syzkaller login: [ 64.034136] BUG: Bad rss-counter state mm:00000000d4ed8fb2 type:MM_FILEPAGES val:33 [ 64.035791] BUG: Bad rss-counter state mm:00000000d4ed8fb2 type:MM_ANONPAGES val:22 [ 64.195830] ================================================================== [ 64.196777] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.197706] Read of size 8 at addr ffff88800e58cd08 by task sshd/221 [ 64.198548] [ 64.198771] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 64.199636] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.200668] Call Trace: [ 64.200991] <TASK> [ 64.201283] dump_stack_lvl+0x91/0xf0 [ 64.201784] print_report+0xcc/0x620 [ 64.202271] ? __virt_addr_valid+0x102/0x340 [ 64.202822] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.203447] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.204080] kasan_report+0xbe/0xf0 [ 64.204582] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.205216] vma_interval_tree_remove+0xc75/0xec0 [ 64.205826] vma_prepare+0xc54/0x11a0 [ 64.206316] __split_vma+0x5af/0x950 [ 64.206793] ? __pfx___split_vma+0x10/0x10 [ 64.207332] ? find_held_lock+0x2c/0x110 [ 64.207857] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.208449] ? lock_is_held_type+0x9f/0x120 [ 64.209007] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.209617] ? mtree_range_walk+0x632/0x900 [ 64.210174] ? mas_walk+0x5c7/0x7c0 [ 64.210653] do_vmi_munmap+0x1f1/0x2b0 [ 64.211157] mmap_region+0x1f9/0x2660 [ 64.211652] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.212178] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.212927] ? __pfx_lock_acquire+0x10/0x10 [ 64.213471] ? __pfx_mmap_region+0x10/0x10 [ 64.214013] ? security_mmap_addr+0x7d/0xa0 [ 64.214549] ? get_unmapped_area+0x1f5/0x3f0 [ 64.215108] do_mmap+0x854/0xf00 [ 64.215559] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.216064] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.216630] ksys_mmap_pgoff+0x3af/0x500 [ 64.217145] do_syscall_64+0x3f/0x90 [ 64.217632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.218279] RIP: 0033:0x7f8976633d82 [ 64.218740] 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 [ 64.220993] RSP: 002b:00007fff93113e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.221939] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8976633d82 [ 64.222796] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8975a6d000 [ 64.223653] RBP: 00007f8975a6d000 R08: 0000000000000009 R09: 0000000000001000 [ 64.224531] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b89cbd5d90 [ 64.225384] R13: 00007fff93113e50 R14: 00007fff93113e80 R15: 00007fff931141e0 [ 64.226257] </TASK> [ 64.226563] [ 64.226778] Allocated by task 214: [ 64.227213] kasan_save_stack+0x22/0x50 [ 64.227728] kasan_set_track+0x25/0x30 [ 64.228231] __kasan_slab_alloc+0x59/0x70 [ 64.228767] kmem_cache_alloc+0x16b/0x370 [ 64.229298] vm_area_dup+0x20/0x160 [ 64.229767] __split_vma+0x170/0x950 [ 64.230245] split_vma+0xc6/0x110 [ 64.230701] mprotect_fixup+0x8d2/0xb30 [ 64.231207] do_mprotect_pkey+0x87e/0xd40 [ 64.231739] __x64_sys_mprotect+0x78/0xc0 [ 64.232297] do_syscall_64+0x3f/0x90 [ 64.232775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.233439] [ 64.233659] Freed by task 214: [ 64.234059] kasan_save_stack+0x22/0x50 [ 64.234574] kasan_set_track+0x25/0x30 [ 64.235073] kasan_save_free_info+0x2b/0x50 [ 64.235613] __kasan_slab_free+0x10a/0x190 [ 64.236164] kmem_cache_free+0x10d/0x4d0 [ 64.236696] rcu_core+0x8c8/0x2860 [ 64.237154] __do_softirq+0x1b7/0x7d4 [ 64.237638] [ 64.237861] Last potentially related work creation: [ 64.238459] kasan_save_stack+0x22/0x50 [ 64.238968] __kasan_record_aux_stack+0x8e/0xa0 [ 64.239545] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.240200] remove_vma+0x139/0x170 [ 64.240685] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.241251] do_vmi_munmap+0x1f1/0x2b0 [ 64.241741] __vm_munmap+0x138/0x3a0 [ 64.242219] __x64_sys_munmap+0x59/0x80 [ 64.242732] do_syscall_64+0x3f/0x90 [ 64.243208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.243856] [ 64.244071] Second to last potentially related work creation: [ 64.244776] kasan_save_stack+0x22/0x50 [ 64.245284] __kasan_record_aux_stack+0x8e/0xa0 [ 64.245868] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.246522] remove_vma+0x139/0x170 [ 64.246982] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.247559] do_vmi_munmap+0x1f1/0x2b0 [ 64.248056] mmap_region+0x1f9/0x2660 [ 64.248556] do_mmap+0x854/0xf00 [ 64.248999] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.249498] ksys_mmap_pgoff+0x3af/0x500 [ 64.250009] do_syscall_64+0x3f/0x90 [ 64.250498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.251164] [ 64.251380] The buggy address belongs to the object at ffff88800e58ccb0 [ 64.251380] which belongs to the cache vm_area_struct of size 168 [ 64.252901] The buggy address is located 88 bytes inside of [ 64.252901] freed 168-byte region [ffff88800e58ccb0, ffff88800e58cd58) [ 64.254339] [ 64.254560] The buggy address belongs to the physical page: [ 64.255219] page:000000004ebd8b9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe58c [ 64.256336] memcg:ffff88800c7bc301 [ 64.256766] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 64.257468] page_type: 0xffffffff() [ 64.257930] raw: 0100000000000200 ffff88800879fc80 ffffea00003b9ec0 dead000000000005 [ 64.258868] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7bc301 [ 64.259811] page dumped because: kasan: bad access detected [ 64.260494] [ 64.260715] Memory state around the buggy address: [ 64.261312] ffff88800e58cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 64.262183] ffff88800e58cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 64.263047] >ffff88800e58cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 64.263916] ^ [ 64.264388] ffff88800e58cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.265246] ffff88800e58ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 64.266111] ================================================================== [ 64.267096] Disabling lock debugging due to kernel taint [ 66.458783] BUG: Bad rss-counter state mm:000000008f3453aa type:MM_FILEPAGES val:33 [ 66.459782] BUG: Bad rss-counter state mm:000000008f3453aa type:MM_ANONPAGES val:22 [ 66.951620] BUG: Bad rss-counter state mm:00000000fdfaa966 type:MM_FILEPAGES val:33 [ 66.952812] BUG: Bad rss-counter state mm:00000000fdfaa966 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21193' (ECDSA) to the list of known hosts. 2023/06/20 07:20:21 fuzzer started 2023/06/20 07:20:21 dialing manager at localhost:44161 2023/06/20 07:20:21 checking machine... 2023/06/20 07:20:21 checking revisions... [ 67.598034] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:20:21 testing simple program... [ 67.653787] cgroup: Unknown subsys name 'net' [ 67.695600] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:20:18 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=000000004f4c34ee RCX=ffff88806ca1a770 RDX=000000000000000e RSI=0000000000000001 RDI=000000007d1fcd23 RBP=ffff88800e9826a0 RSP=ffff88801028fa20 R8 =00000000bba225d2 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000dc0 R14=ffff88801028fa88 R15=000000000000000e RIP=ffffffff82270f13 RFL=00000206 [-----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 00007fa6c69cf900 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=00007fa6c6f84650 CR3=000000000e900000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888017f798b8 RCX=ffffffff812e00e5 RDX=1ffff11002fef319 RSI=ffffffff87b86f80 RDI=ffff888017f798c8 RBP=ffff888017f798b8 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=ffff888017f798b8 R13=ffff88800e83e788 R14=0000000000000000 R15=ffffffff87b86f80 RIP=ffffffff844cc9cb RFL=00000046 [---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 00007f4c8e7f2700 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=00007f7d37d453d0 CR3=00000000164c8000 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=2030323a30323a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a30323a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000