syzkaller login: [ 30.700186] BUG: Bad rss-counter state mm:00000000e5b9fffb type:MM_FILEPAGES val:33 [ 30.701488] BUG: Bad rss-counter state mm:00000000e5b9fffb type:MM_ANONPAGES val:22 [ 30.869103] ================================================================== [ 30.870080] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.871089] Read of size 8 at addr ffff88800dbec880 by task sshd/221 [ 30.871979] [ 30.872238] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.873176] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.874211] Call Trace: [ 30.874553] [ 30.874859] dump_stack_lvl+0x91/0xf0 [ 30.875389] print_report+0xcc/0x620 [ 30.875911] ? __virt_addr_valid+0x102/0x340 [ 30.876504] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.877191] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.877852] kasan_report+0xbe/0xf0 [ 30.878360] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.879028] vma_interval_tree_remove+0xc75/0xec0 [ 30.879697] vma_prepare+0xc54/0x11a0 [ 30.880226] __split_vma+0x5af/0x950 [ 30.880744] ? __pfx___split_vma+0x10/0x10 [ 30.881334] ? find_held_lock+0x2c/0x110 [ 30.881909] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.882526] ? lock_is_held_type+0x9f/0x120 [ 30.883122] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.883794] ? mtree_range_walk+0x632/0x900 [ 30.884402] ? mas_walk+0x5c7/0x7c0 [ 30.884932] do_vmi_munmap+0x1f1/0x2b0 [ 30.885476] mmap_region+0x1f9/0x2660 [ 30.886006] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.886566] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.887345] ? __pfx_lock_acquire+0x10/0x10 [ 30.887955] ? __pfx_mmap_region+0x10/0x10 [ 30.888584] ? security_mmap_addr+0x7d/0xa0 [ 30.889235] ? get_unmapped_area+0x1f5/0x3f0 [ 30.889917] do_mmap+0x854/0xf00 [ 30.890390] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.890919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.891521] ksys_mmap_pgoff+0x3af/0x500 [ 30.892059] do_syscall_64+0x3f/0x90 [ 30.892566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893265] RIP: 0033:0x7f3f1b4a9d82 [ 30.893748] 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 [ 30.896006] RSP: 002b:00007ffc085446b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.897001] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f1b4a9d82 [ 30.897917] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f1a8e3000 [ 30.898818] RBP: 00007f3f1a8e3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.899716] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d1f73ff70 [ 30.900617] R13: 00007ffc085446d0 R14: 00007ffc08544700 R15: 00007ffc08544a60 [ 30.901541] [ 30.901854] [ 30.902084] Allocated by task 214: [ 30.902536] kasan_save_stack+0x22/0x50 [ 30.903073] kasan_set_track+0x25/0x30 [ 30.903597] __kasan_slab_alloc+0x59/0x70 [ 30.904152] kmem_cache_alloc+0x16b/0x370 [ 30.904706] vm_area_dup+0x20/0x160 [ 30.905206] __split_vma+0x170/0x950 [ 30.905706] split_vma+0xc6/0x110 [ 30.906175] mprotect_fixup+0x8d2/0xb30 [ 30.906714] do_mprotect_pkey+0x87e/0xd40 [ 30.907279] __x64_sys_mprotect+0x78/0xc0 [ 30.907826] do_syscall_64+0x3f/0x90 [ 30.908340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.909033] [ 30.909262] Freed by task 214: [ 30.909676] kasan_save_stack+0x22/0x50 [ 30.910221] kasan_set_track+0x25/0x30 [ 30.910744] kasan_save_free_info+0x2b/0x50 [ 30.911309] __kasan_slab_free+0x10a/0x190 [ 30.911882] kmem_cache_free+0x10d/0x4d0 [ 30.912427] rcu_core+0x8c8/0x2860 [ 30.912899] __do_softirq+0x1b7/0x7d4 [ 30.913437] [ 30.913673] Last potentially related work creation: [ 30.914291] kasan_save_stack+0x22/0x50 [ 30.914821] __kasan_record_aux_stack+0x8e/0xa0 [ 30.915431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.916121] remove_vma+0x139/0x170 [ 30.916605] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.917207] do_vmi_munmap+0x1f1/0x2b0 [ 30.917728] __vm_munmap+0x138/0x3a0 [ 30.918225] __x64_sys_munmap+0x59/0x80 [ 30.918752] do_syscall_64+0x3f/0x90 [ 30.919264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.919953] [ 30.920179] The buggy address belongs to the object at ffff88800dbec828 [ 30.920179] which belongs to the cache vm_area_struct of size 168 [ 30.921755] The buggy address is located 88 bytes inside of [ 30.921755] freed 168-byte region [ffff88800dbec828, ffff88800dbec8d0) [ 30.923264] [ 30.923490] The buggy address belongs to the physical page: [ 30.924188] page:00000000e33ab450 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbec [ 30.925337] memcg:ffff88800e7e1d01 [ 30.925793] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.926477] page_type: 0xffffffff() [ 30.926952] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.927923] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7e1d01 [ 30.928876] page dumped because: kasan: bad access detected [ 30.929578] [ 30.929805] Memory state around the buggy address: [ 30.930431] ffff88800dbec780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.931335] ffff88800dbec800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.932258] >ffff88800dbec880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.933184] ^ [ 30.933626] ffff88800dbec900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.934538] ffff88800dbec980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.935448] ================================================================== [ 30.936536] Disabling lock debugging due to kernel taint [ 33.214673] sshd (221) used greatest stack depth: 24120 bytes left [ 33.215976] BUG: Bad rss-counter state mm:00000000d45acddb type:MM_FILEPAGES val:33 [ 33.217737] BUG: Bad rss-counter state mm:00000000d45acddb type:MM_ANONPAGES val:22 [ 33.700137] BUG: Bad rss-counter state mm:0000000052a74619 type:MM_FILEPAGES val:33 [ 33.701121] BUG: Bad rss-counter state mm:0000000052a74619 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40973' (ECDSA) to the list of known hosts. 2023/06/21 00:32:29 fuzzer started 2023/06/21 00:32:29 dialing manager at localhost:36067 2023/06/21 00:32:29 checking machine... 2023/06/21 00:32:29 checking revisions... [ 34.448020] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:32:29 testing simple program... [ 34.497102] cgroup: Unknown subsys name 'net' [ 34.537315] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:32:29 Registers: info registers vcpu 0 RAX=ffffffff8180c705 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff11001d87f1c RSI=ffffffff8180c705 RDI=ffff88800ec3f950 RBP=ffff88800ec3f920 RSP=ffff88800ec3f880 R8 =ffffffff86138e90 R9 =ffff88800ec3f8c8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800ec3f950 R13=0000000000000000 R14=ffff888015ef9b40 R15=0000000000092cc0 RIP=ffffffff813ad474 RFL=00000286 [--S--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 00007fc043a40900 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=00007ffe25c53000 CR3=0000000016e24000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f8c329eaa50 CR3=000000000ca54000 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=f960c48218ae17aefe41c4c97f70cce1 XMM02=ec2efd57dc4c00df000000000011beb8 XMM03=60ffb4a9c7d39465000000000011bf88 XMM04=b01d24a2addb597d00000000000ae988 XMM05=e4cb8bb95a7664b60000000000132d18 XMM06=3237cea204fa986100000000001319c8 XMM07=e042d86d42eb936e0000000000122f88 XMM08=60ffb4a9c7d39465000000000011bf88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000