syzkaller login: [ 31.277119] BUG: Bad rss-counter state mm:00000000e4267306 type:MM_FILEPAGES val:33 [ 31.278587] BUG: Bad rss-counter state mm:00000000e4267306 type:MM_ANONPAGES val:22 [ 31.411951] ================================================================== [ 31.413061] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.414008] Read of size 8 at addr ffff888016cb0968 by task sshd/220 [ 31.414886] [ 31.415101] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.415961] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.416972] Call Trace: [ 31.417287] <TASK> [ 31.417571] dump_stack_lvl+0x91/0xf0 [ 31.418066] print_report+0xcc/0x620 [ 31.418546] ? __virt_addr_valid+0x102/0x340 [ 31.419100] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.419705] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.420308] kasan_report+0xbe/0xf0 [ 31.420812] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.421423] vma_interval_tree_remove+0xc75/0xec0 [ 31.422013] vma_prepare+0xc54/0x11a0 [ 31.422485] __split_vma+0x5af/0x950 [ 31.422946] ? __pfx___split_vma+0x10/0x10 [ 31.423471] ? find_held_lock+0x2c/0x110 [ 31.423982] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.424536] ? lock_is_held_type+0x9f/0x120 [ 31.425074] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.425678] ? mtree_range_walk+0x632/0x900 [ 31.426216] ? mas_walk+0x5c7/0x7c0 [ 31.426684] do_vmi_munmap+0x1f1/0x2b0 [ 31.427169] mmap_region+0x1f9/0x2660 [ 31.427652] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.428156] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.428868] ? __pfx_lock_acquire+0x10/0x10 [ 31.429401] ? __pfx_mmap_region+0x10/0x10 [ 31.429923] ? security_mmap_addr+0x7d/0xa0 [ 31.430446] ? get_unmapped_area+0x1f5/0x3f0 [ 31.430990] do_mmap+0x854/0xf00 [ 31.431425] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.431914] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.432466] ksys_mmap_pgoff+0x3af/0x500 [ 31.432985] do_syscall_64+0x3f/0x90 [ 31.433456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.434088] RIP: 0033:0x7f2b33840d82 [ 31.434541] 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 [ 31.436633] RSP: 002b:00007ffd4c1f4528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.437518] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b33840d82 [ 31.438349] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b32c7a000 [ 31.439180] RBP: 00007f2b32c7a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.440009] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f83f04cec0 [ 31.440865] R13: 00007ffd4c1f4540 R14: 00007ffd4c1f4570 R15: 00007ffd4c1f48d0 [ 31.441712] </TASK> [ 31.441998] [ 31.442210] Allocated by task 213: [ 31.442643] kasan_save_stack+0x22/0x50 [ 31.443141] kasan_set_track+0x25/0x30 [ 31.443627] __kasan_slab_alloc+0x59/0x70 [ 31.444145] kmem_cache_alloc+0x16b/0x370 [ 31.444664] vm_area_dup+0x20/0x160 [ 31.445116] __split_vma+0x170/0x950 [ 31.445580] split_vma+0xc6/0x110 [ 31.446013] mprotect_fixup+0x8d2/0xb30 [ 31.446511] do_mprotect_pkey+0x87e/0xd40 [ 31.447021] __x64_sys_mprotect+0x78/0xc0 [ 31.447532] do_syscall_64+0x3f/0x90 [ 31.447997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.448647] [ 31.448860] Freed by task 213: [ 31.449250] kasan_save_stack+0x22/0x50 [ 31.449748] kasan_set_track+0x25/0x30 [ 31.450241] kasan_save_free_info+0x2b/0x50 [ 31.450760] __kasan_slab_free+0x10a/0x190 [ 31.451288] kmem_cache_free+0x10d/0x4d0 [ 31.451791] rcu_core+0x8c8/0x2860 [ 31.452236] __do_softirq+0x1b7/0x7d4 [ 31.452712] [ 31.452926] Last potentially related work creation: [ 31.453501] kasan_save_stack+0x22/0x50 [ 31.453998] __kasan_record_aux_stack+0x8e/0xa0 [ 31.454563] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.455200] remove_vma+0x139/0x170 [ 31.455645] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.456191] do_vmi_munmap+0x1f1/0x2b0 [ 31.456685] __vm_munmap+0x138/0x3a0 [ 31.457150] __x64_sys_munmap+0x59/0x80 [ 31.457641] do_syscall_64+0x3f/0x90 [ 31.458112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.458749] [ 31.458960] The buggy address belongs to the object at ffff888016cb0910 [ 31.458960] which belongs to the cache vm_area_struct of size 168 [ 31.460415] The buggy address is located 88 bytes inside of [ 31.460415] freed 168-byte region [ffff888016cb0910, ffff888016cb09b8) [ 31.461813] [ 31.462025] The buggy address belongs to the physical page: [ 31.462675] page:000000001fd5ca08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cb0 [ 31.463752] memcg:ffff88800fb15301 [ 31.464178] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.464839] page_type: 0xffffffff() [ 31.465287] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.466198] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb15301 [ 31.467096] page dumped because: kasan: bad access detected [ 31.467756] [ 31.467967] Memory state around the buggy address: [ 31.468546] ffff888016cb0800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.469404] ffff888016cb0880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.470248] >ffff888016cb0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.471086] ^ [ 31.471845] ffff888016cb0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.472694] ffff888016cb0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.473528] ================================================================== [ 31.474564] Disabling lock debugging due to kernel taint [ 33.938200] BUG: Bad rss-counter state mm:00000000c2d5167d type:MM_FILEPAGES val:33 [ 33.939445] BUG: Bad rss-counter state mm:00000000c2d5167d type:MM_ANONPAGES val:22 [ 34.326279] BUG: Bad rss-counter state mm:000000007473989c type:MM_FILEPAGES val:33 [ 34.327465] BUG: Bad rss-counter state mm:000000007473989c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22604' (ECDSA) to the list of known hosts. 2023/06/19 14:31:57 fuzzer started 2023/06/19 14:31:58 dialing manager at localhost:44161 2023/06/19 14:31:58 checking machine... 2023/06/19 14:31:58 checking revisions... [ 35.132785] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:31:58 testing simple program... [ 35.184182] cgroup: Unknown subsys name 'net' [ 35.236565] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:31:57 Registers: info registers vcpu 0 RAX=ffff888014388001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014387f01 RSI=ffff888014387f48 RDI=ffff8880143876e0 RBP=ffff888014387728 RSP=ffff888014387648 R8 =0000000000000001 R9 =ffff888014387710 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888014387730 R13=ffff888014380000 R14=ffff888014387f48 R15=ffff8880143876d0 RIP=ffffffff811304d1 RFL=00000296 [--S-AP-] 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 00007f92e6eb8900 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=00007fd1d0be9650 CR3=000000000c794000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=227b254a9a63ff8e00000000000ae988 XMM05=02b677421a49b9d50000000000136448 XMM06=4fda316b135da52b0000000000135238 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=ffff888008c58400 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=00007ffdbeb6e608 CR3=000000000e826000 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=2037353a31333a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a31333a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000