[ 31.973754] BUG: Bad rss-counter state mm:00000000fef54a12 type:MM_FILEPAGES val:33 [ 31.975239] BUG: Bad rss-counter state mm:00000000fef54a12 type:MM_ANONPAGES val:22 [ 32.146553] ================================================================== [ 32.147543] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.148675] Read of size 8 at addr ffff88800e356140 by task sshd/218 [ 32.149570] [ 32.149810] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.150763] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.151815] Call Trace: [ 32.152161] [ 32.152469] dump_stack_lvl+0x91/0xf0 [ 32.153000] print_report+0xcc/0x620 [ 32.153552] ? __virt_addr_valid+0x102/0x340 [ 32.154155] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.154823] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.155516] kasan_report+0xbe/0xf0 [ 32.156039] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.156712] vma_interval_tree_remove+0xc75/0xec0 [ 32.157382] vma_prepare+0xc54/0x11a0 [ 32.157909] __split_vma+0x5af/0x950 [ 32.158425] ? __pfx___split_vma+0x10/0x10 [ 32.159010] ? find_held_lock+0x2c/0x110 [ 32.159573] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.160186] ? lock_is_held_type+0x9f/0x120 [ 32.160768] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.161453] ? mtree_range_walk+0x632/0x900 [ 32.162057] ? mas_walk+0x5c7/0x7c0 [ 32.162572] do_vmi_munmap+0x1f1/0x2b0 [ 32.163107] mmap_region+0x1f9/0x2660 [ 32.163636] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.164212] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.165012] ? __pfx_lock_acquire+0x10/0x10 [ 32.165612] ? __pfx_mmap_region+0x10/0x10 [ 32.166209] ? security_mmap_addr+0x7d/0xa0 [ 32.166812] ? get_unmapped_area+0x1f5/0x3f0 [ 32.167433] do_mmap+0x854/0xf00 [ 32.167930] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.168492] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.169122] ksys_mmap_pgoff+0x3af/0x500 [ 32.169720] do_syscall_64+0x3f/0x90 [ 32.170262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.170989] RIP: 0033:0x7f03ad8cad82 [ 32.171501] 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 [ 32.173922] RSP: 002b:00007ffd2b429378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.174946] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03ad8cad82 [ 32.175899] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03acd04000 [ 32.176844] RBP: 00007f03acd04000 R08: 0000000000000009 R09: 0000000000001000 [ 32.177796] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b5861eec0 [ 32.178738] R13: 00007ffd2b429390 R14: 00007ffd2b4293c0 R15: 00007ffd2b429720 [ 32.179694] [ 32.180019] [ 32.180260] Allocated by task 209: [ 32.180738] kasan_save_stack+0x22/0x50 [ 32.181320] kasan_set_track+0x25/0x30 [ 32.181871] __kasan_slab_alloc+0x59/0x70 [ 32.182455] kmem_cache_alloc+0x16b/0x370 [ 32.183032] vm_area_dup+0x20/0x160 [ 32.183540] __split_vma+0x170/0x950 [ 32.184073] split_vma+0xc6/0x110 [ 32.184564] mprotect_fixup+0x8d2/0xb30 [ 32.185121] do_mprotect_pkey+0x87e/0xd40 [ 32.185716] __x64_sys_mprotect+0x78/0xc0 [ 32.186295] do_syscall_64+0x3f/0x90 [ 32.186824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.187543] [ 32.187784] Freed by task 209: [ 32.188221] kasan_save_stack+0x22/0x50 [ 32.188783] kasan_set_track+0x25/0x30 [ 32.189352] kasan_save_free_info+0x2b/0x50 [ 32.189952] __kasan_slab_free+0x10a/0x190 [ 32.190545] kmem_cache_free+0x10d/0x4d0 [ 32.191113] rcu_core+0x8c8/0x2860 [ 32.191607] __do_softirq+0x1b7/0x7d4 [ 32.192136] [ 32.192378] Last potentially related work creation: [ 32.193031] kasan_save_stack+0x22/0x50 [ 32.193607] __kasan_record_aux_stack+0x8e/0xa0 [ 32.194255] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.194981] remove_vma+0x139/0x170 [ 32.195484] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.196107] do_vmi_munmap+0x1f1/0x2b0 [ 32.196648] __vm_munmap+0x138/0x3a0 [ 32.197172] __x64_sys_munmap+0x59/0x80 [ 32.197722] do_syscall_64+0x3f/0x90 [ 32.198244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.198957] [ 32.199199] The buggy address belongs to the object at ffff88800e3560e8 [ 32.199199] which belongs to the cache vm_area_struct of size 168 [ 32.200830] The buggy address is located 88 bytes inside of [ 32.200830] freed 168-byte region [ffff88800e3560e8, ffff88800e356190) [ 32.202410] [ 32.202646] The buggy address belongs to the physical page: [ 32.203367] page:000000008a882106 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe356 [ 32.204563] memcg:ffff88800e326101 [ 32.205033] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.205754] page_type: 0xffffffff() [ 32.206256] raw: 0100000000000200 ffff88800879fc80 ffffea000039bd40 dead000000000004 [ 32.207295] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e326101 [ 32.208297] page dumped because: kasan: bad access detected [ 32.209026] [ 32.209284] Memory state around the buggy address: [ 32.209936] ffff88800e356000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.210887] ffff88800e356080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.211843] >ffff88800e356100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.212794] ^ [ 32.213514] ffff88800e356180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 32.214440] ffff88800e356200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.215371] ================================================================== [ 32.216454] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.810550] BUG: Bad rss-counter state mm:00000000c9c1ef67 type:MM_FILEPAGES val:33 [ 34.811317] BUG: Bad rss-counter state mm:00000000c9c1ef67 type:MM_ANONPAGES val:22 [ 35.291723] BUG: Bad rss-counter state mm:00000000050b48a6 type:MM_FILEPAGES val:33 [ 35.293239] BUG: Bad rss-counter state mm:00000000050b48a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32701' (ECDSA) to the list of known hosts. 2023/06/20 06:08:21 fuzzer started 2023/06/20 06:08:21 dialing manager at localhost:44161 2023/06/20 06:08:21 checking machine... 2023/06/20 06:08:21 checking revisions... [ 36.100516] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:08:21 testing simple program... [ 36.150301] cgroup: Unknown subsys name 'net' [ 36.201924] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:08:19 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800e47a500 RCX=0000000080000000 RDX=0000000000000001 RSI=ffffffff811fbeb6 RDI=ffff888017c91b40 RBP=ffff888017c91b40 RSP=ffff88800fda7e08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888017c923b8 R13=0000000000000001 R14=1ffff11001fb4fc5 R15=dffffc0000000000 RIP=ffffffff814c07f1 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 00007ff45821a900 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=00007ff4587cf650 CR3=000000000edd4000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=0000000000000001 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=0000560c1173c290 CR3=000000001643e000 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=2030323a38303a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a38303a3630203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000