syzkaller login: [ 40.454101] BUG: Bad rss-counter state mm:000000008643fb83 type:MM_FILEPAGES val:33 [ 40.455123] BUG: Bad rss-counter state mm:000000008643fb83 type:MM_ANONPAGES val:22 [ 40.621781] ================================================================== [ 40.622783] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.623815] Read of size 8 at addr ffff88800ed44798 by task sshd/219 [ 40.624648] [ 40.624966] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.625897] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.626965] Call Trace: [ 40.627321] <TASK> [ 40.627637] dump_stack_lvl+0x91/0xf0 [ 40.628164] print_report+0xcc/0x620 [ 40.628686] ? __virt_addr_valid+0x102/0x340 [ 40.629289] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.629953] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.630623] kasan_report+0xbe/0xf0 [ 40.631165] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.631825] vma_interval_tree_remove+0xc75/0xec0 [ 40.632475] vma_prepare+0xc54/0x11a0 [ 40.633000] __split_vma+0x5af/0x950 [ 40.633515] ? __pfx___split_vma+0x10/0x10 [ 40.634100] ? find_held_lock+0x2c/0x110 [ 40.634667] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.635291] ? lock_is_held_type+0x9f/0x120 [ 40.635882] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.636546] ? mtree_range_walk+0x632/0x900 [ 40.637156] ? mas_walk+0x5c7/0x7c0 [ 40.637675] do_vmi_munmap+0x1f1/0x2b0 [ 40.638219] mmap_region+0x1f9/0x2660 [ 40.638746] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.639324] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.640107] ? __pfx_lock_acquire+0x10/0x10 [ 40.640689] ? __pfx_mmap_region+0x10/0x10 [ 40.641275] ? security_mmap_addr+0x7d/0xa0 [ 40.641859] ? get_unmapped_area+0x1f5/0x3f0 [ 40.642465] do_mmap+0x854/0xf00 [ 40.642943] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.643513] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.644130] ksys_mmap_pgoff+0x3af/0x500 [ 40.644684] do_syscall_64+0x3f/0x90 [ 40.645210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.645917] RIP: 0033:0x7f8fd3c64d82 [ 40.646423] 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 [ 40.648778] RSP: 002b:00007ffe90f2b338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.649773] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8fd3c64d82 [ 40.650711] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8fd309e000 [ 40.651648] RBP: 00007f8fd309e000 R08: 0000000000000009 R09: 0000000000001000 [ 40.652579] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591667eef70 [ 40.653514] R13: 00007ffe90f2b350 R14: 00007ffe90f2b380 R15: 00007ffe90f2b6e0 [ 40.654455] </TASK> [ 40.654783] [ 40.655016] Allocated by task 212: [ 40.655508] kasan_save_stack+0x22/0x50 [ 40.656064] kasan_set_track+0x25/0x30 [ 40.656609] __kasan_slab_alloc+0x59/0x70 [ 40.657195] kmem_cache_alloc+0x16b/0x370 [ 40.657762] vm_area_dup+0x20/0x160 [ 40.658264] __split_vma+0x170/0x950 [ 40.658779] split_vma+0xc6/0x110 [ 40.659278] mprotect_fixup+0x8d2/0xb30 [ 40.659835] do_mprotect_pkey+0x87e/0xd40 [ 40.660415] __x64_sys_mprotect+0x78/0xc0 [ 40.660994] do_syscall_64+0x3f/0x90 [ 40.661521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.662226] [ 40.662464] Freed by task 212: [ 40.662899] kasan_save_stack+0x22/0x50 [ 40.663463] kasan_set_track+0x25/0x30 [ 40.664011] kasan_save_free_info+0x2b/0x50 [ 40.664602] __kasan_slab_free+0x10a/0x190 [ 40.665192] kmem_cache_free+0x10d/0x4d0 [ 40.665754] rcu_core+0x8c8/0x2860 [ 40.666245] __do_softirq+0x1b7/0x7d4 [ 40.666769] [ 40.667004] Last potentially related work creation: [ 40.667669] kasan_save_stack+0x22/0x50 [ 40.668226] __kasan_record_aux_stack+0x8e/0xa0 [ 40.668856] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.669566] remove_vma+0x139/0x170 [ 40.670067] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.670693] do_vmi_munmap+0x1f1/0x2b0 [ 40.671238] __vm_munmap+0x138/0x3a0 [ 40.671757] __x64_sys_munmap+0x59/0x80 [ 40.672315] do_syscall_64+0x3f/0x90 [ 40.672837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.673547] [ 40.673787] The buggy address belongs to the object at ffff88800ed44740 [ 40.673787] which belongs to the cache vm_area_struct of size 168 [ 40.675419] The buggy address is located 88 bytes inside of [ 40.675419] freed 168-byte region [ffff88800ed44740, ffff88800ed447e8) [ 40.676975] [ 40.677215] The buggy address belongs to the physical page: [ 40.677944] page:000000005f9a5085 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed44 [ 40.679153] memcg:ffff88800eddd101 [ 40.679631] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.680349] page_type: 0xffffffff() [ 40.680843] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 40.681857] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eddd101 [ 40.682849] page dumped because: kasan: bad access detected [ 40.683587] [ 40.683817] Memory state around the buggy address: [ 40.684451] ffff88800ed44680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.685369] ffff88800ed44700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.686291] >ffff88800ed44780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.687220] ^ [ 40.687758] ffff88800ed44800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 40.688694] ffff88800ed44880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 40.689618] ================================================================== [ 40.690815] Disabling lock debugging due to kernel taint [ 42.851308] BUG: Bad rss-counter state mm:00000000c73edda6 type:MM_FILEPAGES val:33 [ 42.852325] BUG: Bad rss-counter state mm:00000000c73edda6 type:MM_ANONPAGES val:22 [ 43.356195] BUG: Bad rss-counter state mm:00000000aacc170a type:MM_FILEPAGES val:33 [ 43.357431] BUG: Bad rss-counter state mm:00000000aacc170a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15169' (ECDSA) to the list of known hosts. 2023/06/20 06:16:49 fuzzer started 2023/06/20 06:16:49 dialing manager at localhost:44161 2023/06/20 06:16:49 checking machine... 2023/06/20 06:16:49 checking revisions... [ 44.075987] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:16:49 testing simple program... [ 44.121897] cgroup: Unknown subsys name 'net' [ 44.170548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:16:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888017e5e600 RCX=0000000000000000 RDX=0000000000070002 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff8880142a7c20 RSP=ffff8880142a7b70 R8 =0000000080070002 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff888017e5e600 R12=ffffea00005f9600 R13=ffffea00003bee00 R14=ffff8880087b63c0 R15=ffff888018f76600 RIP=ffffffff8180681b RFL=00000002 [-------] 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 00007f5e8ec8a900 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=00007f5e8e0888c0 CR3=000000000c790000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9ecaf3d581e7855200000000000ae988 XMM05=ecb2ee2b050abd7b0000000000134698 XMM06=806171799158d9670000000000133118 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fb52cfeb0b0 CR3=000000000d7b2000 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=2038343a36313a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a36313a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000