syzkaller login: [ 35.570863] BUG: Bad rss-counter state mm:000000006a01a5bd type:MM_FILEPAGES val:33 [ 35.571536] BUG: Bad rss-counter state mm:000000006a01a5bd type:MM_ANONPAGES val:22 [ 35.743985] ================================================================== [ 35.744594] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.746178] Read of size 8 at addr ffff88800c9ab4e0 by task sshd/222 [ 35.746707] [ 35.747391] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.750177] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.754190] Call Trace: [ 35.755178] [ 35.756197] dump_stack_lvl+0x91/0xf0 [ 35.757768] print_report+0xcc/0x620 [ 35.758958] ? __virt_addr_valid+0x102/0x340 [ 35.760653] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.762129] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.763775] kasan_report+0xbe/0xf0 [ 35.764957] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.766329] vma_interval_tree_remove+0xc75/0xec0 [ 35.767673] vma_prepare+0xc54/0x11a0 [ 35.768736] __split_vma+0x5af/0x950 [ 35.769677] ? __pfx___split_vma+0x10/0x10 [ 35.770782] ? find_held_lock+0x2c/0x110 [ 35.771941] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.773202] ? lock_is_held_type+0x9f/0x120 [ 35.774485] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.775881] ? mtree_range_walk+0x632/0x900 [ 35.777147] ? mas_walk+0x5c7/0x7c0 [ 35.778247] do_vmi_munmap+0x1f1/0x2b0 [ 35.779332] mmap_region+0x1f9/0x2660 [ 35.780419] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.781601] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.783346] ? __pfx_lock_acquire+0x10/0x10 [ 35.784580] ? __pfx_mmap_region+0x10/0x10 [ 35.785807] ? security_mmap_addr+0x7d/0xa0 [ 35.787045] ? get_unmapped_area+0x1f5/0x3f0 [ 35.788312] do_mmap+0x854/0xf00 [ 35.789265] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.790416] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.791616] ksys_mmap_pgoff+0x3af/0x500 [ 35.792758] do_syscall_64+0x3f/0x90 [ 35.793758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.795287] RIP: 0033:0x7f72136dfd82 [ 35.796379] 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 [ 35.801622] RSP: 002b:00007fff09581af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.803812] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72136dfd82 [ 35.805896] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7212b19000 [ 35.807845] RBP: 00007f7212b19000 R08: 0000000000000009 R09: 0000000000001000 [ 35.809897] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571a48e0ec0 [ 35.811849] R13: 00007fff09581b10 R14: 00007fff09581b40 R15: 00007fff09581ea0 [ 35.813940] [ 35.814599] [ 35.815064] Allocated by task 213: [ 35.816055] kasan_save_stack+0x22/0x50 [ 35.817195] kasan_set_track+0x25/0x30 [ 35.818357] __kasan_slab_alloc+0x59/0x70 [ 35.819516] kmem_cache_alloc+0x16b/0x370 [ 35.820687] vm_area_dup+0x20/0x160 [ 35.821757] __split_vma+0x170/0x950 [ 35.822842] split_vma+0xc6/0x110 [ 35.823834] mprotect_fixup+0x8d2/0xb30 [ 35.824967] do_mprotect_pkey+0x87e/0xd40 [ 35.826098] __x64_sys_mprotect+0x78/0xc0 [ 35.827329] do_syscall_64+0x3f/0x90 [ 35.828359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.829806] [ 35.830274] Freed by task 19: [ 35.831158] kasan_save_stack+0x22/0x50 [ 35.832309] kasan_set_track+0x25/0x30 [ 35.833416] kasan_save_free_info+0x2b/0x50 [ 35.834705] __kasan_slab_free+0x10a/0x190 [ 35.835921] kmem_cache_free+0x10d/0x4d0 [ 35.837072] rcu_core+0x8c8/0x2860 [ 35.838100] __do_softirq+0x1b7/0x7d4 [ 35.839184] [ 35.839635] Last potentially related work creation: [ 35.841030] kasan_save_stack+0x22/0x50 [ 35.842222] __kasan_record_aux_stack+0x8e/0xa0 [ 35.843485] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.844961] remove_vma+0x139/0x170 [ 35.845998] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.847292] do_vmi_munmap+0x1f1/0x2b0 [ 35.848365] __vm_munmap+0x138/0x3a0 [ 35.849413] __x64_sys_munmap+0x59/0x80 [ 35.850569] do_syscall_64+0x3f/0x90 [ 35.851664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.853134] [ 35.853601] Second to last potentially related work creation: [ 35.855264] kasan_save_stack+0x22/0x50 [ 35.856378] __kasan_record_aux_stack+0x8e/0xa0 [ 35.857710] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.859251] remove_vma+0x139/0x170 [ 35.860312] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.861615] do_vmi_munmap+0x1f1/0x2b0 [ 35.862761] mmap_region+0x1f9/0x2660 [ 35.863885] do_mmap+0x854/0xf00 [ 35.864882] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.866052] ksys_mmap_pgoff+0x3af/0x500 [ 35.867202] do_syscall_64+0x3f/0x90 [ 35.868277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.869793] [ 35.870285] The buggy address belongs to the object at ffff88800c9ab488 [ 35.870285] which belongs to the cache vm_area_struct of size 168 [ 35.873961] The buggy address is located 88 bytes inside of [ 35.873961] freed 168-byte region [ffff88800c9ab488, ffff88800c9ab530) [ 35.877439] [ 35.877938] The buggy address belongs to the physical page: [ 35.879514] page:0000000001e560ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9ab [ 35.882166] memcg:ffff88800d71e901 [ 35.883248] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.884812] page_type: 0xffffffff() [ 35.885862] raw: 0100000000000200 ffff88800879fc80 ffffea0000366240 dead000000000004 [ 35.888073] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d71e901 [ 35.890293] page dumped because: kasan: bad access detected [ 35.891912] [ 35.892367] Memory state around the buggy address: [ 35.893765] ffff88800c9ab380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.895809] ffff88800c9ab400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.897897] >ffff88800c9ab480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.900003] ^ [ 35.901845] ffff88800c9ab500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 35.903924] ffff88800c9ab580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.906004] ================================================================== [ 35.908562] Disabling lock debugging due to kernel taint [ 38.614999] BUG: Bad rss-counter state mm:00000000dac6b42d type:MM_FILEPAGES val:33 [ 38.615632] BUG: Bad rss-counter state mm:00000000dac6b42d type:MM_ANONPAGES val:22 [ 39.337855] BUG: Bad rss-counter state mm:0000000045010e01 type:MM_FILEPAGES val:33 [ 39.338565] BUG: Bad rss-counter state mm:0000000045010e01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19919' (ECDSA) to the list of known hosts. 2023/06/20 08:02:45 fuzzer started 2023/06/20 08:02:46 dialing manager at localhost:44161 2023/06/20 08:02:46 checking machine... 2023/06/20 08:02:46 checking revisions... [ 40.254243] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:02:46 testing simple program... [ 40.296454] cgroup: Unknown subsys name 'net' [ 40.361245] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:02:45 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=0000000000000001 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=00007fd1d2db3328 CR3=0000000005482000 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=0000000000000001 RBX=1ffff110028b7eee RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff856c1d40 RBP=0000000000000001 RSP=ffff8880145bf760 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856c1d40 R15=0000000000000000 RIP=ffffffff812d8eb2 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 00007fbc89a4a900 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=00007ffd4bfe6388 CR3=000000001a1fe000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000