syzkaller login: [ 32.523621] BUG: Bad rss-counter state mm:00000000e995a8d9 type:MM_FILEPAGES val:33 [ 32.524610] BUG: Bad rss-counter state mm:00000000e995a8d9 type:MM_ANONPAGES val:22 [ 32.685321] ================================================================== [ 32.686475] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.687834] Read of size 8 at addr ffff88800c6a83f8 by task sshd/220 [ 32.688623] [ 32.688840] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.689689] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.690715] Call Trace: [ 32.691123] [ 32.691469] dump_stack_lvl+0x91/0xf0 [ 32.692082] print_report+0xcc/0x620 [ 32.692678] ? __virt_addr_valid+0x102/0x340 [ 32.693357] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.694114] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.694874] kasan_report+0xbe/0xf0 [ 32.695480] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.696234] vma_interval_tree_remove+0xc75/0xec0 [ 32.696979] vma_prepare+0xc54/0x11a0 [ 32.697570] __split_vma+0x5af/0x950 [ 32.698149] ? __pfx___split_vma+0x10/0x10 [ 32.698798] ? find_held_lock+0x2c/0x110 [ 32.699469] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.700033] ? lock_is_held_type+0x9f/0x120 [ 32.700565] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.701165] ? mtree_range_walk+0x632/0x900 [ 32.701717] ? mas_walk+0x5c7/0x7c0 [ 32.702184] do_vmi_munmap+0x1f1/0x2b0 [ 32.702683] mmap_region+0x1f9/0x2660 [ 32.703169] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.703676] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.704377] ? __pfx_lock_acquire+0x10/0x10 [ 32.704911] ? __pfx_mmap_region+0x10/0x10 [ 32.705436] ? security_mmap_addr+0x7d/0xa0 [ 32.705961] ? get_unmapped_area+0x1f5/0x3f0 [ 32.706501] do_mmap+0x854/0xf00 [ 32.706944] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.707434] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.707988] ksys_mmap_pgoff+0x3af/0x500 [ 32.708490] do_syscall_64+0x3f/0x90 [ 32.708961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.709598] RIP: 0033:0x7fd58e02cd82 [ 32.710047] 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 [ 32.712167] RSP: 002b:00007ffc5d477dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.713056] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd58e02cd82 [ 32.713892] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd58d466000 [ 32.714761] RBP: 00007fd58d466000 R08: 0000000000000009 R09: 0000000000001000 [ 32.715630] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b1b09df70 [ 32.716469] R13: 00007ffc5d477df0 R14: 00007ffc5d477e20 R15: 00007ffc5d478180 [ 32.717324] [ 32.717613] [ 32.717830] Allocated by task 213: [ 32.718254] kasan_save_stack+0x22/0x50 [ 32.718756] kasan_set_track+0x25/0x30 [ 32.719266] __kasan_slab_alloc+0x59/0x70 [ 32.719790] kmem_cache_alloc+0x16b/0x370 [ 32.720304] vm_area_dup+0x20/0x160 [ 32.720762] __split_vma+0x170/0x950 [ 32.721227] split_vma+0xc6/0x110 [ 32.721666] mprotect_fixup+0x8d2/0xb30 [ 32.722166] do_mprotect_pkey+0x87e/0xd40 [ 32.722683] __x64_sys_mprotect+0x78/0xc0 [ 32.723216] do_syscall_64+0x3f/0x90 [ 32.723687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.724325] [ 32.724538] Freed by task 213: [ 32.724932] kasan_save_stack+0x22/0x50 [ 32.725431] kasan_set_track+0x25/0x30 [ 32.725921] kasan_save_free_info+0x2b/0x50 [ 32.726450] __kasan_slab_free+0x10a/0x190 [ 32.726988] kmem_cache_free+0x10d/0x4d0 [ 32.727494] rcu_core+0x8c8/0x2860 [ 32.727934] __do_softirq+0x1b7/0x7d4 [ 32.728413] [ 32.728629] Last potentially related work creation: [ 32.729250] kasan_save_stack+0x22/0x50 [ 32.729754] __kasan_record_aux_stack+0x8e/0xa0 [ 32.730326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.730974] remove_vma+0x139/0x170 [ 32.731429] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.731986] do_vmi_munmap+0x1f1/0x2b0 [ 32.732466] __vm_munmap+0x138/0x3a0 [ 32.732932] __x64_sys_munmap+0x59/0x80 [ 32.733427] do_syscall_64+0x3f/0x90 [ 32.733900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.734533] [ 32.734751] The buggy address belongs to the object at ffff88800c6a83a0 [ 32.734751] which belongs to the cache vm_area_struct of size 168 [ 32.736227] The buggy address is located 88 bytes inside of [ 32.736227] freed 168-byte region [ffff88800c6a83a0, ffff88800c6a8448) [ 32.737627] [ 32.737840] The buggy address belongs to the physical page: [ 32.738489] page:00000000f80e4e73 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6a8 [ 32.739583] memcg:ffff88800cc09301 [ 32.740007] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.740702] page_type: 0xffffffff() [ 32.741146] raw: 0100000000000200 ffff88800879fc80 ffffea000039da40 dead000000000005 [ 32.742061] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc09301 [ 32.742970] page dumped because: kasan: bad access detected [ 32.743629] [ 32.743842] Memory state around the buggy address: [ 32.744415] ffff88800c6a8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.745265] ffff88800c6a8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.746118] >ffff88800c6a8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.746981] ^ [ 32.747815] ffff88800c6a8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.748661] ffff88800c6a8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.749504] ================================================================== [ 32.750425] Disabling lock debugging due to kernel taint [ 34.752543] BUG: Bad rss-counter state mm:00000000c5a09558 type:MM_FILEPAGES val:33 [ 34.754008] BUG: Bad rss-counter state mm:00000000c5a09558 type:MM_ANONPAGES val:22 [ 35.239734] BUG: Bad rss-counter state mm:00000000c2fe946b type:MM_FILEPAGES val:33 [ 35.240960] BUG: Bad rss-counter state mm:00000000c2fe946b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34366' (ECDSA) to the list of known hosts. 2023/06/19 12:46:44 fuzzer started 2023/06/19 12:46:45 dialing manager at localhost:44161 2023/06/19 12:46:45 checking machine... 2023/06/19 12:46:45 checking revisions... [ 35.975982] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:46:45 testing simple program... [ 36.013667] cgroup: Unknown subsys name 'net' [ 36.061448] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:46:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f5f2000 RCX=0000000000000000 RDX=ffff888017888000 RSI=ffffffff8386a31b RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88800c50f9b8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800c50fe60 R13=ffff8880161d3980 R14=ffff88800c50fa88 R15=00000000000000e8 RIP=ffffffff814c07e4 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 00007f90e3e67900 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=00007f90e441e618 CR3=0000000009a64000 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=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=00007fea4cc32bb0 CR3=000000000c738000 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=b407a77b26a62abbab4c5c9c7582743e XMM02=0000000000122070eff9b2d0a8fce9cb XMM03=00000000001221402c67c8bc2e329bc3 XMM04=dc30854b1fc92f5e00000000000ae988 XMM05=19e9129bd510f2350000000000134e00 XMM06=c3a610a345dfce520000000000133c68 XMM07=e042d86d42eb936e00000000001254c8 XMM08=42e974ffa8e6c0250000000000122140 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000