syzkaller login: [ 40.411897] BUG: Bad rss-counter state mm:000000002b2ff246 type:MM_FILEPAGES val:33 [ 40.413090] BUG: Bad rss-counter state mm:000000002b2ff246 type:MM_ANONPAGES val:22 [ 40.452035] ================================================================== [ 40.452924] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.453862] Read of size 8 at addr ffff88800eefe058 by task sshd/220 [ 40.454623] [ 40.454839] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.455719] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.456683] Call Trace: [ 40.456999] [ 40.457286] dump_stack_lvl+0x91/0xf0 [ 40.457772] print_report+0xcc/0x620 [ 40.458262] ? __virt_addr_valid+0x102/0x340 [ 40.458812] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.459447] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.460054] kasan_report+0xbe/0xf0 [ 40.460524] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.461140] vma_interval_tree_remove+0xc75/0xec0 [ 40.461736] vma_prepare+0xc54/0x11a0 [ 40.462306] __split_vma+0x5af/0x950 [ 40.462784] ? __pfx___split_vma+0x10/0x10 [ 40.463352] ? find_held_lock+0x2c/0x110 [ 40.463882] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.464462] ? lock_is_held_type+0x9f/0x120 [ 40.465002] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.465599] ? mtree_range_walk+0x632/0x900 [ 40.466151] ? mas_walk+0x5c7/0x7c0 [ 40.466614] do_vmi_munmap+0x1f1/0x2b0 [ 40.467093] mmap_region+0x1f9/0x2660 [ 40.467571] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.468073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.468822] ? __pfx_lock_acquire+0x10/0x10 [ 40.469359] ? __pfx_mmap_region+0x10/0x10 [ 40.469886] ? security_mmap_addr+0x7d/0xa0 [ 40.470417] ? get_unmapped_area+0x1f5/0x3f0 [ 40.470973] do_mmap+0x854/0xf00 [ 40.471429] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.471934] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.472495] ksys_mmap_pgoff+0x3af/0x500 [ 40.473003] do_syscall_64+0x3f/0x90 [ 40.473493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.474134] RIP: 0033:0x7fc22cb1ad82 [ 40.474598] 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 [ 40.476781] RSP: 002b:00007fffe3834518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.477714] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc22cb1ad82 [ 40.478584] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc22bf54000 [ 40.479490] RBP: 00007fc22bf54000 R08: 0000000000000009 R09: 0000000000001000 [ 40.480356] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555979ddcec0 [ 40.481207] R13: 00007fffe3834530 R14: 00007fffe3834560 R15: 00007fffe38348c0 [ 40.482067] [ 40.482363] [ 40.482577] Allocated by task 213: [ 40.483014] kasan_save_stack+0x22/0x50 [ 40.483536] kasan_set_track+0x25/0x30 [ 40.484051] __kasan_slab_alloc+0x59/0x70 [ 40.484585] kmem_cache_alloc+0x16b/0x370 [ 40.485101] vm_area_dup+0x20/0x160 [ 40.485564] __split_vma+0x170/0x950 [ 40.486033] split_vma+0xc6/0x110 [ 40.486467] mprotect_fixup+0x8d2/0xb30 [ 40.486964] do_mprotect_pkey+0x87e/0xd40 [ 40.487516] __x64_sys_mprotect+0x78/0xc0 [ 40.488036] do_syscall_64+0x3f/0x90 [ 40.488514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.489168] [ 40.489384] Freed by task 213: [ 40.489793] kasan_save_stack+0x22/0x50 [ 40.490310] kasan_set_track+0x25/0x30 [ 40.490811] kasan_save_free_info+0x2b/0x50 [ 40.491379] __kasan_slab_free+0x10a/0x190 [ 40.491916] kmem_cache_free+0x10d/0x4d0 [ 40.492414] rcu_core+0x8c8/0x2860 [ 40.492854] __do_softirq+0x1b7/0x7d4 [ 40.493325] [ 40.493542] Last potentially related work creation: [ 40.494124] kasan_save_stack+0x22/0x50 [ 40.494624] __kasan_record_aux_stack+0x8e/0xa0 [ 40.495206] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.495881] remove_vma+0x139/0x170 [ 40.496341] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.496923] do_vmi_munmap+0x1f1/0x2b0 [ 40.497424] __vm_munmap+0x138/0x3a0 [ 40.497911] __x64_sys_munmap+0x59/0x80 [ 40.498413] do_syscall_64+0x3f/0x90 [ 40.498895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.499558] [ 40.499773] The buggy address belongs to the object at ffff88800eefe000 [ 40.499773] which belongs to the cache vm_area_struct of size 168 [ 40.501246] The buggy address is located 88 bytes inside of [ 40.501246] freed 168-byte region [ffff88800eefe000, ffff88800eefe0a8) [ 40.502664] [ 40.502878] The buggy address belongs to the physical page: [ 40.503556] page:00000000659d1397 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeefe [ 40.504629] memcg:ffff88800ebaf501 [ 40.505054] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.505694] page_type: 0xffffffff() [ 40.506138] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.507051] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebaf501 [ 40.507957] page dumped because: kasan: bad access detected [ 40.508613] [ 40.508827] Memory state around the buggy address: [ 40.509411] ffff88800eefdf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 40.510263] ffff88800eefdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.511117] >ffff88800eefe000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.511980] ^ [ 40.512703] ffff88800eefe080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 40.513555] ffff88800eefe100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.514396] ================================================================== [ 40.515370] Disabling lock debugging due to kernel taint [ 42.383179] BUG: Bad rss-counter state mm:0000000012b17317 type:MM_FILEPAGES val:33 [ 42.384749] BUG: Bad rss-counter state mm:0000000012b17317 type:MM_ANONPAGES val:22 [ 42.865603] BUG: Bad rss-counter state mm:0000000094684485 type:MM_FILEPAGES val:33 [ 42.866878] BUG: Bad rss-counter state mm:0000000094684485 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33405' (ECDSA) to the list of known hosts. 2023/06/19 13:43:27 fuzzer started 2023/06/19 13:43:27 dialing manager at localhost:44161 2023/06/19 13:43:27 checking machine... 2023/06/19 13:43:27 checking revisions... [ 43.574662] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:43:28 testing simple program... [ 43.623987] cgroup: Unknown subsys name 'net' [ 43.668257] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:43:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c78c800 RCX=ffff88800879fc80 RDX=ffffea000066f7c0 RSI=ffff888016a56e58 RDI=ffff88800879fdc0 RBP=0000000000000000 RSP=ffff888019847a38 R8 =ffff888019bdfbc8 R9 =0000000000000000 R10=ffffea00005a9580 R11=0000000080120005 R12=dffffc0000000000 R13=ffff888019847a78 R14=ffff88800879fc80 R15=ffff888016a56e58 RIP=ffffffff81810196 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 00007f32bed6b900 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=00007ffe3da65000 CR3=000000000c5ba000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007fab0ab13170 CR3=000000000e1e0000 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=2037323a33343a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a33343a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000