syzkaller login: [ 31.130323] BUG: Bad rss-counter state mm:0000000022b42c9b type:MM_FILEPAGES val:33 [ 31.131524] BUG: Bad rss-counter state mm:0000000022b42c9b type:MM_ANONPAGES val:22 [ 31.167805] ================================================================== [ 31.168842] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.169784] Read of size 8 at addr ffff88800e541140 by task sshd/221 [ 31.170630] [ 31.170848] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.171732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.172727] Call Trace: [ 31.173048] [ 31.173333] dump_stack_lvl+0x91/0xf0 [ 31.173831] print_report+0xcc/0x620 [ 31.174313] ? __virt_addr_valid+0x102/0x340 [ 31.174859] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.175496] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.176109] kasan_report+0xbe/0xf0 [ 31.176584] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.177200] vma_interval_tree_remove+0xc75/0xec0 [ 31.177796] vma_prepare+0xc54/0x11a0 [ 31.178273] __split_vma+0x5af/0x950 [ 31.178737] ? __pfx___split_vma+0x10/0x10 [ 31.179266] ? find_held_lock+0x2c/0x110 [ 31.179784] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.180353] ? lock_is_held_type+0x9f/0x120 [ 31.180896] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.181498] ? mtree_range_walk+0x632/0x900 [ 31.182046] ? mas_walk+0x5c7/0x7c0 [ 31.182517] do_vmi_munmap+0x1f1/0x2b0 [ 31.183006] mmap_region+0x1f9/0x2660 [ 31.183502] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.184010] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.184715] ? __pfx_lock_acquire+0x10/0x10 [ 31.185251] ? __pfx_mmap_region+0x10/0x10 [ 31.185786] ? security_mmap_addr+0x7d/0xa0 [ 31.186315] ? get_unmapped_area+0x1f5/0x3f0 [ 31.186867] do_mmap+0x854/0xf00 [ 31.187311] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.187805] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.188368] ksys_mmap_pgoff+0x3af/0x500 [ 31.188872] do_syscall_64+0x3f/0x90 [ 31.189347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.189990] RIP: 0033:0x7efd3cb68d82 [ 31.190444] 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 [ 31.192585] RSP: 002b:00007ffeeac28478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.193489] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd3cb68d82 [ 31.194331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd3bfa2000 [ 31.195183] RBP: 00007efd3bfa2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.196023] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b97bfa8ec0 [ 31.196859] R13: 00007ffeeac28490 R14: 00007ffeeac284c0 R15: 00007ffeeac28820 [ 31.197712] [ 31.198002] [ 31.198216] Allocated by task 214: [ 31.198643] kasan_save_stack+0x22/0x50 [ 31.199149] kasan_set_track+0x25/0x30 [ 31.199645] __kasan_slab_alloc+0x59/0x70 [ 31.200165] kmem_cache_alloc+0x16b/0x370 [ 31.200676] vm_area_dup+0x20/0x160 [ 31.201123] __split_vma+0x170/0x950 [ 31.201586] split_vma+0xc6/0x110 [ 31.202021] mprotect_fixup+0x8d2/0xb30 [ 31.202514] do_mprotect_pkey+0x87e/0xd40 [ 31.203027] __x64_sys_mprotect+0x78/0xc0 [ 31.203566] do_syscall_64+0x3f/0x90 [ 31.204039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.204672] [ 31.204886] Freed by task 214: [ 31.205277] kasan_save_stack+0x22/0x50 [ 31.205779] kasan_set_track+0x25/0x30 [ 31.206266] kasan_save_free_info+0x2b/0x50 [ 31.206791] __kasan_slab_free+0x10a/0x190 [ 31.207336] kmem_cache_free+0x10d/0x4d0 [ 31.207838] rcu_core+0x8c8/0x2860 [ 31.208276] __do_softirq+0x1b7/0x7d4 [ 31.208750] [ 31.208962] Last potentially related work creation: [ 31.209535] kasan_save_stack+0x22/0x50 [ 31.210031] __kasan_record_aux_stack+0x8e/0xa0 [ 31.210601] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.211248] remove_vma+0x139/0x170 [ 31.211696] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.212252] do_vmi_munmap+0x1f1/0x2b0 [ 31.212734] __vm_munmap+0x138/0x3a0 [ 31.213197] __x64_sys_munmap+0x59/0x80 [ 31.213689] do_syscall_64+0x3f/0x90 [ 31.214165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214801] [ 31.215015] The buggy address belongs to the object at ffff88800e5410e8 [ 31.215015] which belongs to the cache vm_area_struct of size 168 [ 31.216498] The buggy address is located 88 bytes inside of [ 31.216498] freed 168-byte region [ffff88800e5410e8, ffff88800e541190) [ 31.217885] [ 31.218100] The buggy address belongs to the physical page: [ 31.218750] page:0000000013b6b0e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe541 [ 31.219836] memcg:ffff888016b91401 [ 31.220258] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.220906] page_type: 0xffffffff() [ 31.221357] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.222266] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b91401 [ 31.223163] page dumped because: kasan: bad access detected [ 31.223817] [ 31.224030] Memory state around the buggy address: [ 31.224606] ffff88800e541000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.225445] ffff88800e541080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.226286] >ffff88800e541100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.227137] ^ [ 31.227776] ffff88800e541180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.228659] ffff88800e541200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.229526] ================================================================== [ 31.230602] Disabling lock debugging due to kernel taint [ 33.196414] BUG: Bad rss-counter state mm:000000007c88af92 type:MM_FILEPAGES val:33 [ 33.197887] BUG: Bad rss-counter state mm:000000007c88af92 type:MM_ANONPAGES val:22 [ 33.651064] BUG: Bad rss-counter state mm:00000000de66d326 type:MM_FILEPAGES val:33 [ 33.652027] BUG: Bad rss-counter state mm:00000000de66d326 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58407' (ECDSA) to the list of known hosts. 2023/06/20 14:33:24 fuzzer started 2023/06/20 14:33:24 dialing manager at localhost:36067 2023/06/20 14:33:24 checking machine... 2023/06/20 14:33:24 checking revisions... [ 34.410744] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:33:24 testing simple program... [ 34.453950] cgroup: Unknown subsys name 'net' [ 34.521207] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:33:24 Registers: info registers vcpu 0 RAX=fffffffffba10fb8 RBX=ffffffff85dfe5ec RCX=ffffffff8180f5ba RDX=0000000000000000 RSI=ffffffff8613971a RDI=ffffffff85dfe5d0 RBP=ffffffff85dfe5d0 RSP=ffff888015f0f490 R8 =ffffffff8613971a R9 =ffff888015f0f588 R10=0000000000038001 R11=0000000000020f03 R12=ffffffff85dfe608 R13=ffffffff85dfe5d0 R14=ffffffff85dfe5d0 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f44a2cb0900 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=00007f44a3267618 CR3=0000000009746000 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=0000000000000001 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=00007f40bf895040 CR3=000000000c570000 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=d0dfea3e95e4c3995c4fc984405bed2f XMM02=2c67c8bc2e329bc3000000000011a740 XMM03=fb795ef6d65770560000000000121cb8 XMM04=1bad91d2f27aa6fe00000000000ae988 XMM05=d23e1fe69b06f4c700000000001328d8 XMM06=c291bd5c70af25b90000000000131978 XMM07=e042d86d42eb936e0000000000121f38 XMM08=ae0714e793b6dd60000000000011a7a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000