[ 23.868609] BUG: Bad rss-counter state mm:0000000039e2c74d type:MM_FILEPAGES val:33 [ 23.869511] BUG: Bad rss-counter state mm:0000000039e2c74d type:MM_ANONPAGES val:22 [ 24.031362] ================================================================== [ 24.032331] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.033294] Read of size 8 at addr ffff88800ebf7d08 by task sshd/219 [ 24.034188] [ 24.034415] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.035306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.036349] Call Trace: [ 24.036682] [ 24.036973] dump_stack_lvl+0x91/0xf0 [ 24.037491] print_report+0xcc/0x620 [ 24.037989] ? __virt_addr_valid+0x102/0x340 [ 24.038563] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.039200] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.039853] kasan_report+0xbe/0xf0 [ 24.040343] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.040990] vma_interval_tree_remove+0xc75/0xec0 [ 24.041615] vma_prepare+0xc54/0x11a0 [ 24.042110] __split_vma+0x5af/0x950 [ 24.042597] ? __pfx___split_vma+0x10/0x10 [ 24.043143] ? find_held_lock+0x2c/0x110 [ 24.043681] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.044428] ? lock_is_held_type+0x9f/0x120 [ 24.045016] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.045654] ? mtree_range_walk+0x632/0x900 [ 24.046235] ? mas_walk+0x5c7/0x7c0 [ 24.046731] do_vmi_munmap+0x1f1/0x2b0 [ 24.047254] mmap_region+0x1f9/0x2660 [ 24.047788] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.048337] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.049091] ? __pfx_lock_acquire+0x10/0x10 [ 24.049649] ? __pfx_mmap_region+0x10/0x10 [ 24.050204] ? security_mmap_addr+0x7d/0xa0 [ 24.050755] ? get_unmapped_area+0x1f5/0x3f0 [ 24.051328] do_mmap+0x854/0xf00 [ 24.051796] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.052313] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.052901] ksys_mmap_pgoff+0x3af/0x500 [ 24.053439] do_syscall_64+0x3f/0x90 [ 24.053940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.054616] RIP: 0033:0x7f24b4783d82 [ 24.055095] 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 [ 24.057355] RSP: 002b:00007ffd826e8ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.058309] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f24b4783d82 [ 24.059195] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f24b3bbd000 [ 24.060108] RBP: 00007f24b3bbd000 R08: 0000000000000009 R09: 0000000000001000 [ 24.060994] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f1809c980 [ 24.061884] R13: 00007ffd826e8d00 R14: 00007ffd826e8d30 R15: 00007ffd826e9090 [ 24.062784] [ 24.063090] [ 24.063315] Allocated by task 212: [ 24.063768] kasan_save_stack+0x22/0x50 [ 24.064297] kasan_set_track+0x25/0x30 [ 24.064814] __kasan_slab_alloc+0x59/0x70 [ 24.065370] kmem_cache_alloc+0x16b/0x370 [ 24.065902] vm_area_dup+0x20/0x160 [ 24.066357] __split_vma+0x170/0x950 [ 24.066825] split_vma+0xc6/0x110 [ 24.067269] mprotect_fixup+0x8d2/0xb30 [ 24.067793] do_mprotect_pkey+0x87e/0xd40 [ 24.068320] __x64_sys_mprotect+0x78/0xc0 [ 24.068843] do_syscall_64+0x3f/0x90 [ 24.069318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.069965] [ 24.070184] Freed by task 212: [ 24.070582] kasan_save_stack+0x22/0x50 [ 24.071084] kasan_set_track+0x25/0x30 [ 24.071581] kasan_save_free_info+0x2b/0x50 [ 24.072115] __kasan_slab_free+0x10a/0x190 [ 24.072648] kmem_cache_free+0x10d/0x4d0 [ 24.073157] rcu_core+0x8c8/0x2860 [ 24.073626] __do_softirq+0x1b7/0x7d4 [ 24.074117] [ 24.074334] Last potentially related work creation: [ 24.074921] kasan_save_stack+0x22/0x50 [ 24.075441] __kasan_record_aux_stack+0x8e/0xa0 [ 24.076039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.076700] remove_vma+0x139/0x170 [ 24.077154] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.077722] do_vmi_munmap+0x1f1/0x2b0 [ 24.078209] __vm_munmap+0x138/0x3a0 [ 24.078686] __x64_sys_munmap+0x59/0x80 [ 24.079187] do_syscall_64+0x3f/0x90 [ 24.079665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.080320] [ 24.080536] Second to last potentially related work creation: [ 24.081234] kasan_save_stack+0x22/0x50 [ 24.081749] __kasan_record_aux_stack+0x8e/0xa0 [ 24.082324] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.082981] remove_vma+0x139/0x170 [ 24.083456] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.084046] do_vmi_munmap+0x1f1/0x2b0 [ 24.084554] mmap_region+0x1f9/0x2660 [ 24.085057] do_mmap+0x854/0xf00 [ 24.085513] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.086024] ksys_mmap_pgoff+0x3af/0x500 [ 24.086551] do_syscall_64+0x3f/0x90 [ 24.087051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.087729] [ 24.087973] The buggy address belongs to the object at ffff88800ebf7cb0 [ 24.087973] which belongs to the cache vm_area_struct of size 168 [ 24.089529] The buggy address is located 88 bytes inside of [ 24.089529] freed 168-byte region [ffff88800ebf7cb0, ffff88800ebf7d58) [ 24.091026] [ 24.091252] The buggy address belongs to the physical page: [ 24.091988] page:00000000e1e5afcb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebf7 [ 24.093141] memcg:ffff88800c509f01 [ 24.093600] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.094295] page_type: 0xffffffff() [ 24.094778] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380240 dead000000000004 [ 24.095779] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c509f01 [ 24.096846] page dumped because: kasan: bad access detected [ 24.097548] [ 24.097775] Memory state around the buggy address: [ 24.098389] ffff88800ebf7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.099306] ffff88800ebf7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.100219] >ffff88800ebf7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.101123] ^ [ 24.101593] ffff88800ebf7d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.102498] ffff88800ebf7e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.103408] ================================================================== [ 24.104609] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.405052] BUG: Bad rss-counter state mm:00000000797f399f type:MM_FILEPAGES val:33 [ 26.406255] BUG: Bad rss-counter state mm:00000000797f399f type:MM_ANONPAGES val:22 [ 26.890447] BUG: Bad rss-counter state mm:00000000f00c3528 type:MM_FILEPAGES val:33 [ 26.891619] BUG: Bad rss-counter state mm:00000000f00c3528 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12026' (ECDSA) to the list of known hosts. 2023/06/20 20:19:52 fuzzer started 2023/06/20 20:19:52 dialing manager at localhost:36067 2023/06/20 20:19:52 checking machine... 2023/06/20 20:19:52 checking revisions... [ 27.495284] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:19:52 testing simple program... [ 27.529717] cgroup: Unknown subsys name 'net' [ 27.616295] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:19:52 Registers: info registers vcpu 0 RAX=ffffffff86413625 RBX=0000000000000001 RCX=ffffffff86413620 RDX=0000000000000002 RSI=0000000000000005 RDI=ffffffff85fe4fd4 RBP=ffff88801021f900 RSP=ffff88801021f838 R8 =ffffffff86413620 R9 =ffff88801021f8e8 R10=0000000000038001 R11=000000000009a984 R12=ffff88801021f908 R13=ffff88801021f8f0 R14=ffff88801021f8e9 R15=ffff88801021f8a8 RIP=ffffffff81130a7e 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 00007f7631cd0900 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=00007f7632285650 CR3=000000000f600000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fd399cf5f70 CR3=000000000cc88000 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=b7855d127e248789a04dd2cb061f73df XMM02=ec2efd57dc4c00df000000000011d660 XMM03=7774fb035c6e1d7e000000000011d730 XMM04=6b39349cffb67e1100000000000ae988 XMM05=73442833bb650e220000000000133648 XMM06=806171799158d9670000000000132378 XMM07=e042d86d42eb936e0000000000121590 XMM08=7774fb035c6e1d7e000000000011d730 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000