[ 36.314021] BUG: Bad rss-counter state mm:000000007d8b93ca type:MM_FILEPAGES val:33 [ 36.315229] BUG: Bad rss-counter state mm:000000007d8b93ca type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.465880] ================================================================== [ 36.466810] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.467740] Read of size 8 at addr ffff88800d7f0058 by task sshd/220 [ 36.468632] [ 36.468885] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.469765] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.470750] Call Trace: [ 36.471096] [ 36.471383] dump_stack_lvl+0x91/0xf0 [ 36.471865] print_report+0xcc/0x620 [ 36.472340] ? __virt_addr_valid+0x102/0x340 [ 36.472903] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.473535] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.474154] kasan_report+0xbe/0xf0 [ 36.474625] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.475254] vma_interval_tree_remove+0xc75/0xec0 [ 36.475852] vma_prepare+0xc54/0x11a0 [ 36.476327] __split_vma+0x5af/0x950 [ 36.476798] ? __pfx___split_vma+0x10/0x10 [ 36.477343] ? find_held_lock+0x2c/0x110 [ 36.477860] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.478421] ? lock_is_held_type+0x9f/0x120 [ 36.478952] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.479558] ? mtree_range_walk+0x632/0x900 [ 36.480105] ? mas_walk+0x5c7/0x7c0 [ 36.480578] do_vmi_munmap+0x1f1/0x2b0 [ 36.481072] mmap_region+0x1f9/0x2660 [ 36.481568] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.482079] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.482791] ? __pfx_lock_acquire+0x10/0x10 [ 36.483334] ? __pfx_mmap_region+0x10/0x10 [ 36.483867] ? security_mmap_addr+0x7d/0xa0 [ 36.484396] ? get_unmapped_area+0x1f5/0x3f0 [ 36.484957] do_mmap+0x854/0xf00 [ 36.485414] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.485911] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.486475] ksys_mmap_pgoff+0x3af/0x500 [ 36.486982] do_syscall_64+0x3f/0x90 [ 36.487459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.488101] RIP: 0033:0x7fc5935cfd82 [ 36.488556] 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 [ 36.490698] RSP: 002b:00007ffe7c104e78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.491610] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5935cfd82 [ 36.492464] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc592a09000 [ 36.493320] RBP: 00007fc592a09000 R08: 0000000000000009 R09: 0000000000001000 [ 36.494173] R10: 0000000000000812 R11: 0000000000000206 R12: 000055faf196dd90 [ 36.495020] R13: 00007ffe7c104e90 R14: 00007ffe7c104ec0 R15: 00007ffe7c105220 [ 36.495886] [ 36.496182] [ 36.496398] Allocated by task 213: [ 36.496825] kasan_save_stack+0x22/0x50 [ 36.497350] kasan_set_track+0x25/0x30 [ 36.497844] __kasan_slab_alloc+0x59/0x70 [ 36.498378] kmem_cache_alloc+0x16b/0x370 [ 36.498894] vm_area_dup+0x20/0x160 [ 36.499354] __split_vma+0x170/0x950 [ 36.499822] split_vma+0xc6/0x110 [ 36.500263] mprotect_fixup+0x8d2/0xb30 [ 36.500773] do_mprotect_pkey+0x87e/0xd40 [ 36.501307] __x64_sys_mprotect+0x78/0xc0 [ 36.501830] do_syscall_64+0x3f/0x90 [ 36.502306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.502947] [ 36.503162] Freed by task 204: [ 36.503554] kasan_save_stack+0x22/0x50 [ 36.504057] kasan_set_track+0x25/0x30 [ 36.504546] kasan_save_free_info+0x2b/0x50 [ 36.505075] __kasan_slab_free+0x10a/0x190 [ 36.505616] kmem_cache_free+0x10d/0x4d0 [ 36.506122] rcu_core+0x8c8/0x2860 [ 36.506571] __do_softirq+0x1b7/0x7d4 [ 36.507046] [ 36.507263] Last potentially related work creation: [ 36.507843] kasan_save_stack+0x22/0x50 [ 36.508356] __kasan_record_aux_stack+0x8e/0xa0 [ 36.508931] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.509650] remove_vma+0x139/0x170 [ 36.510104] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.510658] do_vmi_munmap+0x1f1/0x2b0 [ 36.511145] __vm_munmap+0x138/0x3a0 [ 36.511616] __x64_sys_munmap+0x59/0x80 [ 36.512107] do_syscall_64+0x3f/0x90 [ 36.512583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.513235] [ 36.513452] The buggy address belongs to the object at ffff88800d7f0000 [ 36.513452] which belongs to the cache vm_area_struct of size 168 [ 36.514927] The buggy address is located 88 bytes inside of [ 36.514927] freed 168-byte region [ffff88800d7f0000, ffff88800d7f00a8) [ 36.516330] [ 36.516544] The buggy address belongs to the physical page: [ 36.517224] page:000000002c90f647 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7f0 [ 36.518311] memcg:ffff88800d441201 [ 36.518746] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.519392] page_type: 0xffffffff() [ 36.519837] raw: 0100000000000200 ffff88800879fc80 ffffea0000399740 dead000000000002 [ 36.520758] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d441201 [ 36.521678] page dumped because: kasan: bad access detected [ 36.522350] [ 36.522565] Memory state around the buggy address: [ 36.523154] ffff88800d7eff00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 36.524018] ffff88800d7eff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.524875] >ffff88800d7f0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.525740] ^ [ 36.526465] ffff88800d7f0080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 36.527331] ffff88800d7f0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.528181] ================================================================== [ 36.529114] Disabling lock debugging due to kernel taint [ 38.441853] BUG: Bad rss-counter state mm:000000006ad7194a type:MM_FILEPAGES val:33 [ 38.443389] BUG: Bad rss-counter state mm:000000006ad7194a type:MM_ANONPAGES val:22 [ 38.906506] BUG: Bad rss-counter state mm:0000000074244c6a type:MM_FILEPAGES val:33 [ 38.907705] BUG: Bad rss-counter state mm:0000000074244c6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37291' (ECDSA) to the list of known hosts. 2023/06/19 15:33:30 fuzzer started 2023/06/19 15:33:31 dialing manager at localhost:44161 2023/06/19 15:33:31 checking machine... 2023/06/19 15:33:31 checking revisions... [ 39.643245] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:33:31 testing simple program... [ 39.691282] cgroup: Unknown subsys name 'net' [ 39.732605] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:33:25 Registers: info registers vcpu 0 RAX=00007efc4171ba9e RBX=00007efc4171ba9e RCX=0000000000000000 RDX=0000000000000000 RSI=00007efc4171ba9e RDI=00007fff54892e70 RBP=00007fff54892e60 RSP=00007fff54892910 R8 =0000000000000000 R9 =000000000000001b R10=00007fff54892e27 R11=0000000000000000 R12=00007fff54892e70 R13=00007efc4171ba84 R14=00007fff54892fb0 R15=00007efc4119fba0 RIP=00007efc4104a3e5 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efc40bec900 00000000 00000000 GS =0000 0000000000000000 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=00007efc411a40b0 CR3=000000000c55c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=7465675f6c697475646f6d6d61705f00 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=00007ffc46350bf8 CR3=000000000e45e000 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=2030333a33333a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a33333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000