0x3f/0x90 [ 35.902210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.902857] [ 35.903075] Freed by task 212: [ 35.903474] kasan_save_stack+0x22/0x50 [ 35.903985] kasan_set_track+0x25/0x30 [ 35.904498] kasan_save_free_info+0x2b/0x50 [ 35.905030] __kasan_slab_free+0x10a/0x190 [ 35.905561] kmem_cache_free+0x10d/0x4d0 [ 35.906066] rcu_core+0x8c8/0x2860 [ 35.906515] __do_softirq+0x1b7/0x7d4 [ 35.907002] [ 35.907219] Last potentially related work creation: [ 35.907812] kasan_save_stack+0x22/0x50 [ 35.908319] __kasan_record_aux_stack+0x8e/0xa0 [ 35.908890] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.909537] remove_vma+0x139/0x170 [ 35.910008] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.910564] do_vmi_munmap+0x1f1/0x2b0 [ 35.911045] __vm_munmap+0x138/0x3a0 [ 35.911518] __x64_sys_munmap+0x59/0x80 [ 35.912013] do_syscall_64+0x3f/0x90 [ 35.912497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.913142] [ 35.913363] The buggy address belongs to the object at ffff888016bbb3a0 [ 35.913363] which belongs to the cache vm_area_struct of size 168 [ 35.914835] The buggy address is located 88 bytes inside of [ 35.914835] freed 168-byte region [ffff888016bbb3a0, ffff888016bbb448) [ 35.916236] [ 35.916450] The buggy address belongs to the physical page: [ 35.917102] page:000000001c49208e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16bbb [ 35.918187] memcg:ffff888019dab301 [ 35.918618] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.919271] page_type: 0xffffffff() [ 35.919726] raw: 0100000000000200 ffff88800879fc80 ffffea00003778c0 dead000000000002 [ 35.920649] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dab301 [ 35.921554] page dumped because: kasan: bad access detected [ 35.922214] [ 35.922429] Memory state around the buggy address: [ 35.923020] ffff888016bbb280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.923880] ffff888016bbb300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.924742] >ffff888016bbb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.925591] ^ [ 35.926440] ffff888016bbb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.927306] ffff888016bbb480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.928175] ================================================================== [ 35.929131] Disabling lock debugging due to kernel taint [ 37.871539] BUG: Bad rss-counter state mm:00000000e23f9546 type:MM_FILEPAGES val:33 [ 37.872682] BUG: Bad rss-counter state mm:00000000e23f9546 type:MM_ANONPAGES val:22 [ 38.391378] BUG: Bad rss-counter state mm:00000000b5389e01 type:MM_FILEPAGES val:33 [ 38.392780] BUG: Bad rss-counter state mm:00000000b5389e01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36687' (ECDSA) to the list of known hosts. 2023/06/19 21:50:01 fuzzer started 2023/06/19 21:50:01 dialing manager at localhost:44161 2023/06/19 21:50:01 checking machine... 2023/06/19 21:50:01 checking revisions... [ 39.036802] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:50:01 testing simple program... [ 39.083522] cgroup: Unknown subsys name 'net' [ 39.139586] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:49:55 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000007 RCX=0000000080000000 RDX=1ffff11001db825b RSI=ffffffff8113b049 RDI=ffff88800edc12d8 RBP=ffff88800edc12b8 RSP=ffff88800cbcfe90 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000002 R13=0000000000100173 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c07f1 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1734356900 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=00007fff2e4f863c CR3=000000000cbdc000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fba17d86040 CR3=000000000ca1a000 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=6af1cb4f209a6197624d1359a368eddf XMM02=000000000011cb18ec2efd57dc4c00df XMM03=0000000000123f80348a274d4896dc18 XMM04=7af85005902f781700000000000ae988 XMM05=dfcdbad4f1609c370000000000133b30 XMM06=51a1b2bcead20fcb0000000000132998 XMM07=e042d86d42eb936e0000000000124200 XMM08=348a274d4896dc18000000000011cb78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000