syzkaller login: [ 32.016665] BUG: Bad rss-counter state mm:00000000cc7cc08c type:MM_FILEPAGES val:33 [ 32.017860] BUG: Bad rss-counter state mm:00000000cc7cc08c type:MM_ANONPAGES val:22 [ 32.056090] ================================================================== [ 32.057329] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.058654] Read of size 8 at addr ffff88800ca2fd08 by task sshd/221 [ 32.059691] [ 32.059935] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.060904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.062038] Call Trace: [ 32.062363] [ 32.062708] dump_stack_lvl+0x91/0xf0 [ 32.063227] print_report+0xcc/0x620 [ 32.063727] ? __virt_addr_valid+0x102/0x340 [ 32.064340] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.065014] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.065681] kasan_report+0xbe/0xf0 [ 32.066215] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.066842] vma_interval_tree_remove+0xc75/0xec0 [ 32.067435] vma_prepare+0xc54/0x11a0 [ 32.067910] __split_vma+0x5af/0x950 [ 32.068383] ? __pfx___split_vma+0x10/0x10 [ 32.068911] ? find_held_lock+0x2c/0x110 [ 32.069432] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.070018] ? lock_is_held_type+0x9f/0x120 [ 32.070552] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.071156] ? mtree_range_walk+0x632/0x900 [ 32.071711] ? mas_walk+0x5c7/0x7c0 [ 32.072185] do_vmi_munmap+0x1f1/0x2b0 [ 32.072675] mmap_region+0x1f9/0x2660 [ 32.073150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.073656] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.074367] ? __pfx_lock_acquire+0x10/0x10 [ 32.074896] ? __pfx_mmap_region+0x10/0x10 [ 32.075419] ? security_mmap_addr+0x7d/0xa0 [ 32.075942] ? get_unmapped_area+0x1f5/0x3f0 [ 32.076484] do_mmap+0x854/0xf00 [ 32.076922] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.077417] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.078002] ksys_mmap_pgoff+0x3af/0x500 [ 32.078506] do_syscall_64+0x3f/0x90 [ 32.078986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.079634] RIP: 0033:0x7effbfd33d82 [ 32.080098] 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 [ 32.082241] RSP: 002b:00007ffd74acb7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.083148] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007effbfd33d82 [ 32.083988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007effbf16d000 [ 32.084842] RBP: 00007effbf16d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.085695] R10: 0000000000000812 R11: 0000000000000206 R12: 000056237c2c8ec0 [ 32.086547] R13: 00007ffd74acb7d0 R14: 00007ffd74acb800 R15: 00007ffd74acbb60 [ 32.087415] [ 32.087708] [ 32.087925] Allocated by task 214: [ 32.088353] kasan_save_stack+0x22/0x50 [ 32.088862] kasan_set_track+0x25/0x30 [ 32.089367] __kasan_slab_alloc+0x59/0x70 [ 32.089898] kmem_cache_alloc+0x16b/0x370 [ 32.090429] vm_area_dup+0x20/0x160 [ 32.090885] __split_vma+0x170/0x950 [ 32.091354] split_vma+0xc6/0x110 [ 32.091798] mprotect_fixup+0x8d2/0xb30 [ 32.092305] do_mprotect_pkey+0x87e/0xd40 [ 32.092825] __x64_sys_mprotect+0x78/0xc0 [ 32.093339] do_syscall_64+0x3f/0x90 [ 32.093807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.094452] [ 32.094664] Freed by task 204: [ 32.095052] kasan_save_stack+0x22/0x50 [ 32.095553] kasan_set_track+0x25/0x30 [ 32.096051] kasan_save_free_info+0x2b/0x50 [ 32.096585] __kasan_slab_free+0x10a/0x190 [ 32.097116] kmem_cache_free+0x10d/0x4d0 [ 32.097622] rcu_core+0x8c8/0x2860 [ 32.098073] __do_softirq+0x1b7/0x7d4 [ 32.098549] [ 32.098762] Last potentially related work creation: [ 32.099344] kasan_save_stack+0x22/0x50 [ 32.099910] __kasan_record_aux_stack+0x8e/0xa0 [ 32.100478] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.101113] remove_vma+0x139/0x170 [ 32.101563] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.102128] do_vmi_munmap+0x1f1/0x2b0 [ 32.102613] __vm_munmap+0x138/0x3a0 [ 32.103089] __x64_sys_munmap+0x59/0x80 [ 32.103586] do_syscall_64+0x3f/0x90 [ 32.104063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.104707] [ 32.104921] The buggy address belongs to the object at ffff88800ca2fcb0 [ 32.104921] which belongs to the cache vm_area_struct of size 168 [ 32.106398] The buggy address is located 88 bytes inside of [ 32.106398] freed 168-byte region [ffff88800ca2fcb0, ffff88800ca2fd58) [ 32.107814] [ 32.108031] The buggy address belongs to the physical page: [ 32.108684] page:000000006258f2f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca2f [ 32.109756] memcg:ffff8880145d5a01 [ 32.110205] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.110867] page_type: 0xffffffff() [ 32.111317] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.112248] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880145d5a01 [ 32.113163] page dumped because: kasan: bad access detected [ 32.113850] [ 32.114082] Memory state around the buggy address: [ 32.114685] ffff88800ca2fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.115565] ffff88800ca2fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.116438] >ffff88800ca2fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.117294] ^ [ 32.117736] ffff88800ca2fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.118611] ffff88800ca2fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.119471] ================================================================== [ 32.120473] Disabling lock debugging due to kernel taint [ 34.049561] BUG: Bad rss-counter state mm:0000000072ee0985 type:MM_FILEPAGES val:33 [ 34.050564] BUG: Bad rss-counter state mm:0000000072ee0985 type:MM_ANONPAGES val:22 [ 34.591973] BUG: Bad rss-counter state mm:00000000cc02cd59 type:MM_FILEPAGES val:33 [ 34.593319] BUG: Bad rss-counter state mm:00000000cc02cd59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25474' (ECDSA) to the list of known hosts. 2023/06/20 04:50:14 fuzzer started 2023/06/20 04:50:15 dialing manager at localhost:44161 2023/06/20 04:50:15 checking machine... 2023/06/20 04:50:15 checking revisions... [ 35.314816] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:50:15 testing simple program... [ 35.358506] cgroup: Unknown subsys name 'net' [ 35.400702] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:50:13 Registers: info registers vcpu 0 RAX=ffffffff83639aca RBX=0000000000000001 RCX=ffffffff863b1762 RDX=dffffc0000000000 RSI=ffff88801466fb28 RDI=1ffff110028cde6f RBP=ffff88801466f378 RSP=ffff88801466f2b0 R8 =ffffffff863b1766 R9 =ffff88801466f360 R10=0000000000038001 R11=000000000008a899 R12=ffff88801466f380 R13=ffff88801466f368 R14=ffff88801466fb30 R15=ffff88801466f320 RIP=ffffffff8113106f 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 00007fb2c0036900 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=00007ff7cc234650 CR3=000000000c69a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=cbd4ae61001d155200000000000ae988 XMM05=6f14e8df661f11d00000000000134ef8 XMM06=8eb5e063e676a9920000000000133c98 XMM07=fb795ef6d657705600000000001241d8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009431130 RCX=ffff88800844f780 RDX=ffffea00003a95c0 RSI=ffff88800e84cf00 RDI=ffff8880087b6780 RBP=0000000000000000 RSP=ffff888019e77a38 R8 =ffff88800ea57390 R9 =0000000000000000 R10=ffffea00003a1300 R11=00000000000c0004 R12=dffffc0000000000 R13=ffff888019e77a78 R14=ffff88800844f780 R15=ffff88800e84cf00 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007ff7cbc7f900 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=00007ffefcc3f000 CR3=00000000166ac000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000