syzkaller login: [ 23.775270] BUG: Bad rss-counter state mm:000000001a1aeb74 type:MM_FILEPAGES val:33 [ 23.776469] BUG: Bad rss-counter state mm:000000001a1aeb74 type:MM_ANONPAGES val:22 [ 23.856021] ================================================================== [ 23.856940] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.857900] Read of size 8 at addr ffff88800961f228 by task sshd/219 [ 23.858675] [ 23.858898] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.859896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.860885] Call Trace: [ 23.861252] [ 23.861547] dump_stack_lvl+0x91/0xf0 [ 23.862066] print_report+0xcc/0x620 [ 23.862571] ? __virt_addr_valid+0x102/0x340 [ 23.863130] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.863751] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.864393] kasan_report+0xbe/0xf0 [ 23.864877] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.865525] vma_interval_tree_remove+0xc75/0xec0 [ 23.866132] vma_prepare+0xc54/0x11a0 [ 23.866611] __split_vma+0x5af/0x950 [ 23.867083] ? __pfx___split_vma+0x10/0x10 [ 23.867611] ? find_held_lock+0x2c/0x110 [ 23.868131] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.868694] ? lock_is_held_type+0x9f/0x120 [ 23.869270] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.869879] ? mtree_range_walk+0x632/0x900 [ 23.870444] ? mas_walk+0x5c7/0x7c0 [ 23.870930] do_vmi_munmap+0x1f1/0x2b0 [ 23.871430] mmap_region+0x1f9/0x2660 [ 23.871912] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.872433] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.873160] ? __pfx_lock_acquire+0x10/0x10 [ 23.873698] ? __pfx_mmap_region+0x10/0x10 [ 23.874228] ? security_mmap_addr+0x7d/0xa0 [ 23.874759] ? get_unmapped_area+0x1f5/0x3f0 [ 23.875309] do_mmap+0x854/0xf00 [ 23.875755] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.876250] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.876819] ksys_mmap_pgoff+0x3af/0x500 [ 23.877339] do_syscall_64+0x3f/0x90 [ 23.877829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.878485] RIP: 0033:0x7fd6735fad82 [ 23.878945] 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 [ 23.881087] RSP: 002b:00007fffa81b4348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.881987] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd6735fad82 [ 23.882836] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd672a34000 [ 23.883690] RBP: 00007fd672a34000 R08: 0000000000000009 R09: 0000000000001000 [ 23.884532] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9e6f8bec0 [ 23.885386] R13: 00007fffa81b4360 R14: 00007fffa81b4390 R15: 00007fffa81b46f0 [ 23.886250] [ 23.886550] [ 23.886763] Allocated by task 212: [ 23.887192] kasan_save_stack+0x22/0x50 [ 23.887700] kasan_set_track+0x25/0x30 [ 23.888198] __kasan_slab_alloc+0x59/0x70 [ 23.888724] kmem_cache_alloc+0x16b/0x370 [ 23.889260] vm_area_dup+0x20/0x160 [ 23.889715] __split_vma+0x170/0x950 [ 23.890181] split_vma+0xc6/0x110 [ 23.890625] mprotect_fixup+0x8d2/0xb30 [ 23.891133] do_mprotect_pkey+0x87e/0xd40 [ 23.891665] __x64_sys_mprotect+0x78/0xc0 [ 23.892195] do_syscall_64+0x3f/0x90 [ 23.892676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.893324] [ 23.893542] Freed by task 212: [ 23.893936] kasan_save_stack+0x22/0x50 [ 23.894438] kasan_set_track+0x25/0x30 [ 23.894934] kasan_save_free_info+0x2b/0x50 [ 23.895465] __kasan_slab_free+0x10a/0x190 [ 23.895999] kmem_cache_free+0x10d/0x4d0 [ 23.896519] rcu_core+0x8c8/0x2860 [ 23.896971] __do_softirq+0x1b7/0x7d4 [ 23.897468] [ 23.897690] Last potentially related work creation: [ 23.898284] kasan_save_stack+0x22/0x50 [ 23.898793] __kasan_record_aux_stack+0x8e/0xa0 [ 23.899367] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.900018] remove_vma+0x139/0x170 [ 23.900480] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.901040] do_vmi_munmap+0x1f1/0x2b0 [ 23.901531] __vm_munmap+0x138/0x3a0 [ 23.902001] __x64_sys_munmap+0x59/0x80 [ 23.902506] do_syscall_64+0x3f/0x90 [ 23.902982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.903624] [ 23.903836] The buggy address belongs to the object at ffff88800961f1d0 [ 23.903836] which belongs to the cache vm_area_struct of size 168 [ 23.905313] The buggy address is located 88 bytes inside of [ 23.905313] freed 168-byte region [ffff88800961f1d0, ffff88800961f278) [ 23.906720] [ 23.906934] The buggy address belongs to the physical page: [ 23.907590] page:000000003b1a99a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x961f [ 23.908669] memcg:ffff88800e15b101 [ 23.909114] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.909755] page_type: 0xffffffff() [ 23.910205] raw: 0100000000000200 ffff8880087a0c80 ffffea0000388540 dead000000000004 [ 23.911127] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e15b101 [ 23.912040] page dumped because: kasan: bad access detected [ 23.912705] [ 23.912922] Memory state around the buggy address: [ 23.913503] ffff88800961f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.914376] ffff88800961f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 23.915249] >ffff88800961f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 23.916104] ^ [ 23.916670] ffff88800961f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.917582] ffff88800961f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.918452] ================================================================== [ 23.919519] Disabling lock debugging due to kernel taint [ 25.646364] BUG: Bad rss-counter state mm:00000000e4175220 type:MM_FILEPAGES val:33 [ 25.647039] BUG: Bad rss-counter state mm:00000000e4175220 type:MM_ANONPAGES val:22 [ 26.203887] BUG: Bad rss-counter state mm:000000005e22e290 type:MM_FILEPAGES val:33 [ 26.205105] BUG: Bad rss-counter state mm:000000005e22e290 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36919' (ECDSA) to the list of known hosts. 2023/06/20 11:53:15 fuzzer started 2023/06/20 11:53:15 dialing manager at localhost:36067 2023/06/20 11:53:15 checking machine... 2023/06/20 11:53:15 checking revisions... [ 26.848664] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:53:15 testing simple program... [ 26.892551] cgroup: Unknown subsys name 'net' [ 26.956045] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:53:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b2558 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880146f7a98 RSP=ffff8880146f79d0 R8 =ffffffff863b255c R9 =ffff8880146f7a80 R10=0000000000038001 R11=000000000008a6b1 R12=ffff8880146f7aa0 R13=ffff8880146f7a88 R14=ffff8880146f7a81 R15=ffff8880146f7a40 RIP=ffffffff81130b06 RFL=00000297 [--S-APC] 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 00007f1ff3e3a900 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=00007ffdc2e2f000 CR3=000000001c902000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000002 RDX=1ffff1100d9e1355 RSI=ffff88806cf09df0 RDI=ffff88806cf09aa8 RBP=ffff88806cf09df0 RSP=ffff88806cf099f0 R8 =ffffffff86138eb4 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d9c R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09df8 R15=ffff88806cf09a98 RIP=ffffffff81130468 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 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=00007fa337cebcd0 CR3=000000000d5c8000 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=a768cd0b0eb7239d71444e03ca6443a2 XMM02=2c67c8bc2e329bc3000000000011d380 XMM03=fb795ef6d65770560000000000121028 XMM04=1962870a2c94004d00000000000ae988 XMM05=dfcdbad4f1609c370000000000130df8 XMM06=96e41a97c8de00a6000000000012f868 XMM07=e042d86d42eb936e0000000000121300 XMM08=48af00cb83db5b5d000000000011d3e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000