syzkaller login: [ 38.968994] BUG: Bad rss-counter state mm:00000000c6a3c03c type:MM_FILEPAGES val:33 [ 38.970236] BUG: Bad rss-counter state mm:00000000c6a3c03c type:MM_ANONPAGES val:22 [ 39.022619] ================================================================== [ 39.023581] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.024514] Read of size 8 at addr ffff88800fca7058 by task sshd/220 [ 39.025282] [ 39.025499] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.026496] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.027483] Call Trace: [ 39.027805] [ 39.028095] dump_stack_lvl+0x91/0xf0 [ 39.028580] print_report+0xcc/0x620 [ 39.029061] ? __virt_addr_valid+0x102/0x340 [ 39.029616] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.030228] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.030859] kasan_report+0xbe/0xf0 [ 39.031344] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.032004] vma_interval_tree_remove+0xc75/0xec0 [ 39.032612] vma_prepare+0xc54/0x11a0 [ 39.033103] __split_vma+0x5af/0x950 [ 39.033582] ? __pfx___split_vma+0x10/0x10 [ 39.034129] ? find_held_lock+0x2c/0x110 [ 39.034686] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.035274] ? lock_is_held_type+0x9f/0x120 [ 39.035828] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.036454] ? mtree_range_walk+0x632/0x900 [ 39.037029] ? mas_walk+0x5c7/0x7c0 [ 39.037523] do_vmi_munmap+0x1f1/0x2b0 [ 39.038031] mmap_region+0x1f9/0x2660 [ 39.038544] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.039077] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.039817] ? __pfx_lock_acquire+0x10/0x10 [ 39.040367] ? __pfx_mmap_region+0x10/0x10 [ 39.040917] ? security_mmap_addr+0x7d/0xa0 [ 39.041449] ? get_unmapped_area+0x1f5/0x3f0 [ 39.042020] do_mmap+0x854/0xf00 [ 39.042457] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.042961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.043530] ksys_mmap_pgoff+0x3af/0x500 [ 39.044030] do_syscall_64+0x3f/0x90 [ 39.044498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.045173] RIP: 0033:0x7fd2bf118d82 [ 39.045646] 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 [ 39.047806] RSP: 002b:00007ffcece19958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.048711] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd2bf118d82 [ 39.049577] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd2be552000 [ 39.050418] RBP: 00007fd2be552000 R08: 0000000000000009 R09: 0000000000001000 [ 39.051266] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565077295ec0 [ 39.052112] R13: 00007ffcece19970 R14: 00007ffcece199a0 R15: 00007ffcece19d00 [ 39.052962] [ 39.053249] [ 39.053465] Allocated by task 213: [ 39.053893] kasan_save_stack+0x22/0x50 [ 39.054406] kasan_set_track+0x25/0x30 [ 39.054923] __kasan_slab_alloc+0x59/0x70 [ 39.055452] kmem_cache_alloc+0x16b/0x370 [ 39.055969] vm_area_dup+0x20/0x160 [ 39.056427] __split_vma+0x170/0x950 [ 39.056898] split_vma+0xc6/0x110 [ 39.057337] mprotect_fixup+0x8d2/0xb30 [ 39.057845] do_mprotect_pkey+0x87e/0xd40 [ 39.058393] __x64_sys_mprotect+0x78/0xc0 [ 39.058950] do_syscall_64+0x3f/0x90 [ 39.059422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.060089] [ 39.060306] Freed by task 13: [ 39.060693] kasan_save_stack+0x22/0x50 [ 39.061194] kasan_set_track+0x25/0x30 [ 39.061685] kasan_save_free_info+0x2b/0x50 [ 39.062221] __kasan_slab_free+0x10a/0x190 [ 39.062770] kmem_cache_free+0x10d/0x4d0 [ 39.063276] rcu_core+0x8c8/0x2860 [ 39.063722] __do_softirq+0x1b7/0x7d4 [ 39.064211] [ 39.064430] Last potentially related work creation: [ 39.065026] kasan_save_stack+0x22/0x50 [ 39.065532] __kasan_record_aux_stack+0x8e/0xa0 [ 39.066105] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.066793] remove_vma+0x139/0x170 [ 39.067267] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.067836] do_vmi_munmap+0x1f1/0x2b0 [ 39.068320] __vm_munmap+0x138/0x3a0 [ 39.068785] __x64_sys_munmap+0x59/0x80 [ 39.069278] do_syscall_64+0x3f/0x90 [ 39.069752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.070388] [ 39.070610] The buggy address belongs to the object at ffff88800fca7000 [ 39.070610] which belongs to the cache vm_area_struct of size 168 [ 39.072065] The buggy address is located 88 bytes inside of [ 39.072065] freed 168-byte region [ffff88800fca7000, ffff88800fca70a8) [ 39.073466] [ 39.073679] The buggy address belongs to the physical page: [ 39.074330] page:00000000929ee6f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfca7 [ 39.075418] memcg:ffff888019d29201 [ 39.075844] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.076498] page_type: 0xffffffff() [ 39.076947] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.077859] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d29201 [ 39.078771] page dumped because: kasan: bad access detected [ 39.079428] [ 39.079643] Memory state around the buggy address: [ 39.080231] ffff88800fca6f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 39.081082] ffff88800fca6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.081930] >ffff88800fca7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.082789] ^ [ 39.083507] ffff88800fca7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.084356] ffff88800fca7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.085198] ================================================================== [ 39.086463] Disabling lock debugging due to kernel taint [ 41.268881] BUG: Bad rss-counter state mm:00000000c11f26bf type:MM_FILEPAGES val:33 [ 41.269843] BUG: Bad rss-counter state mm:00000000c11f26bf type:MM_ANONPAGES val:22 [ 41.725110] BUG: Bad rss-counter state mm:00000000b50d57f4 type:MM_FILEPAGES val:33 [ 41.726102] BUG: Bad rss-counter state mm:00000000b50d57f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24008' (ECDSA) to the list of known hosts. 2023/06/19 16:41:21 fuzzer started 2023/06/19 16:41:22 dialing manager at localhost:44161 2023/06/19 16:41:22 checking machine... 2023/06/19 16:41:22 checking revisions... [ 42.497179] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:41:22 testing simple program... [ 42.553577] cgroup: Unknown subsys name 'net' [ 42.608568] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:41:21 Registers: info registers vcpu 0 RAX=f917c470eee2b900 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0a80f76 RSP=ffffffff85407ba0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff888008c58000 R12=ffff88806ce39518 R13=ffffffff812340ae R14=ffff88801596d668 R15=ffff88806ce39500 RIP=ffffffff812d89f4 RFL=00000082 [--S----] 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 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=00007f9e7d629a70 CR3=000000000c4f4000 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=79c1d097b80d059e594c11526b9e67e5 XMM02=000000000011e480eff9b2d0a8fce9cb XMM03=000000000011e5502c67c8bc2e329bc3 XMM04=8c1a507aaaade1b600000000000ae988 XMM05=19e9129bd510f2350000000000133ff0 XMM06=3b2c0c8b1cc130a700000000001331c8 XMM07=e042d86d42eb936e00000000001249f0 XMM08=6304877a62122de0000000000011e550 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8386627a RDX=0000000000028662 RSI=0000000000028662 RDI=ffffffff86589548 RBP=ffff88801798f9f8 RSP=ffff88801798f930 R8 =0000000000000000 R9 =ffff88801798f9e0 R10=0000000000038001 R11=0000000000091967 R12=ffff88801798fa00 R13=ffff88801798f9e8 R14=ffff88801798f9e1 R15=ffff88801798f9a0 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007fc815fac900 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=00007ffeea5a0000 CR3=000000000ed28000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000