syzkaller login: [ 38.664672] BUG: Bad rss-counter state mm:00000000740f7880 type:MM_FILEPAGES val:33 [ 38.665462] BUG: Bad rss-counter state mm:00000000740f7880 type:MM_ANONPAGES val:22 [ 38.794609] ================================================================== [ 38.795304] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.795939] Read of size 8 at addr ffff88800d8b14e0 by task sshd/219 [ 38.796444] [ 38.796586] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.797179] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.797876] Call Trace: [ 38.798100] [ 38.798295] dump_stack_lvl+0x91/0xf0 [ 38.798650] print_report+0xcc/0x620 [ 38.799251] ? __virt_addr_valid+0x102/0x340 [ 38.799648] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.800107] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.800539] kasan_report+0xbe/0xf0 [ 38.800886] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.801362] vma_interval_tree_remove+0xc75/0xec0 [ 38.801796] vma_prepare+0xc54/0x11a0 [ 38.802164] __split_vma+0x5af/0x950 [ 38.802487] ? __pfx___split_vma+0x10/0x10 [ 38.802892] ? find_held_lock+0x2c/0x110 [ 38.803300] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.803737] ? lock_is_held_type+0x9f/0x120 [ 38.804126] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.804567] ? mtree_range_walk+0x632/0x900 [ 38.804976] ? mas_walk+0x5c7/0x7c0 [ 38.805315] do_vmi_munmap+0x1f1/0x2b0 [ 38.805672] mmap_region+0x1f9/0x2660 [ 38.806023] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.806393] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.806949] ? __pfx_lock_acquire+0x10/0x10 [ 38.807352] ? __pfx_mmap_region+0x10/0x10 [ 38.807729] ? security_mmap_addr+0x7d/0xa0 [ 38.808104] ? get_unmapped_area+0x1f5/0x3f0 [ 38.808493] do_mmap+0x854/0xf00 [ 38.808796] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.809144] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.809540] ksys_mmap_pgoff+0x3af/0x500 [ 38.809898] do_syscall_64+0x3f/0x90 [ 38.810239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.810710] RIP: 0033:0x7f8db0e6fd82 [ 38.811068] 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 [ 38.812570] RSP: 002b:00007ffc69798198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.813249] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8db0e6fd82 [ 38.813853] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8db02a9000 [ 38.814452] RBP: 00007f8db02a9000 R08: 0000000000000009 R09: 0000000000001000 [ 38.815091] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c93528cec0 [ 38.815687] R13: 00007ffc697981b0 R14: 00007ffc697981e0 R15: 00007ffc69798540 [ 38.816298] [ 38.816511] [ 38.816663] Allocated by task 212: [ 38.816969] kasan_save_stack+0x22/0x50 [ 38.817351] kasan_set_track+0x25/0x30 [ 38.817709] __kasan_slab_alloc+0x59/0x70 [ 38.818070] kmem_cache_alloc+0x16b/0x370 [ 38.818424] vm_area_dup+0x20/0x160 [ 38.818740] __split_vma+0x170/0x950 [ 38.819165] split_vma+0xc6/0x110 [ 38.819541] mprotect_fixup+0x8d2/0xb30 [ 38.819918] do_mprotect_pkey+0x87e/0xd40 [ 38.820288] __x64_sys_mprotect+0x78/0xc0 [ 38.820652] do_syscall_64+0x3f/0x90 [ 38.820986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.821476] [ 38.821627] Freed by task 13: [ 38.821891] kasan_save_stack+0x22/0x50 [ 38.822245] kasan_set_track+0x25/0x30 [ 38.822589] kasan_save_free_info+0x2b/0x50 [ 38.823032] __kasan_slab_free+0x10a/0x190 [ 38.823409] kmem_cache_free+0x10d/0x4d0 [ 38.823758] rcu_core+0x8c8/0x2860 [ 38.824090] __do_softirq+0x1b7/0x7d4 [ 38.824434] [ 38.824584] Last potentially related work creation: [ 38.824989] kasan_save_stack+0x22/0x50 [ 38.825339] __kasan_record_aux_stack+0x8e/0xa0 [ 38.825733] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.826178] remove_vma+0x139/0x170 [ 38.826495] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.826887] do_vmi_munmap+0x1f1/0x2b0 [ 38.827269] __vm_munmap+0x138/0x3a0 [ 38.827600] __x64_sys_munmap+0x59/0x80 [ 38.827946] do_syscall_64+0x3f/0x90 [ 38.828280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.828729] [ 38.828884] Second to last potentially related work creation: [ 38.829362] kasan_save_stack+0x22/0x50 [ 38.829723] __kasan_record_aux_stack+0x8e/0xa0 [ 38.830125] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.830577] remove_vma+0x139/0x170 [ 38.830942] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.831349] do_vmi_munmap+0x1f1/0x2b0 [ 38.831692] mmap_region+0x1f9/0x2660 [ 38.832056] do_mmap+0x854/0xf00 [ 38.832373] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.832717] ksys_mmap_pgoff+0x3af/0x500 [ 38.833069] do_syscall_64+0x3f/0x90 [ 38.833399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.833845] [ 38.833999] The buggy address belongs to the object at ffff88800d8b1488 [ 38.833999] which belongs to the cache vm_area_struct of size 168 [ 38.835095] The buggy address is located 88 bytes inside of [ 38.835095] freed 168-byte region [ffff88800d8b1488, ffff88800d8b1530) [ 38.836088] [ 38.836239] The buggy address belongs to the physical page: [ 38.836688] page:00000000ce54a142 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8b1 [ 38.837454] memcg:ffff88800c5cea01 [ 38.837759] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.838249] page_type: 0xffffffff() [ 38.838576] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.839255] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5cea01 [ 38.839876] page dumped because: kasan: bad access detected [ 38.840344] [ 38.840499] Memory state around the buggy address: [ 38.840887] ffff88800d8b1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.841505] ffff88800d8b1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.842152] >ffff88800d8b1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.842723] ^ [ 38.843291] ffff88800d8b1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.843848] ffff88800d8b1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.844405] ================================================================== [ 38.845148] Disabling lock debugging due to kernel taint [ 40.552663] BUG: Bad rss-counter state mm:000000004253a800 type:MM_FILEPAGES val:33 [ 40.553392] BUG: Bad rss-counter state mm:000000004253a800 type:MM_ANONPAGES val:22 [ 40.911014] BUG: Bad rss-counter state mm:00000000104aa233 type:MM_FILEPAGES val:33 [ 40.911704] BUG: Bad rss-counter state mm:00000000104aa233 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41521' (ECDSA) to the list of known hosts. 2023/06/21 09:43:20 fuzzer started 2023/06/21 09:43:21 dialing manager at localhost:36067 2023/06/21 09:43:21 checking machine... 2023/06/21 09:43:21 checking revisions... [ 41.471095] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:43:21 testing simple program... [ 41.515354] cgroup: Unknown subsys name 'net' [ 41.552357] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:43:20 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce3a2c0 RCX=ffffffff81377b2d RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88806ce3a2d8 RSP=ffff88806ce09e68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffffffff85616740 R13=0000000000000000 R14=0000000000000200 R15=0000000000000009 RIP=ffffffff81378c52 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 00007f7f507b5900 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=00007f7f50784008 CR3=000000000e482000 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=00000000000000000000000000000000 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f5dcb06b010 CR3=000000000f0fe000 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=2030323a33343a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a33343a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000