syzkaller login: [ 31.448295] BUG: Bad rss-counter state mm:00000000b6fb59da type:MM_FILEPAGES val:33 [ 31.449330] BUG: Bad rss-counter state mm:00000000b6fb59da type:MM_ANONPAGES val:22 [ 31.607898] ================================================================== [ 31.609005] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.609957] Read of size 8 at addr ffff88801a008968 by task sshd/221 [ 31.610909] [ 31.611130] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.611993] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.613016] Call Trace: [ 31.613337] [ 31.613621] dump_stack_lvl+0x91/0xf0 [ 31.614107] print_report+0xcc/0x620 [ 31.614585] ? __virt_addr_valid+0x102/0x340 [ 31.615155] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.615771] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.616400] kasan_report+0xbe/0xf0 [ 31.616902] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.617528] vma_interval_tree_remove+0xc75/0xec0 [ 31.618120] vma_prepare+0xc54/0x11a0 [ 31.618593] __split_vma+0x5af/0x950 [ 31.619064] ? __pfx___split_vma+0x10/0x10 [ 31.619589] ? find_held_lock+0x2c/0x110 [ 31.620107] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.620687] ? lock_is_held_type+0x9f/0x120 [ 31.621225] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.621838] ? mtree_range_walk+0x632/0x900 [ 31.622382] ? mas_walk+0x5c7/0x7c0 [ 31.622852] do_vmi_munmap+0x1f1/0x2b0 [ 31.623380] mmap_region+0x1f9/0x2660 [ 31.623890] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.624415] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.625153] ? __pfx_lock_acquire+0x10/0x10 [ 31.625701] ? __pfx_mmap_region+0x10/0x10 [ 31.626248] ? security_mmap_addr+0x7d/0xa0 [ 31.626787] ? get_unmapped_area+0x1f5/0x3f0 [ 31.627329] do_mmap+0x854/0xf00 [ 31.627766] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.628260] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.628843] ksys_mmap_pgoff+0x3af/0x500 [ 31.629344] do_syscall_64+0x3f/0x90 [ 31.629820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.630466] RIP: 0033:0x7faf1445cd82 [ 31.630941] 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 [ 31.633115] RSP: 002b:00007ffd024835e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.634053] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf1445cd82 [ 31.634927] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf13896000 [ 31.635776] RBP: 00007faf13896000 R08: 0000000000000009 R09: 0000000000001000 [ 31.636610] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f1fda38ec0 [ 31.637457] R13: 00007ffd02483600 R14: 00007ffd02483630 R15: 00007ffd02483990 [ 31.638298] [ 31.638591] [ 31.638805] Allocated by task 214: [ 31.639250] kasan_save_stack+0x22/0x50 [ 31.639766] kasan_set_track+0x25/0x30 [ 31.640270] __kasan_slab_alloc+0x59/0x70 [ 31.640797] kmem_cache_alloc+0x16b/0x370 [ 31.641313] vm_area_dup+0x20/0x160 [ 31.641767] __split_vma+0x170/0x950 [ 31.642230] split_vma+0xc6/0x110 [ 31.642665] mprotect_fixup+0x8d2/0xb30 [ 31.643164] do_mprotect_pkey+0x87e/0xd40 [ 31.643682] __x64_sys_mprotect+0x78/0xc0 [ 31.644199] do_syscall_64+0x3f/0x90 [ 31.644673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.645310] [ 31.645524] Freed by task 214: [ 31.645913] kasan_save_stack+0x22/0x50 [ 31.646423] kasan_set_track+0x25/0x30 [ 31.646915] kasan_save_free_info+0x2b/0x50 [ 31.647445] __kasan_slab_free+0x10a/0x190 [ 31.647970] kmem_cache_free+0x10d/0x4d0 [ 31.648475] rcu_core+0x8c8/0x2860 [ 31.648938] __do_softirq+0x1b7/0x7d4 [ 31.649412] [ 31.649624] Last potentially related work creation: [ 31.650200] kasan_save_stack+0x22/0x50 [ 31.650695] __kasan_record_aux_stack+0x8e/0xa0 [ 31.651266] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.651970] remove_vma+0x139/0x170 [ 31.652417] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.652980] do_vmi_munmap+0x1f1/0x2b0 [ 31.653460] __vm_munmap+0x138/0x3a0 [ 31.653922] __x64_sys_munmap+0x59/0x80 [ 31.654418] do_syscall_64+0x3f/0x90 [ 31.654890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.655526] [ 31.655740] The buggy address belongs to the object at ffff88801a008910 [ 31.655740] which belongs to the cache vm_area_struct of size 168 [ 31.657213] The buggy address is located 88 bytes inside of [ 31.657213] freed 168-byte region [ffff88801a008910, ffff88801a0089b8) [ 31.658608] [ 31.658822] The buggy address belongs to the physical page: [ 31.659474] page:000000005f085862 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a008 [ 31.660554] memcg:ffff88800c755f01 [ 31.660984] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.661627] page_type: 0xffffffff() [ 31.662077] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.662986] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c755f01 [ 31.663890] page dumped because: kasan: bad access detected [ 31.664543] [ 31.664780] Memory state around the buggy address: [ 31.665360] ffff88801a008800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.666204] ffff88801a008880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.667060] >ffff88801a008900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.667907] ^ [ 31.668691] ffff88801a008980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.669545] ffff88801a008a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.670385] ================================================================== [ 31.671287] Disabling lock debugging due to kernel taint [ 33.639125] BUG: Bad rss-counter state mm:00000000361a5c38 type:MM_FILEPAGES val:33 [ 33.640089] BUG: Bad rss-counter state mm:00000000361a5c38 type:MM_ANONPAGES val:22 [ 34.113607] BUG: Bad rss-counter state mm:000000005d6692ef type:MM_FILEPAGES val:33 [ 34.114660] BUG: Bad rss-counter state mm:000000005d6692ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31406' (ECDSA) to the list of known hosts. 2023/06/20 11:50:20 fuzzer started 2023/06/20 11:50:20 dialing manager at localhost:36067 2023/06/20 11:50:20 checking machine... 2023/06/20 11:50:20 checking revisions... [ 34.848925] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:50:20 testing simple program... [ 34.896841] cgroup: Unknown subsys name 'net' [ 34.946348] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:50:20 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=00007fa73d2cdf30 CR3=000000000c504000 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=2030323a30353a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a30353a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff8880101f7b40 RCX=0000000080000000 RDX=1ffff1100203ef9a RSI=ffffffff844c6884 RDI=ffff8880101f7cd0 RBP=ffff8880101f7ca8 RSP=ffff8880101f7aa8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=dffffc0000000000 R13=ffffed100203ef9c R14=ffff8880101f7ce1 R15=dffffc0000000000 RIP=ffffffff814c0871 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 00007f62abce7900 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=00007f62abcc6020 CR3=000000000ea3c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000