[ 53.665266] BUG: Bad rss-counter state mm:00000000438ac0aa type:MM_FILEPAGES val:33 [ 53.665988] BUG: Bad rss-counter state mm:00000000438ac0aa type:MM_ANONPAGES val:22 [ 53.780267] ================================================================== [ 53.781378] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 53.782551] Read of size 8 at addr ffff88801b91dd08 by task sshd/221 [ 53.783495] [ 53.783769] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 53.785231] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 53.786466] Call Trace: [ 53.786872] [ 53.787229] dump_stack_lvl+0x91/0xf0 [ 53.787824] print_report+0xcc/0x620 [ 53.788410] ? __virt_addr_valid+0x102/0x340 [ 53.789080] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.789828] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.790593] kasan_report+0xbe/0xf0 [ 53.791177] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.791930] vma_interval_tree_remove+0xc75/0xec0 [ 53.792663] vma_prepare+0xc54/0x11a0 [ 53.793248] __split_vma+0x5af/0x950 [ 53.793827] ? __pfx___split_vma+0x10/0x10 [ 53.794484] ? find_held_lock+0x2c/0x110 [ 53.795119] do_vmi_align_munmap+0x2ba/0x11f0 [ 53.795818] ? lock_is_held_type+0x9f/0x120 [ 53.796475] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 53.797216] ? mtree_range_walk+0x632/0x900 [ 53.797891] ? mas_walk+0x5c7/0x7c0 [ 53.798503] do_vmi_munmap+0x1f1/0x2b0 [ 53.799062] mmap_region+0x1f9/0x2660 [ 53.799334] ? vm_mmap_pgoff+0x15c/0x3a0 [ 53.799630] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 53.800039] ? __pfx_lock_acquire+0x10/0x10 [ 53.800345] ? __pfx_mmap_region+0x10/0x10 [ 53.800650] ? security_mmap_addr+0x7d/0xa0 [ 53.800956] ? get_unmapped_area+0x1f5/0x3f0 [ 53.801273] do_mmap+0x854/0xf00 [ 53.801524] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.801809] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 53.802138] ksys_mmap_pgoff+0x3af/0x500 [ 53.802426] do_syscall_64+0x3f/0x90 [ 53.802697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.803069] RIP: 0033:0x7fbcc44fed82 [ 53.803327] 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 [ 53.804564] RSP: 002b:00007fff2a6ab908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 53.805085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbcc44fed82 [ 53.805571] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbcc3938000 [ 53.806058] RBP: 00007fbcc3938000 R08: 0000000000000009 R09: 0000000000001000 [ 53.806552] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d686357f70 [ 53.807038] R13: 00007fff2a6ab920 R14: 00007fff2a6ab950 R15: 00007fff2a6abcb0 [ 53.807527] [ 53.807693] [ 53.807817] Allocated by task 212: [ 53.808064] kasan_save_stack+0x22/0x50 [ 53.808351] kasan_set_track+0x25/0x30 [ 53.808632] __kasan_slab_alloc+0x59/0x70 [ 53.808930] kmem_cache_alloc+0x16b/0x370 [ 53.809223] vm_area_dup+0x20/0x160 [ 53.809486] __split_vma+0x170/0x950 [ 53.809752] split_vma+0xc6/0x110 [ 53.810001] mprotect_fixup+0x8d2/0xb30 [ 53.810301] do_mprotect_pkey+0x87e/0xd40 [ 53.810598] __x64_sys_mprotect+0x78/0xc0 [ 53.810895] do_syscall_64+0x3f/0x90 [ 53.811165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.811531] [ 53.811652] Freed by task 212: [ 53.811877] kasan_save_stack+0x22/0x50 [ 53.812164] kasan_set_track+0x25/0x30 [ 53.812450] kasan_save_free_info+0x2b/0x50 [ 53.812757] __kasan_slab_free+0x10a/0x190 [ 53.813062] kmem_cache_free+0x10d/0x4d0 [ 53.813350] rcu_core+0x8c8/0x2860 [ 53.813601] __do_softirq+0x1b7/0x7d4 [ 53.813877] [ 53.813999] Last potentially related work creation: [ 53.814336] kasan_save_stack+0x22/0x50 [ 53.814623] __kasan_record_aux_stack+0x8e/0xa0 [ 53.814951] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.815321] remove_vma+0x139/0x170 [ 53.815576] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.815899] do_vmi_munmap+0x1f1/0x2b0 [ 53.816177] __vm_munmap+0x138/0x3a0 [ 53.816440] __x64_sys_munmap+0x59/0x80 [ 53.816723] do_syscall_64+0x3f/0x90 [ 53.816992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.817356] [ 53.817479] The buggy address belongs to the object at ffff88801b91dcb0 [ 53.817479] which belongs to the cache vm_area_struct of size 168 [ 53.818334] The buggy address is located 88 bytes inside of [ 53.818334] freed 168-byte region [ffff88801b91dcb0, ffff88801b91dd58) [ 53.819144] [ 53.819267] The buggy address belongs to the physical page: [ 53.819646] page:000000009abe21e1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b91d [ 53.820274] memcg:ffff88801b90c401 [ 53.820518] flags: 0x100000000000200(slab|node=0|zone=1) [ 53.820891] page_type: 0xffffffff() [ 53.821149] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 53.821679] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b90c401 [ 53.822214] page dumped because: kasan: bad access detected [ 53.822588] [ 53.822709] Memory state around the buggy address: [ 53.823037] ffff88801b91dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 53.823526] ffff88801b91dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 53.824021] >ffff88801b91dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 53.824510] ^ [ 53.824760] ffff88801b91dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 53.825326] ffff88801b91de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 53.825813] ================================================================== [ 53.826338] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 55.687588] BUG: Bad rss-counter state mm:00000000f9003cb3 type:MM_FILEPAGES val:33 [ 55.688503] BUG: Bad rss-counter state mm:00000000f9003cb3 type:MM_ANONPAGES val:22 [ 56.210481] BUG: Bad rss-counter state mm:00000000c2c48981 type:MM_FILEPAGES val:33 [ 56.211633] BUG: Bad rss-counter state mm:00000000c2c48981 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46605' (ECDSA) to the list of known hosts. 2023/06/20 02:38:03 fuzzer started 2023/06/20 02:38:03 dialing manager at localhost:44161 2023/06/20 02:38:03 checking machine... 2023/06/20 02:38:03 checking revisions... [ 56.851356] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:38:03 testing simple program... [ 56.904082] cgroup: Unknown subsys name 'net' [ 56.957212] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:37:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800b54b910 RCX=ffffffff8196d185 RDX=ffff88800ff28000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800b54b970 RSP=ffff888016c7f770 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000005 R11=0000000000000000 R12=0000000000000005 R13=0000000000800000 R14=ffff8880162f0c98 R15=ffff888016c7f8c0 RIP=ffffffff814c01fc RFL=00000246 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f50e582f900 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=00007f50e4ca3e20 CR3=000000000cb76000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d4e34f29f330a1c300000000000ae988 XMM05=d3c00b9953c84d3300000000001391b8 XMM06=806171799158d9670000000000137c38 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffeb0e07ca8 CR3=000000001803e000 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=2032303a38333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a38333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000