syzkaller login: [ 61.193856] BUG: Bad rss-counter state mm:000000001206692d type:MM_FILEPAGES val:33 [ 61.195157] BUG: Bad rss-counter state mm:000000001206692d type:MM_ANONPAGES val:22 [ 61.345347] ================================================================== [ 61.346042] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.346755] Read of size 8 at addr ffff88800e4ac228 by task sshd/219 [ 61.347341] [ 61.347503] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.348151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.348913] Call Trace: [ 61.349155] [ 61.349372] dump_stack_lvl+0x91/0xf0 [ 61.349746] print_report+0xcc/0x620 [ 61.350215] ? __virt_addr_valid+0x102/0x340 [ 61.350649] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.351117] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.351585] kasan_report+0xbe/0xf0 [ 61.351950] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.352448] vma_interval_tree_remove+0xc75/0xec0 [ 61.352902] vma_prepare+0xc54/0x11a0 [ 61.353266] __split_vma+0x5af/0x950 [ 61.353625] ? __pfx___split_vma+0x10/0x10 [ 61.354025] ? find_held_lock+0x2c/0x110 [ 61.354424] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.354860] ? lock_is_held_type+0x9f/0x120 [ 61.355266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.355732] ? mtree_range_walk+0x632/0x900 [ 61.356164] ? mas_walk+0x5c7/0x7c0 [ 61.356538] do_vmi_munmap+0x1f1/0x2b0 [ 61.356907] mmap_region+0x1f9/0x2660 [ 61.357277] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.357669] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.358207] ? __pfx_lock_acquire+0x10/0x10 [ 61.358606] ? __pfx_mmap_region+0x10/0x10 [ 61.359006] ? security_mmap_addr+0x7d/0xa0 [ 61.359417] ? get_unmapped_area+0x1f5/0x3f0 [ 61.359833] do_mmap+0x854/0xf00 [ 61.360161] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.360556] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.360980] ksys_mmap_pgoff+0x3af/0x500 [ 61.361361] do_syscall_64+0x3f/0x90 [ 61.361729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.362228] RIP: 0033:0x7fdc176ebd82 [ 61.362577] 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 [ 61.364212] RSP: 002b:00007ffffb4e0f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.364930] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc176ebd82 [ 61.365577] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc16b25000 [ 61.366223] RBP: 00007fdc16b25000 R08: 0000000000000009 R09: 0000000000001000 [ 61.366883] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a2236ef70 [ 61.367538] R13: 00007ffffb4e0f70 R14: 00007ffffb4e0fa0 R15: 00007ffffb4e1300 [ 61.368199] [ 61.368429] [ 61.368599] Allocated by task 212: [ 61.368931] kasan_save_stack+0x22/0x50 [ 61.369324] kasan_set_track+0x25/0x30 [ 61.369697] __kasan_slab_alloc+0x59/0x70 [ 61.370097] kmem_cache_alloc+0x16b/0x370 [ 61.370489] vm_area_dup+0x20/0x160 [ 61.370831] __split_vma+0x170/0x950 [ 61.371183] split_vma+0xc6/0x110 [ 61.371529] mprotect_fixup+0x8d2/0xb30 [ 61.371909] do_mprotect_pkey+0x87e/0xd40 [ 61.372311] __x64_sys_mprotect+0x78/0xc0 [ 61.372734] do_syscall_64+0x3f/0x90 [ 61.373104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.373605] [ 61.373768] Freed by task 212: [ 61.374077] kasan_save_stack+0x22/0x50 [ 61.374458] kasan_set_track+0x25/0x30 [ 61.374831] kasan_save_free_info+0x2b/0x50 [ 61.375247] __kasan_slab_free+0x10a/0x190 [ 61.375661] kmem_cache_free+0x10d/0x4d0 [ 61.376047] rcu_core+0x8c8/0x2860 [ 61.376409] __do_softirq+0x1b7/0x7d4 [ 61.376770] [ 61.376932] Last potentially related work creation: [ 61.377383] kasan_save_stack+0x22/0x50 [ 61.377764] __kasan_record_aux_stack+0x8e/0xa0 [ 61.378218] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.378710] remove_vma+0x139/0x170 [ 61.379069] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.379494] do_vmi_munmap+0x1f1/0x2b0 [ 61.379878] __vm_munmap+0x138/0x3a0 [ 61.380234] __x64_sys_munmap+0x59/0x80 [ 61.380618] do_syscall_64+0x3f/0x90 [ 61.380986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.381493] [ 61.381655] The buggy address belongs to the object at ffff88800e4ac1d0 [ 61.381655] which belongs to the cache vm_area_struct of size 168 [ 61.382778] The buggy address is located 88 bytes inside of [ 61.382778] freed 168-byte region [ffff88800e4ac1d0, ffff88800e4ac278) [ 61.383851] [ 61.384013] The buggy address belongs to the physical page: [ 61.384536] page:00000000deb30410 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4ac [ 61.385371] memcg:ffff8880168a2101 [ 61.385705] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.386213] page_type: 0xffffffff() [ 61.386562] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.387262] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168a2101 [ 61.387963] page dumped because: kasan: bad access detected [ 61.388471] [ 61.388634] Memory state around the buggy address: [ 61.389078] ffff88800e4ac100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.389740] ffff88800e4ac180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 61.390400] >ffff88800e4ac200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 61.391054] ^ [ 61.391511] ffff88800e4ac280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 61.392176] ffff88800e4ac300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 61.392855] ================================================================== [ 61.393550] Disabling lock debugging due to kernel taint [ 64.020595] BUG: Bad rss-counter state mm:00000000cca7dd67 type:MM_FILEPAGES val:33 [ 64.021386] BUG: Bad rss-counter state mm:00000000cca7dd67 type:MM_ANONPAGES val:22 [ 64.416083] BUG: Bad rss-counter state mm:0000000071fc5e17 type:MM_FILEPAGES val:33 [ 64.417012] BUG: Bad rss-counter state mm:0000000071fc5e17 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28856' (ECDSA) to the list of known hosts. 2023/06/20 16:20:22 fuzzer started 2023/06/20 16:20:22 dialing manager at localhost:36067 2023/06/20 16:20:22 checking machine... 2023/06/20 16:20:22 checking revisions... [ 65.060231] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:20:22 testing simple program... [ 65.103935] cgroup: Unknown subsys name 'net' [ 65.155419] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:20:22 Registers: info registers vcpu 0 RAX=1ffff11001aa1c59 RBX=ffff88800d50e2c8 RCX=1ffff11001aa1c60 RDX=1ffff11001e112f1 RSI=ffffffff87b89f80 RDI=ffff88800f089788 RBP=ffff88800d50e2d0 RSP=ffff888015b37828 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800f089788 R13=dffffc0000000000 R14=ffff88800f089768 R15=ffff88800f089720 RIP=ffffffff844d3e4c RFL=00000092 [--S-A--] 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 00007fa50b3fa900 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=000056017c70d568 CR3=0000000016670000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019558000 RCX=0000000000000000 RDX=1ffffffff0b7d638 RSI=ffffffff83c13dcf RDI=ffff88800eb29828 RBP=ffff88800eb29800 RSP=ffff888015b37d78 R8 =0000000000000001 R9 =ffffed10032ab035 R10=ffff8880195581af R11=00000000000b6a61 R12=ffffffff85beb1c0 R13=ffff888019558018 R14=0000000000000000 R15=ffff8880195580c0 RIP=ffffffff83c13e07 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 00007fa50b3fa900 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=00007fffce68f9f8 CR3=0000000016670000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000