syzkaller login: [ 31.661416] BUG: Bad rss-counter state mm:00000000fea9ae0f type:MM_FILEPAGES val:33 [ 31.662417] BUG: Bad rss-counter state mm:00000000fea9ae0f type:MM_ANONPAGES val:22 [ 31.835681] ================================================================== [ 31.836672] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.837693] Read of size 8 at addr ffff888018e47058 by task sshd/220 [ 31.838630] [ 31.838865] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.839792] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.840938] Call Trace: [ 31.841290] [ 31.841603] dump_stack_lvl+0x91/0xf0 [ 31.842143] print_report+0xcc/0x620 [ 31.842666] ? __virt_addr_valid+0x102/0x340 [ 31.843259] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.843931] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.844596] kasan_report+0xbe/0xf0 [ 31.845117] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.845808] vma_interval_tree_remove+0xc75/0xec0 [ 31.846486] vma_prepare+0xc54/0x11a0 [ 31.847016] __split_vma+0x5af/0x950 [ 31.847541] ? __pfx___split_vma+0x10/0x10 [ 31.848124] ? find_held_lock+0x2c/0x110 [ 31.848704] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.849328] ? lock_is_held_type+0x9f/0x120 [ 31.849923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.850625] ? mtree_range_walk+0x632/0x900 [ 31.851233] ? mas_walk+0x5c7/0x7c0 [ 31.851758] do_vmi_munmap+0x1f1/0x2b0 [ 31.852301] mmap_region+0x1f9/0x2660 [ 31.852839] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.853411] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.854210] ? __pfx_lock_acquire+0x10/0x10 [ 31.854799] ? __pfx_mmap_region+0x10/0x10 [ 31.855374] ? security_mmap_addr+0x7d/0xa0 [ 31.855961] ? get_unmapped_area+0x1f5/0x3f0 [ 31.856569] do_mmap+0x854/0xf00 [ 31.857061] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.857610] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.858234] ksys_mmap_pgoff+0x3af/0x500 [ 31.858796] do_syscall_64+0x3f/0x90 [ 31.859325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.860035] RIP: 0033:0x7ff500d35d82 [ 31.860546] 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 [ 31.862910] RSP: 002b:00007fff760e0098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.863914] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff500d35d82 [ 31.864858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff50016f000 [ 31.865809] RBP: 00007ff50016f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.866742] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d4ee5f6b20 [ 31.867686] R13: 00007fff760e00b0 R14: 00007fff760e00e0 R15: 00007fff760e0440 [ 31.868631] [ 31.868953] [ 31.869194] Allocated by task 213: [ 31.869667] kasan_save_stack+0x22/0x50 [ 31.870219] kasan_set_track+0x25/0x30 [ 31.870768] __kasan_slab_alloc+0x59/0x70 [ 31.871371] kmem_cache_alloc+0x16b/0x370 [ 31.871940] vm_area_dup+0x20/0x160 [ 31.872434] __split_vma+0x170/0x950 [ 31.872943] split_vma+0xc6/0x110 [ 31.873438] mprotect_fixup+0x8d2/0xb30 [ 31.874025] do_mprotect_pkey+0x87e/0xd40 [ 31.874618] __x64_sys_mprotect+0x78/0xc0 [ 31.875221] do_syscall_64+0x3f/0x90 [ 31.875746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.876470] [ 31.876706] Freed by task 213: [ 31.877162] kasan_save_stack+0x22/0x50 [ 31.877737] kasan_set_track+0x25/0x30 [ 31.878304] kasan_save_free_info+0x2b/0x50 [ 31.878898] __kasan_slab_free+0x10a/0x190 [ 31.879490] kmem_cache_free+0x10d/0x4d0 [ 31.880063] rcu_core+0x8c8/0x2860 [ 31.880556] __do_softirq+0x1b7/0x7d4 [ 31.881087] [ 31.881322] Last potentially related work creation: [ 31.881981] kasan_save_stack+0x22/0x50 [ 31.882590] __kasan_record_aux_stack+0x8e/0xa0 [ 31.883242] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.883955] remove_vma+0x139/0x170 [ 31.884406] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.884963] do_vmi_munmap+0x1f1/0x2b0 [ 31.885447] __vm_munmap+0x138/0x3a0 [ 31.885912] __x64_sys_munmap+0x59/0x80 [ 31.886413] do_syscall_64+0x3f/0x90 [ 31.886882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.887513] [ 31.887732] The buggy address belongs to the object at ffff888018e47000 [ 31.887732] which belongs to the cache vm_area_struct of size 168 [ 31.889186] The buggy address is located 88 bytes inside of [ 31.889186] freed 168-byte region [ffff888018e47000, ffff888018e470a8) [ 31.890575] [ 31.890787] The buggy address belongs to the physical page: [ 31.891449] page:00000000c64118a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e47 [ 31.892535] memcg:ffff88800d134c01 [ 31.892960] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.893596] page_type: 0xffffffff() [ 31.894057] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.894972] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d134c01 [ 31.895869] page dumped because: kasan: bad access detected [ 31.896520] [ 31.896733] Memory state around the buggy address: [ 31.897305] ffff888018e46f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.898157] ffff888018e46f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.899041] >ffff888018e47000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.899914] ^ [ 31.900663] ffff888018e47080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.901531] ffff888018e47100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.902446] ================================================================== [ 31.903458] Disabling lock debugging due to kernel taint [ 33.725589] BUG: Bad rss-counter state mm:00000000531fc022 type:MM_FILEPAGES val:33 [ 33.726397] BUG: Bad rss-counter state mm:00000000531fc022 type:MM_ANONPAGES val:22 [ 34.203409] BUG: Bad rss-counter state mm:000000003ddadf67 type:MM_FILEPAGES val:33 [ 34.204467] BUG: Bad rss-counter state mm:000000003ddadf67 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36179' (ECDSA) to the list of known hosts. 2023/06/20 06:31:25 fuzzer started 2023/06/20 06:31:25 dialing manager at localhost:44161 2023/06/20 06:31:25 checking machine... 2023/06/20 06:31:25 checking revisions... [ 34.921337] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:31:25 testing simple program... [ 34.977104] cgroup: Unknown subsys name 'net' [ 35.038877] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:31:24 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f0bf6e72650 CR3=000000000ea14000 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=2034323a31333a3630203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffed10011aea38 RCX=1ffffffff0ba7a02 RDX=1ffff110011aecc7 RSI=0000000000000008 RDI=ffff888008d76638 RBP=ffff888008d751c0 RSP=ffff888008e27e68 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=ffff888008d751c0 R15=0000000000000000 RIP=ffffffff8451a07e 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 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=00007f2f9dda4590 CR3=000000000966c000 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=1c136f329da28f87a6483d6a9218ba0f XMM02=000000000011cb70eff9b2d0a8fce9cb XMM03=000000000011cc402c67c8bc2e329bc3 XMM04=89951b399dbc25ae00000000000ae988 XMM05=19e9129bd510f2350000000000133b80 XMM06=7d3e35593fa2352b00000000001329e8 XMM07=e042d86d42eb936e0000000000124300 XMM08=7473307eed5737ce000000000011cc40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000