syzkaller login: [ 31.378159] BUG: Bad rss-counter state mm:0000000030322fc3 type:MM_FILEPAGES val:33 [ 31.379820] BUG: Bad rss-counter state mm:0000000030322fc3 type:MM_ANONPAGES val:22 [ 31.517995] ================================================================== [ 31.518977] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.519997] Read of size 8 at addr ffff88800efd5968 by task sshd/219 [ 31.520984] [ 31.521220] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.522150] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.523214] Call Trace: [ 31.523568] [ 31.523875] dump_stack_lvl+0x91/0xf0 [ 31.524411] print_report+0xcc/0x620 [ 31.524944] ? __virt_addr_valid+0x102/0x340 [ 31.525535] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.526203] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.526870] kasan_report+0xbe/0xf0 [ 31.527422] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.528089] vma_interval_tree_remove+0xc75/0xec0 [ 31.528731] vma_prepare+0xc54/0x11a0 [ 31.529237] __split_vma+0x5af/0x950 [ 31.529738] ? __pfx___split_vma+0x10/0x10 [ 31.530295] ? find_held_lock+0x2c/0x110 [ 31.530843] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.531450] ? lock_is_held_type+0x9f/0x120 [ 31.532015] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.532658] ? mtree_range_walk+0x632/0x900 [ 31.533250] ? mas_walk+0x5c7/0x7c0 [ 31.533752] do_vmi_munmap+0x1f1/0x2b0 [ 31.534272] mmap_region+0x1f9/0x2660 [ 31.534787] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.535328] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.536107] ? __pfx_lock_acquire+0x10/0x10 [ 31.536671] ? __pfx_mmap_region+0x10/0x10 [ 31.537238] ? security_mmap_addr+0x7d/0xa0 [ 31.537808] ? get_unmapped_area+0x1f5/0x3f0 [ 31.538394] do_mmap+0x854/0xf00 [ 31.538863] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.539398] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.540005] ksys_mmap_pgoff+0x3af/0x500 [ 31.540545] do_syscall_64+0x3f/0x90 [ 31.541053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.541738] RIP: 0033:0x7fa6e6912d82 [ 31.542221] 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 [ 31.544494] RSP: 002b:00007ffec44d9ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.545460] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa6e6912d82 [ 31.546374] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6e5d4c000 [ 31.547277] RBP: 00007fa6e5d4c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.548193] R10: 0000000000000812 R11: 0000000000000206 R12: 00005608633f1ec0 [ 31.549086] R13: 00007ffec44da010 R14: 00007ffec44da040 R15: 00007ffec44da3a0 [ 31.550002] [ 31.550317] [ 31.550544] Allocated by task 212: [ 31.551003] kasan_save_stack+0x22/0x50 [ 31.551545] kasan_set_track+0x25/0x30 [ 31.552071] __kasan_slab_alloc+0x59/0x70 [ 31.552628] kmem_cache_alloc+0x16b/0x370 [ 31.553181] vm_area_dup+0x20/0x160 [ 31.553669] __split_vma+0x170/0x950 [ 31.554169] split_vma+0xc6/0x110 [ 31.554639] mprotect_fixup+0x8d2/0xb30 [ 31.555174] do_mprotect_pkey+0x87e/0xd40 [ 31.555752] __x64_sys_mprotect+0x78/0xc0 [ 31.556311] do_syscall_64+0x3f/0x90 [ 31.556818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.557506] [ 31.557737] Freed by task 212: [ 31.558156] kasan_save_stack+0x22/0x50 [ 31.558691] kasan_set_track+0x25/0x30 [ 31.559222] kasan_save_free_info+0x2b/0x50 [ 31.559800] __kasan_slab_free+0x10a/0x190 [ 31.560366] kmem_cache_free+0x10d/0x4d0 [ 31.560912] rcu_core+0x8c8/0x2860 [ 31.561386] __do_softirq+0x1b7/0x7d4 [ 31.561899] [ 31.562186] Last potentially related work creation: [ 31.562816] kasan_save_stack+0x22/0x50 [ 31.563382] __kasan_record_aux_stack+0x8e/0xa0 [ 31.564016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.564711] remove_vma+0x139/0x170 [ 31.565202] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.565804] do_vmi_munmap+0x1f1/0x2b0 [ 31.566324] __vm_munmap+0x138/0x3a0 [ 31.566823] __x64_sys_munmap+0x59/0x80 [ 31.567361] do_syscall_64+0x3f/0x90 [ 31.567871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.568560] [ 31.568792] Second to last potentially related work creation: [ 31.569530] kasan_save_stack+0x22/0x50 [ 31.570073] __kasan_record_aux_stack+0x8e/0xa0 [ 31.570686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.571387] remove_vma+0x139/0x170 [ 31.571872] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.572466] do_vmi_munmap+0x1f1/0x2b0 [ 31.572982] mmap_region+0x1f9/0x2660 [ 31.573494] do_mmap+0x854/0xf00 [ 31.573958] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.574477] ksys_mmap_pgoff+0x3af/0x500 [ 31.575015] do_syscall_64+0x3f/0x90 [ 31.575526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.576207] [ 31.576437] The buggy address belongs to the object at ffff88800efd5910 [ 31.576437] which belongs to the cache vm_area_struct of size 168 [ 31.578017] The buggy address is located 88 bytes inside of [ 31.578017] freed 168-byte region [ffff88800efd5910, ffff88800efd59b8) [ 31.579522] [ 31.579759] The buggy address belongs to the physical page: [ 31.580467] page:000000002d2f1acd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefd5 [ 31.581624] memcg:ffff88800d0f2301 [ 31.582081] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.582824] page_type: 0xffffffff() [ 31.583303] raw: 0100000000000200 ffff88800879fc80 ffffea000039b640 dead00000000000d [ 31.584309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0f2301 [ 31.585292] page dumped because: kasan: bad access detected [ 31.586006] [ 31.586236] Memory state around the buggy address: [ 31.586860] ffff88800efd5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.587817] ffff88800efd5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.588773] >ffff88800efd5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.589732] ^ [ 31.590619] ffff88800efd5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.591610] ffff88800efd5a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.592583] ================================================================== [ 31.593659] Disabling lock debugging due to kernel taint [ 33.617751] BUG: Bad rss-counter state mm:0000000002b237e5 type:MM_FILEPAGES val:33 [ 33.619071] BUG: Bad rss-counter state mm:0000000002b237e5 type:MM_ANONPAGES val:22 [ 34.058727] BUG: Bad rss-counter state mm:00000000ce001c86 type:MM_FILEPAGES val:33 [ 34.059758] BUG: Bad rss-counter state mm:00000000ce001c86 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34131' (ECDSA) to the list of known hosts. 2023/06/19 15:19:32 fuzzer started 2023/06/19 15:19:32 dialing manager at localhost:44161 2023/06/19 15:19:32 checking machine... 2023/06/19 15:19:32 checking revisions... [ 34.678361] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:19:32 testing simple program... [ 34.722649] cgroup: Unknown subsys name 'net' [ 34.759452] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:19:29 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff83ab4207 RDI=ffffffff87f9468c RBP=0000000000000000 RSP=ffff8880167bf500 R8 =0000000000000000 R9 =fffffbfff0ff29c8 R10=ffffffff87f94e43 R11=000009d7000009d7 R12=0000000000000000 R13=00000000000000be R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c07f1 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 00007fc18fdf6900 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=00007ffd3df63000 CR3=000000001c9dc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fe2cc472670 CR3=000000000c7c2000 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=2032333a39313a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a39313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000