syzkaller login: [ 30.684911] BUG: Bad rss-counter state mm:000000005907cdc1 type:MM_FILEPAGES val:33 [ 30.685946] BUG: Bad rss-counter state mm:000000005907cdc1 type:MM_ANONPAGES val:22 [ 30.802084] ================================================================== [ 30.802817] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.803559] Read of size 8 at addr ffff88800c9ca310 by task sshd/219 [ 30.804160] [ 30.804337] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.805008] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.805946] Call Trace: [ 30.806189] [ 30.806412] dump_stack_lvl+0x91/0xf0 [ 30.806791] print_report+0xcc/0x620 [ 30.807165] ? __virt_addr_valid+0x102/0x340 [ 30.807591] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.808095] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.808467] kasan_report+0xbe/0xf0 [ 30.808741] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.809097] vma_interval_tree_remove+0xc75/0xec0 [ 30.809442] vma_prepare+0xc54/0x11a0 [ 30.809719] __split_vma+0x5af/0x950 [ 30.809992] ? __pfx___split_vma+0x10/0x10 [ 30.810308] ? find_held_lock+0x2c/0x110 [ 30.810611] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.810941] ? lock_is_held_type+0x9f/0x120 [ 30.811257] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.811606] ? mtree_range_walk+0x632/0x900 [ 30.811925] ? mas_walk+0x5c7/0x7c0 [ 30.812200] do_vmi_munmap+0x1f1/0x2b0 [ 30.812493] mmap_region+0x1f9/0x2660 [ 30.812770] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.813068] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.813485] ? __pfx_lock_acquire+0x10/0x10 [ 30.813791] ? __pfx_mmap_region+0x10/0x10 [ 30.814097] ? security_mmap_addr+0x7d/0xa0 [ 30.814406] ? get_unmapped_area+0x1f5/0x3f0 [ 30.814724] do_mmap+0x854/0xf00 [ 30.814974] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.815262] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.815587] ksys_mmap_pgoff+0x3af/0x500 [ 30.815883] do_syscall_64+0x3f/0x90 [ 30.816163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.816556] RIP: 0033:0x7f5bef3e6d82 [ 30.816822] 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 [ 30.818063] RSP: 002b:00007ffc1fb11528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.818586] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5bef3e6d82 [ 30.819080] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5bee820000 [ 30.819574] RBP: 00007f5bee820000 R08: 0000000000000009 R09: 0000000000001000 [ 30.820064] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb9391db20 [ 30.820571] R13: 00007ffc1fb11540 R14: 00007ffc1fb11570 R15: 00007ffc1fb118d0 [ 30.821066] [ 30.821234] [ 30.821357] Allocated by task 212: [ 30.821605] kasan_save_stack+0x22/0x50 [ 30.821896] kasan_set_track+0x25/0x30 [ 30.822178] __kasan_slab_alloc+0x59/0x70 [ 30.822475] kmem_cache_alloc+0x16b/0x370 [ 30.822773] vm_area_dup+0x20/0x160 [ 30.823036] __split_vma+0x170/0x950 [ 30.823309] split_vma+0xc6/0x110 [ 30.823559] mprotect_fixup+0x8d2/0xb30 [ 30.823846] do_mprotect_pkey+0x87e/0xd40 [ 30.824146] __x64_sys_mprotect+0x78/0xc0 [ 30.824454] do_syscall_64+0x3f/0x90 [ 30.824726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.825097] [ 30.825219] Freed by task 202: [ 30.825451] kasan_save_stack+0x22/0x50 [ 30.825744] kasan_set_track+0x25/0x30 [ 30.826028] kasan_save_free_info+0x2b/0x50 [ 30.826332] __kasan_slab_free+0x10a/0x190 [ 30.826639] kmem_cache_free+0x10d/0x4d0 [ 30.826934] rcu_core+0x8c8/0x2860 [ 30.827190] __do_softirq+0x1b7/0x7d4 [ 30.827463] [ 30.827585] Last potentially related work creation: [ 30.827929] kasan_save_stack+0x22/0x50 [ 30.828215] __kasan_record_aux_stack+0x8e/0xa0 [ 30.828553] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.828930] remove_vma+0x139/0x170 [ 30.829191] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.829508] do_vmi_munmap+0x1f1/0x2b0 [ 30.829787] __vm_munmap+0x138/0x3a0 [ 30.830058] __x64_sys_munmap+0x59/0x80 [ 30.830341] do_syscall_64+0x3f/0x90 [ 30.830614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.830982] [ 30.831104] The buggy address belongs to the object at ffff88800c9ca2b8 [ 30.831104] which belongs to the cache vm_area_struct of size 168 [ 30.831960] The buggy address is located 88 bytes inside of [ 30.831960] freed 168-byte region [ffff88800c9ca2b8, ffff88800c9ca360) [ 30.832800] [ 30.832922] The buggy address belongs to the physical page: [ 30.833305] page:000000000d46964a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9ca [ 30.833937] memcg:ffff888015dc8d01 [ 30.834180] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.834554] page_type: 0xffffffff() [ 30.834818] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.835346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015dc8d01 [ 30.835874] page dumped because: kasan: bad access detected [ 30.836260] [ 30.836385] Memory state around the buggy address: [ 30.836718] ffff88800c9ca200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.837209] ffff88800c9ca280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.837702] >ffff88800c9ca300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.838195] ^ [ 30.838469] ffff88800c9ca380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.838964] ffff88800c9ca400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.839454] ================================================================== [ 30.840097] Disabling lock debugging due to kernel taint [ 32.839724] BUG: Bad rss-counter state mm:00000000c4ae5e4f type:MM_FILEPAGES val:33 [ 32.840943] BUG: Bad rss-counter state mm:00000000c4ae5e4f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17675' (ECDSA) to the list of known hosts. [ 33.335104] BUG: Bad rss-counter state mm:0000000055a461af type:MM_FILEPAGES val:33 [ 33.336094] BUG: Bad rss-counter state mm:0000000055a461af type:MM_ANONPAGES val:22 2023/06/21 01:35:00 fuzzer started 2023/06/21 01:35:00 dialing manager at localhost:36067 2023/06/21 01:35:00 checking machine... 2023/06/21 01:35:00 checking revisions... [ 33.884151] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:35:00 testing simple program... [ 33.929564] cgroup: Unknown subsys name 'net' [ 33.968394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:34:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fad56b19020 CR3=0000000009c64000 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=ebbd487a26312e957843bdbeddc0f939 XMM02=000000000011a808d59e07bde36eea69 XMM03=000000000011a930ec2efd57dc4c00df XMM04=1ec5286ecb6fc9b400000000000ae988 XMM05=11b3a15a73248ea70000000000132d30 XMM06=4fda316b135da52b0000000000131b20 XMM07=fb795ef6d65770560000000000121b38 XMM08=2c67c8bc2e329bc3000000000011a930 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=dffffc0000000000 RSI=ffff88800fc676d8 RDI=ffff88800fc67708 RBP=ffff88800fc67760 RSP=ffff88800fc67648 R8 =0000000000000001 R9 =ffff88800fc67748 R10=0000000000038001 R11=0000000000006097 R12=ffff88800fc67768 R13=ffff88800fc67750 R14=ffff88800fc67749 R15=ffff88800fc67708 RIP=ffffffff81130719 RFL=00000282 [--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 00007fa6413ec900 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=00007ffe0b3b0000 CR3=0000000019a36000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000