syzkaller login: [ 30.824774] BUG: Bad rss-counter state mm:00000000fb431ec9 type:MM_FILEPAGES val:33 [ 30.825942] BUG: Bad rss-counter state mm:00000000fb431ec9 type:MM_ANONPAGES val:22 [ 30.862277] ================================================================== [ 30.863392] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.864508] Read of size 8 at addr ffff88800a6e0df0 by task sshd/221 [ 30.865270] [ 30.865488] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.866340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.867325] Call Trace: [ 30.867659] [ 30.867941] dump_stack_lvl+0x91/0xf0 [ 30.868435] print_report+0xcc/0x620 [ 30.868920] ? __virt_addr_valid+0x102/0x340 [ 30.869474] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.870094] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.870702] kasan_report+0xbe/0xf0 [ 30.871175] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.871817] vma_interval_tree_remove+0xc75/0xec0 [ 30.872416] vma_prepare+0xc54/0x11a0 [ 30.872893] __split_vma+0x5af/0x950 [ 30.873363] ? __pfx___split_vma+0x10/0x10 [ 30.874052] ? find_held_lock+0x2c/0x110 [ 30.874574] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.875128] ? lock_is_held_type+0x9f/0x120 [ 30.875678] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.876297] ? mtree_range_walk+0x632/0x900 [ 30.876845] ? mas_walk+0x5c7/0x7c0 [ 30.877312] do_vmi_munmap+0x1f1/0x2b0 [ 30.877805] mmap_region+0x1f9/0x2660 [ 30.878289] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.878800] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.879538] ? __pfx_lock_acquire+0x10/0x10 [ 30.880080] ? __pfx_mmap_region+0x10/0x10 [ 30.880613] ? security_mmap_addr+0x7d/0xa0 [ 30.881138] ? get_unmapped_area+0x1f5/0x3f0 [ 30.881681] do_mmap+0x854/0xf00 [ 30.882125] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.882621] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.883187] ksys_mmap_pgoff+0x3af/0x500 [ 30.883704] do_syscall_64+0x3f/0x90 [ 30.884176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.884815] RIP: 0033:0x7fcc14397d82 [ 30.885272] 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 [ 30.887420] RSP: 002b:00007ffff57c3e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.888318] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc14397d82 [ 30.889163] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc137d1000 [ 30.890003] RBP: 00007fcc137d1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.890852] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585a63a1b20 [ 30.891711] R13: 00007ffff57c3e70 R14: 00007ffff57c3ea0 R15: 00007ffff57c4200 [ 30.892558] [ 30.892851] [ 30.893068] Allocated by task 214: [ 30.893491] kasan_save_stack+0x22/0x50 [ 30.894000] kasan_set_track+0x25/0x30 [ 30.894494] __kasan_slab_alloc+0x59/0x70 [ 30.895017] kmem_cache_alloc+0x16b/0x370 [ 30.895545] vm_area_dup+0x20/0x160 [ 30.895998] __split_vma+0x170/0x950 [ 30.896473] split_vma+0xc6/0x110 [ 30.896906] mprotect_fixup+0x8d2/0xb30 [ 30.897403] do_mprotect_pkey+0x87e/0xd40 [ 30.897918] __x64_sys_mprotect+0x78/0xc0 [ 30.898444] do_syscall_64+0x3f/0x90 [ 30.898915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.899563] [ 30.899776] Freed by task 214: [ 30.900165] kasan_save_stack+0x22/0x50 [ 30.900667] kasan_set_track+0x25/0x30 [ 30.901163] kasan_save_free_info+0x2b/0x50 [ 30.901689] __kasan_slab_free+0x10a/0x190 [ 30.902218] kmem_cache_free+0x10d/0x4d0 [ 30.902728] rcu_core+0x8c8/0x2860 [ 30.903174] __do_softirq+0x1b7/0x7d4 [ 30.903666] [ 30.903881] Last potentially related work creation: [ 30.904465] kasan_save_stack+0x22/0x50 [ 30.904962] __kasan_record_aux_stack+0x8e/0xa0 [ 30.905530] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.906164] remove_vma+0x139/0x170 [ 30.906612] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.907168] do_vmi_munmap+0x1f1/0x2b0 [ 30.907663] __vm_munmap+0x138/0x3a0 [ 30.908128] __x64_sys_munmap+0x59/0x80 [ 30.908629] do_syscall_64+0x3f/0x90 [ 30.909099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.909733] [ 30.909946] The buggy address belongs to the object at ffff88800a6e0d98 [ 30.909946] which belongs to the cache vm_area_struct of size 168 [ 30.911424] The buggy address is located 88 bytes inside of [ 30.911424] freed 168-byte region [ffff88800a6e0d98, ffff88800a6e0e40) [ 30.912821] [ 30.913036] The buggy address belongs to the physical page: [ 30.913698] page:00000000ea867c70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa6e0 [ 30.914768] memcg:ffff888014220501 [ 30.915195] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.915843] page_type: 0xffffffff() [ 30.916291] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.917198] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014220501 [ 30.918165] page dumped because: kasan: bad access detected [ 30.918828] [ 30.919049] Memory state around the buggy address: [ 30.919642] ffff88800a6e0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.920491] ffff88800a6e0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.921347] >ffff88800a6e0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.922201] ^ [ 30.923012] ffff88800a6e0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.923866] ffff88800a6e0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.924715] ================================================================== [ 30.925622] Disabling lock debugging due to kernel taint [ 33.601930] BUG: Bad rss-counter state mm:00000000972c1616 type:MM_FILEPAGES val:33 [ 33.602976] BUG: Bad rss-counter state mm:00000000972c1616 type:MM_ANONPAGES val:22 [ 34.086837] BUG: Bad rss-counter state mm:000000001f8c9aa9 type:MM_FILEPAGES val:33 [ 34.087852] BUG: Bad rss-counter state mm:000000001f8c9aa9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54199' (ECDSA) to the list of known hosts. 2023/06/19 21:07:56 fuzzer started 2023/06/19 21:07:56 dialing manager at localhost:44161 2023/06/19 21:07:56 checking machine... 2023/06/19 21:07:56 checking revisions... [ 34.914304] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:07:56 testing simple program... [ 34.956974] cgroup: Unknown subsys name 'net' [ 35.004984] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:07:56 Registers: info registers vcpu 0 RAX=ffffffff81807ebb RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001e74eb0 RSI=ffffffff81807ebb RDI=ffff88800f3a75f0 RBP=ffff88800f3a75c0 RSP=ffff88800f3a7520 R8 =0000000000000001 R9 =ffff88800f3a7568 R10=0000000000038001 R11=0000000000020de7 R12=ffff88800f3a75f0 R13=0000000000000000 R14=ffff888019df1b40 R15=0000000000000d40 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007f787e70e700 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=00007fb0544c8510 CR3=0000000018c38000 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=2036353a37303a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a37303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000100 RBX=0000000000000000 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff81452d41 RDI=ffff888008e2d5b4 RBP=ffff88800f10d000 RSP=ffff888008e57c78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=ffff8880168d8000 R13=0000000000000000 R14=ffffffff87f9478c R15=ffff8880168d86c0 RIP=ffffffff814c07eb RFL=00000293 [--S-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 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=00007ffcc978a000 CR3=000000001caec000 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