syzkaller login: [ 43.951029] BUG: Bad rss-counter state mm:000000000e5ef5dc type:MM_FILEPAGES val:33 [ 43.952422] BUG: Bad rss-counter state mm:000000000e5ef5dc type:MM_ANONPAGES val:22 [ 44.098284] ================================================================== [ 44.099389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.100636] Read of size 8 at addr ffff88800c66fed8 by task sshd/219 [ 44.101541] [ 44.101798] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.102796] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.103760] Call Trace: [ 44.104073] [ 44.104353] dump_stack_lvl+0x91/0xf0 [ 44.104849] print_report+0xcc/0x620 [ 44.105328] ? __virt_addr_valid+0x102/0x340 [ 44.105878] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.106500] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.107112] kasan_report+0xbe/0xf0 [ 44.107582] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.108208] vma_interval_tree_remove+0xc75/0xec0 [ 44.108812] vma_prepare+0xc54/0x11a0 [ 44.109290] __split_vma+0x5af/0x950 [ 44.109765] ? __pfx___split_vma+0x10/0x10 [ 44.110287] ? find_held_lock+0x2c/0x110 [ 44.110804] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.111374] ? lock_is_held_type+0x9f/0x120 [ 44.111911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.112530] ? mtree_range_walk+0x632/0x900 [ 44.113084] ? mas_walk+0x5c7/0x7c0 [ 44.113554] do_vmi_munmap+0x1f1/0x2b0 [ 44.114045] mmap_region+0x1f9/0x2660 [ 44.114520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.115030] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.115747] ? __pfx_lock_acquire+0x10/0x10 [ 44.116276] ? __pfx_mmap_region+0x10/0x10 [ 44.116818] ? security_mmap_addr+0x7d/0xa0 [ 44.117355] ? get_unmapped_area+0x1f5/0x3f0 [ 44.117911] do_mmap+0x854/0xf00 [ 44.118347] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.118840] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.119392] ksys_mmap_pgoff+0x3af/0x500 [ 44.119899] do_syscall_64+0x3f/0x90 [ 44.120376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.121053] RIP: 0033:0x7fd9bfe21d82 [ 44.121509] 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 [ 44.123633] RSP: 002b:00007ffd0f1865a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.124534] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9bfe21d82 [ 44.125369] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9bf25b000 [ 44.126217] RBP: 00007fd9bf25b000 R08: 0000000000000009 R09: 0000000000001000 [ 44.127052] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6b7609d90 [ 44.127885] R13: 00007ffd0f1865c0 R14: 00007ffd0f1865f0 R15: 00007ffd0f186950 [ 44.128749] [ 44.129043] [ 44.129257] Allocated by task 212: [ 44.129677] kasan_save_stack+0x22/0x50 [ 44.130178] kasan_set_track+0x25/0x30 [ 44.130669] __kasan_slab_alloc+0x59/0x70 [ 44.131186] kmem_cache_alloc+0x16b/0x370 [ 44.131692] vm_area_dup+0x20/0x160 [ 44.132138] __split_vma+0x170/0x950 [ 44.132616] split_vma+0xc6/0x110 [ 44.133053] mprotect_fixup+0x8d2/0xb30 [ 44.133546] do_mprotect_pkey+0x87e/0xd40 [ 44.134061] __x64_sys_mprotect+0x78/0xc0 [ 44.134574] do_syscall_64+0x3f/0x90 [ 44.135042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.135676] [ 44.135888] Freed by task 13: [ 44.136268] kasan_save_stack+0x22/0x50 [ 44.136774] kasan_set_track+0x25/0x30 [ 44.137262] kasan_save_free_info+0x2b/0x50 [ 44.137788] __kasan_slab_free+0x10a/0x190 [ 44.138319] kmem_cache_free+0x10d/0x4d0 [ 44.138834] rcu_core+0x8c8/0x2860 [ 44.139269] __do_softirq+0x1b7/0x7d4 [ 44.139742] [ 44.139956] Last potentially related work creation: [ 44.140549] kasan_save_stack+0x22/0x50 [ 44.141058] __kasan_record_aux_stack+0x8e/0xa0 [ 44.141667] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.142301] remove_vma+0x139/0x170 [ 44.142746] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.143298] do_vmi_munmap+0x1f1/0x2b0 [ 44.143787] __vm_munmap+0x138/0x3a0 [ 44.144250] __x64_sys_munmap+0x59/0x80 [ 44.144762] do_syscall_64+0x3f/0x90 [ 44.145229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.145864] [ 44.146077] Second to last potentially related work creation: [ 44.146755] kasan_save_stack+0x22/0x50 [ 44.147249] __kasan_record_aux_stack+0x8e/0xa0 [ 44.147813] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.148450] remove_vma+0x139/0x170 [ 44.148907] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.149455] do_vmi_munmap+0x1f1/0x2b0 [ 44.149944] mmap_region+0x1f9/0x2660 [ 44.150415] do_mmap+0x854/0xf00 [ 44.150843] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.151328] ksys_mmap_pgoff+0x3af/0x500 [ 44.151827] do_syscall_64+0x3f/0x90 [ 44.152294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.152948] [ 44.153164] The buggy address belongs to the object at ffff88800c66fe80 [ 44.153164] which belongs to the cache vm_area_struct of size 168 [ 44.154611] The buggy address is located 88 bytes inside of [ 44.154611] freed 168-byte region [ffff88800c66fe80, ffff88800c66ff28) [ 44.156004] [ 44.156217] The buggy address belongs to the physical page: [ 44.156872] page:000000005b15cd4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc66f [ 44.157941] memcg:ffff88800e091301 [ 44.158368] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.159056] page_type: 0xffffffff() [ 44.159505] raw: 0100000000000200 ffff88800879fc80 ffffea00003182c0 dead000000000005 [ 44.160415] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e091301 [ 44.161318] page dumped because: kasan: bad access detected [ 44.161976] [ 44.162190] Memory state around the buggy address: [ 44.162767] ffff88800c66fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.163615] ffff88800c66fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 44.164466] >ffff88800c66fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.165332] ^ [ 44.166055] ffff88800c66ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 44.166906] ffff88800c66ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 44.167753] ================================================================== [ 44.168678] Disabling lock debugging due to kernel taint [ 46.732611] BUG: Bad rss-counter state mm:000000000928bcab type:MM_FILEPAGES val:33 [ 46.733593] BUG: Bad rss-counter state mm:000000000928bcab type:MM_ANONPAGES val:22 [ 47.260770] BUG: Bad rss-counter state mm:000000004c517c60 type:MM_FILEPAGES val:33 [ 47.261983] BUG: Bad rss-counter state mm:000000004c517c60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41700' (ECDSA) to the list of known hosts. 2023/06/19 19:00:14 fuzzer started 2023/06/19 19:00:14 dialing manager at localhost:44161 2023/06/19 19:00:14 checking machine... 2023/06/19 19:00:14 checking revisions... [ 47.895479] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:00:14 testing simple program... [ 47.926648] cgroup: Unknown subsys name 'net' [ 47.956839] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:00:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81452227 RDX=ffff888016669b40 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88800fedfce8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800da53000 R13=ffff888016669b40 R14=ffff88800e70d000 R15=0000000000000001 RIP=ffffffff814c07e0 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 00007fbe3f6f5900 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=00007fbe3fcac618 CR3=000000000ef1a000 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=ffff888008c58400 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=00007f787b667000 CR3=000000000c7d8000 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=3da742b31f3334a10640c67043d5c551 XMM02=2c67c8bc2e329bc3000000000011e198 XMM03=fb795ef6d657705600000000001243c0 XMM04=e8bc7518698d58be00000000000ae988 XMM05=d2d473fa01d4d3040000000000135eb8 XMM06=4fda316b135da52b0000000000135858 XMM07=e042d86d42eb936e0000000000124640 XMM08=47620654bbad1678000000000011e1f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000