syzkaller login: [ 44.787537] BUG: Bad rss-counter state mm:000000005e38696c type:MM_FILEPAGES val:33 [ 44.789517] BUG: Bad rss-counter state mm:000000005e38696c type:MM_ANONPAGES val:22 [ 44.955123] ================================================================== [ 44.956049] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.957010] Read of size 8 at addr ffff88800964cd08 by task sshd/219 [ 44.957928] [ 44.958147] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.959056] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.960044] Call Trace: [ 44.960368] [ 44.960663] dump_stack_lvl+0x91/0xf0 [ 44.961202] print_report+0xcc/0x620 [ 44.961701] ? __virt_addr_valid+0x102/0x340 [ 44.962290] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.962958] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.963587] kasan_report+0xbe/0xf0 [ 44.964064] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.964695] vma_interval_tree_remove+0xc75/0xec0 [ 44.965333] vma_prepare+0xc54/0x11a0 [ 44.965832] __split_vma+0x5af/0x950 [ 44.966306] ? __pfx___split_vma+0x10/0x10 [ 44.966889] ? find_held_lock+0x2c/0x110 [ 44.967422] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.968012] ? lock_is_held_type+0x9f/0x120 [ 44.968566] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.969190] ? mtree_range_walk+0x632/0x900 [ 44.969754] ? mas_walk+0x5c7/0x7c0 [ 44.970234] do_vmi_munmap+0x1f1/0x2b0 [ 44.970783] mmap_region+0x1f9/0x2660 [ 44.971270] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.971797] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.972556] ? __pfx_lock_acquire+0x10/0x10 [ 44.973105] ? __pfx_mmap_region+0x10/0x10 [ 44.973657] ? security_mmap_addr+0x7d/0xa0 [ 44.974226] ? get_unmapped_area+0x1f5/0x3f0 [ 44.974826] do_mmap+0x854/0xf00 [ 44.975278] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.975786] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.976364] ksys_mmap_pgoff+0x3af/0x500 [ 44.976885] do_syscall_64+0x3f/0x90 [ 44.977379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.978087] RIP: 0033:0x7efcdd17ad82 [ 44.978611] 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 [ 44.980810] RSP: 002b:00007ffe5aff8998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.981737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efcdd17ad82 [ 44.982645] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efcdc5b4000 [ 44.983506] RBP: 00007efcdc5b4000 R08: 0000000000000009 R09: 0000000000001000 [ 44.984361] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641f5193b20 [ 44.985221] R13: 00007ffe5aff89b0 R14: 00007ffe5aff89e0 R15: 00007ffe5aff8d40 [ 44.986091] [ 44.986421] [ 44.986647] Allocated by task 212: [ 44.987083] kasan_save_stack+0x22/0x50 [ 44.987593] kasan_set_track+0x25/0x30 [ 44.988101] __kasan_slab_alloc+0x59/0x70 [ 44.988638] kmem_cache_alloc+0x16b/0x370 [ 44.989166] vm_area_dup+0x20/0x160 [ 44.989640] __split_vma+0x170/0x950 [ 44.990116] split_vma+0xc6/0x110 [ 44.990602] mprotect_fixup+0x8d2/0xb30 [ 44.991115] do_mprotect_pkey+0x87e/0xd40 [ 44.991645] __x64_sys_mprotect+0x78/0xc0 [ 44.992178] do_syscall_64+0x3f/0x90 [ 44.992655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.993302] [ 44.993523] Freed by task 212: [ 44.993917] kasan_save_stack+0x22/0x50 [ 44.994465] kasan_set_track+0x25/0x30 [ 44.994972] kasan_save_free_info+0x2b/0x50 [ 44.995512] __kasan_slab_free+0x10a/0x190 [ 44.996052] kmem_cache_free+0x10d/0x4d0 [ 44.996573] rcu_core+0x8c8/0x2860 [ 44.997023] __do_softirq+0x1b7/0x7d4 [ 44.997508] [ 44.997724] Last potentially related work creation: [ 44.998314] kasan_save_stack+0x22/0x50 [ 44.998882] __kasan_record_aux_stack+0x8e/0xa0 [ 44.999460] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.000110] remove_vma+0x139/0x170 [ 45.000562] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.001124] do_vmi_munmap+0x1f1/0x2b0 [ 45.001626] __vm_munmap+0x138/0x3a0 [ 45.002097] __x64_sys_munmap+0x59/0x80 [ 45.002654] do_syscall_64+0x3f/0x90 [ 45.003142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.003788] [ 45.004018] Second to last potentially related work creation: [ 45.004732] kasan_save_stack+0x22/0x50 [ 45.005243] __kasan_record_aux_stack+0x8e/0xa0 [ 45.005833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.006513] remove_vma+0x139/0x170 [ 45.006969] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.007537] do_vmi_munmap+0x1f1/0x2b0 [ 45.008038] mmap_region+0x1f9/0x2660 [ 45.008543] do_mmap+0x854/0xf00 [ 45.008990] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.009494] ksys_mmap_pgoff+0x3af/0x500 [ 45.010009] do_syscall_64+0x3f/0x90 [ 45.010528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.011184] [ 45.011401] The buggy address belongs to the object at ffff88800964ccb0 [ 45.011401] which belongs to the cache vm_area_struct of size 168 [ 45.012892] The buggy address is located 88 bytes inside of [ 45.012892] freed 168-byte region [ffff88800964ccb0, ffff88800964cd58) [ 45.014310] [ 45.014567] The buggy address belongs to the physical page: [ 45.015225] page:000000006361d9cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x964c [ 45.016305] memcg:ffff88800d7a0801 [ 45.016733] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.017390] page_type: 0xffffffff() [ 45.017844] raw: 0100000000000200 ffff88800879fc80 ffffea0000398040 dead000000000004 [ 45.018855] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7a0801 [ 45.019787] page dumped because: kasan: bad access detected [ 45.020454] [ 45.020673] Memory state around the buggy address: [ 45.021256] ffff88800964cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 45.022113] ffff88800964cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 45.023013] >ffff88800964cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 45.023863] ^ [ 45.024302] ffff88800964cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.025164] ffff88800964ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 45.026013] ================================================================== [ 45.027181] Disabling lock debugging due to kernel taint [ 47.273023] BUG: Bad rss-counter state mm:00000000331d2bef type:MM_FILEPAGES val:33 [ 47.274463] BUG: Bad rss-counter state mm:00000000331d2bef type:MM_ANONPAGES val:22 [ 47.851977] BUG: Bad rss-counter state mm:000000009312835a type:MM_FILEPAGES val:33 [ 47.853071] BUG: Bad rss-counter state mm:000000009312835a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63728' (ECDSA) to the list of known hosts. 2023/06/20 03:24:18 fuzzer started 2023/06/20 03:24:18 dialing manager at localhost:44161 2023/06/20 03:24:18 checking machine... 2023/06/20 03:24:18 checking revisions... [ 48.522764] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:24:18 testing simple program... [ 48.580125] cgroup: Unknown subsys name 'net' [ 48.636313] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:24:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f18f9c0 RCX=0000000000000001 RDX=1ffff11001e31f3a RSI=ffff88800f18ff08 RDI=ffff88800f18f9d0 RBP=ffff88800f18ff08 RSP=ffff88800f18f918 R8 =ffffffff860ab106 R9 =ffff88800f18fa00 R10=0000000000038001 R11=0000000000009789 R12=0000000000000008 R13=ffff88800f188000 R14=ffff88800f18ff10 R15=ffff88800f18f9c0 RIP=ffffffff8113046e 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 00007fd1bc9a7900 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=00007f82ddf81000 CR3=000000000fc22000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff812889a5 RBX=ffffffff813ad420 RCX=ffffffff864b1a01 RDX=1ffff1100d9e135e RSI=ffffffff812889a5 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff864b1a38 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b53b8 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88801a23d1b0 RIP=ffffffff84532440 RFL=00000286 [--S--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=00007fff2c673d18 CR3=0000000005482000 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=00007f79ebc8d510000055c7a559c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000