syzkaller login: [ 38.756952] BUG: Bad rss-counter state mm:000000004c79d221 type:MM_FILEPAGES val:33 [ 38.758347] BUG: Bad rss-counter state mm:000000004c79d221 type:MM_ANONPAGES val:22 [ 38.925031] ================================================================== [ 38.926058] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.927132] Read of size 8 at addr ffff888017cd95c8 by task sshd/220 [ 38.928203] [ 38.928446] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.929386] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.930463] Call Trace: [ 38.930811] [ 38.931154] dump_stack_lvl+0x91/0xf0 [ 38.931698] print_report+0xcc/0x620 [ 38.932239] ? __virt_addr_valid+0x102/0x340 [ 38.932839] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.933528] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.934200] kasan_report+0xbe/0xf0 [ 38.934740] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.935452] vma_interval_tree_remove+0xc75/0xec0 [ 38.936131] vma_prepare+0xc54/0x11a0 [ 38.936680] __split_vma+0x5af/0x950 [ 38.937208] ? __pfx___split_vma+0x10/0x10 [ 38.937811] ? find_held_lock+0x2c/0x110 [ 38.938388] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.939042] ? lock_is_held_type+0x9f/0x120 [ 38.939655] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.940333] ? mtree_range_walk+0x632/0x900 [ 38.940959] ? mas_walk+0x5c7/0x7c0 [ 38.941497] do_vmi_munmap+0x1f1/0x2b0 [ 38.942050] mmap_region+0x1f9/0x2660 [ 38.942599] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.943180] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.943991] ? __pfx_lock_acquire+0x10/0x10 [ 38.944589] ? __pfx_mmap_region+0x10/0x10 [ 38.945186] ? security_mmap_addr+0x7d/0xa0 [ 38.945769] ? get_unmapped_area+0x1f5/0x3f0 [ 38.946369] do_mmap+0x854/0xf00 [ 38.946845] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.947392] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.948006] ksys_mmap_pgoff+0x3af/0x500 [ 38.948560] do_syscall_64+0x3f/0x90 [ 38.949079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949783] RIP: 0033:0x7f881a35ed82 [ 38.950272] 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 [ 38.952582] RSP: 002b:00007ffdc88ef9e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.953560] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f881a35ed82 [ 38.954474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8819798000 [ 38.955393] RBP: 00007f8819798000 R08: 0000000000000009 R09: 0000000000001000 [ 38.956302] R10: 0000000000000812 R11: 0000000000000206 R12: 00005638836dcec0 [ 38.957214] R13: 00007ffdc88efa00 R14: 00007ffdc88efa30 R15: 00007ffdc88efd90 [ 38.958141] [ 38.958455] [ 38.958691] Allocated by task 213: [ 38.959168] kasan_save_stack+0x22/0x50 [ 38.959724] kasan_set_track+0x25/0x30 [ 38.960255] __kasan_slab_alloc+0x59/0x70 [ 38.960827] kmem_cache_alloc+0x16b/0x370 [ 38.961389] vm_area_dup+0x20/0x160 [ 38.961890] __split_vma+0x170/0x950 [ 38.962390] split_vma+0xc6/0x110 [ 38.962867] mprotect_fixup+0x8d2/0xb30 [ 38.963419] do_mprotect_pkey+0x87e/0xd40 [ 38.963990] __x64_sys_mprotect+0x78/0xc0 [ 38.964557] do_syscall_64+0x3f/0x90 [ 38.965073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.965774] [ 38.966010] Freed by task 213: [ 38.966446] kasan_save_stack+0x22/0x50 [ 38.967016] kasan_set_track+0x25/0x30 [ 38.967576] kasan_save_free_info+0x2b/0x50 [ 38.968181] __kasan_slab_free+0x10a/0x190 [ 38.968774] kmem_cache_free+0x10d/0x4d0 [ 38.969416] rcu_core+0x8c8/0x2860 [ 38.969918] __do_softirq+0x1b7/0x7d4 [ 38.970453] [ 38.970693] Last potentially related work creation: [ 38.971360] kasan_save_stack+0x22/0x50 [ 38.971936] __kasan_record_aux_stack+0x8e/0xa0 [ 38.972574] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.973286] remove_vma+0x139/0x170 [ 38.973797] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.974434] do_vmi_munmap+0x1f1/0x2b0 [ 38.974979] __vm_munmap+0x138/0x3a0 [ 38.975498] __x64_sys_munmap+0x59/0x80 [ 38.976051] do_syscall_64+0x3f/0x90 [ 38.976588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.977298] [ 38.977539] The buggy address belongs to the object at ffff888017cd9570 [ 38.977539] which belongs to the cache vm_area_struct of size 168 [ 38.979186] The buggy address is located 88 bytes inside of [ 38.979186] freed 168-byte region [ffff888017cd9570, ffff888017cd9618) [ 38.980748] [ 38.980989] The buggy address belongs to the physical page: [ 38.981722] page:00000000db43009c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17cd9 [ 38.982946] memcg:ffff88800ffed901 [ 38.983423] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.984209] page_type: 0xffffffff() [ 38.984716] raw: 0100000000000200 ffff8880087a0c80 ffffea00005f4880 dead000000000003 [ 38.985742] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ffed901 [ 38.986746] page dumped because: kasan: bad access detected [ 38.987487] [ 38.987728] Memory state around the buggy address: [ 38.988376] ffff888017cd9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.989323] ffff888017cd9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.990266] >ffff888017cd9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.991221] ^ [ 38.991949] ffff888017cd9600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.992890] ffff888017cd9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.993825] ================================================================== [ 38.994899] Disabling lock debugging due to kernel taint [ 41.602372] BUG: Bad rss-counter state mm:0000000040c42465 type:MM_FILEPAGES val:33 [ 41.603150] BUG: Bad rss-counter state mm:0000000040c42465 type:MM_ANONPAGES val:22 [ 42.045832] BUG: Bad rss-counter state mm:000000004a21fce4 type:MM_FILEPAGES val:33 [ 42.046912] BUG: Bad rss-counter state mm:000000004a21fce4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31094' (ECDSA) to the list of known hosts. 2023/06/20 17:33:18 fuzzer started 2023/06/20 17:33:19 dialing manager at localhost:36067 2023/06/20 17:33:19 checking machine... 2023/06/20 17:33:19 checking revisions... [ 42.754317] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:33:19 testing simple program... [ 42.809210] cgroup: Unknown subsys name 'net' [ 42.914309] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:33:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c08 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88801a1e67a0 RIP=ffffffff84511dc0 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 0000000000000000 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=00007ffffc0192c8 CR3=000000000eb84000 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=2038313a33333a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a33333a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffffffffffff RCX=ffffffff813ba245 RDX=ffff888019c13680 RSI=0000000000000100 RDI=0000000000000007 RBP=ffff88806cf09eb8 RSP=ffff88806cf09e58 R8 =0000000000000007 R9 =0000000000000000 R10=ffffffffffffffff R11=0000000000000001 R12=ffff88806cf293c0 R13=dffffc0000000000 R14=fffffbfff0a81e40 R15=1ffff1100d9e5282 RIP=ffffffff814c0272 RFL=00000006 [-----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 00007f89e110c900 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=00007f89e10eb020 CR3=000000000e28c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000