[ 29.929951] BUG: Bad rss-counter state mm:00000000ce1fd08b type:MM_FILEPAGES val:33 [ 29.931207] BUG: Bad rss-counter state mm:00000000ce1fd08b type:MM_ANONPAGES val:22 [ 30.138261] hrtimer: interrupt took 3483895 ns [ 30.142679] ================================================================== [ 30.143324] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.144087] Read of size 8 at addr ffff888016f7d3f8 by task sshd/220 [ 30.144740] [ 30.144903] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.145606] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.151608] Call Trace: [ 30.151856] <TASK> [ 30.152065] dump_stack_lvl+0x91/0xf0 [ 30.152447] print_report+0xcc/0x620 [ 30.152809] ? __virt_addr_valid+0x102/0x340 [ 30.153219] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.156715] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.157179] kasan_report+0xbe/0xf0 [ 30.157543] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.158948] vma_interval_tree_remove+0xc75/0xec0 [ 30.159350] vma_prepare+0xc54/0x11a0 [ 30.159673] __split_vma+0x5af/0x950 [ 30.159987] ? __pfx___split_vma+0x10/0x10 [ 30.160335] ? find_held_lock+0x2c/0x110 [ 30.160723] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.161100] ? lock_is_held_type+0x9f/0x120 [ 30.161473] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.165274] ? mtree_range_walk+0x632/0x900 [ 30.165804] ? mas_walk+0x5c7/0x7c0 [ 30.166129] do_vmi_munmap+0x1f1/0x2b0 [ 30.166465] mmap_region+0x1f9/0x2660 [ 30.166832] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.167178] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.167722] ? __pfx_lock_acquire+0x10/0x10 [ 30.168078] ? __pfx_mmap_region+0x10/0x10 [ 30.168438] ? security_mmap_addr+0x7d/0xa0 [ 30.168863] ? get_unmapped_area+0x1f5/0x3f0 [ 30.169229] do_mmap+0x854/0xf00 [ 30.169519] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.171274] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.171741] ksys_mmap_pgoff+0x3af/0x500 [ 30.172077] do_syscall_64+0x3f/0x90 [ 30.172405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.172882] RIP: 0033:0x7fcfa8cf7d82 [ 30.173188] 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 [ 30.179021] RSP: 002b:00007ffd90dce128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.179709] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcfa8cf7d82 [ 30.180263] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcfa8131000 [ 30.180957] RBP: 00007fcfa8131000 R08: 0000000000000009 R09: 0000000000001000 [ 30.181537] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9df74bec0 [ 30.188122] R13: 00007ffd90dce140 R14: 00007ffd90dce170 R15: 00007ffd90dce4d0 [ 30.188689] </TASK> [ 30.188887] [ 30.189035] Allocated by task 212: [ 30.189321] kasan_save_stack+0x22/0x50 [ 30.189774] kasan_set_track+0x25/0x30 [ 30.190109] __kasan_slab_alloc+0x59/0x70 [ 30.190456] kmem_cache_alloc+0x16b/0x370 [ 30.190831] vm_area_dup+0x20/0x160 [ 30.191122] __split_vma+0x170/0x950 [ 30.191421] split_vma+0xc6/0x110 [ 30.191733] mprotect_fixup+0x8d2/0xb30 [ 30.192070] do_mprotect_pkey+0x87e/0xd40 [ 30.192452] __x64_sys_mprotect+0x78/0xc0 [ 30.192863] do_syscall_64+0x3f/0x90 [ 30.193228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.193871] [ 30.194036] Freed by task 19: [ 30.194314] kasan_save_stack+0x22/0x50 [ 30.194719] kasan_set_track+0x25/0x30 [ 30.195076] kasan_save_free_info+0x2b/0x50 [ 30.195482] __kasan_slab_free+0x10a/0x190 [ 30.195885] kmem_cache_free+0x10d/0x4d0 [ 30.196212] rcu_core+0x8c8/0x2860 [ 30.196535] __do_softirq+0x1b7/0x7d4 [ 30.196874] [ 30.197044] Last potentially related work creation: [ 30.197477] kasan_save_stack+0x22/0x50 [ 30.197854] __kasan_record_aux_stack+0x8e/0xa0 [ 30.198269] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.198727] remove_vma+0x139/0x170 [ 30.199024] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.199408] do_vmi_munmap+0x1f1/0x2b0 [ 30.199753] __vm_munmap+0x138/0x3a0 [ 30.200089] __x64_sys_munmap+0x59/0x80 [ 30.200438] do_syscall_64+0x3f/0x90 [ 30.200795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.201280] [ 30.201424] The buggy address belongs to the object at ffff888016f7d3a0 [ 30.201424] which belongs to the cache vm_area_struct of size 168 [ 30.202451] The buggy address is located 88 bytes inside of [ 30.202451] freed 168-byte region [ffff888016f7d3a0, ffff888016f7d448) [ 30.203374] [ 30.203524] The buggy address belongs to the physical page: [ 30.203995] page:00000000d65d7d01 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f7d [ 30.204713] memcg:ffff888009842801 [ 30.204991] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.205431] page_type: 0xffffffff() [ 30.206351] raw: 0100000000000200 ffff88800879fc80 ffffea00005bde80 0000000000000008 [ 30.207055] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009842801 [ 30.207741] page dumped because: kasan: bad access detected [ 30.208168] [ 30.208323] Memory state around the buggy address: [ 30.208805] ffff888016f7d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.209369] ffff888016f7d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.211209] >ffff888016f7d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.211895] ^ [ 30.212475] ffff888016f7d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.213121] ffff888016f7d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.214787] ================================================================== [ 30.226779] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.558069] BUG: Bad rss-counter state mm:00000000f3d1c72c type:MM_FILEPAGES val:33 [ 32.558782] BUG: Bad rss-counter state mm:00000000f3d1c72c type:MM_ANONPAGES val:22 [ 33.409740] BUG: Bad rss-counter state mm:00000000ce337b2f type:MM_FILEPAGES val:33 [ 33.410365] BUG: Bad rss-counter state mm:00000000ce337b2f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44599' (ECDSA) to the list of known hosts. 2023/06/20 10:19:59 fuzzer started 2023/06/20 10:20:00 dialing manager at localhost:44161 2023/06/20 10:20:00 checking machine... 2023/06/20 10:20:00 checking revisions... [ 34.254857] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:20:00 testing simple program... [ 34.302852] cgroup: Unknown subsys name 'net' [ 34.434619] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:20:00 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff888009f80000 RCX=0000000000000100 RDX=1ffff110013f0208 RSI=ffffffff8301b1cf RDI=000000000000000a RBP=0000000000000083 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888008476800 R14=ffff888009f81040 R15=000000000000000a RIP=ffffffff8301b1f7 RFL=00000046 [---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 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=00007fba7db237f0 CR3=000000000e2a8000 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=2039353a39313a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a39313a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86137009 RBX=0000000000000001 RCX=ffffffff86137004 RDX=0000000000000000 RSI=1ffffffff0c26e01 RDI=ffffffff85dfc6a4 RBP=ffff88801bc5f708 RSP=ffff88801bc5f640 R8 =ffffffff86137004 R9 =ffff88801bc5f6f0 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88801bc5f710 R13=ffff88801bc5f6f8 R14=ffff88801bc5f6f1 R15=ffff88801bc5f6b0 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 00007f2870240900 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=00007f28701f9008 CR3=000000000caf6000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000