syzkaller login: [ 30.539506] BUG: Bad rss-counter state mm:000000002126e066 type:MM_FILEPAGES val:33 [ 30.540528] BUG: Bad rss-counter state mm:000000002126e066 type:MM_ANONPAGES val:22 [ 30.701260] ================================================================== [ 30.702221] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.703211] Read of size 8 at addr ffff88800caa3df0 by task sshd/220 [ 30.704011] [ 30.704345] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.705248] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.706283] Call Trace: [ 30.706631] [ 30.706946] dump_stack_lvl+0x91/0xf0 [ 30.707459] print_report+0xcc/0x620 [ 30.707971] ? __virt_addr_valid+0x102/0x340 [ 30.708544] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.709210] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.709876] kasan_report+0xbe/0xf0 [ 30.710391] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.711046] vma_interval_tree_remove+0xc75/0xec0 [ 30.711661] vma_prepare+0xc54/0x11a0 [ 30.712156] __split_vma+0x5af/0x950 [ 30.712656] ? __pfx___split_vma+0x10/0x10 [ 30.713225] ? find_held_lock+0x2c/0x110 [ 30.713796] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.714390] ? lock_is_held_type+0x9f/0x120 [ 30.714969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.715587] ? mtree_range_walk+0x632/0x900 [ 30.716161] ? mas_walk+0x5c7/0x7c0 [ 30.716666] do_vmi_munmap+0x1f1/0x2b0 [ 30.717189] mmap_region+0x1f9/0x2660 [ 30.717707] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.718261] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.719007] ? __pfx_lock_acquire+0x10/0x10 [ 30.719548] ? __pfx_mmap_region+0x10/0x10 [ 30.720123] ? security_mmap_addr+0x7d/0xa0 [ 30.720683] ? get_unmapped_area+0x1f5/0x3f0 [ 30.721244] do_mmap+0x854/0xf00 [ 30.721688] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.722225] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.722827] ksys_mmap_pgoff+0x3af/0x500 [ 30.723340] do_syscall_64+0x3f/0x90 [ 30.723878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.724528] RIP: 0033:0x7f899d7e6d82 [ 30.725033] 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 [ 30.727236] RSP: 002b:00007ffc15f0ac98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.728196] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f899d7e6d82 [ 30.729100] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f899cc20000 [ 30.729992] RBP: 00007f899cc20000 R08: 0000000000000009 R09: 0000000000001000 [ 30.730872] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2f246ed90 [ 30.731731] R13: 00007ffc15f0acb0 R14: 00007ffc15f0ace0 R15: 00007ffc15f0b040 [ 30.732626] [ 30.732952] [ 30.733172] Allocated by task 213: [ 30.733596] kasan_save_stack+0x22/0x50 [ 30.734139] kasan_set_track+0x25/0x30 [ 30.734659] __kasan_slab_alloc+0x59/0x70 [ 30.735215] kmem_cache_alloc+0x16b/0x370 [ 30.735758] vm_area_dup+0x20/0x160 [ 30.736235] __split_vma+0x170/0x950 [ 30.736716] split_vma+0xc6/0x110 [ 30.737174] mprotect_fixup+0x8d2/0xb30 [ 30.737691] do_mprotect_pkey+0x87e/0xd40 [ 30.738267] __x64_sys_mprotect+0x78/0xc0 [ 30.738826] do_syscall_64+0x3f/0x90 [ 30.739317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.740001] [ 30.740225] Freed by task 213: [ 30.740633] kasan_save_stack+0x22/0x50 [ 30.741159] kasan_set_track+0x25/0x30 [ 30.741667] kasan_save_free_info+0x2b/0x50 [ 30.742231] __kasan_slab_free+0x10a/0x190 [ 30.742795] kmem_cache_free+0x10d/0x4d0 [ 30.743317] rcu_core+0x8c8/0x2860 [ 30.743792] __do_softirq+0x1b7/0x7d4 [ 30.744307] [ 30.744525] Last potentially related work creation: [ 30.745133] kasan_save_stack+0x22/0x50 [ 30.745703] __kasan_record_aux_stack+0x8e/0xa0 [ 30.746312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.746980] remove_vma+0x139/0x170 [ 30.747436] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.748036] do_vmi_munmap+0x1f1/0x2b0 [ 30.748529] __vm_munmap+0x138/0x3a0 [ 30.749017] __x64_sys_munmap+0x59/0x80 [ 30.749515] do_syscall_64+0x3f/0x90 [ 30.750025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.750676] [ 30.750919] The buggy address belongs to the object at ffff88800caa3d98 [ 30.750919] which belongs to the cache vm_area_struct of size 168 [ 30.752673] The buggy address is located 88 bytes inside of [ 30.752673] freed 168-byte region [ffff88800caa3d98, ffff88800caa3e40) [ 30.754173] [ 30.754395] The buggy address belongs to the physical page: [ 30.755103] page:000000002308c56d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcaa3 [ 30.756255] memcg:ffff8880181bb101 [ 30.756686] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.757394] page_type: 0xffffffff() [ 30.757872] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c7e00 dead000000000005 [ 30.758839] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880181bb101 [ 30.759766] page dumped because: kasan: bad access detected [ 30.760445] [ 30.760699] Memory state around the buggy address: [ 30.761300] ffff88800caa3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.762193] ffff88800caa3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.763070] >ffff88800caa3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.763971] ^ [ 30.764813] ffff88800caa3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.765669] ffff88800caa3e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.766566] ================================================================== [ 30.767531] Disabling lock debugging due to kernel taint [ 33.659394] BUG: Bad rss-counter state mm:00000000b862c2fc type:MM_FILEPAGES val:33 [ 33.660637] BUG: Bad rss-counter state mm:00000000b862c2fc type:MM_ANONPAGES val:22 [ 34.120069] BUG: Bad rss-counter state mm:00000000a4048452 type:MM_FILEPAGES val:33 [ 34.121132] BUG: Bad rss-counter state mm:00000000a4048452 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62092' (ECDSA) to the list of known hosts. 2023/06/20 13:32:10 fuzzer started 2023/06/20 13:32:10 dialing manager at localhost:36067 2023/06/20 13:32:11 checking machine... 2023/06/20 13:32:11 checking revisions... [ 34.860554] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:32:11 testing simple program... [ 34.921694] cgroup: Unknown subsys name 'net' [ 34.971960] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:32:10 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffff888019a5f130 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888019a5f134 RBP=1ffff110011b3f83 RSP=ffff888008d9fc10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000202 R13=ffff888019a5f170 R14=ffffffff818d9c06 R15=ffff88800db8d000 RIP=ffffffff812e009a RFL=00000046 [---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=00007f8f39a41650 CR3=000000000f386000 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=32333a3331203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363032 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff88806cf3a2c0 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff813781ac RBP=0000000000000200 RSP=ffff888008e37d40 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff88806cf35000 R13=ffff888008e37dc8 R14=000000000000000b R15=ffff88806cf3a360 RIP=ffffffff845118ab RFL=00000046 [---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=00007f3003cd8000 CR3=000000000c9b0000 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=151661699d533dba2d4e4424d2f31af8 XMM02=2c67c8bc2e329bc30000000000119ff8 XMM03=fb795ef6d65770560000000000121940 XMM04=4c769dc3da00a61f00000000000ae988 XMM05=19e9129bd510f2350000000000131830 XMM06=4fda316b135da52b00000000001316b8 XMM07=e042d86d42eb936e0000000000121bc0 XMM08=35a3d72a8d18599a000000000011a058 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000