syzkaller login: [ 33.841912] BUG: Bad rss-counter state mm:00000000b2af21cc type:MM_FILEPAGES val:33 [ 33.843187] BUG: Bad rss-counter state mm:00000000b2af21cc type:MM_ANONPAGES val:22 [ 33.886204] ================================================================== [ 33.887267] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.888374] Read of size 8 at addr ffff88800f2b8b38 by task sshd/220 [ 33.889149] [ 33.889366] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.890247] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.891217] Call Trace: [ 33.891540] [ 33.891838] dump_stack_lvl+0x91/0xf0 [ 33.892330] print_report+0xcc/0x620 [ 33.892816] ? __virt_addr_valid+0x102/0x340 [ 33.893372] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.893994] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.894617] kasan_report+0xbe/0xf0 [ 33.895097] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.895745] vma_interval_tree_remove+0xc75/0xec0 [ 33.896352] vma_prepare+0xc54/0x11a0 [ 33.896833] __split_vma+0x5af/0x950 [ 33.897309] ? __pfx___split_vma+0x10/0x10 [ 33.897843] ? find_held_lock+0x2c/0x110 [ 33.898363] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.898929] ? lock_is_held_type+0x9f/0x120 [ 33.899468] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.900088] ? mtree_range_walk+0x632/0x900 [ 33.900639] ? mas_walk+0x5c7/0x7c0 [ 33.901119] do_vmi_munmap+0x1f1/0x2b0 [ 33.901614] mmap_region+0x1f9/0x2660 [ 33.902097] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.902612] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.903331] ? __pfx_lock_acquire+0x10/0x10 [ 33.903884] ? __pfx_mmap_region+0x10/0x10 [ 33.904421] ? security_mmap_addr+0x7d/0xa0 [ 33.904958] ? get_unmapped_area+0x1f5/0x3f0 [ 33.905518] do_mmap+0x854/0xf00 [ 33.905957] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.906457] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.907024] ksys_mmap_pgoff+0x3af/0x500 [ 33.907535] do_syscall_64+0x3f/0x90 [ 33.908024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.908679] RIP: 0033:0x7f2579c21d82 [ 33.909135] 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 [ 33.911301] RSP: 002b:00007ffd8dfe5c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.912231] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2579c21d82 [ 33.913093] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f257905b000 [ 33.913953] RBP: 00007f257905b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.914812] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dde8c5bec0 [ 33.915664] R13: 00007ffd8dfe5c60 R14: 00007ffd8dfe5c90 R15: 00007ffd8dfe5ff0 [ 33.916540] [ 33.916833] [ 33.917051] Allocated by task 213: [ 33.917487] kasan_save_stack+0x22/0x50 [ 33.917990] kasan_set_track+0x25/0x30 [ 33.918491] __kasan_slab_alloc+0x59/0x70 [ 33.919017] kmem_cache_alloc+0x16b/0x370 [ 33.919537] vm_area_dup+0x20/0x160 [ 33.920003] __split_vma+0x170/0x950 [ 33.920470] split_vma+0xc6/0x110 [ 33.920911] mprotect_fixup+0x8d2/0xb30 [ 33.921417] do_mprotect_pkey+0x87e/0xd40 [ 33.921942] __x64_sys_mprotect+0x78/0xc0 [ 33.922466] do_syscall_64+0x3f/0x90 [ 33.922943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.923591] [ 33.923824] Freed by task 213: [ 33.924227] kasan_save_stack+0x22/0x50 [ 33.924730] kasan_set_track+0x25/0x30 [ 33.925224] kasan_save_free_info+0x2b/0x50 [ 33.925761] __kasan_slab_free+0x10a/0x190 [ 33.926293] kmem_cache_free+0x10d/0x4d0 [ 33.926805] rcu_core+0x8c8/0x2860 [ 33.927252] __do_softirq+0x1b7/0x7d4 [ 33.927742] [ 33.927960] Last potentially related work creation: [ 33.928549] kasan_save_stack+0x22/0x50 [ 33.929057] __kasan_record_aux_stack+0x8e/0xa0 [ 33.929632] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.930279] remove_vma+0x139/0x170 [ 33.930732] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.931293] do_vmi_munmap+0x1f1/0x2b0 [ 33.931871] __vm_munmap+0x138/0x3a0 [ 33.932343] __x64_sys_munmap+0x59/0x80 [ 33.932840] do_syscall_64+0x3f/0x90 [ 33.933322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.933973] [ 33.934188] The buggy address belongs to the object at ffff88800f2b8ae0 [ 33.934188] which belongs to the cache vm_area_struct of size 168 [ 33.935683] The buggy address is located 88 bytes inside of [ 33.935683] freed 168-byte region [ffff88800f2b8ae0, ffff88800f2b8b88) [ 33.937099] [ 33.937316] The buggy address belongs to the physical page: [ 33.937978] page:000000003854c690 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2b8 [ 33.939077] memcg:ffff88801788ab01 [ 33.939506] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.940162] page_type: 0xffffffff() [ 33.940618] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.941538] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801788ab01 [ 33.942457] page dumped because: kasan: bad access detected [ 33.943124] [ 33.943342] Memory state around the buggy address: [ 33.943948] ffff88800f2b8a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.944813] ffff88800f2b8a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 33.945679] >ffff88800f2b8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.946535] ^ [ 33.947150] ffff88800f2b8b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.948031] ffff88800f2b8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.948889] ================================================================== [ 33.949879] Disabling lock debugging due to kernel taint [ 36.010238] BUG: Bad rss-counter state mm:000000000042cad2 type:MM_FILEPAGES val:33 [ 36.011281] BUG: Bad rss-counter state mm:000000000042cad2 type:MM_ANONPAGES val:22 [ 36.570766] BUG: Bad rss-counter state mm:0000000040d9d214 type:MM_FILEPAGES val:33 [ 36.572062] BUG: Bad rss-counter state mm:0000000040d9d214 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44209' (ECDSA) to the list of known hosts. 2023/06/19 21:13:58 fuzzer started 2023/06/19 21:13:58 dialing manager at localhost:44161 2023/06/19 21:13:58 checking machine... 2023/06/19 21:13:58 checking revisions... [ 37.350471] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:13:58 testing simple program... [ 37.401426] cgroup: Unknown subsys name 'net' [ 37.462671] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:13:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018ba2a50 RCX=ffffffff8198bc47 RDX=ffff88800e283680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880188f2468 RSP=ffff888017aafc70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=7962206d65687420 R12=0000000000000001 R13=0000000000000001 R14=ffff88800cace400 R15=0000000000000000 RIP=ffffffff814c07e0 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 00007f97a3664900 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=00007ffcd5fb3000 CR3=000000000e27c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 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=00007f230b1caf40 CR3=000000000c934000 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=4f94afcb383fbd92344cc55b62180de3 XMM02=000000000011dbc8ec2efd57dc4c00df XMM03=000000000012489809181bb876aa525f XMM04=2ec8369c2614d65b00000000000ae988 XMM05=3ca63e3374efff2d0000000000135280 XMM06=4fda316b135da52b0000000000134320 XMM07=e042d86d42eb936e0000000000124b18 XMM08=09181bb876aa525f000000000011dc28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000