syzkaller login: [ 54.313809] BUG: Bad rss-counter state mm:00000000837c0375 type:MM_FILEPAGES val:33 [ 54.315248] BUG: Bad rss-counter state mm:00000000837c0375 type:MM_ANONPAGES val:22 [ 54.484207] ================================================================== [ 54.485506] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.486739] Read of size 8 at addr ffff88800d88f058 by task sshd/225 [ 54.487720] [ 54.487999] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.489047] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.490240] Call Trace: [ 54.490638] [ 54.491016] dump_stack_lvl+0x91/0xf0 [ 54.491609] print_report+0xcc/0x620 [ 54.492215] ? __virt_addr_valid+0x102/0x340 [ 54.492937] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.493740] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.494549] kasan_report+0xbe/0xf0 [ 54.495187] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.496005] vma_interval_tree_remove+0xc75/0xec0 [ 54.496785] vma_prepare+0xc54/0x11a0 [ 54.497407] __split_vma+0x5af/0x950 [ 54.498023] ? __pfx___split_vma+0x10/0x10 [ 54.498702] ? find_held_lock+0x2c/0x110 [ 54.499407] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.500003] ? lock_is_held_type+0x9f/0x120 [ 54.500552] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.501185] ? mtree_range_walk+0x632/0x900 [ 54.501751] ? mas_walk+0x5c7/0x7c0 [ 54.502249] do_vmi_munmap+0x1f1/0x2b0 [ 54.502747] mmap_region+0x1f9/0x2660 [ 54.503271] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.503803] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.504533] ? __pfx_lock_acquire+0x10/0x10 [ 54.505093] ? __pfx_mmap_region+0x10/0x10 [ 54.505639] ? security_mmap_addr+0x7d/0xa0 [ 54.506196] ? get_unmapped_area+0x1f5/0x3f0 [ 54.506760] do_mmap+0x854/0xf00 [ 54.507231] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.507735] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.508320] ksys_mmap_pgoff+0x3af/0x500 [ 54.508851] do_syscall_64+0x3f/0x90 [ 54.509335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.510006] RIP: 0033:0x7fe8bfdbed82 [ 54.510473] 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 [ 54.512660] RSP: 002b:00007fff862a40d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.513596] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe8bfdbed82 [ 54.514470] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe8bf1f8000 [ 54.515353] RBP: 00007fe8bf1f8000 R08: 0000000000000009 R09: 0000000000001000 [ 54.516224] R10: 0000000000000812 R11: 0000000000000206 R12: 000056218a5cbf70 [ 54.517097] R13: 00007fff862a40f0 R14: 00007fff862a4120 R15: 00007fff862a4480 [ 54.517975] [ 54.518277] [ 54.518496] Allocated by task 218: [ 54.518973] kasan_save_stack+0x22/0x50 [ 54.519490] kasan_set_track+0x25/0x30 [ 54.520006] __kasan_slab_alloc+0x59/0x70 [ 54.520543] kmem_cache_alloc+0x16b/0x370 [ 54.521087] vm_area_dup+0x20/0x160 [ 54.521551] __split_vma+0x170/0x950 [ 54.522041] split_vma+0xc6/0x110 [ 54.522495] mprotect_fixup+0x8d2/0xb30 [ 54.523041] do_mprotect_pkey+0x87e/0xd40 [ 54.523571] __x64_sys_mprotect+0x78/0xc0 [ 54.524104] do_syscall_64+0x3f/0x90 [ 54.524585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.525255] [ 54.525477] Freed by task 218: [ 54.525909] kasan_save_stack+0x22/0x50 [ 54.526582] kasan_set_track+0x25/0x30 [ 54.527122] kasan_save_free_info+0x2b/0x50 [ 54.527669] __kasan_slab_free+0x10a/0x190 [ 54.528217] kmem_cache_free+0x10d/0x4d0 [ 54.528739] rcu_core+0x8c8/0x2860 [ 54.529208] __do_softirq+0x1b7/0x7d4 [ 54.529693] [ 54.529930] Last potentially related work creation: [ 54.530517] kasan_save_stack+0x22/0x50 [ 54.531055] __kasan_record_aux_stack+0x8e/0xa0 [ 54.531637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.532304] remove_vma+0x139/0x170 [ 54.532762] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.533340] do_vmi_munmap+0x1f1/0x2b0 [ 54.533851] __vm_munmap+0x138/0x3a0 [ 54.534328] __x64_sys_munmap+0x59/0x80 [ 54.534868] do_syscall_64+0x3f/0x90 [ 54.535354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.536013] [ 54.536232] The buggy address belongs to the object at ffff88800d88f000 [ 54.536232] which belongs to the cache vm_area_struct of size 168 [ 54.537712] The buggy address is located 88 bytes inside of [ 54.537712] freed 168-byte region [ffff88800d88f000, ffff88800d88f0a8) [ 54.539163] [ 54.539387] The buggy address belongs to the physical page: [ 54.540061] page:0000000068559a2a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd88f [ 54.541165] memcg:ffff88800e085201 [ 54.541597] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 54.542338] page_type: 0xffffffff() [ 54.542847] raw: 0100000000000200 ffff88800879fc80 ffffea0000580dc0 dead000000000003 [ 54.543793] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e085201 [ 54.544706] page dumped because: kasan: bad access detected [ 54.545407] [ 54.545625] Memory state around the buggy address: [ 54.546229] ffff88800d88ef00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 54.547116] ffff88800d88ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 54.548029] >ffff88800d88f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.548916] ^ [ 54.549660] ffff88800d88f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 54.550554] ffff88800d88f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.551467] ================================================================== [ 54.552595] Disabling lock debugging due to kernel taint [ 56.700934] BUG: Bad rss-counter state mm:0000000098eea137 type:MM_FILEPAGES val:33 [ 56.702415] BUG: Bad rss-counter state mm:0000000098eea137 type:MM_ANONPAGES val:22 [ 57.194820] BUG: Bad rss-counter state mm:00000000e06d405c type:MM_FILEPAGES val:33 [ 57.196446] BUG: Bad rss-counter state mm:00000000e06d405c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39978' (ECDSA) to the list of known hosts. 2023/06/19 16:50:23 fuzzer started 2023/06/19 16:50:24 dialing manager at localhost:44161 2023/06/19 16:50:24 checking machine... 2023/06/19 16:50:24 checking revisions... [ 57.929169] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:50:24 testing simple program... [ 57.980265] cgroup: Unknown subsys name 'net' [ 58.020588] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:50:00 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=0000000000000000 RCX=0000000080000100 RDX=ffff88800fb8d1c0 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff888019f21ec0 RIP=ffffffff814c07f1 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 00007f4c1235b900 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=00007f4c117ce8c0 CR3=000000000ec14000 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=0a3f3737ed1c1a6600000000000ae988 XMM05=13ba4411aa46df7500000000001351b0 XMM06=13e856d8d71426c800000000001340e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00000000fffffffd RCX=ffffffff81210de1 RDX=ffff8880160d51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801bfafbf8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07eb 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 00007f8cd8e2f900 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=00007ffc01fe2000 CR3=000000001a110000 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