syzkaller login: [ 42.278468] BUG: Bad rss-counter state mm:00000000fac59e58 type:MM_FILEPAGES val:33 [ 42.279710] BUG: Bad rss-counter state mm:00000000fac59e58 type:MM_ANONPAGES val:22 [ 42.438612] ================================================================== [ 42.439520] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.440470] Read of size 8 at addr ffff88800ea7f798 by task sshd/219 [ 42.441388] [ 42.441649] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.442557] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.443584] Call Trace: [ 42.443915] [ 42.444205] dump_stack_lvl+0x91/0xf0 [ 42.444704] print_report+0xcc/0x620 [ 42.445204] ? __virt_addr_valid+0x102/0x340 [ 42.445771] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.446419] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.447051] kasan_report+0xbe/0xf0 [ 42.447546] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.448193] vma_interval_tree_remove+0xc75/0xec0 [ 42.448799] vma_prepare+0xc54/0x11a0 [ 42.449288] __split_vma+0x5af/0x950 [ 42.449773] ? __pfx___split_vma+0x10/0x10 [ 42.450331] ? find_held_lock+0x2c/0x110 [ 42.450854] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.451428] ? lock_is_held_type+0x9f/0x120 [ 42.451969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.452576] ? mtree_range_walk+0x632/0x900 [ 42.453134] ? mas_walk+0x5c7/0x7c0 [ 42.453612] do_vmi_munmap+0x1f1/0x2b0 [ 42.454125] mmap_region+0x1f9/0x2660 [ 42.454616] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.455134] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.455861] ? __pfx_lock_acquire+0x10/0x10 [ 42.456402] ? __pfx_mmap_region+0x10/0x10 [ 42.456932] ? security_mmap_addr+0x7d/0xa0 [ 42.457470] ? get_unmapped_area+0x1f5/0x3f0 [ 42.458036] do_mmap+0x854/0xf00 [ 42.458483] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.458985] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.459557] ksys_mmap_pgoff+0x3af/0x500 [ 42.460066] do_syscall_64+0x3f/0x90 [ 42.460547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.461200] RIP: 0033:0x7f1de7186d82 [ 42.461659] 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 [ 42.463843] RSP: 002b:00007ffc53f92ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.464761] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1de7186d82 [ 42.465613] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1de65c0000 [ 42.466484] RBP: 00007f1de65c0000 R08: 0000000000000009 R09: 0000000000001000 [ 42.467341] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565061fdaec0 [ 42.468197] R13: 00007ffc53f92d00 R14: 00007ffc53f92d30 R15: 00007ffc53f93090 [ 42.469049] [ 42.469352] [ 42.469575] Allocated by task 212: [ 42.470021] kasan_save_stack+0x22/0x50 [ 42.470535] kasan_set_track+0x25/0x30 [ 42.471031] __kasan_slab_alloc+0x59/0x70 [ 42.471560] kmem_cache_alloc+0x16b/0x370 [ 42.472082] vm_area_dup+0x20/0x160 [ 42.472541] __split_vma+0x170/0x950 [ 42.473018] split_vma+0xc6/0x110 [ 42.473466] mprotect_fixup+0x8d2/0xb30 [ 42.473985] do_mprotect_pkey+0x87e/0xd40 [ 42.474511] __x64_sys_mprotect+0x78/0xc0 [ 42.475035] do_syscall_64+0x3f/0x90 [ 42.475522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.476169] [ 42.476389] Freed by task 212: [ 42.476795] kasan_save_stack+0x22/0x50 [ 42.477305] kasan_set_track+0x25/0x30 [ 42.477804] kasan_save_free_info+0x2b/0x50 [ 42.478354] __kasan_slab_free+0x10a/0x190 [ 42.478886] kmem_cache_free+0x10d/0x4d0 [ 42.479399] rcu_core+0x8c8/0x2860 [ 42.479849] __do_softirq+0x1b7/0x7d4 [ 42.480332] [ 42.480551] Last potentially related work creation: [ 42.481134] kasan_save_stack+0x22/0x50 [ 42.481643] __kasan_record_aux_stack+0x8e/0xa0 [ 42.482242] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.482986] remove_vma+0x139/0x170 [ 42.483440] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.483995] do_vmi_munmap+0x1f1/0x2b0 [ 42.484490] __vm_munmap+0x138/0x3a0 [ 42.484966] __x64_sys_munmap+0x59/0x80 [ 42.485470] do_syscall_64+0x3f/0x90 [ 42.485958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.486612] [ 42.486833] The buggy address belongs to the object at ffff88800ea7f740 [ 42.486833] which belongs to the cache vm_area_struct of size 168 [ 42.488312] The buggy address is located 88 bytes inside of [ 42.488312] freed 168-byte region [ffff88800ea7f740, ffff88800ea7f7e8) [ 42.489737] [ 42.489979] The buggy address belongs to the physical page: [ 42.490643] page:0000000034e84d3f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea7f [ 42.491737] memcg:ffff88800ec48901 [ 42.492170] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.492817] page_type: 0xffffffff() [ 42.493265] raw: 0100000000000200 ffff88800879fc80 ffffea000059c700 dead000000000008 [ 42.494188] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec48901 [ 42.495100] page dumped because: kasan: bad access detected [ 42.495771] [ 42.495988] Memory state around the buggy address: [ 42.496573] ffff88800ea7f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.497445] ffff88800ea7f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 42.498316] >ffff88800ea7f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 42.499173] ^ [ 42.499674] ffff88800ea7f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 42.500547] ffff88800ea7f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 42.501413] ================================================================== [ 42.502413] Disabling lock debugging due to kernel taint [ 44.379017] BUG: Bad rss-counter state mm:00000000f959d7b9 type:MM_FILEPAGES val:33 [ 44.380040] BUG: Bad rss-counter state mm:00000000f959d7b9 type:MM_ANONPAGES val:22 [ 44.870605] BUG: Bad rss-counter state mm:00000000c10702ad type:MM_FILEPAGES val:33 [ 44.871984] BUG: Bad rss-counter state mm:00000000c10702ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22492' (ECDSA) to the list of known hosts. 2023/06/19 18:28:01 fuzzer started 2023/06/19 18:28:01 dialing manager at localhost:44161 2023/06/19 18:28:01 checking machine... 2023/06/19 18:28:01 checking revisions... [ 45.628145] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:28:01 testing simple program... [ 45.677931] cgroup: Unknown subsys name 'net' [ 45.744088] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:27:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f735c737ac0 CR3=000000000e59e000 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=2031303a38323a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a38323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f5eb9e8a366 RCX=ffffffff813a0a8d RDX=ffff888016401b40 RSI=ffffffffffffffff RDI=00007f5eb9e8a366 RBP=ffffffffffffffff RSP=ffff8880165ef420 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f5eb9e8a000 R11=00000000000b6996 R12=ffff8880165ef560 R13=0000000000000000 R14=ffff888016401b40 R15=0000000000000cc0 RIP=ffffffff814c02f8 RFL=00000283 [--S---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 00007f5eb9997900 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=00007ffdc9c73000 CR3=0000000016672000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000