[ 34.982754] BUG: Bad rss-counter state mm:00000000b75c47b7 type:MM_FILEPAGES val:33 [ 34.983779] BUG: Bad rss-counter state mm:00000000b75c47b7 type:MM_ANONPAGES val:22 [ 35.143707] ================================================================== [ 35.144837] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.145990] Read of size 8 at addr ffff888019c92ed8 by task sshd/220 [ 35.147025] [ 35.147249] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.148139] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.149149] Call Trace: [ 35.149496] <TASK> [ 35.149780] dump_stack_lvl+0x91/0xf0 [ 35.150292] print_report+0xcc/0x620 [ 35.150792] ? __virt_addr_valid+0x102/0x340 [ 35.151372] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.152001] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.152646] kasan_report+0xbe/0xf0 [ 35.153126] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.153770] vma_interval_tree_remove+0xc75/0xec0 [ 35.154394] vma_prepare+0xc54/0x11a0 [ 35.154875] __split_vma+0x5af/0x950 [ 35.155363] ? __pfx___split_vma+0x10/0x10 [ 35.155892] ? find_held_lock+0x2c/0x110 [ 35.156432] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.157028] ? lock_is_held_type+0x9f/0x120 [ 35.157596] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.158214] ? mtree_range_walk+0x632/0x900 [ 35.158789] ? mas_walk+0x5c7/0x7c0 [ 35.159272] do_vmi_munmap+0x1f1/0x2b0 [ 35.159799] mmap_region+0x1f9/0x2660 [ 35.160289] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.160824] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.161555] ? __pfx_lock_acquire+0x10/0x10 [ 35.162103] ? __pfx_mmap_region+0x10/0x10 [ 35.162668] ? security_mmap_addr+0x7d/0xa0 [ 35.163203] ? get_unmapped_area+0x1f5/0x3f0 [ 35.163777] do_mmap+0x854/0xf00 [ 35.164218] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.164740] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.165317] ksys_mmap_pgoff+0x3af/0x500 [ 35.165828] do_syscall_64+0x3f/0x90 [ 35.166333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.166987] RIP: 0033:0x7fd2480c5d82 [ 35.167465] 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 [ 35.169655] RSP: 002b:00007fffec2f6a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.170578] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd2480c5d82 [ 35.171457] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd2474ff000 [ 35.172321] RBP: 00007fd2474ff000 R08: 0000000000000009 R09: 0000000000001000 [ 35.173182] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d27c95aec0 [ 35.174044] R13: 00007fffec2f6a30 R14: 00007fffec2f6a60 R15: 00007fffec2f6dc0 [ 35.174917] </TASK> [ 35.175214] [ 35.175446] Allocated by task 213: [ 35.175891] kasan_save_stack+0x22/0x50 [ 35.176425] kasan_set_track+0x25/0x30 [ 35.176949] __kasan_slab_alloc+0x59/0x70 [ 35.177499] kmem_cache_alloc+0x16b/0x370 [ 35.178033] vm_area_dup+0x20/0x160 [ 35.178513] __split_vma+0x170/0x950 [ 35.178985] split_vma+0xc6/0x110 [ 35.179441] mprotect_fixup+0x8d2/0xb30 [ 35.179957] do_mprotect_pkey+0x87e/0xd40 [ 35.180512] __x64_sys_mprotect+0x78/0xc0 [ 35.181062] do_syscall_64+0x3f/0x90 [ 35.181556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.182213] [ 35.182444] Freed by task 204: [ 35.182843] kasan_save_stack+0x22/0x50 [ 35.183368] kasan_set_track+0x25/0x30 [ 35.183874] kasan_save_free_info+0x2b/0x50 [ 35.184442] __kasan_slab_free+0x10a/0x190 [ 35.184989] kmem_cache_free+0x10d/0x4d0 [ 35.185512] rcu_core+0x8c8/0x2860 [ 35.185959] __do_softirq+0x1b7/0x7d4 [ 35.186453] [ 35.186668] Last potentially related work creation: [ 35.187264] kasan_save_stack+0x22/0x50 [ 35.187843] __kasan_record_aux_stack+0x8e/0xa0 [ 35.188459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.189129] remove_vma+0x139/0x170 [ 35.189596] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.190165] do_vmi_munmap+0x1f1/0x2b0 [ 35.190661] __vm_munmap+0x138/0x3a0 [ 35.191124] __x64_sys_munmap+0x59/0x80 [ 35.191637] do_syscall_64+0x3f/0x90 [ 35.192107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.192781] [ 35.193003] The buggy address belongs to the object at ffff888019c92e80 [ 35.193003] which belongs to the cache vm_area_struct of size 168 [ 35.194500] The buggy address is located 88 bytes inside of [ 35.194500] freed 168-byte region [ffff888019c92e80, ffff888019c92f28) [ 35.195930] [ 35.196152] The buggy address belongs to the physical page: [ 35.196856] page:000000008e240bef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c92 [ 35.197972] memcg:ffff8880167b8501 [ 35.198412] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.199060] page_type: 0xffffffff() [ 35.199527] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.200473] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167b8501 [ 35.201424] page dumped because: kasan: bad access detected [ 35.202099] [ 35.202325] Memory state around the buggy address: [ 35.202916] ffff888019c92d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.203793] ffff888019c92e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.204710] >ffff888019c92e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.205593] ^ [ 35.206336] ffff888019c92f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.207199] ffff888019c92f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.208071] ================================================================== [ 35.209019] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.176253] BUG: Bad rss-counter state mm:00000000a493587b type:MM_FILEPAGES val:33 [ 37.177237] BUG: Bad rss-counter state mm:00000000a493587b type:MM_ANONPAGES val:22 [ 37.659480] BUG: Bad rss-counter state mm:00000000d42de143 type:MM_FILEPAGES val:33 [ 37.660477] BUG: Bad rss-counter state mm:00000000d42de143 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24525' (ECDSA) to the list of known hosts. 2023/06/19 22:41:13 fuzzer started 2023/06/19 22:41:13 dialing manager at localhost:44161 2023/06/19 22:41:13 checking machine... 2023/06/19 22:41:13 checking revisions... [ 38.375563] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:41:13 testing simple program... [ 38.432646] cgroup: Unknown subsys name 'net' [ 38.526486] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:41:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe90b078b8 CR3=000000000dc60000 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=2032313a31343a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a31343a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a78 RCX=0000000000000001 RDX=1ffff1100d9e135a RSI=ffff888016ceff48 RDI=ffffffff846000aa RBP=ffff88806cf09ad0 RSP=ffff88806cf09a60 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888016da3680 R15=ffff88801805e600 RIP=ffffffff811303b2 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 00007f1ef5c68900 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=00007ffcbdf69000 CR3=0000000009466000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000