[ 25.334134] BUG: Bad rss-counter state mm:00000000a6920b9f type:MM_FILEPAGES val:33 [ 25.334788] BUG: Bad rss-counter state mm:00000000a6920b9f type:MM_ANONPAGES val:22 [ 25.474425] ================================================================== [ 25.475511] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.476636] Read of size 8 at addr ffff88800ea90968 by task sshd/218 [ 25.477708] [ 25.477963] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.478964] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.480108] Call Trace: [ 25.480520] [ 25.480856] dump_stack_lvl+0x91/0xf0 [ 25.481384] print_report+0xcc/0x620 [ 25.481861] ? __virt_addr_valid+0x102/0x340 [ 25.482414] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.483022] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.483626] kasan_report+0xbe/0xf0 [ 25.484095] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.484713] vma_interval_tree_remove+0xc75/0xec0 [ 25.485306] vma_prepare+0xc54/0x11a0 [ 25.485773] __split_vma+0x5af/0x950 [ 25.486236] ? __pfx___split_vma+0x10/0x10 [ 25.486751] ? find_held_lock+0x2c/0x110 [ 25.487264] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.487817] ? lock_is_held_type+0x9f/0x120 [ 25.488346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.488971] ? mtree_range_walk+0x632/0x900 [ 25.489560] ? mas_walk+0x5c7/0x7c0 [ 25.490042] do_vmi_munmap+0x1f1/0x2b0 [ 25.490551] mmap_region+0x1f9/0x2660 [ 25.491033] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.491548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.492255] ? __pfx_lock_acquire+0x10/0x10 [ 25.492799] ? __pfx_mmap_region+0x10/0x10 [ 25.493321] ? security_mmap_addr+0x7d/0xa0 [ 25.493845] ? get_unmapped_area+0x1f5/0x3f0 [ 25.494399] do_mmap+0x854/0xf00 [ 25.494830] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.495316] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.495871] ksys_mmap_pgoff+0x3af/0x500 [ 25.496382] do_syscall_64+0x3f/0x90 [ 25.496855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.497494] RIP: 0033:0x7feedd04ed82 [ 25.497943] 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 [ 25.500024] RSP: 002b:00007ffc48d55798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.500924] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feedd04ed82 [ 25.501776] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feedc488000 [ 25.502617] RBP: 00007feedc488000 R08: 0000000000000009 R09: 0000000000001000 [ 25.503462] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563a1ae57ec0 [ 25.504298] R13: 00007ffc48d557b0 R14: 00007ffc48d557e0 R15: 00007ffc48d55b40 [ 25.505165] [ 25.505451] [ 25.505666] Allocated by task 211: [ 25.506091] kasan_save_stack+0x22/0x50 [ 25.506593] kasan_set_track+0x25/0x30 [ 25.507079] __kasan_slab_alloc+0x59/0x70 [ 25.507601] kmem_cache_alloc+0x16b/0x370 [ 25.508110] vm_area_dup+0x20/0x160 [ 25.508568] __split_vma+0x170/0x950 [ 25.509029] split_vma+0xc6/0x110 [ 25.509467] mprotect_fixup+0x8d2/0xb30 [ 25.509960] do_mprotect_pkey+0x87e/0xd40 [ 25.510472] __x64_sys_mprotect+0x78/0xc0 [ 25.510988] do_syscall_64+0x3f/0x90 [ 25.511452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.512086] [ 25.512298] Freed by task 211: [ 25.512690] kasan_save_stack+0x22/0x50 [ 25.513192] kasan_set_track+0x25/0x30 [ 25.513676] kasan_save_free_info+0x2b/0x50 [ 25.514204] __kasan_slab_free+0x10a/0x190 [ 25.514725] kmem_cache_free+0x10d/0x4d0 [ 25.515225] rcu_core+0x8c8/0x2860 [ 25.515662] __do_softirq+0x1b7/0x7d4 [ 25.516137] [ 25.516351] Last potentially related work creation: [ 25.516943] kasan_save_stack+0x22/0x50 [ 25.517445] __kasan_record_aux_stack+0x8e/0xa0 [ 25.518019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.518723] remove_vma+0x139/0x170 [ 25.519170] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.519721] do_vmi_munmap+0x1f1/0x2b0 [ 25.520200] __vm_munmap+0x138/0x3a0 [ 25.520672] __x64_sys_munmap+0x59/0x80 [ 25.521161] do_syscall_64+0x3f/0x90 [ 25.521626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.522258] [ 25.522477] The buggy address belongs to the object at ffff88800ea90910 [ 25.522477] which belongs to the cache vm_area_struct of size 168 [ 25.523916] The buggy address is located 88 bytes inside of [ 25.523916] freed 168-byte region [ffff88800ea90910, ffff88800ea909b8) [ 25.525308] [ 25.525523] The buggy address belongs to the physical page: [ 25.526178] page:00000000a25789b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea90 [ 25.527252] memcg:ffff8880145d8501 [ 25.527672] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.528312] page_type: 0xffffffff() [ 25.528775] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 25.529675] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880145d8501 [ 25.530578] page dumped because: kasan: bad access detected [ 25.531230] [ 25.531447] Memory state around the buggy address: [ 25.532021] ffff88800ea90800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 25.532883] ffff88800ea90880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 25.533737] >ffff88800ea90900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.534582] ^ [ 25.535360] ffff88800ea90980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 25.536216] ffff88800ea90a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.537064] ================================================================== [ 25.538007] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.844969] BUG: Bad rss-counter state mm:00000000242883d1 type:MM_FILEPAGES val:33 [ 27.845727] BUG: Bad rss-counter state mm:00000000242883d1 type:MM_ANONPAGES val:22 [ 28.279233] BUG: Bad rss-counter state mm:00000000ae5adfc8 type:MM_FILEPAGES val:33 [ 28.280325] BUG: Bad rss-counter state mm:00000000ae5adfc8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34007' (ECDSA) to the list of known hosts. 2023/06/19 22:33:05 fuzzer started 2023/06/19 22:33:05 dialing manager at localhost:44161 2023/06/19 22:33:05 checking machine... 2023/06/19 22:33:05 checking revisions... [ 28.963264] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:33:05 testing simple program... [ 29.012684] cgroup: Unknown subsys name 'net' [ 29.077329] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:33:03 Registers: info registers vcpu 0 RAX=ffffffff8129ea74 RBX=ffff888008d87dc0 RCX=ffffffff812e00e5 RDX=1ffffffff0ac3015 RSI=0000000000000004 RDI=ffff888008d87c98 RBP=ffffffff85618098 RSP=ffff888008d87d10 R8 =0000000000000001 R9 =ffffed10011b0f93 R10=0000000000000003 R11=0000000000000000 R12=0000000000000287 R13=ffffffff856180d8 R14=ffff888008d71b40 R15=ffff888008d87dd0 RIP=ffffffff8452fd43 RFL=00000086 [--S--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=00007ffffa91dbd8 CR3=0000000014756000 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=2034303a33333a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a33333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800844f780 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801343f101 RSI=ffff88801343f170 RDI=ffff88801343f170 RBP=ffff88801343f130 RSP=ffff88801343f018 R8 =0000000000000001 R9 =ffff88801343f118 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801343f138 R13=ffff88801343f120 R14=ffff88801343f170 R15=ffff88801343f0d8 RIP=ffffffff81131236 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 00007f2fdeb7d900 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=00007f2fdf134618 CR3=0000000016b28000 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=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