syzkaller login: [ 38.754614] BUG: Bad rss-counter state mm:000000003fb2ad5a type:MM_FILEPAGES val:33 [ 38.755907] BUG: Bad rss-counter state mm:000000003fb2ad5a type:MM_ANONPAGES val:22 [ 38.928376] ================================================================== [ 38.929299] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.930233] Read of size 8 at addr ffff8880183c3b38 by task sshd/219 [ 38.931162] [ 38.931381] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.932255] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.933244] Call Trace: [ 38.933559] [ 38.933844] dump_stack_lvl+0x91/0xf0 [ 38.934337] print_report+0xcc/0x620 [ 38.934859] ? __virt_addr_valid+0x102/0x340 [ 38.935414] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.936038] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.936656] kasan_report+0xbe/0xf0 [ 38.937125] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.937748] vma_interval_tree_remove+0xc75/0xec0 [ 38.938344] vma_prepare+0xc54/0x11a0 [ 38.938837] __split_vma+0x5af/0x950 [ 38.939307] ? __pfx___split_vma+0x10/0x10 [ 38.939834] ? find_held_lock+0x2c/0x110 [ 38.940397] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.940962] ? lock_is_held_type+0x9f/0x120 [ 38.941529] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.942144] ? mtree_range_walk+0x632/0x900 [ 38.942700] ? mas_walk+0x5c7/0x7c0 [ 38.943172] do_vmi_munmap+0x1f1/0x2b0 [ 38.943663] mmap_region+0x1f9/0x2660 [ 38.944140] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.944654] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.945367] ? __pfx_lock_acquire+0x10/0x10 [ 38.945901] ? __pfx_mmap_region+0x10/0x10 [ 38.946420] ? security_mmap_addr+0x7d/0xa0 [ 38.946994] ? get_unmapped_area+0x1f5/0x3f0 [ 38.947543] do_mmap+0x854/0xf00 [ 38.947988] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.948495] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.949073] ksys_mmap_pgoff+0x3af/0x500 [ 38.949587] do_syscall_64+0x3f/0x90 [ 38.950066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.950744] RIP: 0033:0x7fd8bd703d82 [ 38.951210] 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 [ 38.953369] RSP: 002b:00007ffc8be3b688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.954300] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd8bd703d82 [ 38.955179] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd8bcb3d000 [ 38.956029] RBP: 00007fd8bcb3d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.956884] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be22f50ec0 [ 38.957727] R13: 00007ffc8be3b6a0 R14: 00007ffc8be3b6d0 R15: 00007ffc8be3ba30 [ 38.958610] [ 38.958904] [ 38.959125] Allocated by task 212: [ 38.959556] kasan_save_stack+0x22/0x50 [ 38.960073] kasan_set_track+0x25/0x30 [ 38.960588] __kasan_slab_alloc+0x59/0x70 [ 38.961119] kmem_cache_alloc+0x16b/0x370 [ 38.961646] vm_area_dup+0x20/0x160 [ 38.962107] __split_vma+0x170/0x950 [ 38.962580] split_vma+0xc6/0x110 [ 38.963025] mprotect_fixup+0x8d2/0xb30 [ 38.963536] do_mprotect_pkey+0x87e/0xd40 [ 38.964071] __x64_sys_mprotect+0x78/0xc0 [ 38.964600] do_syscall_64+0x3f/0x90 [ 38.965080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.965730] [ 38.965950] Freed by task 212: [ 38.966351] kasan_save_stack+0x22/0x50 [ 38.966871] kasan_set_track+0x25/0x30 [ 38.967367] kasan_save_free_info+0x2b/0x50 [ 38.967900] __kasan_slab_free+0x10a/0x190 [ 38.968434] kmem_cache_free+0x10d/0x4d0 [ 38.968948] rcu_core+0x8c8/0x2860 [ 38.969393] __do_softirq+0x1b7/0x7d4 [ 38.969874] [ 38.970092] Last potentially related work creation: [ 38.970702] kasan_save_stack+0x22/0x50 [ 38.971209] __kasan_record_aux_stack+0x8e/0xa0 [ 38.971785] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.972507] remove_vma+0x139/0x170 [ 38.972957] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.973519] do_vmi_munmap+0x1f1/0x2b0 [ 38.974014] __vm_munmap+0x138/0x3a0 [ 38.974487] __x64_sys_munmap+0x59/0x80 [ 38.975010] do_syscall_64+0x3f/0x90 [ 38.975488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.976141] [ 38.976358] The buggy address belongs to the object at ffff8880183c3ae0 [ 38.976358] which belongs to the cache vm_area_struct of size 168 [ 38.977854] The buggy address is located 88 bytes inside of [ 38.977854] freed 168-byte region [ffff8880183c3ae0, ffff8880183c3b88) [ 38.979299] [ 38.979518] The buggy address belongs to the physical page: [ 38.980183] page:000000004e63e2c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183c3 [ 38.981292] memcg:ffff88800e4cec01 [ 38.981726] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.982375] page_type: 0xffffffff() [ 38.982842] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b5940 dead000000000004 [ 38.983779] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4cec01 [ 38.984708] page dumped because: kasan: bad access detected [ 38.985375] [ 38.985595] Memory state around the buggy address: [ 38.986174] ffff8880183c3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.987081] ffff8880183c3a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.987940] >ffff8880183c3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.988823] ^ [ 38.989446] ffff8880183c3b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.990305] ffff8880183c3c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.991182] ================================================================== [ 38.992100] Disabling lock debugging due to kernel taint [ 41.940074] BUG: Bad rss-counter state mm:000000004f1f192b type:MM_FILEPAGES val:33 [ 41.941285] BUG: Bad rss-counter state mm:000000004f1f192b type:MM_ANONPAGES val:22 [ 42.381596] BUG: Bad rss-counter state mm:000000002c3ad7b0 type:MM_FILEPAGES val:33 [ 42.382665] BUG: Bad rss-counter state mm:000000002c3ad7b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23419' (ECDSA) to the list of known hosts. 2023/06/20 12:32:38 fuzzer started 2023/06/20 12:32:38 dialing manager at localhost:36067 2023/06/20 12:32:38 checking machine... 2023/06/20 12:32:38 checking revisions... [ 43.175098] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:32:39 testing simple program... [ 43.214978] cgroup: Unknown subsys name 'net' [ 43.258058] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:32:38 Registers: info registers vcpu 0 RAX=0000000000000058 RBX=ffff88800e28c8c8 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000000 RBP=ffffffff8366b8df RSP=ffff8880147c78f8 R8 =0000000000000140 R9 =0000000000000000 R10=ffffed1001c51918 R11=00000000000b6a61 R12=ffff88800e28c8c0 R13=ffff888008fae000 R14=ffffffff8366b8df R15=ffff88800ef7e580 RIP=ffffffff8180c700 RFL=00000216 [----AP-] 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 00007f46e9695900 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=00007f46e8aadf70 CR3=000000000f27c000 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=834fa014a3517997c549ca2a659c1846 XMM02=eff9b2d0a8fce9cb000000000011b750 XMM03=2c67c8bc2e329bc3000000000011b878 XMM04=e190f0c6383a53d700000000000ae988 XMM05=65256f45b26642480000000000132830 XMM06=19e9129bd510f2350000000000131628 XMM07=fb795ef6d65770560000000000121a80 XMM08=2c67c8bc2e329bc3000000000011b878 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8180c6a1 RDX=dffffc0000000000 RSI=ffffffff8180c6a2 RDI=ffff8880145ff5e8 RBP=ffff8880145ff640 RSP=ffff8880145ff578 R8 =ffffffff860d825a R9 =ffff8880145ff628 R10=0000000000038001 R11=0000000000010b8d R12=ffff8880145ff648 R13=ffff8880145ff630 R14=ffff8880145ff629 R15=ffff8880145ff5e8 RIP=ffffffff8113071f RFL=00000282 [--S----] 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 00007fe103eb9900 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=00007fff2d510000 CR3=000000000c7fe000 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