syzkaller login: [ 40.610346] BUG: Bad rss-counter state mm:0000000077886fa3 type:MM_FILEPAGES val:33 [ 40.612129] BUG: Bad rss-counter state mm:0000000077886fa3 type:MM_ANONPAGES val:22 [ 40.772003] ================================================================== [ 40.773073] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.774173] Read of size 8 at addr ffff88800fe4f798 by task sshd/222 [ 40.775241] [ 40.775484] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.776339] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.777333] Call Trace: [ 40.777654] [ 40.777935] dump_stack_lvl+0x91/0xf0 [ 40.778425] print_report+0xcc/0x620 [ 40.778907] ? __virt_addr_valid+0x102/0x340 [ 40.779455] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.780067] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.780695] kasan_report+0xbe/0xf0 [ 40.781168] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.781781] vma_interval_tree_remove+0xc75/0xec0 [ 40.782386] vma_prepare+0xc54/0x11a0 [ 40.782862] __split_vma+0x5af/0x950 [ 40.783337] ? __pfx___split_vma+0x10/0x10 [ 40.783861] ? find_held_lock+0x2c/0x110 [ 40.784380] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.784961] ? lock_is_held_type+0x9f/0x120 [ 40.785492] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.786100] ? mtree_range_walk+0x632/0x900 [ 40.786648] ? mas_walk+0x5c7/0x7c0 [ 40.787126] do_vmi_munmap+0x1f1/0x2b0 [ 40.787617] mmap_region+0x1f9/0x2660 [ 40.788099] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.788615] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.789324] ? __pfx_lock_acquire+0x10/0x10 [ 40.789861] ? __pfx_mmap_region+0x10/0x10 [ 40.790390] ? security_mmap_addr+0x7d/0xa0 [ 40.790915] ? get_unmapped_area+0x1f5/0x3f0 [ 40.791463] do_mmap+0x854/0xf00 [ 40.791899] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.792388] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.792959] ksys_mmap_pgoff+0x3af/0x500 [ 40.793460] do_syscall_64+0x3f/0x90 [ 40.793936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.794570] RIP: 0033:0x7fc7a531bd82 [ 40.795021] 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 [ 40.797168] RSP: 002b:00007fffc8ada7a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.798076] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc7a531bd82 [ 40.798922] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc7a4755000 [ 40.799774] RBP: 00007fc7a4755000 R08: 0000000000000009 R09: 0000000000001000 [ 40.800634] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561356aefec0 [ 40.801471] R13: 00007fffc8ada7c0 R14: 00007fffc8ada7f0 R15: 00007fffc8adab50 [ 40.802320] [ 40.802613] [ 40.802826] Allocated by task 215: [ 40.803252] kasan_save_stack+0x22/0x50 [ 40.803759] kasan_set_track+0x25/0x30 [ 40.804250] __kasan_slab_alloc+0x59/0x70 [ 40.804775] kmem_cache_alloc+0x16b/0x370 [ 40.805290] vm_area_dup+0x20/0x160 [ 40.805740] __split_vma+0x170/0x950 [ 40.806205] split_vma+0xc6/0x110 [ 40.806641] mprotect_fixup+0x8d2/0xb30 [ 40.807144] do_mprotect_pkey+0x87e/0xd40 [ 40.807665] __x64_sys_mprotect+0x78/0xc0 [ 40.808184] do_syscall_64+0x3f/0x90 [ 40.808674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.809316] [ 40.809532] Freed by task 215: [ 40.809921] kasan_save_stack+0x22/0x50 [ 40.810427] kasan_set_track+0x25/0x30 [ 40.810921] kasan_save_free_info+0x2b/0x50 [ 40.811446] __kasan_slab_free+0x10a/0x190 [ 40.811990] kmem_cache_free+0x10d/0x4d0 [ 40.812495] rcu_core+0x8c8/0x2860 [ 40.812955] __do_softirq+0x1b7/0x7d4 [ 40.813434] [ 40.813648] Last potentially related work creation: [ 40.814232] kasan_save_stack+0x22/0x50 [ 40.814731] __kasan_record_aux_stack+0x8e/0xa0 [ 40.815313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.815957] remove_vma+0x139/0x170 [ 40.816476] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.817052] do_vmi_munmap+0x1f1/0x2b0 [ 40.817538] __vm_munmap+0x138/0x3a0 [ 40.818007] __x64_sys_munmap+0x59/0x80 [ 40.818514] do_syscall_64+0x3f/0x90 [ 40.818984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.819626] [ 40.819841] The buggy address belongs to the object at ffff88800fe4f740 [ 40.819841] which belongs to the cache vm_area_struct of size 168 [ 40.821324] The buggy address is located 88 bytes inside of [ 40.821324] freed 168-byte region [ffff88800fe4f740, ffff88800fe4f7e8) [ 40.822738] [ 40.822952] The buggy address belongs to the physical page: [ 40.823613] page:00000000262b4074 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe4f [ 40.824697] memcg:ffff888015fb3d01 [ 40.825125] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.825762] page_type: 0xffffffff() [ 40.826219] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.827140] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015fb3d01 [ 40.828040] page dumped because: kasan: bad access detected [ 40.828717] [ 40.828932] Memory state around the buggy address: [ 40.829507] ffff88800fe4f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.830361] ffff88800fe4f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.831219] >ffff88800fe4f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.832070] ^ [ 40.832564] ffff88800fe4f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.833417] ffff88800fe4f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.834261] ================================================================== [ 40.835209] Disabling lock debugging due to kernel taint [ 43.411159] BUG: Bad rss-counter state mm:000000004a351774 type:MM_FILEPAGES val:33 [ 43.412203] BUG: Bad rss-counter state mm:000000004a351774 type:MM_ANONPAGES val:22 [ 43.866958] BUG: Bad rss-counter state mm:00000000cda756a7 type:MM_FILEPAGES val:33 [ 43.867940] BUG: Bad rss-counter state mm:00000000cda756a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45396' (ECDSA) to the list of known hosts. 2023/06/19 13:04:16 fuzzer started 2023/06/19 13:04:16 dialing manager at localhost:44161 2023/06/19 13:04:16 checking machine... 2023/06/19 13:04:16 checking revisions... [ 44.506832] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:04:16 testing simple program... [ 44.548656] cgroup: Unknown subsys name 'net' [ 44.581429] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:04:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000ffffffff RCX=ffffffff83874378 RDX=ffff88801684b680 RSI=0000000000000004 RDI=ffff888008f54080 RBP=ffff888008f54000 RSP=ffff888016d77b10 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008f54080 R13=ffff888016fd9c80 R14=00000000000000f4 R15=0000000000000001 RIP=ffffffff8180fd58 RFL=00000293 [--S-A-C] 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 00007f3f2e349900 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=00007fff58990000 CR3=000000000d966000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f300d21a420 CR3=0000000008eee000 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=9fe3840df8b926b694436fda4c0e6078 XMM02=000000000011c330eff9b2d0a8fce9cb XMM03=000000000011c4002c67c8bc2e329bc3 XMM04=f08a7625cf11dbd500000000000ae988 XMM05=59d5b690e0af863b00000000001336e8 XMM06=00c3ffa147b8d8570000000000133570 XMM07=e042d86d42eb936e0000000000123d78 XMM08=3b660478bb57fe94000000000011c400 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000