[ 24.596100] BUG: Bad rss-counter state mm:000000004d2f8dcb type:MM_FILEPAGES val:33 [ 24.597202] BUG: Bad rss-counter state mm:000000004d2f8dcb type:MM_ANONPAGES val:22 [ 24.693562] ================================================================== [ 24.694108] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.694704] Read of size 8 at addr ffff88800fc43a50 by task sshd/219 [ 24.695228] [ 24.695397] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.696077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.696849] Call Trace: [ 24.697102] [ 24.697324] dump_stack_lvl+0x91/0xf0 [ 24.697704] print_report+0xcc/0x620 [ 24.698087] ? __virt_addr_valid+0x102/0x340 [ 24.698516] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.699120] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.699619] kasan_report+0xbe/0xf0 [ 24.699990] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.700478] vma_interval_tree_remove+0xc75/0xec0 [ 24.700950] vma_prepare+0xc54/0x11a0 [ 24.701344] __split_vma+0x5af/0x950 [ 24.701714] ? __pfx___split_vma+0x10/0x10 [ 24.702128] ? find_held_lock+0x2c/0x110 [ 24.702555] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.703008] ? lock_is_held_type+0x9f/0x120 [ 24.703326] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.703685] ? mtree_range_walk+0x632/0x900 [ 24.704015] ? mas_walk+0x5c7/0x7c0 [ 24.704294] do_vmi_munmap+0x1f1/0x2b0 [ 24.704587] mmap_region+0x1f9/0x2660 [ 24.704870] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.705173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.705599] ? __pfx_lock_acquire+0x10/0x10 [ 24.705915] ? __pfx_mmap_region+0x10/0x10 [ 24.706229] ? security_mmap_addr+0x7d/0xa0 [ 24.706556] ? get_unmapped_area+0x1f5/0x3f0 [ 24.706885] do_mmap+0x854/0xf00 [ 24.707145] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.707437] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.707771] ksys_mmap_pgoff+0x3af/0x500 [ 24.708072] do_syscall_64+0x3f/0x90 [ 24.708354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.708740] RIP: 0033:0x7ff2c7d21d82 [ 24.709014] 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 [ 24.710270] RSP: 002b:00007ffd284859b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.710828] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff2c7d21d82 [ 24.711333] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2c715b000 [ 24.711834] RBP: 00007ff2c715b000 R08: 0000000000000009 R09: 0000000000001000 [ 24.712338] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563aea4c9f70 [ 24.712877] R13: 00007ffd284859d0 R14: 00007ffd28485a00 R15: 00007ffd28485d60 [ 24.713384] [ 24.713558] [ 24.713686] Allocated by task 212: [ 24.713940] kasan_save_stack+0x22/0x50 [ 24.714237] kasan_set_track+0x25/0x30 [ 24.714545] __kasan_slab_alloc+0x59/0x70 [ 24.714863] kmem_cache_alloc+0x16b/0x370 [ 24.715168] vm_area_dup+0x20/0x160 [ 24.715439] __split_vma+0x170/0x950 [ 24.715714] split_vma+0xc6/0x110 [ 24.715975] mprotect_fixup+0x8d2/0xb30 [ 24.716273] do_mprotect_pkey+0x87e/0xd40 [ 24.716579] __x64_sys_mprotect+0x78/0xc0 [ 24.716889] do_syscall_64+0x3f/0x90 [ 24.717172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.717555] [ 24.717683] Freed by task 19: [ 24.717910] kasan_save_stack+0x22/0x50 [ 24.718217] kasan_set_track+0x25/0x30 [ 24.718510] kasan_save_free_info+0x2b/0x50 [ 24.718836] __kasan_slab_free+0x10a/0x190 [ 24.719152] kmem_cache_free+0x10d/0x4d0 [ 24.719453] rcu_core+0x8c8/0x2860 [ 24.719716] __do_softirq+0x1b7/0x7d4 [ 24.719997] [ 24.720124] Last potentially related work creation: [ 24.720472] kasan_save_stack+0x22/0x50 [ 24.720772] __kasan_record_aux_stack+0x8e/0xa0 [ 24.721119] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.721500] remove_vma+0x139/0x170 [ 24.721768] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.722098] do_vmi_munmap+0x1f1/0x2b0 [ 24.722390] __vm_munmap+0x138/0x3a0 [ 24.722674] __x64_sys_munmap+0x59/0x80 [ 24.722967] do_syscall_64+0x3f/0x90 [ 24.723249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.723633] [ 24.723759] The buggy address belongs to the object at ffff88800fc439f8 [ 24.723759] which belongs to the cache vm_area_struct of size 168 [ 24.724631] The buggy address is located 88 bytes inside of [ 24.724631] freed 168-byte region [ffff88800fc439f8, ffff88800fc43aa0) [ 24.725473] [ 24.725602] The buggy address belongs to the physical page: [ 24.725996] page:00000000d5bc7123 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc43 [ 24.726655] memcg:ffff88800e782601 [ 24.726911] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.727323] page_type: 0xffffffff() [ 24.727590] raw: 0100000000000200 ffff88800879fc80 ffffea00003beb40 dead000000000005 [ 24.728144] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e782601 [ 24.728681] page dumped because: kasan: bad access detected [ 24.729074] [ 24.729200] Memory state around the buggy address: [ 24.729540] ffff88800fc43900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.730040] ffff88800fc43980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.730549] >ffff88800fc43a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.731051] ^ [ 24.731467] ffff88800fc43a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.731973] ffff88800fc43b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.732475] ================================================================== [ 24.733085] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.594281] BUG: Bad rss-counter state mm:0000000029152337 type:MM_FILEPAGES val:33 [ 26.595510] BUG: Bad rss-counter state mm:0000000029152337 type:MM_ANONPAGES val:22 [ 27.053257] BUG: Bad rss-counter state mm:00000000831bf9b0 type:MM_FILEPAGES val:33 [ 27.054273] BUG: Bad rss-counter state mm:00000000831bf9b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41312' (ECDSA) to the list of known hosts. 2023/06/19 23:52:48 fuzzer started 2023/06/19 23:52:48 dialing manager at localhost:44161 2023/06/19 23:52:48 checking machine... 2023/06/19 23:52:48 checking revisions... [ 27.708929] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:52:48 testing simple program... [ 27.747513] cgroup: Unknown subsys name 'net' [ 27.798728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:52:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860d0c26 RDX=1ffff110038cef1b RSI=1ffff110038cef19 RDI=ffff88801c6778d8 RBP=ffff88801c6778c8 RSP=ffff88801c677800 R8 =ffffffff860d0c2a R9 =ffff88801c6778b0 R10=0000000000038001 R11=000000000000fc0f R12=ffff88801c6778d0 R13=ffff88801c6778b8 R14=ffff88801c677c30 R15=ffff88801c677870 RIP=ffffffff811310f5 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 00007ffad1400900 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=00007ffad19b7618 CR3=00000000197a4000 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=563412feff00545000000000000080fe 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 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=00007feea90130c0 CR3=000000000d838000 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=628621efd65a61b7e540723c582594ff XMM02=000000000011f358eff9b2d0a8fce9cb XMM03=000000000011f4282c67c8bc2e329bc3 XMM04=9db40929f3a5b52300000000000ae988 XMM05=dfcdbad4f1609c3700000000001328b0 XMM06=af4e1609b28fa9fb0000000000131320 XMM07=e042d86d42eb936e00000000001232f0 XMM08=e9766f3157422723000000000011f428 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000