syzkaller login: [ 36.605502] BUG: Bad rss-counter state mm:00000000370f76d6 type:MM_FILEPAGES val:33 [ 36.606714] BUG: Bad rss-counter state mm:00000000370f76d6 type:MM_ANONPAGES val:22 [ 36.647161] ================================================================== [ 36.648216] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.649180] Read of size 8 at addr ffff888009ec34e0 by task sshd/219 [ 36.649969] [ 36.650185] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.651069] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.652044] Call Trace: [ 36.652396] [ 36.652684] dump_stack_lvl+0x91/0xf0 [ 36.653176] print_report+0xcc/0x620 [ 36.653660] ? __virt_addr_valid+0x102/0x340 [ 36.654207] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.654837] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.655462] kasan_report+0xbe/0xf0 [ 36.655936] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.656596] vma_interval_tree_remove+0xc75/0xec0 [ 36.657204] vma_prepare+0xc54/0x11a0 [ 36.657684] __split_vma+0x5af/0x950 [ 36.658162] ? __pfx___split_vma+0x10/0x10 [ 36.658712] ? find_held_lock+0x2c/0x110 [ 36.659277] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.659842] ? lock_is_held_type+0x9f/0x120 [ 36.660426] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.661049] ? mtree_range_walk+0x632/0x900 [ 36.661613] ? mas_walk+0x5c7/0x7c0 [ 36.662094] do_vmi_munmap+0x1f1/0x2b0 [ 36.662600] mmap_region+0x1f9/0x2660 [ 36.663101] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.663615] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.664352] ? __pfx_lock_acquire+0x10/0x10 [ 36.664917] ? __pfx_mmap_region+0x10/0x10 [ 36.665459] ? security_mmap_addr+0x7d/0xa0 [ 36.666004] ? get_unmapped_area+0x1f5/0x3f0 [ 36.666557] do_mmap+0x854/0xf00 [ 36.667029] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.667533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.668104] ksys_mmap_pgoff+0x3af/0x500 [ 36.668660] do_syscall_64+0x3f/0x90 [ 36.669153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.669806] RIP: 0033:0x7f99a09e3d82 [ 36.670272] 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 [ 36.672507] RSP: 002b:00007ffca0e86378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.673431] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99a09e3d82 [ 36.674299] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f999fe1d000 [ 36.675182] RBP: 00007f999fe1d000 R08: 0000000000000009 R09: 0000000000001000 [ 36.676046] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623d762aec0 [ 36.676951] R13: 00007ffca0e86390 R14: 00007ffca0e863c0 R15: 00007ffca0e86720 [ 36.677821] [ 36.678123] [ 36.678344] Allocated by task 212: [ 36.678781] kasan_save_stack+0x22/0x50 [ 36.679297] kasan_set_track+0x25/0x30 [ 36.679802] __kasan_slab_alloc+0x59/0x70 [ 36.680357] kmem_cache_alloc+0x16b/0x370 [ 36.680902] vm_area_dup+0x20/0x160 [ 36.681365] __split_vma+0x170/0x950 [ 36.681839] split_vma+0xc6/0x110 [ 36.682284] mprotect_fixup+0x8d2/0xb30 [ 36.682803] do_mprotect_pkey+0x87e/0xd40 [ 36.683361] __x64_sys_mprotect+0x78/0xc0 [ 36.683897] do_syscall_64+0x3f/0x90 [ 36.684415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.685072] [ 36.685291] Freed by task 212: [ 36.685686] kasan_save_stack+0x22/0x50 [ 36.686189] kasan_set_track+0x25/0x30 [ 36.686697] kasan_save_free_info+0x2b/0x50 [ 36.687251] __kasan_slab_free+0x10a/0x190 [ 36.687796] kmem_cache_free+0x10d/0x4d0 [ 36.688311] rcu_core+0x8c8/0x2860 [ 36.688794] __do_softirq+0x1b7/0x7d4 [ 36.689281] [ 36.689497] Last potentially related work creation: [ 36.690091] kasan_save_stack+0x22/0x50 [ 36.690604] __kasan_record_aux_stack+0x8e/0xa0 [ 36.691209] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.691856] remove_vma+0x139/0x170 [ 36.692328] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.692923] do_vmi_munmap+0x1f1/0x2b0 [ 36.693417] __vm_munmap+0x138/0x3a0 [ 36.693894] __x64_sys_munmap+0x59/0x80 [ 36.694390] do_syscall_64+0x3f/0x90 [ 36.694896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.695545] [ 36.695766] The buggy address belongs to the object at ffff888009ec3488 [ 36.695766] which belongs to the cache vm_area_struct of size 168 [ 36.697294] The buggy address is located 88 bytes inside of [ 36.697294] freed 168-byte region [ffff888009ec3488, ffff888009ec3530) [ 36.698725] [ 36.698954] The buggy address belongs to the physical page: [ 36.699624] page:00000000f089607e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9ec3 [ 36.700764] memcg:ffff88800ee16f01 [ 36.701195] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.701861] page_type: 0xffffffff() [ 36.702310] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 36.703265] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee16f01 [ 36.704182] page dumped because: kasan: bad access detected [ 36.704899] [ 36.705116] Memory state around the buggy address: [ 36.705700] ffff888009ec3380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.706564] ffff888009ec3400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 36.707442] >ffff888009ec3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.708334] ^ [ 36.709131] ffff888009ec3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 36.709999] ffff888009ec3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.710890] ================================================================== [ 36.711951] Disabling lock debugging due to kernel taint [ 38.816923] BUG: Bad rss-counter state mm:00000000993960ee type:MM_FILEPAGES val:33 [ 38.817918] BUG: Bad rss-counter state mm:00000000993960ee type:MM_ANONPAGES val:22 [ 39.343218] BUG: Bad rss-counter state mm:000000005733ae52 type:MM_FILEPAGES val:33 [ 39.344401] BUG: Bad rss-counter state mm:000000005733ae52 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17004' (ECDSA) to the list of known hosts. 2023/06/20 03:40:21 fuzzer started 2023/06/20 03:40:21 dialing manager at localhost:44161 2023/06/20 03:40:21 checking machine... 2023/06/20 03:40:21 checking revisions... [ 39.987912] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:40:21 testing simple program... [ 40.034161] cgroup: Unknown subsys name 'net' [ 40.080418] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:40:15 Registers: info registers vcpu 0 RAX=ffff8880159e2221 RBX=000000000000006c RCX=000000000000000e RDX=1ffff11001b34f8c RSI=ffffffff818d5153 RDI=ffff88800d9a7c60 RBP=ffff88800d9a7c58 RSP=ffff88800d9a7930 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=0000000000000001 R12=0000000000000040 R13=ffff88800c141318 R14=ffff88800d9a7c80 R15=ffff88800d9a7c58 RIP=ffffffff818d51a0 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 00007f12f6895900 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=00007f12f5db5000 CR3=000000000d3e6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=013ef766647d1a4900000000000ae988 XMM05=93657bbd83ec53f80000000000134d08 XMM06=806171799158d9670000000000133788 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001bd5165 RBX=ffff88800dea8b18 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800dea8b28 RBP=ffff88800caf2a00 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800caf2500 R14=ffffffff8186b9c5 R15=ffff88800f16f780 RIP=ffffffff81846343 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa1ba13a900 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=00007ffd76f5b000 CR3=00000000158d8000 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=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