syzkaller login: [ 30.674734] BUG: Bad rss-counter state mm:00000000e975b71e type:MM_FILEPAGES val:33 [ 30.676468] BUG: Bad rss-counter state mm:00000000e975b71e type:MM_ANONPAGES val:22 [ 30.854751] ================================================================== [ 30.855858] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.857120] Read of size 8 at addr ffff888010301c20 by task sshd/221 [ 30.858010] [ 30.858252] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.859228] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.860303] Call Trace: [ 30.860655] [ 30.860968] dump_stack_lvl+0x91/0xf0 [ 30.861509] print_report+0xcc/0x620 [ 30.862053] ? __virt_addr_valid+0x102/0x340 [ 30.862658] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863347] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864032] kasan_report+0xbe/0xf0 [ 30.864555] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865240] vma_interval_tree_remove+0xc75/0xec0 [ 30.865929] vma_prepare+0xc54/0x11a0 [ 30.866462] __split_vma+0x5af/0x950 [ 30.866986] ? __pfx___split_vma+0x10/0x10 [ 30.867570] ? find_held_lock+0x2c/0x110 [ 30.868147] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.868778] ? lock_is_held_type+0x9f/0x120 [ 30.869382] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.870064] ? mtree_range_walk+0x632/0x900 [ 30.870674] ? mas_walk+0x5c7/0x7c0 [ 30.871198] do_vmi_munmap+0x1f1/0x2b0 [ 30.871741] mmap_region+0x1f9/0x2660 [ 30.872277] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.872846] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.873646] ? __pfx_lock_acquire+0x10/0x10 [ 30.874250] ? __pfx_mmap_region+0x10/0x10 [ 30.874840] ? security_mmap_addr+0x7d/0xa0 [ 30.875434] ? get_unmapped_area+0x1f5/0x3f0 [ 30.876041] do_mmap+0x854/0xf00 [ 30.876523] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.877069] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.877694] ksys_mmap_pgoff+0x3af/0x500 [ 30.878288] do_syscall_64+0x3f/0x90 [ 30.878826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.879547] RIP: 0033:0x7fc8f4adad82 [ 30.880056] 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 [ 30.882445] RSP: 002b:00007fff24be4428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.883447] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8f4adad82 [ 30.884388] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8f3f14000 [ 30.885324] RBP: 00007fc8f3f14000 R08: 0000000000000009 R09: 0000000000001000 [ 30.886283] R10: 0000000000000812 R11: 0000000000000206 R12: 000056495889cec0 [ 30.887203] R13: 00007fff24be4440 R14: 00007fff24be4470 R15: 00007fff24be47d0 [ 30.888120] [ 30.888432] [ 30.888662] Allocated by task 214: [ 30.889117] kasan_save_stack+0x22/0x50 [ 30.889653] kasan_set_track+0x25/0x30 [ 30.890204] __kasan_slab_alloc+0x59/0x70 [ 30.890776] kmem_cache_alloc+0x16b/0x370 [ 30.891323] vm_area_dup+0x20/0x160 [ 30.891813] __split_vma+0x170/0x950 [ 30.892318] split_vma+0xc6/0x110 [ 30.892787] mprotect_fixup+0x8d2/0xb30 [ 30.893322] do_mprotect_pkey+0x87e/0xd40 [ 30.893872] __x64_sys_mprotect+0x78/0xc0 [ 30.894436] do_syscall_64+0x3f/0x90 [ 30.894952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895646] [ 30.895876] Freed by task 214: [ 30.896294] kasan_save_stack+0x22/0x50 [ 30.896848] kasan_set_track+0x25/0x30 [ 30.897398] kasan_save_free_info+0x2b/0x50 [ 30.898003] __kasan_slab_free+0x10a/0x190 [ 30.898603] kmem_cache_free+0x10d/0x4d0 [ 30.899167] rcu_core+0x8c8/0x2860 [ 30.899662] __do_softirq+0x1b7/0x7d4 [ 30.900199] [ 30.900436] Last potentially related work creation: [ 30.901085] kasan_save_stack+0x22/0x50 [ 30.901646] __kasan_record_aux_stack+0x8e/0xa0 [ 30.902299] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.903006] remove_vma+0x139/0x170 [ 30.903514] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.904134] do_vmi_munmap+0x1f1/0x2b0 [ 30.904671] __vm_munmap+0x138/0x3a0 [ 30.905189] __x64_sys_munmap+0x59/0x80 [ 30.905741] do_syscall_64+0x3f/0x90 [ 30.906275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.906994] [ 30.907233] The buggy address belongs to the object at ffff888010301bc8 [ 30.907233] which belongs to the cache vm_area_struct of size 168 [ 30.908864] The buggy address is located 88 bytes inside of [ 30.908864] freed 168-byte region [ffff888010301bc8, ffff888010301c70) [ 30.910438] [ 30.910674] The buggy address belongs to the physical page: [ 30.911409] page:00000000ebcbdc28 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10301 [ 30.912620] memcg:ffff88800fc39d01 [ 30.913093] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.913807] page_type: 0xffffffff() [ 30.914320] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.915343] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc39d01 [ 30.916352] page dumped because: kasan: bad access detected [ 30.917081] [ 30.917320] Memory state around the buggy address: [ 30.917974] ffff888010301b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.918924] ffff888010301b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.919871] >ffff888010301c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.920824] ^ [ 30.921407] ffff888010301c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.922384] ffff888010301d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.923329] ================================================================== [ 30.924511] Disabling lock debugging due to kernel taint [ 32.611295] BUG: Bad rss-counter state mm:00000000c68a5dad type:MM_FILEPAGES val:33 [ 32.612320] BUG: Bad rss-counter state mm:00000000c68a5dad type:MM_ANONPAGES val:22 [ 33.062977] BUG: Bad rss-counter state mm:000000006a39f901 type:MM_FILEPAGES val:33 [ 33.063969] BUG: Bad rss-counter state mm:000000006a39f901 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51060' (ECDSA) to the list of known hosts. 2023/06/21 03:42:00 fuzzer started 2023/06/21 03:42:00 dialing manager at localhost:36067 2023/06/21 03:42:00 checking machine... 2023/06/21 03:42:00 checking revisions... [ 33.783609] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:42:01 testing simple program... [ 33.833016] cgroup: Unknown subsys name 'net' [ 33.881991] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:42:00 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff863de424 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff863de428 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000091bda R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888014757ce0 R15=ffff88806ce09a98 RIP=ffffffff81130bc6 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 00007ff319874900 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=00007ffe64d27000 CR3=000000000c99a000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ff99e906fb0 CR3=000000000d9ac000 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=ceb48393d251719490490f2fb1e5bdcc XMM02=2c67c8bc2e329bc3000000000011a100 XMM03=fb795ef6d657705600000000001219a8 XMM04=cd0b0417cd157b6100000000000ae988 XMM05=e4cb8bb95a7664b60000000000131870 XMM06=c291bd5c70af25b900000000001316f8 XMM07=e042d86d42eb936e0000000000121c28 XMM08=e1ce82a84479404f000000000011a160 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000