[ 24.482781] BUG: Bad rss-counter state mm:0000000063a601dc type:MM_FILEPAGES val:33 [ 24.483848] BUG: Bad rss-counter state mm:0000000063a601dc type:MM_ANONPAGES val:22 [ 24.600722] ================================================================== [ 24.601433] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.602177] Read of size 8 at addr ffff88800f2cab38 by task sshd/218 [ 24.602761] [ 24.602929] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.603606] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.604497] Call Trace: [ 24.604742] [ 24.604961] dump_stack_lvl+0x91/0xf0 [ 24.605352] print_report+0xcc/0x620 [ 24.605747] ? __virt_addr_valid+0x102/0x340 [ 24.606151] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.606523] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.606863] kasan_report+0xbe/0xf0 [ 24.607153] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.607504] vma_interval_tree_remove+0xc75/0xec0 [ 24.607840] vma_prepare+0xc54/0x11a0 [ 24.608114] __split_vma+0x5af/0x950 [ 24.608381] ? __pfx___split_vma+0x10/0x10 [ 24.608673] ? find_held_lock+0x2c/0x110 [ 24.608970] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.609298] ? lock_is_held_type+0x9f/0x120 [ 24.609609] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.609950] ? mtree_range_walk+0x632/0x900 [ 24.610281] ? mas_walk+0x5c7/0x7c0 [ 24.610571] do_vmi_munmap+0x1f1/0x2b0 [ 24.610842] mmap_region+0x1f9/0x2660 [ 24.611148] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.611454] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.611874] ? __pfx_lock_acquire+0x10/0x10 [ 24.612193] ? __pfx_mmap_region+0x10/0x10 [ 24.612510] ? security_mmap_addr+0x7d/0xa0 [ 24.612821] ? get_unmapped_area+0x1f5/0x3f0 [ 24.613152] do_mmap+0x854/0xf00 [ 24.613414] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.613722] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.614059] ksys_mmap_pgoff+0x3af/0x500 [ 24.614367] do_syscall_64+0x3f/0x90 [ 24.614646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.615044] RIP: 0033:0x7f472be7ed82 [ 24.615317] 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 [ 24.616576] RSP: 002b:00007ffc59e72e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.617120] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f472be7ed82 [ 24.617648] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f472b2b8000 [ 24.618156] RBP: 00007f472b2b8000 R08: 0000000000000009 R09: 0000000000001000 [ 24.618662] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e006d50ec0 [ 24.619216] R13: 00007ffc59e72e20 R14: 00007ffc59e72e50 R15: 00007ffc59e731b0 [ 24.619840] [ 24.620051] [ 24.620203] Allocated by task 210: [ 24.620509] kasan_save_stack+0x22/0x50 [ 24.620870] kasan_set_track+0x25/0x30 [ 24.621228] __kasan_slab_alloc+0x59/0x70 [ 24.621615] kmem_cache_alloc+0x16b/0x370 [ 24.621948] vm_area_dup+0x20/0x160 [ 24.622248] __split_vma+0x170/0x950 [ 24.622525] split_vma+0xc6/0x110 [ 24.622790] mprotect_fixup+0x8d2/0xb30 [ 24.623099] do_mprotect_pkey+0x87e/0xd40 [ 24.623412] __x64_sys_mprotect+0x78/0xc0 [ 24.623716] do_syscall_64+0x3f/0x90 [ 24.624006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.624422] [ 24.624549] Freed by task 210: [ 24.624785] kasan_save_stack+0x22/0x50 [ 24.625090] kasan_set_track+0x25/0x30 [ 24.625387] kasan_save_free_info+0x2b/0x50 [ 24.625718] __kasan_slab_free+0x10a/0x190 [ 24.626038] kmem_cache_free+0x10d/0x4d0 [ 24.626340] rcu_core+0x8c8/0x2860 [ 24.626601] __do_softirq+0x1b7/0x7d4 [ 24.626890] [ 24.627029] Last potentially related work creation: [ 24.627389] kasan_save_stack+0x22/0x50 [ 24.627684] __kasan_record_aux_stack+0x8e/0xa0 [ 24.628028] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.628420] remove_vma+0x139/0x170 [ 24.628683] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.629018] do_vmi_munmap+0x1f1/0x2b0 [ 24.629307] __vm_munmap+0x138/0x3a0 [ 24.629598] __x64_sys_munmap+0x59/0x80 [ 24.629891] do_syscall_64+0x3f/0x90 [ 24.630177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.630562] [ 24.630690] Second to last potentially related work creation: [ 24.631110] kasan_save_stack+0x22/0x50 [ 24.631407] __kasan_record_aux_stack+0x8e/0xa0 [ 24.631749] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.632145] remove_vma+0x139/0x170 [ 24.632415] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.632751] do_vmi_munmap+0x1f1/0x2b0 [ 24.633042] mmap_region+0x1f9/0x2660 [ 24.633327] do_mmap+0x854/0xf00 [ 24.633591] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.633886] ksys_mmap_pgoff+0x3af/0x500 [ 24.634185] do_syscall_64+0x3f/0x90 [ 24.634465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.634853] [ 24.634986] The buggy address belongs to the object at ffff88800f2caae0 [ 24.634986] which belongs to the cache vm_area_struct of size 168 [ 24.635884] The buggy address is located 88 bytes inside of [ 24.635884] freed 168-byte region [ffff88800f2caae0, ffff88800f2cab88) [ 24.636733] [ 24.636860] The buggy address belongs to the physical page: [ 24.637259] page:00000000a9203df1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2ca [ 24.637912] memcg:ffff8880103e1401 [ 24.638164] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.638556] page_type: 0xffffffff() [ 24.638821] raw: 0100000000000200 ffff88800879fc80 ffffea0000371540 0000000000000006 [ 24.639369] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880103e1401 [ 24.639905] page dumped because: kasan: bad access detected [ 24.640304] [ 24.640429] Memory state around the buggy address: [ 24.640774] ffff88800f2caa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.641303] ffff88800f2caa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 24.641824] >ffff88800f2cab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.642345] ^ [ 24.642710] ffff88800f2cab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.643236] ffff88800f2cac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.643745] ================================================================== [ 24.644378] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.526214] BUG: Bad rss-counter state mm:00000000e7b64344 type:MM_FILEPAGES val:33 [ 26.527385] BUG: Bad rss-counter state mm:00000000e7b64344 type:MM_ANONPAGES val:22 [ 26.908618] BUG: Bad rss-counter state mm:000000005e8fb1f4 type:MM_FILEPAGES val:33 [ 26.909688] BUG: Bad rss-counter state mm:000000005e8fb1f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12237' (ECDSA) to the list of known hosts. 2023/06/20 09:23:12 fuzzer started 2023/06/20 09:23:12 dialing manager at localhost:44161 2023/06/20 09:23:12 checking machine... 2023/06/20 09:23:12 checking revisions... [ 27.661133] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:23:12 testing simple program... [ 27.708931] cgroup: Unknown subsys name 'net' [ 27.765004] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:23:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880146a9000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88800fdbf800 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800fe85780 R13=ffff8880146a957c R14=ffff8880146a9579 R15=ffff8880146a9600 RIP=ffffffff83653b10 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 00007f04619bc900 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=00007ffd7ea34000 CR3=000000000ec6a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b10 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88806cf09a78 RBP=ffff888008d751c0 RSP=ffff88806cf09a20 R8 =0000000000000280 R9 =0000000000000000 R10=ffff88806cf09a78 R11=0000000000000000 R12=0000000000000000 R13=ffff88806cf09aa0 R14=ffff888008d751c0 R15=ffff88806cf09a78 RIP=ffffffff8450d41a RFL=00000247 [---Z-PC] 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 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=00007f66eade5f60 CR3=000000000c4b6000 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=2032313a33323a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a33323a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000