syzkaller login: [ 36.692772] BUG: Bad rss-counter state mm:000000004be9e52f type:MM_FILEPAGES val:33 [ 36.693745] BUG: Bad rss-counter state mm:000000004be9e52f type:MM_ANONPAGES val:22 [ 36.859916] ================================================================== [ 36.860871] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.861823] Read of size 8 at addr ffff888016fb4880 by task sshd/220 [ 36.862644] [ 36.862941] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.863856] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.864841] Call Trace: [ 36.865166] [ 36.865452] dump_stack_lvl+0x91/0xf0 [ 36.865958] print_report+0xcc/0x620 [ 36.866448] ? __virt_addr_valid+0x102/0x340 [ 36.867034] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.867888] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.868645] kasan_report+0xbe/0xf0 [ 36.869226] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.869977] vma_interval_tree_remove+0xc75/0xec0 [ 36.870716] vma_prepare+0xc54/0x11a0 [ 36.871329] __split_vma+0x5af/0x950 [ 36.871905] ? __pfx___split_vma+0x10/0x10 [ 36.872547] ? find_held_lock+0x2c/0x110 [ 36.873183] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.873868] ? lock_is_held_type+0x9f/0x120 [ 36.874523] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.875272] ? mtree_range_walk+0x632/0x900 [ 36.875932] ? mas_walk+0x5c7/0x7c0 [ 36.876501] do_vmi_munmap+0x1f1/0x2b0 [ 36.877086] mmap_region+0x1f9/0x2660 [ 36.877655] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.878264] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.879138] ? __pfx_lock_acquire+0x10/0x10 [ 36.879787] ? __pfx_mmap_region+0x10/0x10 [ 36.880447] ? security_mmap_addr+0x7d/0xa0 [ 36.881109] ? get_unmapped_area+0x1f5/0x3f0 [ 36.881771] do_mmap+0x854/0xf00 [ 36.882302] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.882915] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.883639] ksys_mmap_pgoff+0x3af/0x500 [ 36.884212] do_syscall_64+0x3f/0x90 [ 36.884528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.884967] RIP: 0033:0x7ff333d4dd82 [ 36.885273] 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 [ 36.886682] RSP: 002b:00007ffda657ea28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.887287] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff333d4dd82 [ 36.887858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff333187000 [ 36.888431] RBP: 00007ff333187000 R08: 0000000000000009 R09: 0000000000001000 [ 36.889014] R10: 0000000000000812 R11: 0000000000000206 R12: 000055671f1a3ec0 [ 36.889559] R13: 00007ffda657ea40 R14: 00007ffda657ea70 R15: 00007ffda657edd0 [ 36.890128] [ 36.890319] [ 36.890455] Allocated by task 213: [ 36.890736] kasan_save_stack+0x22/0x50 [ 36.891059] kasan_set_track+0x25/0x30 [ 36.891382] __kasan_slab_alloc+0x59/0x70 [ 36.891724] kmem_cache_alloc+0x16b/0x370 [ 36.892052] vm_area_dup+0x20/0x160 [ 36.892353] __split_vma+0x170/0x950 [ 36.892655] split_vma+0xc6/0x110 [ 36.892938] mprotect_fixup+0x8d2/0xb30 [ 36.893265] do_mprotect_pkey+0x87e/0xd40 [ 36.893600] __x64_sys_mprotect+0x78/0xc0 [ 36.893937] do_syscall_64+0x3f/0x90 [ 36.894235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.894651] [ 36.894791] Freed by task 213: [ 36.895042] kasan_save_stack+0x22/0x50 [ 36.895380] kasan_set_track+0x25/0x30 [ 36.895695] kasan_save_free_info+0x2b/0x50 [ 36.896037] __kasan_slab_free+0x10a/0x190 [ 36.896377] kmem_cache_free+0x10d/0x4d0 [ 36.896699] rcu_core+0x8c8/0x2860 [ 36.896985] __do_softirq+0x1b7/0x7d4 [ 36.897301] [ 36.897438] Last potentially related work creation: [ 36.897819] kasan_save_stack+0x22/0x50 [ 36.898141] __kasan_record_aux_stack+0x8e/0xa0 [ 36.898512] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.898939] remove_vma+0x139/0x170 [ 36.899242] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.899600] do_vmi_munmap+0x1f1/0x2b0 [ 36.899907] __vm_munmap+0x138/0x3a0 [ 36.900204] __x64_sys_munmap+0x59/0x80 [ 36.900528] do_syscall_64+0x3f/0x90 [ 36.900837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.901253] [ 36.901389] The buggy address belongs to the object at ffff888016fb4828 [ 36.901389] which belongs to the cache vm_area_struct of size 168 [ 36.902344] The buggy address is located 88 bytes inside of [ 36.902344] freed 168-byte region [ffff888016fb4828, ffff888016fb48d0) [ 36.903269] [ 36.903412] The buggy address belongs to the physical page: [ 36.903845] page:00000000484e9b7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fb4 [ 36.904553] memcg:ffff888019fb9401 [ 36.904823] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.905239] page_type: 0xffffffff() [ 36.905527] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.906145] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fb9401 [ 36.906733] page dumped because: kasan: bad access detected [ 36.907177] [ 36.907321] Memory state around the buggy address: [ 36.907699] ffff888016fb4780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 36.908244] ffff888016fb4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.908793] >ffff888016fb4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.909361] ^ [ 36.909635] ffff888016fb4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.910198] ffff888016fb4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 36.910750] ================================================================== [ 36.911771] Disabling lock debugging due to kernel taint [ 39.399576] BUG: Bad rss-counter state mm:00000000b314a031 type:MM_FILEPAGES val:33 [ 39.400655] BUG: Bad rss-counter state mm:00000000b314a031 type:MM_ANONPAGES val:22 [ 39.893869] BUG: Bad rss-counter state mm:000000003487f8a2 type:MM_FILEPAGES val:33 [ 39.894912] BUG: Bad rss-counter state mm:000000003487f8a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22347' (ECDSA) to the list of known hosts. 2023/06/19 12:25:59 fuzzer started 2023/06/19 12:25:59 dialing manager at localhost:44161 2023/06/19 12:25:59 checking machine... 2023/06/19 12:25:59 checking revisions... [ 40.630183] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:25:59 testing simple program... [ 40.676987] cgroup: Unknown subsys name 'net' [ 40.721971] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:25:54 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000fe0 RCX=ffffffff8226ff67 RDX=0000000000000000 RSI=0000000000000fe0 RDI=ffff88801b874420 RBP=0000000000000fe0 RSP=ffff88800da87d10 R8 =0000000000000001 R9 =ffffed100370ea7f R10=ffff88801b8753ff R11=0000000000000000 R12=00007f5ac7521b31 R13=ffff88801b874420 R14=00007f5ac7521b31 R15=ffffffff85d3ce80 RIP=ffffffff8184cc96 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 00007f5ac7546900 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=00007f5ac7afb650 CR3=00000000096a8000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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=0000000000000001 RCX=ffffffff8613fda0 RDX=1ffff1100d9e1357 RSI=1ffff1100d9e1355 RDI=ffff88806cf09ab8 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff8613fda4 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000002244e R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88801459ff40 R15=ffff88806cf09a50 RIP=ffffffff811310f5 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 00007ff88949b900 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=00007ff88890d1a0 CR3=000000000d618000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c47f6e5373ba240e00000000000ae988 XMM05=7ba3e0dfb4dd386b0000000000135728 XMM06=4fda316b135da52b0000000000134518 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000