syzkaller login: [ 31.008367] BUG: Bad rss-counter state mm:00000000895329ff type:MM_FILEPAGES val:33 [ 31.009308] BUG: Bad rss-counter state mm:00000000895329ff type:MM_ANONPAGES val:22 [ 31.140727] ================================================================== [ 31.141303] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.141886] Read of size 8 at addr ffff88800f9584e0 by task sshd/221 [ 31.142354] [ 31.142486] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.143025] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.143617] Call Trace: [ 31.143811] [ 31.143994] dump_stack_lvl+0x91/0xf0 [ 31.144297] print_report+0xcc/0x620 [ 31.144606] ? __virt_addr_valid+0x102/0x340 [ 31.144944] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145314] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145690] kasan_report+0xbe/0xf0 [ 31.145973] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.146329] vma_interval_tree_remove+0xc75/0xec0 [ 31.146687] vma_prepare+0xc54/0x11a0 [ 31.149939] __split_vma+0x5af/0x950 [ 31.150252] ? __pfx___split_vma+0x10/0x10 [ 31.150571] ? find_held_lock+0x2c/0x110 [ 31.150896] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.151259] ? lock_is_held_type+0x9f/0x120 [ 31.151591] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.152008] ? mtree_range_walk+0x632/0x900 [ 31.152356] ? mas_walk+0x5c7/0x7c0 [ 31.152666] do_vmi_munmap+0x1f1/0x2b0 [ 31.152992] mmap_region+0x1f9/0x2660 [ 31.153291] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.153610] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.154051] ? __pfx_lock_acquire+0x10/0x10 [ 31.154387] ? __pfx_mmap_region+0x10/0x10 [ 31.154722] ? security_mmap_addr+0x7d/0xa0 [ 31.163115] ? get_unmapped_area+0x1f5/0x3f0 [ 31.163473] do_mmap+0x854/0xf00 [ 31.163760] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.164091] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.164457] ksys_mmap_pgoff+0x3af/0x500 [ 31.164791] do_syscall_64+0x3f/0x90 [ 31.165103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.165521] RIP: 0033:0x7f4327672d82 [ 31.165817] 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 [ 31.167182] RSP: 002b:00007ffdb4f29ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.167710] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4327672d82 [ 31.168261] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4326aac000 [ 31.168811] RBP: 00007f4326aac000 R08: 0000000000000009 R09: 0000000000001000 [ 31.169329] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d454b3f60 [ 31.169845] R13: 00007ffdb4f29f10 R14: 00007ffdb4f29f40 R15: 00007ffdb4f2a2a0 [ 31.170382] [ 31.170560] [ 31.170688] Allocated by task 214: [ 31.170947] kasan_save_stack+0x22/0x50 [ 31.171290] kasan_set_track+0x25/0x30 [ 31.171611] __kasan_slab_alloc+0x59/0x70 [ 31.171955] kmem_cache_alloc+0x16b/0x370 [ 31.172289] vm_area_dup+0x20/0x160 [ 31.172584] __split_vma+0x170/0x950 [ 31.172919] split_vma+0xc6/0x110 [ 31.173199] mprotect_fixup+0x8d2/0xb30 [ 31.173522] do_mprotect_pkey+0x87e/0xd40 [ 31.173851] __x64_sys_mprotect+0x78/0xc0 [ 31.174180] do_syscall_64+0x3f/0x90 [ 31.174471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.174879] [ 31.175032] Freed by task 0: [ 31.175265] kasan_save_stack+0x22/0x50 [ 31.175571] kasan_set_track+0x25/0x30 [ 31.175922] kasan_save_free_info+0x2b/0x50 [ 31.176257] __kasan_slab_free+0x10a/0x190 [ 31.176587] kmem_cache_free+0x10d/0x4d0 [ 31.176916] rcu_core+0x8c8/0x2860 [ 31.177185] __do_softirq+0x1b7/0x7d4 [ 31.177482] [ 31.177612] Last potentially related work creation: [ 31.177969] kasan_save_stack+0x22/0x50 [ 31.178269] __kasan_record_aux_stack+0x8e/0xa0 [ 31.178609] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.179028] remove_vma+0x139/0x170 [ 31.179322] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.179681] do_vmi_munmap+0x1f1/0x2b0 [ 31.179998] __vm_munmap+0x138/0x3a0 [ 31.180300] __x64_sys_munmap+0x59/0x80 [ 31.180622] do_syscall_64+0x3f/0x90 [ 31.180962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.181357] [ 31.181487] The buggy address belongs to the object at ffff88800f958488 [ 31.181487] which belongs to the cache vm_area_struct of size 168 [ 31.182393] The buggy address is located 88 bytes inside of [ 31.182393] freed 168-byte region [ffff88800f958488, ffff88800f958530) [ 31.183277] [ 31.183411] The buggy address belongs to the physical page: [ 31.183826] page:0000000067312d22 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800f9580e8 pfn:0xf958 [ 31.184614] memcg:ffff88800ee2cf01 [ 31.184910] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.185313] page_type: 0xffffffff() [ 31.185592] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b8a10 ffffea000035fe50 [ 31.186164] raw: ffff88800f9580e8 000000000011000e 00000001ffffffff ffff88800ee2cf01 [ 31.186725] page dumped because: kasan: bad access detected [ 31.187219] [ 31.187361] Memory state around the buggy address: [ 31.187735] ffff88800f958380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.188288] ffff88800f958400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.188822] >ffff88800f958480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.189343] ^ [ 31.189819] ffff88800f958500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.190354] ffff88800f958580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.190908] ================================================================== [ 31.192013] Disabling lock debugging due to kernel taint [ 33.955697] BUG: Bad rss-counter state mm:00000000600bca10 type:MM_FILEPAGES val:33 [ 33.956514] BUG: Bad rss-counter state mm:00000000600bca10 type:MM_ANONPAGES val:22 [ 35.058924] BUG: Bad rss-counter state mm:0000000097f7d380 type:MM_FILEPAGES val:33 [ 35.059648] BUG: Bad rss-counter state mm:0000000097f7d380 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32884' (ECDSA) to the list of known hosts. 2023/06/21 10:02:24 fuzzer started 2023/06/21 10:02:24 dialing manager at localhost:36067 2023/06/21 10:02:24 checking machine... 2023/06/21 10:02:24 checking revisions... [ 36.083200] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:02:24 testing simple program... [ 36.140422] cgroup: Unknown subsys name 'net' [ 36.226850] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:02:24 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc4655be98 CR3=000000000e534000 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=2033323a32303a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a32303a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800ea71390 RCX=ffff88800844f780 RDX=ffffea00003a9c40 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff88800cac7c28 R8 =ffff88800ea715f0 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=dffffc0000000000 R13=ffff88800cac7c68 R14=ffff88800844f780 R15=ffff8880161df850 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007fc7dd471900 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=00007f071b419328 CR3=00000000161b2000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000