syzkaller login: [ 28.902586] BUG: Bad rss-counter state mm:000000001da7b902 type:MM_FILEPAGES val:33 [ 28.903860] BUG: Bad rss-counter state mm:000000001da7b902 type:MM_ANONPAGES val:22 [ 29.070928] ================================================================== [ 29.071907] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.072835] Read of size 8 at addr ffff88800f7c0c20 by task sshd/220 [ 29.073594] [ 29.073903] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.074769] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.075748] Call Trace: [ 29.076106] [ 29.076390] dump_stack_lvl+0x91/0xf0 [ 29.076885] print_report+0xcc/0x620 [ 29.077373] ? __virt_addr_valid+0x102/0x340 [ 29.077923] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.078549] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.079174] kasan_report+0xbe/0xf0 [ 29.079656] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.080335] vma_interval_tree_remove+0xc75/0xec0 [ 29.080948] vma_prepare+0xc54/0x11a0 [ 29.081437] __split_vma+0x5af/0x950 [ 29.081921] ? __pfx___split_vma+0x10/0x10 [ 29.082456] ? find_held_lock+0x2c/0x110 [ 29.082975] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.083548] ? lock_is_held_type+0x9f/0x120 [ 29.084107] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.084720] ? mtree_range_walk+0x632/0x900 [ 29.085271] ? mas_walk+0x5c7/0x7c0 [ 29.085744] do_vmi_munmap+0x1f1/0x2b0 [ 29.086243] mmap_region+0x1f9/0x2660 [ 29.086725] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.087241] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.087998] ? __pfx_lock_acquire+0x10/0x10 [ 29.088538] ? __pfx_mmap_region+0x10/0x10 [ 29.089074] ? security_mmap_addr+0x7d/0xa0 [ 29.089619] ? get_unmapped_area+0x1f5/0x3f0 [ 29.090187] do_mmap+0x854/0xf00 [ 29.090635] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.091128] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.091703] ksys_mmap_pgoff+0x3af/0x500 [ 29.092235] do_syscall_64+0x3f/0x90 [ 29.092722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.093369] RIP: 0033:0x7f3295825d82 [ 29.093830] 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 [ 29.096005] RSP: 002b:00007ffc90262228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.096909] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3295825d82 [ 29.097755] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3294c5f000 [ 29.098606] RBP: 00007f3294c5f000 R08: 0000000000000009 R09: 0000000000001000 [ 29.099455] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557acfd91ec0 [ 29.100313] R13: 00007ffc90262240 R14: 00007ffc90262270 R15: 00007ffc902625d0 [ 29.101163] [ 29.101453] [ 29.101667] Allocated by task 212: [ 29.102096] kasan_save_stack+0x22/0x50 [ 29.102602] kasan_set_track+0x25/0x30 [ 29.103090] __kasan_slab_alloc+0x59/0x70 [ 29.103617] kmem_cache_alloc+0x16b/0x370 [ 29.104138] vm_area_dup+0x20/0x160 [ 29.104592] __split_vma+0x170/0x950 [ 29.105060] split_vma+0xc6/0x110 [ 29.105497] mprotect_fixup+0x8d2/0xb30 [ 29.106000] do_mprotect_pkey+0x87e/0xd40 [ 29.106515] __x64_sys_mprotect+0x78/0xc0 [ 29.107036] do_syscall_64+0x3f/0x90 [ 29.107504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.108161] [ 29.108384] Freed by task 13: [ 29.108773] kasan_save_stack+0x22/0x50 [ 29.109274] kasan_set_track+0x25/0x30 [ 29.109768] kasan_save_free_info+0x2b/0x50 [ 29.110297] __kasan_slab_free+0x10a/0x190 [ 29.110837] kmem_cache_free+0x10d/0x4d0 [ 29.111346] rcu_core+0x8c8/0x2860 [ 29.111795] __do_softirq+0x1b7/0x7d4 [ 29.112275] [ 29.112489] Last potentially related work creation: [ 29.113070] kasan_save_stack+0x22/0x50 [ 29.113571] __kasan_record_aux_stack+0x8e/0xa0 [ 29.114150] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.114791] remove_vma+0x139/0x170 [ 29.115247] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.115796] do_vmi_munmap+0x1f1/0x2b0 [ 29.116298] __vm_munmap+0x138/0x3a0 [ 29.116768] __x64_sys_munmap+0x59/0x80 [ 29.117264] do_syscall_64+0x3f/0x90 [ 29.117737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.118381] [ 29.118597] Second to last potentially related work creation: [ 29.119287] kasan_save_stack+0x22/0x50 [ 29.119786] __kasan_record_aux_stack+0x8e/0xa0 [ 29.120375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.121018] remove_vma+0x139/0x170 [ 29.121467] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.122022] do_vmi_munmap+0x1f1/0x2b0 [ 29.122499] __vm_munmap+0x138/0x3a0 [ 29.122976] elf_map+0x26f/0x310 [ 29.123420] load_elf_binary+0x3417/0x5030 [ 29.123968] bprm_execve+0x803/0x1940 [ 29.124442] do_execveat_common+0x734/0x8e0 [ 29.124971] __x64_sys_execve+0x93/0xc0 [ 29.125463] do_syscall_64+0x3f/0x90 [ 29.125937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.126569] [ 29.126782] The buggy address belongs to the object at ffff88800f7c0bc8 [ 29.126782] which belongs to the cache vm_area_struct of size 168 [ 29.128266] The buggy address is located 88 bytes inside of [ 29.128266] freed 168-byte region [ffff88800f7c0bc8, ffff88800f7c0c70) [ 29.129664] [ 29.129877] The buggy address belongs to the physical page: [ 29.130542] page:000000006eff8105 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf7c0 [ 29.131631] memcg:ffff88800e7d6601 [ 29.132066] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.132764] page_type: 0xffffffff() [ 29.133216] raw: 0100000000000200 ffff88800879fc80 ffffea00003283c0 dead000000000007 [ 29.134130] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7d6601 [ 29.135029] page dumped because: kasan: bad access detected [ 29.135700] [ 29.135933] Memory state around the buggy address: [ 29.136507] ffff88800f7c0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.137372] ffff88800f7c0b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.138229] >ffff88800f7c0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.139088] ^ [ 29.139615] ffff88800f7c0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.140478] ffff88800f7c0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.141328] ================================================================== [ 29.142507] Disabling lock debugging due to kernel taint [ 31.551469] BUG: Bad rss-counter state mm:000000009419f2d4 type:MM_FILEPAGES val:33 [ 31.552667] BUG: Bad rss-counter state mm:000000009419f2d4 type:MM_ANONPAGES val:22 [ 32.015738] BUG: Bad rss-counter state mm:00000000a7eb1c05 type:MM_FILEPAGES val:33 [ 32.017009] BUG: Bad rss-counter state mm:00000000a7eb1c05 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6906' (ECDSA) to the list of known hosts. 2023/06/20 06:47:15 fuzzer started 2023/06/20 06:47:15 dialing manager at localhost:44161 2023/06/20 06:47:15 checking machine... 2023/06/20 06:47:15 checking revisions... [ 32.672652] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:47:15 testing simple program... [ 32.726134] cgroup: Unknown subsys name 'net' [ 32.768796] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:47:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880196f3680 RSI=0000000000000004 RDI=ffff88800ef8b49c RBP=ffff88800ef8b3c0 RSP=ffff88801032faf0 R8 =0000000000000004 R9 =0000000000000040 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800ef8b49c R13=ffff88800ef8b3c0 R14=00000000000000f4 R15=0000000000000001 RIP=ffffffff8180fd20 RFL=00000293 [--S-A-C] 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 00007fac33a04900 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=00007ffdf6668000 CR3=000000000c4b2000 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=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 info registers vcpu 1 RAX=0000000000006097 RBX=0000000000000002 RCX=ffffffff81132ffd RDX=0000000000006098 RSI=000000000000132f RDI=ffffffff8609675c RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =ffffffff86096756 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130868 RFL=00000287 [--S--PC] 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=00007fef8cae65b0 CR3=000000000c7a2000 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=00000000000000000000000000000000 XMM01=c372ef04038f75b4654b971bfbe48aa9 XMM02=ec2efd57dc4c00df000000000011ff98 XMM03=f218e428c313eedf0000000000120068 XMM04=1ff2ede34d609e2e00000000000ae988 XMM05=19e9129bd510f23500000000001358d8 XMM06=111b11d064d58baa0000000000134740 XMM07=e042d86d42eb936e00000000001248e8 XMM08=f218e428c313eedf0000000000120068 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000