syzkaller login: [ 37.901648] BUG: Bad rss-counter state mm:0000000074cdd430 type:MM_FILEPAGES val:33 [ 37.902758] BUG: Bad rss-counter state mm:0000000074cdd430 type:MM_ANONPAGES val:22 [ 38.056774] ================================================================== [ 38.057842] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.058968] Read of size 8 at addr ffff88800ebd4228 by task sshd/220 [ 38.059965] [ 38.060186] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.061042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.062000] Call Trace: [ 38.062313] [ 38.062608] dump_stack_lvl+0x91/0xf0 [ 38.063093] print_report+0xcc/0x620 [ 38.063583] ? __virt_addr_valid+0x102/0x340 [ 38.064128] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.064739] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.065343] kasan_report+0xbe/0xf0 [ 38.065813] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.066433] vma_interval_tree_remove+0xc75/0xec0 [ 38.067040] vma_prepare+0xc54/0x11a0 [ 38.067514] __split_vma+0x5af/0x950 [ 38.067981] ? __pfx___split_vma+0x10/0x10 [ 38.068505] ? find_held_lock+0x2c/0x110 [ 38.069019] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.069574] ? lock_is_held_type+0x9f/0x120 [ 38.070107] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.070730] ? mtree_range_walk+0x632/0x900 [ 38.071275] ? mas_walk+0x5c7/0x7c0 [ 38.071746] do_vmi_munmap+0x1f1/0x2b0 [ 38.072229] mmap_region+0x1f9/0x2660 [ 38.072707] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.073214] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.073935] ? __pfx_lock_acquire+0x10/0x10 [ 38.074466] ? __pfx_mmap_region+0x10/0x10 [ 38.075008] ? security_mmap_addr+0x7d/0xa0 [ 38.075541] ? get_unmapped_area+0x1f5/0x3f0 [ 38.076086] do_mmap+0x854/0xf00 [ 38.076532] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.077023] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.077584] ksys_mmap_pgoff+0x3af/0x500 [ 38.078082] do_syscall_64+0x3f/0x90 [ 38.078559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.079229] RIP: 0033:0x7fbba6bb6d82 [ 38.079678] 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 [ 38.081792] RSP: 002b:00007fffce6f4918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.082715] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbba6bb6d82 [ 38.083559] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbba5ff0000 [ 38.084393] RBP: 00007fbba5ff0000 R08: 0000000000000009 R09: 0000000000001000 [ 38.085233] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e78c94ec0 [ 38.086078] R13: 00007fffce6f4930 R14: 00007fffce6f4960 R15: 00007fffce6f4cc0 [ 38.086927] [ 38.087222] [ 38.087435] Allocated by task 213: [ 38.087861] kasan_save_stack+0x22/0x50 [ 38.088360] kasan_set_track+0x25/0x30 [ 38.088848] __kasan_slab_alloc+0x59/0x70 [ 38.089365] kmem_cache_alloc+0x16b/0x370 [ 38.089876] vm_area_dup+0x20/0x160 [ 38.090325] __split_vma+0x170/0x950 [ 38.090810] split_vma+0xc6/0x110 [ 38.091250] mprotect_fixup+0x8d2/0xb30 [ 38.091745] do_mprotect_pkey+0x87e/0xd40 [ 38.092260] __x64_sys_mprotect+0x78/0xc0 [ 38.092774] do_syscall_64+0x3f/0x90 [ 38.093247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.093883] [ 38.094095] Freed by task 213: [ 38.094487] kasan_save_stack+0x22/0x50 [ 38.094993] kasan_set_track+0x25/0x30 [ 38.095485] kasan_save_free_info+0x2b/0x50 [ 38.096011] __kasan_slab_free+0x10a/0x190 [ 38.096540] kmem_cache_free+0x10d/0x4d0 [ 38.097044] rcu_core+0x8c8/0x2860 [ 38.097484] __do_softirq+0x1b7/0x7d4 [ 38.097954] [ 38.098166] Last potentially related work creation: [ 38.098761] kasan_save_stack+0x22/0x50 [ 38.099258] __kasan_record_aux_stack+0x8e/0xa0 [ 38.099828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.100457] remove_vma+0x139/0x170 [ 38.101000] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.101563] do_vmi_munmap+0x1f1/0x2b0 [ 38.102044] __vm_munmap+0x138/0x3a0 [ 38.102505] __x64_sys_munmap+0x59/0x80 [ 38.103002] do_syscall_64+0x3f/0x90 [ 38.103474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.104102] [ 38.104314] Second to last potentially related work creation: [ 38.104988] kasan_save_stack+0x22/0x50 [ 38.105482] __kasan_record_aux_stack+0x8e/0xa0 [ 38.106049] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.106698] remove_vma+0x139/0x170 [ 38.107143] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.107692] do_vmi_munmap+0x1f1/0x2b0 [ 38.108170] mmap_region+0x1f9/0x2660 [ 38.108643] do_mmap+0x854/0xf00 [ 38.109070] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.109553] ksys_mmap_pgoff+0x3af/0x500 [ 38.110050] do_syscall_64+0x3f/0x90 [ 38.110521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.111156] [ 38.111368] The buggy address belongs to the object at ffff88800ebd41d0 [ 38.111368] which belongs to the cache vm_area_struct of size 168 [ 38.112816] The buggy address is located 88 bytes inside of [ 38.112816] freed 168-byte region [ffff88800ebd41d0, ffff88800ebd4278) [ 38.114192] [ 38.114405] The buggy address belongs to the physical page: [ 38.115072] page:000000003585a266 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebd4 [ 38.116138] memcg:ffff8880097f5701 [ 38.116565] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.117253] page_type: 0xffffffff() [ 38.117701] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 38.118627] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097f5701 [ 38.119525] page dumped because: kasan: bad access detected [ 38.120179] [ 38.120397] Memory state around the buggy address: [ 38.120965] ffff88800ebd4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.121805] ffff88800ebd4180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.122660] >ffff88800ebd4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.123507] ^ [ 38.124062] ffff88800ebd4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.124906] ffff88800ebd4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.125738] ================================================================== [ 38.126664] Disabling lock debugging due to kernel taint [ 40.366996] BUG: Bad rss-counter state mm:00000000b8b21107 type:MM_FILEPAGES val:31 [ 40.367985] BUG: Bad rss-counter state mm:00000000b8b21107 type:MM_ANONPAGES val:22 [ 40.847562] BUG: Bad rss-counter state mm:000000009b12de44 type:MM_FILEPAGES val:33 [ 40.848720] BUG: Bad rss-counter state mm:000000009b12de44 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56834' (ECDSA) to the list of known hosts. 2023/06/20 02:27:42 fuzzer started 2023/06/20 02:27:43 dialing manager at localhost:44161 2023/06/20 02:27:43 checking machine... 2023/06/20 02:27:43 checking revisions... [ 41.586952] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:27:43 testing simple program... [ 41.630965] cgroup: Unknown subsys name 'net' [ 41.688889] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:27:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110028b2ea3 RSI=ffffffff81acbf17 RDI=ffff888014597518 RBP=ffff8880145975b0 RSP=ffff8880145974a8 R8 =0000000000000001 R9 =ffff888014597558 R10=0000000000038001 R11=000000000002f6f5 R12=ffff8880145975e0 R13=0000000000000000 R14=ffff888014670000 R15=ffff888014597518 RIP=ffffffff8113060b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1825cce900 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=00007f1825160b80 CR3=000000000c69c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ff806182c8b4f65300000000000ae988 XMM05=4904a38d40cf68f30000000000136020 XMM06=c291bd5c70af25b90000000000134e10 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000004 RBX=00000000000000e1 RCX=0000000000000004 RDX=000000000000231c RSI=0000000000000000 RDI=00007ffc7e8f26c0 RBP=00000000000000f4 RSP=fffffe0000049fd0 R8 =00007ffc7e8f6d64 R9 =00007ffc7e8f6c20 R10=00007f5461818a57 R11=0000000000000000 R12=0000000000000008 R13=00007ffc7e8f26c0 R14=00007ffc7e8f6e90 R15=0000000000000452 RIP=ffffffff84601260 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5460cc8900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc7e8f269c CR3=000000000ce5a000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000