syzkaller login: [ 40.297013] BUG: Bad rss-counter state mm:0000000077239a35 type:MM_FILEPAGES val:33 [ 40.298439] BUG: Bad rss-counter state mm:0000000077239a35 type:MM_ANONPAGES val:22 [ 40.456574] ================================================================== [ 40.457604] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.458552] Read of size 8 at addr ffff88801648f5c8 by task sshd/226 [ 40.459444] [ 40.459671] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.460539] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.461562] Call Trace: [ 40.461892] [ 40.462186] dump_stack_lvl+0x91/0xf0 [ 40.462677] print_report+0xcc/0x620 [ 40.463172] ? __virt_addr_valid+0x102/0x340 [ 40.463728] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.464356] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.465009] kasan_report+0xbe/0xf0 [ 40.465494] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.466122] vma_interval_tree_remove+0xc75/0xec0 [ 40.466725] vma_prepare+0xc54/0x11a0 [ 40.467216] __split_vma+0x5af/0x950 [ 40.467701] ? __pfx___split_vma+0x10/0x10 [ 40.468238] ? find_held_lock+0x2c/0x110 [ 40.468787] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.469373] ? lock_is_held_type+0x9f/0x120 [ 40.469920] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.470545] ? mtree_range_walk+0x632/0x900 [ 40.471106] ? mas_walk+0x5c7/0x7c0 [ 40.471592] do_vmi_munmap+0x1f1/0x2b0 [ 40.472091] mmap_region+0x1f9/0x2660 [ 40.472597] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.473159] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.473886] ? __pfx_lock_acquire+0x10/0x10 [ 40.474436] ? __pfx_mmap_region+0x10/0x10 [ 40.474981] ? security_mmap_addr+0x7d/0xa0 [ 40.475522] ? get_unmapped_area+0x1f5/0x3f0 [ 40.476091] do_mmap+0x854/0xf00 [ 40.476538] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.477064] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.477635] ksys_mmap_pgoff+0x3af/0x500 [ 40.478154] do_syscall_64+0x3f/0x90 [ 40.478640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.479300] RIP: 0033:0x7feea8864d82 [ 40.479763] 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 [ 40.481962] RSP: 002b:00007ffefa25f928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.482897] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feea8864d82 [ 40.483790] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feea7c9e000 [ 40.484688] RBP: 00007feea7c9e000 R08: 0000000000000009 R09: 0000000000001000 [ 40.485593] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae081c3ec0 [ 40.486472] R13: 00007ffefa25f940 R14: 00007ffefa25f970 R15: 00007ffefa25fcd0 [ 40.487383] [ 40.487682] [ 40.487901] Allocated by task 219: [ 40.488361] kasan_save_stack+0x22/0x50 [ 40.488910] kasan_set_track+0x25/0x30 [ 40.489420] __kasan_slab_alloc+0x59/0x70 [ 40.489956] kmem_cache_alloc+0x16b/0x370 [ 40.490502] vm_area_dup+0x20/0x160 [ 40.490973] __split_vma+0x170/0x950 [ 40.491476] split_vma+0xc6/0x110 [ 40.491925] mprotect_fixup+0x8d2/0xb30 [ 40.492461] do_mprotect_pkey+0x87e/0xd40 [ 40.493003] __x64_sys_mprotect+0x78/0xc0 [ 40.493549] do_syscall_64+0x3f/0x90 [ 40.494042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.494709] [ 40.494928] Freed by task 219: [ 40.495329] kasan_save_stack+0x22/0x50 [ 40.495847] kasan_set_track+0x25/0x30 [ 40.496362] kasan_save_free_info+0x2b/0x50 [ 40.496925] __kasan_slab_free+0x10a/0x190 [ 40.497470] kmem_cache_free+0x10d/0x4d0 [ 40.498006] rcu_core+0x8c8/0x2860 [ 40.498468] __do_softirq+0x1b7/0x7d4 [ 40.498964] [ 40.499180] Last potentially related work creation: [ 40.499789] kasan_save_stack+0x22/0x50 [ 40.500301] __kasan_record_aux_stack+0x8e/0xa0 [ 40.500906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.501562] remove_vma+0x139/0x170 [ 40.502027] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.502610] do_vmi_munmap+0x1f1/0x2b0 [ 40.503118] __vm_munmap+0x138/0x3a0 [ 40.503603] __x64_sys_munmap+0x59/0x80 [ 40.504113] do_syscall_64+0x3f/0x90 [ 40.504636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.505331] [ 40.505553] The buggy address belongs to the object at ffff88801648f570 [ 40.505553] which belongs to the cache vm_area_struct of size 168 [ 40.507080] The buggy address is located 88 bytes inside of [ 40.507080] freed 168-byte region [ffff88801648f570, ffff88801648f618) [ 40.508555] [ 40.508784] The buggy address belongs to the physical page: [ 40.509463] page:000000005cd4da63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1648f [ 40.510602] memcg:ffff88800fb9a601 [ 40.511031] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.511692] page_type: 0xffffffff() [ 40.512156] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.513118] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb9a601 [ 40.514076] page dumped because: kasan: bad access detected [ 40.514766] [ 40.514990] Memory state around the buggy address: [ 40.515612] ffff88801648f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.516500] ffff88801648f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 40.517395] >ffff88801648f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.518279] ^ [ 40.518975] ffff88801648f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 40.519874] ffff88801648f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.520766] ================================================================== [ 40.521905] Disabling lock debugging due to kernel taint [ 42.427798] BUG: Bad rss-counter state mm:000000003ce74850 type:MM_FILEPAGES val:33 [ 42.429028] BUG: Bad rss-counter state mm:000000003ce74850 type:MM_ANONPAGES val:22 [ 42.827022] BUG: Bad rss-counter state mm:00000000b64a9792 type:MM_FILEPAGES val:33 [ 42.828207] BUG: Bad rss-counter state mm:00000000b64a9792 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7415' (ECDSA) to the list of known hosts. 2023/06/20 00:18:27 fuzzer started 2023/06/20 00:18:27 dialing manager at localhost:44161 2023/06/20 00:18:27 checking machine... 2023/06/20 00:18:27 checking revisions... [ 43.581802] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:18:27 testing simple program... [ 43.637764] cgroup: Unknown subsys name 'net' [ 43.706156] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:18:23 Registers: info registers vcpu 0 RAX=00000000fffffffe RBX=000055cbf7338d60 RCX=0000000000000000 RDX=fffffffffffffdd0 RSI=0000000000000000 RDI=000055cbf737beb0 RBP=00007ffe71662770 RSP=00007ffe71662608 R8 =0000000000000000 R9 =ffffffffffffff01 R10=0000000000000000 R11=0000000000000000 R12=00000000ffffffff R13=00000000fffffffa R14=000055cbf737beb0 R15=00000000fffffffe RIP=00007fb825ef0e30 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb82536e900 00000000 00000000 GS =0000 0000000000000000 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=00007fb8247ba810 CR3=000000000cab2000 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=d6f882186ae9576900000000000ae988 XMM05=ff9d46c0e68e142c0000000000135508 XMM06=13e856d8d71426c80000000000133f88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff8880992fb668 RCX=0000000080000000 RDX=ffff888016b951c0 RSI=ffffffff81143144 RDI=0000000000000006 RBP=00000000192fb668 RSP=ffff88801bb97bd0 R8 =0000000000000006 R9 =ffff8880992fb668 R10=00000000192fb668 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000020 R14=ffff8880192fb508 R15=ffff8880192fb558 RIP=ffffffff814c07f1 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 00007f8c344b4900 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=00007ffee2c63000 CR3=000000000cb92000 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