syzkaller login: [ 32.018420] BUG: Bad rss-counter state mm:00000000772bcb16 type:MM_FILEPAGES val:33 [ 32.019628] BUG: Bad rss-counter state mm:00000000772bcb16 type:MM_ANONPAGES val:22 [ 32.059376] ================================================================== [ 32.060327] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.061289] Read of size 8 at addr ffff88800c7bced8 by task sshd/219 [ 32.062062] [ 32.062283] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.063151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.064130] Call Trace: [ 32.064460] [ 32.064746] dump_stack_lvl+0x91/0xf0 [ 32.065241] print_report+0xcc/0x620 [ 32.065730] ? __virt_addr_valid+0x102/0x340 [ 32.066289] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.066904] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.067536] kasan_report+0xbe/0xf0 [ 32.068020] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.068657] vma_interval_tree_remove+0xc75/0xec0 [ 32.069263] vma_prepare+0xc54/0x11a0 [ 32.069739] __split_vma+0x5af/0x950 [ 32.070219] ? __pfx___split_vma+0x10/0x10 [ 32.070748] ? find_held_lock+0x2c/0x110 [ 32.071268] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.071828] ? lock_is_held_type+0x9f/0x120 [ 32.072364] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.072985] ? mtree_range_walk+0x632/0x900 [ 32.073541] ? mas_walk+0x5c7/0x7c0 [ 32.074012] do_vmi_munmap+0x1f1/0x2b0 [ 32.074506] mmap_region+0x1f9/0x2660 [ 32.074985] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.075497] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.076214] ? __pfx_lock_acquire+0x10/0x10 [ 32.076771] ? __pfx_mmap_region+0x10/0x10 [ 32.077300] ? security_mmap_addr+0x7d/0xa0 [ 32.077835] ? get_unmapped_area+0x1f5/0x3f0 [ 32.078389] do_mmap+0x854/0xf00 [ 32.078827] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.079327] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.079888] ksys_mmap_pgoff+0x3af/0x500 [ 32.080440] do_syscall_64+0x3f/0x90 [ 32.080940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.081621] RIP: 0033:0x7f4ea3e09d82 [ 32.082108] 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 [ 32.084353] RSP: 002b:00007ffc38eaf558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.085457] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4ea3e09d82 [ 32.086353] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4ea3243000 [ 32.087251] RBP: 00007f4ea3243000 R08: 0000000000000009 R09: 0000000000001000 [ 32.088145] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a70c4feb20 [ 32.089060] R13: 00007ffc38eaf570 R14: 00007ffc38eaf5a0 R15: 00007ffc38eaf900 [ 32.089920] [ 32.090215] [ 32.090432] Allocated by task 212: [ 32.090889] kasan_save_stack+0x22/0x50 [ 32.091411] kasan_set_track+0x25/0x30 [ 32.091926] __kasan_slab_alloc+0x59/0x70 [ 32.092485] kmem_cache_alloc+0x16b/0x370 [ 32.093021] vm_area_dup+0x20/0x160 [ 32.093476] __split_vma+0x170/0x950 [ 32.093941] split_vma+0xc6/0x110 [ 32.094381] mprotect_fixup+0x8d2/0xb30 [ 32.094886] do_mprotect_pkey+0x87e/0xd40 [ 32.095406] __x64_sys_mprotect+0x78/0xc0 [ 32.095935] do_syscall_64+0x3f/0x90 [ 32.096415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.097065] [ 32.097284] Freed by task 202: [ 32.097682] kasan_save_stack+0x22/0x50 [ 32.098184] kasan_set_track+0x25/0x30 [ 32.098690] kasan_save_free_info+0x2b/0x50 [ 32.099247] __kasan_slab_free+0x10a/0x190 [ 32.099780] kmem_cache_free+0x10d/0x4d0 [ 32.100298] rcu_core+0x8c8/0x2860 [ 32.100764] __do_softirq+0x1b7/0x7d4 [ 32.101248] [ 32.101467] Last potentially related work creation: [ 32.102056] kasan_save_stack+0x22/0x50 [ 32.102554] __kasan_record_aux_stack+0x8e/0xa0 [ 32.103140] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.103786] remove_vma+0x139/0x170 [ 32.104250] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.104845] do_vmi_munmap+0x1f1/0x2b0 [ 32.105343] __vm_munmap+0x138/0x3a0 [ 32.105820] __x64_sys_munmap+0x59/0x80 [ 32.106320] do_syscall_64+0x3f/0x90 [ 32.106795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.107450] [ 32.107674] The buggy address belongs to the object at ffff88800c7bce80 [ 32.107674] which belongs to the cache vm_area_struct of size 168 [ 32.109184] The buggy address is located 88 bytes inside of [ 32.109184] freed 168-byte region [ffff88800c7bce80, ffff88800c7bcf28) [ 32.110617] [ 32.110838] The buggy address belongs to the physical page: [ 32.111521] page:000000008b04b4ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7bc [ 32.112626] memcg:ffff888015a2ee01 [ 32.113062] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.113717] page_type: 0xffffffff() [ 32.114183] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.115137] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a2ee01 [ 32.116051] page dumped because: kasan: bad access detected [ 32.116731] [ 32.116956] Memory state around the buggy address: [ 32.117554] ffff88800c7bcd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.118424] ffff88800c7bce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.119282] >ffff88800c7bce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.120132] ^ [ 32.120858] ffff88800c7bcf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.121717] ffff88800c7bcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.122566] ================================================================== [ 32.123579] Disabling lock debugging due to kernel taint [ 33.772759] BUG: Bad rss-counter state mm:000000009d084a78 type:MM_FILEPAGES val:33 [ 33.773511] BUG: Bad rss-counter state mm:000000009d084a78 type:MM_ANONPAGES val:22 [ 34.277069] BUG: Bad rss-counter state mm:0000000049a99c70 type:MM_FILEPAGES val:33 [ 34.278261] BUG: Bad rss-counter state mm:0000000049a99c70 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60042' (ECDSA) to the list of known hosts. 2023/06/19 22:11:10 fuzzer started 2023/06/19 22:11:10 dialing manager at localhost:44161 2023/06/19 22:11:10 checking machine... 2023/06/19 22:11:10 checking revisions... [ 34.966153] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:11:10 testing simple program... [ 35.021931] cgroup: Unknown subsys name 'net' [ 35.065830] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:11:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864bb001 RDX=1ffffffff0a80fbe RSI=ffffffff8450d49f RDI=ffffffff85407df0 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bb032 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407d68 R15=ffff88806ce09a98 RIP=ffffffff811306b3 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 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=00007ffc86f795b8 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=00007fd473a00510000055ea60e6a790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f3db91bbc64 RSP=ffff88800d82f970 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f3db91bb000 R11=00000000000b6996 R12=ffff88800d82fa88 R13=0000000000000000 R14=ffff88800d9a0000 R15=ffff88800e26d080 RIP=ffffffff8135b910 RFL=00000216 [----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 00007f3db8902900 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=00007f28851ad650 CR3=000000000cb3c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f8f9bdc814352fcb00000000000ae988 XMM05=68e197b4df5b77e10000000000134f10 XMM06=dfcdbad4f1609c370000000000133da8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000