syzkaller login: [ 38.758732] BUG: Bad rss-counter state mm:0000000007b95afe type:MM_FILEPAGES val:33 [ 38.760110] BUG: Bad rss-counter state mm:0000000007b95afe type:MM_ANONPAGES val:22 [ 38.906106] ================================================================== [ 38.907037] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.907985] Read of size 8 at addr ffff88800c57ac20 by task sshd/225 [ 38.908776] [ 38.908997] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.910025] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.911020] Call Trace: [ 38.911344] <TASK> [ 38.911636] dump_stack_lvl+0x91/0xf0 [ 38.912138] print_report+0xcc/0x620 [ 38.912660] ? __virt_addr_valid+0x102/0x340 [ 38.913223] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.913854] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.914481] kasan_report+0xbe/0xf0 [ 38.914971] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.915609] vma_interval_tree_remove+0xc75/0xec0 [ 38.916223] vma_prepare+0xc54/0x11a0 [ 38.916728] __split_vma+0x5af/0x950 [ 38.917203] ? __pfx___split_vma+0x10/0x10 [ 38.917749] ? find_held_lock+0x2c/0x110 [ 38.918282] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.918870] ? lock_is_held_type+0x9f/0x120 [ 38.919424] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.920053] ? mtree_range_walk+0x632/0x900 [ 38.920644] ? mas_walk+0x5c7/0x7c0 [ 38.921129] do_vmi_munmap+0x1f1/0x2b0 [ 38.921633] mmap_region+0x1f9/0x2660 [ 38.922129] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.922652] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.923378] ? __pfx_lock_acquire+0x10/0x10 [ 38.923925] ? __pfx_mmap_region+0x10/0x10 [ 38.924477] ? security_mmap_addr+0x7d/0xa0 [ 38.925021] ? get_unmapped_area+0x1f5/0x3f0 [ 38.925583] do_mmap+0x854/0xf00 [ 38.926030] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.926529] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.927104] ksys_mmap_pgoff+0x3af/0x500 [ 38.927619] do_syscall_64+0x3f/0x90 [ 38.928109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928769] RIP: 0033:0x7fd98b377d82 [ 38.929234] 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 [ 38.931400] RSP: 002b:00007ffe5a049c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.932347] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd98b377d82 [ 38.933217] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd98a7b1000 [ 38.934087] RBP: 00007fd98a7b1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.934946] R10: 0000000000000812 R11: 0000000000000206 R12: 000056189d470d90 [ 38.935817] R13: 00007ffe5a049c70 R14: 00007ffe5a049ca0 R15: 00007ffe5a04a000 [ 38.936712] </TASK> [ 38.937009] [ 38.937232] Allocated by task 218: [ 38.937667] kasan_save_stack+0x22/0x50 [ 38.938180] kasan_set_track+0x25/0x30 [ 38.938681] __kasan_slab_alloc+0x59/0x70 [ 38.939216] kmem_cache_alloc+0x16b/0x370 [ 38.939741] vm_area_dup+0x20/0x160 [ 38.940202] __split_vma+0x170/0x950 [ 38.940693] split_vma+0xc6/0x110 [ 38.941143] mprotect_fixup+0x8d2/0xb30 [ 38.941659] do_mprotect_pkey+0x87e/0xd40 [ 38.942186] __x64_sys_mprotect+0x78/0xc0 [ 38.942726] do_syscall_64+0x3f/0x90 [ 38.943216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.943897] [ 38.944122] Freed by task 218: [ 38.944532] kasan_save_stack+0x22/0x50 [ 38.945075] kasan_set_track+0x25/0x30 [ 38.945588] kasan_save_free_info+0x2b/0x50 [ 38.946146] __kasan_slab_free+0x10a/0x190 [ 38.946706] kmem_cache_free+0x10d/0x4d0 [ 38.947240] rcu_core+0x8c8/0x2860 [ 38.947738] __do_softirq+0x1b7/0x7d4 [ 38.948247] [ 38.948479] Last potentially related work creation: [ 38.949093] kasan_save_stack+0x22/0x50 [ 38.949617] __kasan_record_aux_stack+0x8e/0xa0 [ 38.950219] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.950902] remove_vma+0x139/0x170 [ 38.951440] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.952040] do_vmi_munmap+0x1f1/0x2b0 [ 38.952552] __vm_munmap+0x138/0x3a0 [ 38.953037] __x64_sys_munmap+0x59/0x80 [ 38.953558] do_syscall_64+0x3f/0x90 [ 38.954056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.954745] [ 38.954967] Second to last potentially related work creation: [ 38.955683] kasan_save_stack+0x22/0x50 [ 38.956203] __kasan_record_aux_stack+0x8e/0xa0 [ 38.956806] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.957475] remove_vma+0x139/0x170 [ 38.957959] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.958544] do_vmi_munmap+0x1f1/0x2b0 [ 38.959049] mmap_region+0x1f9/0x2660 [ 38.959555] do_mmap+0x854/0xf00 [ 38.960010] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.960549] ksys_mmap_pgoff+0x3af/0x500 [ 38.961092] do_syscall_64+0x3f/0x90 [ 38.961595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.962274] [ 38.962507] The buggy address belongs to the object at ffff88800c57abc8 [ 38.962507] which belongs to the cache vm_area_struct of size 168 [ 38.964053] The buggy address is located 88 bytes inside of [ 38.964053] freed 168-byte region [ffff88800c57abc8, ffff88800c57ac70) [ 38.965525] [ 38.965741] The buggy address belongs to the physical page: [ 38.966403] page:0000000064897380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc57a [ 38.967483] memcg:ffff88800e04b001 [ 38.967912] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.968558] page_type: 0xffffffff() [ 38.969009] raw: 0100000000000200 ffff8880087a0c80 ffffea00003169c0 dead000000000008 [ 38.969924] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e04b001 [ 38.970833] page dumped because: kasan: bad access detected [ 38.971485] [ 38.971700] Memory state around the buggy address: [ 38.972271] ffff88800c57ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.973137] ffff88800c57ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.973980] >ffff88800c57ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.974835] ^ [ 38.975357] ffff88800c57ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.976212] ffff88800c57ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.977076] ================================================================== [ 38.978073] Disabling lock debugging due to kernel taint [ 40.970615] BUG: Bad rss-counter state mm:00000000a1f35bcc type:MM_FILEPAGES val:33 [ 40.971612] BUG: Bad rss-counter state mm:00000000a1f35bcc type:MM_ANONPAGES val:22 [ 41.487581] BUG: Bad rss-counter state mm:000000002f291ebf type:MM_FILEPAGES val:33 [ 41.488776] BUG: Bad rss-counter state mm:000000002f291ebf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41719' (ECDSA) to the list of known hosts. 2023/06/20 12:17:39 fuzzer started 2023/06/20 12:17:39 dialing manager at localhost:36067 2023/06/20 12:17:39 checking machine... 2023/06/20 12:17:39 checking revisions... [ 42.194883] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:17:40 testing simple program... [ 42.244693] cgroup: Unknown subsys name 'net' [ 42.292913] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:17:39 Registers: info registers vcpu 0 RAX=ffffffff8363b743 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015a77ac8 RSI=ffffffff8363b743 RDI=ffff888015a77a80 RBP=ffff888015a77ad8 RSP=ffff888015a77a10 R8 =0000000000000001 R9 =ffff888015a77ac0 R10=0000000000038001 R11=000000000008a95e R12=ffff888015a77b48 R13=ffff888015a77ac8 R14=ffff888017741b40 R15=ffff888015a77a80 RIP=ffffffff81130641 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 00007fe342f9b900 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=00007fe3435530b0 CR3=0000000014710000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806cf293d8 RBP=ffff88806cf293c0 RSP=ffff888008da7ad0 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000003 R12=0000000000000293 R13=ffff888008da7c98 R14=ffffed10011b4f97 R15=dffffc0000000000 RIP=ffffffff812d8e70 RFL=00000046 [---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 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=00007f9736ddab80 CR3=000000000978a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3b1c178664cf21d600000000000ae988 XMM05=a2ebb77df7b88ca900000000001350b0 XMM06=e7a3b750822471340000000000133f10 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000