syzkaller login: [ 37.624733] BUG: Bad rss-counter state mm:00000000660abff6 type:MM_FILEPAGES val:33 [ 37.625800] BUG: Bad rss-counter state mm:00000000660abff6 type:MM_ANONPAGES val:22 [ 37.794481] ================================================================== [ 37.795427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.796399] Read of size 8 at addr ffff8880146206b0 by task sshd/221 [ 37.797181] [ 37.797415] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.798444] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.799445] Call Trace: [ 37.799766] [ 37.800055] dump_stack_lvl+0x91/0xf0 [ 37.800574] print_report+0xcc/0x620 [ 37.801060] ? __virt_addr_valid+0x102/0x340 [ 37.801649] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.802287] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.802905] kasan_report+0xbe/0xf0 [ 37.803395] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.804018] vma_interval_tree_remove+0xc75/0xec0 [ 37.804648] vma_prepare+0xc54/0x11a0 [ 37.805153] __split_vma+0x5af/0x950 [ 37.805638] ? __pfx___split_vma+0x10/0x10 [ 37.806181] ? find_held_lock+0x2c/0x110 [ 37.806703] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.807278] ? lock_is_held_type+0x9f/0x120 [ 37.807821] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.808456] ? mtree_range_walk+0x632/0x900 [ 37.809007] ? mas_walk+0x5c7/0x7c0 [ 37.809506] do_vmi_munmap+0x1f1/0x2b0 [ 37.810006] mmap_region+0x1f9/0x2660 [ 37.810498] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.811010] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.811734] ? __pfx_lock_acquire+0x10/0x10 [ 37.812303] ? __pfx_mmap_region+0x10/0x10 [ 37.812838] ? security_mmap_addr+0x7d/0xa0 [ 37.813417] ? get_unmapped_area+0x1f5/0x3f0 [ 37.813969] do_mmap+0x854/0xf00 [ 37.814425] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.814929] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.815504] ksys_mmap_pgoff+0x3af/0x500 [ 37.816018] do_syscall_64+0x3f/0x90 [ 37.816521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.817179] RIP: 0033:0x7fc083400d82 [ 37.817652] 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 [ 37.819798] RSP: 002b:00007ffe526305f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.820731] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc083400d82 [ 37.821608] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc08283a000 [ 37.822474] RBP: 00007fc08283a000 R08: 0000000000000009 R09: 0000000000001000 [ 37.823346] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d0b19a980 [ 37.824225] R13: 00007ffe52630610 R14: 00007ffe52630640 R15: 00007ffe526309a0 [ 37.825089] [ 37.825408] [ 37.825626] Allocated by task 214: [ 37.826060] kasan_save_stack+0x22/0x50 [ 37.826582] kasan_set_track+0x25/0x30 [ 37.827088] __kasan_slab_alloc+0x59/0x70 [ 37.827612] kmem_cache_alloc+0x16b/0x370 [ 37.828166] vm_area_dup+0x20/0x160 [ 37.828621] __split_vma+0x170/0x950 [ 37.829111] split_vma+0xc6/0x110 [ 37.829577] mprotect_fixup+0x8d2/0xb30 [ 37.830095] do_mprotect_pkey+0x87e/0xd40 [ 37.830627] __x64_sys_mprotect+0x78/0xc0 [ 37.831177] do_syscall_64+0x3f/0x90 [ 37.831657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.832335] [ 37.832552] Freed by task 214: [ 37.832959] kasan_save_stack+0x22/0x50 [ 37.833504] kasan_set_track+0x25/0x30 [ 37.834017] kasan_save_free_info+0x2b/0x50 [ 37.834566] __kasan_slab_free+0x10a/0x190 [ 37.835120] kmem_cache_free+0x10d/0x4d0 [ 37.835640] rcu_core+0x8c8/0x2860 [ 37.836103] __do_softirq+0x1b7/0x7d4 [ 37.836598] [ 37.836815] Last potentially related work creation: [ 37.837438] kasan_save_stack+0x22/0x50 [ 37.837950] __kasan_record_aux_stack+0x8e/0xa0 [ 37.838535] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.839278] remove_vma+0x139/0x170 [ 37.839742] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.840328] do_vmi_munmap+0x1f1/0x2b0 [ 37.840821] __vm_munmap+0x138/0x3a0 [ 37.841300] __x64_sys_munmap+0x59/0x80 [ 37.841810] do_syscall_64+0x3f/0x90 [ 37.842302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.842953] [ 37.843183] Second to last potentially related work creation: [ 37.843862] kasan_save_stack+0x22/0x50 [ 37.844392] __kasan_record_aux_stack+0x8e/0xa0 [ 37.844970] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.845651] remove_vma+0x139/0x170 [ 37.846121] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.846687] do_vmi_munmap+0x1f1/0x2b0 [ 37.847192] mmap_region+0x1f9/0x2660 [ 37.847685] do_mmap+0x854/0xf00 [ 37.848142] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.848633] ksys_mmap_pgoff+0x3af/0x500 [ 37.849156] do_syscall_64+0x3f/0x90 [ 37.849645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.850294] [ 37.850518] The buggy address belongs to the object at ffff888014620658 [ 37.850518] which belongs to the cache vm_area_struct of size 168 [ 37.852531] The buggy address is located 88 bytes inside of [ 37.852531] freed 168-byte region [ffff888014620658, ffff888014620700) [ 37.854246] [ 37.854516] The buggy address belongs to the physical page: [ 37.855217] page:00000000b6c62f9f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14620 [ 37.856401] memcg:ffff888016dff101 [ 37.856836] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.857563] page_type: 0xffffffff() [ 37.858023] raw: 0100000000000200 ffff88800879fc80 ffffea0000518880 dead000000000007 [ 37.858956] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016dff101 [ 37.859896] page dumped because: kasan: bad access detected [ 37.860576] [ 37.860794] Memory state around the buggy address: [ 37.861415] ffff888014620580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.862290] ffff888014620600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 37.863183] >ffff888014620680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.864030] ^ [ 37.864630] ffff888014620700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.865519] ffff888014620780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.866400] ================================================================== [ 37.867510] Disabling lock debugging due to kernel taint [ 39.859920] BUG: Bad rss-counter state mm:000000007994a1c9 type:MM_FILEPAGES val:33 [ 39.861270] BUG: Bad rss-counter state mm:000000007994a1c9 type:MM_ANONPAGES val:22 [ 40.303985] BUG: Bad rss-counter state mm:0000000014532b05 type:MM_FILEPAGES val:33 [ 40.305121] BUG: Bad rss-counter state mm:0000000014532b05 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43712' (ECDSA) to the list of known hosts. 2023/06/20 00:58:35 fuzzer started 2023/06/20 00:58:36 dialing manager at localhost:44161 2023/06/20 00:58:36 checking machine... 2023/06/20 00:58:36 checking revisions... [ 41.031668] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:58:36 testing simple program... [ 41.077169] cgroup: Unknown subsys name 'net' [ 41.112464] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:58:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001fd0e55 RSI=ffff88800fe87628 RDI=ffff88800fe872a8 RBP=0000000000002000 RSP=ffff88800fe871e8 R8 =0000000000000001 R9 =ffff88800fe87298 R10=0000000000038001 R11=0000000000020c48 R12=ffff88800fe872b8 R13=ffff88800fe872a0 R14=ffff88800fe87628 R15=ffff88800fe87258 RIP=ffffffff81131266 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 00007f75101d7900 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=00007f751078e618 CR3=000000000cf74000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c58400 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=00007f0720cd78a0 CR3=0000000009526000 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=f027af74008ba8b1da482acef8b672da XMM02=000000000011d6e8ec2efd57dc4c00df XMM03=000000000012408890d2544e8f7a2c4e XMM04=1f405a6fb7bb44bd00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134f70 XMM06=502bd4cfee7d73e40000000000133dd8 XMM07=e042d86d42eb936e0000000000124308 XMM08=90d2544e8f7a2c4e000000000011d748 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000