[ 29.976208] BUG: Bad rss-counter state mm:00000000378dad1f type:MM_FILEPAGES val:33 [ 29.977602] BUG: Bad rss-counter state mm:00000000378dad1f type:MM_ANONPAGES val:22 [ 30.089682] ================================================================== [ 30.090570] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.091496] Read of size 8 at addr ffff88801a6e23f8 by task sshd/219 [ 30.092359] [ 30.092587] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.093444] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.094447] Call Trace: [ 30.094762] [ 30.095045] dump_stack_lvl+0x91/0xf0 [ 30.095540] print_report+0xcc/0x620 [ 30.096027] ? __virt_addr_valid+0x102/0x340 [ 30.096606] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.097225] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.097842] kasan_report+0xbe/0xf0 [ 30.098318] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.098954] vma_interval_tree_remove+0xc75/0xec0 [ 30.099576] vma_prepare+0xc54/0x11a0 [ 30.100070] __split_vma+0x5af/0x950 [ 30.100565] ? __pfx___split_vma+0x10/0x10 [ 30.101118] ? find_held_lock+0x2c/0x110 [ 30.101657] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.102238] ? lock_is_held_type+0x9f/0x120 [ 30.102793] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.103421] ? mtree_range_walk+0x632/0x900 [ 30.103995] ? mas_walk+0x5c7/0x7c0 [ 30.104491] do_vmi_munmap+0x1f1/0x2b0 [ 30.105013] mmap_region+0x1f9/0x2660 [ 30.105510] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.106039] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.106780] ? __pfx_lock_acquire+0x10/0x10 [ 30.107326] ? __pfx_mmap_region+0x10/0x10 [ 30.107885] ? security_mmap_addr+0x7d/0xa0 [ 30.108436] ? get_unmapped_area+0x1f5/0x3f0 [ 30.109028] do_mmap+0x854/0xf00 [ 30.109479] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.109994] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.110570] ksys_mmap_pgoff+0x3af/0x500 [ 30.111093] do_syscall_64+0x3f/0x90 [ 30.111588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.112259] RIP: 0033:0x7fc424194d82 [ 30.112740] 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 [ 30.114931] RSP: 002b:00007ffe03a94278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.115868] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc424194d82 [ 30.116761] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4235ce000 [ 30.117637] RBP: 00007fc4235ce000 R08: 0000000000000009 R09: 0000000000001000 [ 30.118506] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e0dd9b0ec0 [ 30.119382] R13: 00007ffe03a94290 R14: 00007ffe03a942c0 R15: 00007ffe03a94620 [ 30.120273] [ 30.120582] [ 30.120803] Allocated by task 212: [ 30.121244] kasan_save_stack+0x22/0x50 [ 30.121764] kasan_set_track+0x25/0x30 [ 30.122275] __kasan_slab_alloc+0x59/0x70 [ 30.122811] kmem_cache_alloc+0x16b/0x370 [ 30.123343] vm_area_dup+0x20/0x160 [ 30.123811] __split_vma+0x170/0x950 [ 30.124293] split_vma+0xc6/0x110 [ 30.124763] mprotect_fixup+0x8d2/0xb30 [ 30.125281] do_mprotect_pkey+0x87e/0xd40 [ 30.125828] __x64_sys_mprotect+0x78/0xc0 [ 30.126366] do_syscall_64+0x3f/0x90 [ 30.126857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.127520] [ 30.127739] Freed by task 203: [ 30.128144] kasan_save_stack+0x22/0x50 [ 30.128683] kasan_set_track+0x25/0x30 [ 30.129191] kasan_save_free_info+0x2b/0x50 [ 30.129739] __kasan_slab_free+0x10a/0x190 [ 30.130290] kmem_cache_free+0x10d/0x4d0 [ 30.130815] rcu_core+0x8c8/0x2860 [ 30.131272] __do_softirq+0x1b7/0x7d4 [ 30.131765] [ 30.131987] Last potentially related work creation: [ 30.132607] kasan_save_stack+0x22/0x50 [ 30.133129] __kasan_record_aux_stack+0x8e/0xa0 [ 30.133716] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.134383] remove_vma+0x139/0x170 [ 30.134859] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.135434] do_vmi_munmap+0x1f1/0x2b0 [ 30.135942] __vm_munmap+0x138/0x3a0 [ 30.136425] __x64_sys_munmap+0x59/0x80 [ 30.136946] do_syscall_64+0x3f/0x90 [ 30.137434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.138102] [ 30.138325] The buggy address belongs to the object at ffff88801a6e23a0 [ 30.138325] which belongs to the cache vm_area_struct of size 168 [ 30.139843] The buggy address is located 88 bytes inside of [ 30.139843] freed 168-byte region [ffff88801a6e23a0, ffff88801a6e2448) [ 30.141320] [ 30.141545] The buggy address belongs to the physical page: [ 30.142230] page:000000005f464770 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a6e2 [ 30.143353] memcg:ffff888018f1fc01 [ 30.143797] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.144467] page_type: 0xffffffff() [ 30.144948] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.145899] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f1fc01 [ 30.146845] page dumped because: kasan: bad access detected [ 30.147525] [ 30.147750] Memory state around the buggy address: [ 30.148354] ffff88801a6e2280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.149250] ffff88801a6e2300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.150135] >ffff88801a6e2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.151021] ^ [ 30.151893] ffff88801a6e2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.152784] ffff88801a6e2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.153666] ================================================================== [ 30.154672] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.921292] BUG: Bad rss-counter state mm:000000001bc50890 type:MM_FILEPAGES val:33 [ 32.922284] BUG: Bad rss-counter state mm:000000001bc50890 type:MM_ANONPAGES val:22 [ 33.475506] BUG: Bad rss-counter state mm:00000000a4ec81c8 type:MM_FILEPAGES val:33 [ 33.476686] BUG: Bad rss-counter state mm:00000000a4ec81c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15482' (ECDSA) to the list of known hosts. 2023/06/20 21:46:03 fuzzer started 2023/06/20 21:46:03 dialing manager at localhost:36067 2023/06/20 21:46:03 checking machine... 2023/06/20 21:46:03 checking revisions... [ 34.164763] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:46:04 testing simple program... [ 34.208492] cgroup: Unknown subsys name 'net' [ 34.245126] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:46:03 Registers: info registers vcpu 0 RAX=ffff888016110d78 RBX=ffff88800ca59180 RCX=1ffff11001a513b1 RDX=dffffc0000000000 RSI=ffffffff87b89f80 RDI=ffff88800d289d88 RBP=ffff888016110260 RSP=ffff88806ce09d98 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=0000000000000000 R12=0000000000000283 R13=ffff8880161102c8 R14=ffff88800d289d78 R15=ffffffff87b89f80 RIP=ffffffff844d2239 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=00007feef6014360 CR3=000000000f288000 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=3869e6c74f1e0e97374c2e55ebfdb9af XMM02=000000000011b2b8d59e07bde36eea69 XMM03=000000000011b3e0ec2efd57dc4c00df XMM04=d82314fcb15f0c6300000000000ae988 XMM05=36d3ecde82cd744a0000000000132a10 XMM06=dfcdbad4f1609c370000000000131558 XMM07=fb795ef6d657705600000000001216c8 XMM08=2c67c8bc2e329bc3000000000011b3e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8614dcdb RBX=0000000000000001 RCX=ffffffff8614dcd6 RDX=0000000000000002 RSI=0000000000000003 RDI=ffffffff85e0bef8 RBP=ffff88800ead75d0 RSP=ffff88800ead7508 R8 =ffffffff8614dcd6 R9 =ffff88800ead75b8 R10=0000000000038001 R11=000000000002454d R12=ffff88800ead75d8 R13=ffff88800ead75c0 R14=ffff88800ead75b9 R15=ffff88800ead7578 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 00007f12e30d5700 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=00007f3c364920b0 CR3=000000001000a000 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=2033303a36343a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a36343a3132203032 XMM08=00007f12d800d6300000007700000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000