syzkaller login: [ 30.838282] BUG: Bad rss-counter state mm:00000000753a4072 type:MM_FILEPAGES val:33 [ 30.839596] BUG: Bad rss-counter state mm:00000000753a4072 type:MM_ANONPAGES val:22 [ 30.876093] ================================================================== [ 30.877095] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.878044] Read of size 8 at addr ffff88800ec1fdf0 by task sshd/220 [ 30.878818] [ 30.879042] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.879911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.880887] Call Trace: [ 30.881204] <TASK> [ 30.881490] dump_stack_lvl+0x91/0xf0 [ 30.881987] print_report+0xcc/0x620 [ 30.882475] ? __virt_addr_valid+0x102/0x340 [ 30.883033] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.883653] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.884275] kasan_report+0xbe/0xf0 [ 30.884747] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.885370] vma_interval_tree_remove+0xc75/0xec0 [ 30.885996] vma_prepare+0xc54/0x11a0 [ 30.886473] __split_vma+0x5af/0x950 [ 30.886946] ? __pfx___split_vma+0x10/0x10 [ 30.887685] ? find_held_lock+0x2c/0x110 [ 30.888206] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.888778] ? lock_is_held_type+0x9f/0x120 [ 30.889317] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.889944] ? mtree_range_walk+0x632/0x900 [ 30.890489] ? mas_walk+0x5c7/0x7c0 [ 30.890967] do_vmi_munmap+0x1f1/0x2b0 [ 30.891460] mmap_region+0x1f9/0x2660 [ 30.891946] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.892461] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.893198] ? __pfx_lock_acquire+0x10/0x10 [ 30.893758] ? __pfx_mmap_region+0x10/0x10 [ 30.894290] ? security_mmap_addr+0x7d/0xa0 [ 30.894821] ? get_unmapped_area+0x1f5/0x3f0 [ 30.895369] do_mmap+0x854/0xf00 [ 30.895819] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.896313] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.896874] ksys_mmap_pgoff+0x3af/0x500 [ 30.897381] do_syscall_64+0x3f/0x90 [ 30.897883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.898529] RIP: 0033:0x7fd31ca33d82 [ 30.898990] 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 [ 30.901143] RSP: 002b:00007fffa6f41bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.902045] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd31ca33d82 [ 30.902883] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd31be6d000 [ 30.903719] RBP: 00007fd31be6d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.904556] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd1c390f70 [ 30.905404] R13: 00007fffa6f41bd0 R14: 00007fffa6f41c00 R15: 00007fffa6f41f60 [ 30.906261] </TASK> [ 30.906557] [ 30.906774] Allocated by task 213: [ 30.907200] kasan_save_stack+0x22/0x50 [ 30.907703] kasan_set_track+0x25/0x30 [ 30.908199] __kasan_slab_alloc+0x59/0x70 [ 30.908718] kmem_cache_alloc+0x16b/0x370 [ 30.909234] vm_area_dup+0x20/0x160 [ 30.909700] __split_vma+0x170/0x950 [ 30.910162] split_vma+0xc6/0x110 [ 30.910599] mprotect_fixup+0x8d2/0xb30 [ 30.911103] do_mprotect_pkey+0x87e/0xd40 [ 30.911622] __x64_sys_mprotect+0x78/0xc0 [ 30.912141] do_syscall_64+0x3f/0x90 [ 30.912613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.913259] [ 30.913475] Freed by task 213: [ 30.913902] kasan_save_stack+0x22/0x50 [ 30.914405] kasan_set_track+0x25/0x30 [ 30.914901] kasan_save_free_info+0x2b/0x50 [ 30.915437] __kasan_slab_free+0x10a/0x190 [ 30.915967] kmem_cache_free+0x10d/0x4d0 [ 30.916470] rcu_core+0x8c8/0x2860 [ 30.916919] __do_softirq+0x1b7/0x7d4 [ 30.917395] [ 30.917634] Last potentially related work creation: [ 30.918220] kasan_save_stack+0x22/0x50 [ 30.918727] __kasan_record_aux_stack+0x8e/0xa0 [ 30.919298] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.919941] remove_vma+0x139/0x170 [ 30.920395] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.920950] do_vmi_munmap+0x1f1/0x2b0 [ 30.921436] __vm_munmap+0x138/0x3a0 [ 30.921911] __x64_sys_munmap+0x59/0x80 [ 30.922403] do_syscall_64+0x3f/0x90 [ 30.922881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.923519] [ 30.923735] The buggy address belongs to the object at ffff88800ec1fd98 [ 30.923735] which belongs to the cache vm_area_struct of size 168 [ 30.925186] The buggy address is located 88 bytes inside of [ 30.925186] freed 168-byte region [ffff88800ec1fd98, ffff88800ec1fe40) [ 30.926585] [ 30.926801] The buggy address belongs to the physical page: [ 30.927458] page:0000000043507f60 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec1f [ 30.928527] memcg:ffff88800e406f01 [ 30.928953] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.929605] page_type: 0xffffffff() [ 30.930056] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.930972] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e406f01 [ 30.931882] page dumped because: kasan: bad access detected [ 30.932541] [ 30.932757] Memory state around the buggy address: [ 30.933326] ffff88800ec1fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.934184] ffff88800ec1fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.935042] >ffff88800ec1fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.935892] ^ [ 30.936695] ffff88800ec1fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.937556] ffff88800ec1fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.938409] ================================================================== [ 30.939453] Disabling lock debugging due to kernel taint [ 32.775192] BUG: Bad rss-counter state mm:00000000a3b6df21 type:MM_FILEPAGES val:33 [ 32.776448] BUG: Bad rss-counter state mm:00000000a3b6df21 type:MM_ANONPAGES val:22 [ 33.260203] BUG: Bad rss-counter state mm:00000000a4c827bd type:MM_FILEPAGES val:33 [ 33.261472] BUG: Bad rss-counter state mm:00000000a4c827bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19895' (ECDSA) to the list of known hosts. 2023/06/20 04:08:19 fuzzer started 2023/06/20 04:08:19 dialing manager at localhost:44161 2023/06/20 04:08:19 checking machine... 2023/06/20 04:08:19 checking revisions... [ 33.960109] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:08:19 testing simple program... [ 34.017948] cgroup: Unknown subsys name 'net' [ 34.056828] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:08:18 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff860546c8 RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864baff8 RDI=ffffffff8605469c RBP=ffffffff860546bc RSP=ffff88806ce099e0 R8 =ffffffff864baff8 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffffffff860546d8 R13=ffffffff8605469c R14=ffffffff860546b8 R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 00007f9714ca2900 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=00007f971525a0b0 CR3=000000001c91c000 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=2038313a38303a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a38303a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f410be33b80 CR3=000000000d858000 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=25de4df38e74e6a94640910a58ad6b8e XMM02=000000000011d328eff9b2d0a8fce9cb XMM03=000000000011d3f82c67c8bc2e329bc3 XMM04=d7846e520f0cf5ef00000000000ae988 XMM05=19e9129bd510f2350000000000133c80 XMM06=f515bc09b3a992090000000000132ae8 XMM07=e042d86d42eb936e00000000001243f8 XMM08=c759d40e9b1aee3f000000000011d3f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000