[ 30.722402] BUG: Bad rss-counter state mm:00000000f0e9d532 type:MM_FILEPAGES val:33 [ 30.723422] BUG: Bad rss-counter state mm:00000000f0e9d532 type:MM_ANONPAGES val:22 [ 30.887883] ================================================================== [ 30.888809] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.889753] Read of size 8 at addr ffff88800db68d08 by task sshd/218 [ 30.890531] [ 30.890755] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.891745] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.892747] Call Trace: [ 30.893064] [ 30.893350] dump_stack_lvl+0x91/0xf0 [ 30.893852] print_report+0xcc/0x620 [ 30.894346] ? __virt_addr_valid+0x102/0x340 [ 30.894905] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.895529] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.896163] kasan_report+0xbe/0xf0 [ 30.896652] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.897279] vma_interval_tree_remove+0xc75/0xec0 [ 30.897882] vma_prepare+0xc54/0x11a0 [ 30.898363] __split_vma+0x5af/0x950 [ 30.898837] ? __pfx___split_vma+0x10/0x10 [ 30.899371] ? find_held_lock+0x2c/0x110 [ 30.899891] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.900479] ? lock_is_held_type+0x9f/0x120 [ 30.901019] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.901628] ? mtree_range_walk+0x632/0x900 [ 30.902180] ? mas_walk+0x5c7/0x7c0 [ 30.902658] do_vmi_munmap+0x1f1/0x2b0 [ 30.903155] mmap_region+0x1f9/0x2660 [ 30.903640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.904153] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.904876] ? __pfx_lock_acquire+0x10/0x10 [ 30.905407] ? __pfx_mmap_region+0x10/0x10 [ 30.905935] ? security_mmap_addr+0x7d/0xa0 [ 30.906466] ? get_unmapped_area+0x1f5/0x3f0 [ 30.907018] do_mmap+0x854/0xf00 [ 30.907466] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.907963] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.908536] ksys_mmap_pgoff+0x3af/0x500 [ 30.909044] do_syscall_64+0x3f/0x90 [ 30.909536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.910185] RIP: 0033:0x7fb31faf9d82 [ 30.910650] 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 [ 30.912815] RSP: 002b:00007ffd97736358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.913733] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb31faf9d82 [ 30.914595] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb31ef33000 [ 30.915473] RBP: 00007fb31ef33000 R08: 0000000000000009 R09: 0000000000001000 [ 30.916356] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6a039bec0 [ 30.917214] R13: 00007ffd97736370 R14: 00007ffd977363a0 R15: 00007ffd97736700 [ 30.918081] [ 30.918385] [ 30.918603] Allocated by task 211: [ 30.919033] kasan_save_stack+0x22/0x50 [ 30.919555] kasan_set_track+0x25/0x30 [ 30.920060] __kasan_slab_alloc+0x59/0x70 [ 30.920599] kmem_cache_alloc+0x16b/0x370 [ 30.921117] vm_area_dup+0x20/0x160 [ 30.921571] __split_vma+0x170/0x950 [ 30.922041] split_vma+0xc6/0x110 [ 30.922481] mprotect_fixup+0x8d2/0xb30 [ 30.922984] do_mprotect_pkey+0x87e/0xd40 [ 30.923506] __x64_sys_mprotect+0x78/0xc0 [ 30.924028] do_syscall_64+0x3f/0x90 [ 30.924510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.925148] [ 30.925364] Freed by task 19: [ 30.925750] kasan_save_stack+0x22/0x50 [ 30.926254] kasan_set_track+0x25/0x30 [ 30.926749] kasan_save_free_info+0x2b/0x50 [ 30.927283] __kasan_slab_free+0x10a/0x190 [ 30.927816] kmem_cache_free+0x10d/0x4d0 [ 30.928336] rcu_core+0x8c8/0x2860 [ 30.928784] __do_softirq+0x1b7/0x7d4 [ 30.929267] [ 30.929483] Last potentially related work creation: [ 30.930064] kasan_save_stack+0x22/0x50 [ 30.930571] __kasan_record_aux_stack+0x8e/0xa0 [ 30.931149] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.931797] remove_vma+0x139/0x170 [ 30.932269] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.932826] do_vmi_munmap+0x1f1/0x2b0 [ 30.933318] __vm_munmap+0x138/0x3a0 [ 30.933793] __x64_sys_munmap+0x59/0x80 [ 30.934309] do_syscall_64+0x3f/0x90 [ 30.934784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.935441] [ 30.935658] Second to last potentially related work creation: [ 30.936355] kasan_save_stack+0x22/0x50 [ 30.936872] __kasan_record_aux_stack+0x8e/0xa0 [ 30.937455] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.938112] remove_vma+0x139/0x170 [ 30.938570] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.939127] do_vmi_munmap+0x1f1/0x2b0 [ 30.939615] mmap_region+0x1f9/0x2660 [ 30.940094] do_mmap+0x854/0xf00 [ 30.940546] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.941034] ksys_mmap_pgoff+0x3af/0x500 [ 30.941530] do_syscall_64+0x3f/0x90 [ 30.942015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.942662] [ 30.942878] The buggy address belongs to the object at ffff88800db68cb0 [ 30.942878] which belongs to the cache vm_area_struct of size 168 [ 30.944354] The buggy address is located 88 bytes inside of [ 30.944354] freed 168-byte region [ffff88800db68cb0, ffff88800db68d58) [ 30.945744] [ 30.945963] The buggy address belongs to the physical page: [ 30.946625] page:0000000043e57565 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb68 [ 30.947717] memcg:ffff8880100cf301 [ 30.948150] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.948859] page_type: 0xffffffff() [ 30.949308] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.950234] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880100cf301 [ 30.951135] page dumped because: kasan: bad access detected [ 30.951800] [ 30.952020] Memory state around the buggy address: [ 30.952613] ffff88800db68c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.953464] ffff88800db68c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.954324] >ffff88800db68d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.955180] ^ [ 30.955622] ffff88800db68d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.956506] ffff88800db68e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.957363] ================================================================== [ 30.958413] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.892471] BUG: Bad rss-counter state mm:0000000071baeb52 type:MM_FILEPAGES val:33 [ 32.893574] BUG: Bad rss-counter state mm:0000000071baeb52 type:MM_ANONPAGES val:22 [ 33.370470] BUG: Bad rss-counter state mm:000000002857d8c8 type:MM_FILEPAGES val:33 [ 33.371907] BUG: Bad rss-counter state mm:000000002857d8c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39105' (ECDSA) to the list of known hosts. 2023/06/21 00:24:32 fuzzer started 2023/06/21 00:24:32 dialing manager at localhost:36067 2023/06/21 00:24:32 checking machine... 2023/06/21 00:24:32 checking revisions... [ 34.125269] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:24:33 testing simple program... [ 34.173876] cgroup: Unknown subsys name 'net' [ 34.260521] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:24:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fa5f1709000 CR3=000000001031e000 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=2032333a34323a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a34323a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008c14aa0 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016c4fd01 RSI=ffff888016c4fd80 RDI=ffff888016c4fd80 RBP=ffff888016c4f980 RSP=ffff888016c4f8b8 R8 =0000000000000001 R9 =ffff888016c4f968 R10=0000000000038001 R11=0000000000024383 R12=ffff888016c4f988 R13=ffff888016c4f970 R14=ffff888016c4fd80 R15=ffff888016c4f928 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007fef0facc900 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=00007fef10083618 CR3=000000001a3c8000 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=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