syzkaller login: [ 30.499274] BUG: Bad rss-counter state mm:000000001815a2da type:MM_FILEPAGES val:33 [ 30.500553] BUG: Bad rss-counter state mm:000000001815a2da type:MM_ANONPAGES val:22 [ 30.639946] ================================================================== [ 30.641118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.642292] Read of size 8 at addr ffff888010399880 by task sshd/221 [ 30.643429] [ 30.643706] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.644810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.645832] Call Trace: [ 30.646165] [ 30.646467] dump_stack_lvl+0x91/0xf0 [ 30.646980] print_report+0xcc/0x620 [ 30.647487] ? __virt_addr_valid+0x102/0x340 [ 30.648056] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.648705] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.649354] kasan_report+0xbe/0xf0 [ 30.649848] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.650487] vma_interval_tree_remove+0xc75/0xec0 [ 30.651126] vma_prepare+0xc54/0x11a0 [ 30.651630] __split_vma+0x5af/0x950 [ 30.652127] ? __pfx___split_vma+0x10/0x10 [ 30.652693] ? find_held_lock+0x2c/0x110 [ 30.653246] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.653841] ? lock_is_held_type+0x9f/0x120 [ 30.654413] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.655052] ? mtree_range_walk+0x632/0x900 [ 30.655625] ? mas_walk+0x5c7/0x7c0 [ 30.656120] do_vmi_munmap+0x1f1/0x2b0 [ 30.656659] mmap_region+0x1f9/0x2660 [ 30.657170] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.657711] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.658476] ? __pfx_lock_acquire+0x10/0x10 [ 30.659038] ? __pfx_mmap_region+0x10/0x10 [ 30.659597] ? security_mmap_addr+0x7d/0xa0 [ 30.660165] ? get_unmapped_area+0x1f5/0x3f0 [ 30.660757] do_mmap+0x854/0xf00 [ 30.661218] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.661740] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.662344] ksys_mmap_pgoff+0x3af/0x500 [ 30.662891] do_syscall_64+0x3f/0x90 [ 30.663396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.664087] RIP: 0033:0x7fdbf3a49d82 [ 30.664580] 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 [ 30.666827] RSP: 002b:00007ffeaacfa618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.667798] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbf3a49d82 [ 30.668704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbf2e83000 [ 30.669603] RBP: 00007fdbf2e83000 R08: 0000000000000009 R09: 0000000000001000 [ 30.670513] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557eb655fec0 [ 30.671414] R13: 00007ffeaacfa630 R14: 00007ffeaacfa660 R15: 00007ffeaacfa9c0 [ 30.672334] [ 30.672646] [ 30.672872] Allocated by task 214: [ 30.673326] kasan_save_stack+0x22/0x50 [ 30.673866] kasan_set_track+0x25/0x30 [ 30.674383] __kasan_slab_alloc+0x59/0x70 [ 30.674939] kmem_cache_alloc+0x16b/0x370 [ 30.675486] vm_area_dup+0x20/0x160 [ 30.675970] __split_vma+0x170/0x950 [ 30.676473] split_vma+0xc6/0x110 [ 30.676935] mprotect_fixup+0x8d2/0xb30 [ 30.677467] do_mprotect_pkey+0x87e/0xd40 [ 30.678020] __x64_sys_mprotect+0x78/0xc0 [ 30.678573] do_syscall_64+0x3f/0x90 [ 30.679071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.679755] [ 30.679985] Freed by task 214: [ 30.680405] kasan_save_stack+0x22/0x50 [ 30.680928] kasan_set_track+0x25/0x30 [ 30.681450] kasan_save_free_info+0x2b/0x50 [ 30.682020] __kasan_slab_free+0x10a/0x190 [ 30.682586] kmem_cache_free+0x10d/0x4d0 [ 30.683117] rcu_core+0x8c8/0x2860 [ 30.683641] __do_softirq+0x1b7/0x7d4 [ 30.684143] [ 30.684363] Last potentially related work creation: [ 30.685002] kasan_save_stack+0x22/0x50 [ 30.685530] __kasan_record_aux_stack+0x8e/0xa0 [ 30.686132] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.686811] remove_vma+0x139/0x170 [ 30.687285] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.687880] do_vmi_munmap+0x1f1/0x2b0 [ 30.688394] __vm_munmap+0x138/0x3a0 [ 30.688880] __x64_sys_munmap+0x59/0x80 [ 30.689414] do_syscall_64+0x3f/0x90 [ 30.689923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.690609] [ 30.690839] The buggy address belongs to the object at ffff888010399828 [ 30.690839] which belongs to the cache vm_area_struct of size 168 [ 30.692416] The buggy address is located 88 bytes inside of [ 30.692416] freed 168-byte region [ffff888010399828, ffff8880103998d0) [ 30.693913] [ 30.694142] The buggy address belongs to the physical page: [ 30.694853] page:0000000052555dee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10399 [ 30.696008] memcg:ffff888015d04401 [ 30.696470] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.697160] page_type: 0xffffffff() [ 30.697631] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.698623] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d04401 [ 30.699596] page dumped because: kasan: bad access detected [ 30.700293] [ 30.700522] Memory state around the buggy address: [ 30.701142] ffff888010399780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.702055] ffff888010399800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.702960] >ffff888010399880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.703854] ^ [ 30.704289] ffff888010399900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.705218] ffff888010399980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.706114] ================================================================== [ 30.707079] Disabling lock debugging due to kernel taint [ 32.621285] BUG: Bad rss-counter state mm:00000000943497eb type:MM_FILEPAGES val:33 [ 32.622682] BUG: Bad rss-counter state mm:00000000943497eb type:MM_ANONPAGES val:22 [ 33.173758] BUG: Bad rss-counter state mm:00000000a2d8806c type:MM_FILEPAGES val:33 [ 33.174776] BUG: Bad rss-counter state mm:00000000a2d8806c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25725' (ECDSA) to the list of known hosts. 2023/06/20 06:47:26 fuzzer started 2023/06/20 06:47:26 dialing manager at localhost:44161 2023/06/20 06:47:27 checking machine... 2023/06/20 06:47:27 checking revisions... [ 33.822322] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:47:27 testing simple program... [ 33.859212] cgroup: Unknown subsys name 'net' [ 33.899856] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:47:26 Registers: info registers vcpu 0 RAX=ffffffff860d68f6 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=dffffc0000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffff88800ebb7ab8 RSP=ffff88800ebb79f0 R8 =ffffffff860d68c0 R9 =ffff88800ebb7aa0 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800ebb7ac0 R13=ffff88800ebb7aa8 R14=ffff88800ebb7aa1 R15=ffff88800ebb7a60 RIP=ffffffff81130a4c RFL=00000286 [--S--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 00007fd67fb05900 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=00007fd6800ba650 CR3=000000000c9d2000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000cc0 RDX=0000000000000001 RSI=0000000000092cc0 RDI=ffff88800844f780 RBP=ffff88800da0f5c8 RSP=ffff88800da0f5a8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffed100323ad30 R11=00000000000b6996 R12=ffff8880191d6980 R13=0000000000000000 R14=ffff8880095b5080 R15=0000000000000000 RIP=ffffffff81807d60 RFL=00000206 [-----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 00007f8ff8394900 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=00007f8ff78b4000 CR3=000000000d8ca000 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=2ba9637c099628c800000000000ae988 XMM05=0dcac3b30cee38d00000000000134e88 XMM06=aa902f5cc6e28c6c0000000000133f30 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000