syzkaller login: [ 30.806615] BUG: Bad rss-counter state mm:00000000233d7707 type:MM_FILEPAGES val:33 [ 30.808066] BUG: Bad rss-counter state mm:00000000233d7707 type:MM_ANONPAGES val:22 [ 30.949813] ================================================================== [ 30.950932] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.952069] Read of size 8 at addr ffff88800c9a3880 by task sshd/220 [ 30.953156] [ 30.953414] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.954302] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.955317] Call Trace: [ 30.955644] [ 30.955942] dump_stack_lvl+0x91/0xf0 [ 30.956437] print_report+0xcc/0x620 [ 30.956929] ? __virt_addr_valid+0x102/0x340 [ 30.957510] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.958142] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.958769] kasan_report+0xbe/0xf0 [ 30.959247] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.959872] vma_interval_tree_remove+0xc75/0xec0 [ 30.960494] vma_prepare+0xc54/0x11a0 [ 30.960987] __split_vma+0x5af/0x950 [ 30.961487] ? __pfx___split_vma+0x10/0x10 [ 30.962028] ? find_held_lock+0x2c/0x110 [ 30.962559] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.963141] ? lock_is_held_type+0x9f/0x120 [ 30.963691] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.964311] ? mtree_range_walk+0x632/0x900 [ 30.964876] ? mas_walk+0x5c7/0x7c0 [ 30.965369] do_vmi_munmap+0x1f1/0x2b0 [ 30.965878] mmap_region+0x1f9/0x2660 [ 30.966369] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.966887] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.967611] ? __pfx_lock_acquire+0x10/0x10 [ 30.968166] ? __pfx_mmap_region+0x10/0x10 [ 30.968705] ? security_mmap_addr+0x7d/0xa0 [ 30.969254] ? get_unmapped_area+0x1f5/0x3f0 [ 30.969810] do_mmap+0x854/0xf00 [ 30.970258] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.970766] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.971339] ksys_mmap_pgoff+0x3af/0x500 [ 30.971856] do_syscall_64+0x3f/0x90 [ 30.972339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.972997] RIP: 0033:0x7f745c5ebd82 [ 30.973489] 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 [ 30.975651] RSP: 002b:00007ffe19841c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.976566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f745c5ebd82 [ 30.977458] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f745ba25000 [ 30.978311] RBP: 00007f745ba25000 R08: 0000000000000009 R09: 0000000000001000 [ 30.979161] R10: 0000000000000812 R11: 0000000000000206 R12: 000055729105bb20 [ 30.980017] R13: 00007ffe19841c60 R14: 00007ffe19841c90 R15: 00007ffe19841ff0 [ 30.980891] [ 30.981193] [ 30.981428] Allocated by task 213: [ 30.981860] kasan_save_stack+0x22/0x50 [ 30.982372] kasan_set_track+0x25/0x30 [ 30.982880] __kasan_slab_alloc+0x59/0x70 [ 30.983417] kmem_cache_alloc+0x16b/0x370 [ 30.983956] vm_area_dup+0x20/0x160 [ 30.984423] __split_vma+0x170/0x950 [ 30.984895] split_vma+0xc6/0x110 [ 30.985353] mprotect_fixup+0x8d2/0xb30 [ 30.985864] do_mprotect_pkey+0x87e/0xd40 [ 30.986397] __x64_sys_mprotect+0x78/0xc0 [ 30.986921] do_syscall_64+0x3f/0x90 [ 30.987412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.988066] [ 30.988280] Freed by task 213: [ 30.988683] kasan_save_stack+0x22/0x50 [ 30.989192] kasan_set_track+0x25/0x30 [ 30.989719] kasan_save_free_info+0x2b/0x50 [ 30.990278] __kasan_slab_free+0x10a/0x190 [ 30.990828] kmem_cache_free+0x10d/0x4d0 [ 30.991347] rcu_core+0x8c8/0x2860 [ 30.991800] __do_softirq+0x1b7/0x7d4 [ 30.992294] [ 30.992517] Last potentially related work creation: [ 30.993102] kasan_save_stack+0x22/0x50 [ 30.993613] __kasan_record_aux_stack+0x8e/0xa0 [ 30.994190] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.994842] remove_vma+0x139/0x170 [ 30.995305] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.995873] do_vmi_munmap+0x1f1/0x2b0 [ 30.996371] __vm_munmap+0x138/0x3a0 [ 30.996855] __x64_sys_munmap+0x59/0x80 [ 30.997367] do_syscall_64+0x3f/0x90 [ 30.997853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.998509] [ 30.998723] Second to last potentially related work creation: [ 30.999406] kasan_save_stack+0x22/0x50 [ 30.999912] __kasan_record_aux_stack+0x8e/0xa0 [ 31.000486] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.001143] remove_vma+0x139/0x170 [ 31.001618] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.002183] do_vmi_munmap+0x1f1/0x2b0 [ 31.002670] mmap_region+0x1f9/0x2660 [ 31.003156] do_mmap+0x854/0xf00 [ 31.003592] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.004083] ksys_mmap_pgoff+0x3af/0x500 [ 31.004606] do_syscall_64+0x3f/0x90 [ 31.005091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.005751] [ 31.005968] The buggy address belongs to the object at ffff88800c9a3828 [ 31.005968] which belongs to the cache vm_area_struct of size 168 [ 31.007462] The buggy address is located 88 bytes inside of [ 31.007462] freed 168-byte region [ffff88800c9a3828, ffff88800c9a38d0) [ 31.008900] [ 31.009118] The buggy address belongs to the physical page: [ 31.009791] page:000000000a8fd623 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9a3 [ 31.010881] memcg:ffff88800f85d101 [ 31.011319] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.012021] page_type: 0xffffffff() [ 31.012487] raw: 0100000000000200 ffff8880087a0c80 ffffea0000504140 dead000000000003 [ 31.013432] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f85d101 [ 31.014344] page dumped because: kasan: bad access detected [ 31.015004] [ 31.015219] Memory state around the buggy address: [ 31.015795] ffff88800c9a3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.016663] ffff88800c9a3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.017540] >ffff88800c9a3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.018401] ^ [ 31.018821] ffff88800c9a3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.019691] ffff88800c9a3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.020555] ================================================================== [ 31.021730] Disabling lock debugging due to kernel taint [ 33.372714] BUG: Bad rss-counter state mm:0000000017a27b9c type:MM_FILEPAGES val:33 [ 33.373947] BUG: Bad rss-counter state mm:0000000017a27b9c type:MM_ANONPAGES val:22 [ 33.912830] BUG: Bad rss-counter state mm:000000006d5a5247 type:MM_FILEPAGES val:33 [ 33.914203] BUG: Bad rss-counter state mm:000000006d5a5247 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35039' (ECDSA) to the list of known hosts. 2023/06/20 12:15:41 fuzzer started 2023/06/20 12:15:42 dialing manager at localhost:36067 2023/06/20 12:15:42 checking machine... 2023/06/20 12:15:42 checking revisions... [ 34.548687] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:15:42 testing simple program... [ 34.585218] cgroup: Unknown subsys name 'net' [ 34.639190] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:15:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000040 RDI=ffff888017dc7ab0 RBP=ffff8880087b2500 RSP=ffff888017dc7aa0 R8 =0000000000000007 R9 =0000000000000001 R10=ffffed1001c644a1 R11=ffffffff81806f71 R12=0000000000000d40 R13=0000000000000d40 R14=0000000000000001 R15=0000000000000d40 RIP=ffffffff813ad69f RFL=00000282 [--S----] 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 00007f3174992900 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=00007f3174f49618 CR3=000000001a626000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c04400 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=00007f0df15059b0 CR3=000000000f576000 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=98ed53a2d66a04868d43aa9440421004 XMM02=ec2efd57dc4c00df000000000011dc18 XMM03=d1eda111abaa5f75000000000011dce8 XMM04=f63086d3bc8859dd00000000000ae988 XMM05=19e9129bd510f2350000000000133500 XMM06=4fda316b135da52b0000000000133388 XMM07=e042d86d42eb936e0000000000122338 XMM08=d1eda111abaa5f75000000000011dce8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000