[ 30.553766] BUG: Bad rss-counter state mm:00000000bba0530d type:MM_FILEPAGES val:33 [ 30.554527] BUG: Bad rss-counter state mm:00000000bba0530d type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.712134] ================================================================== [ 30.712770] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.713408] Read of size 8 at addr ffff88800d54c5c8 by task sshd/222 [ 30.713927] [ 30.714082] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.714660] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.715486] Call Trace: [ 30.715710] [ 30.715913] dump_stack_lvl+0x91/0xf0 [ 30.716376] print_report+0xcc/0x620 [ 30.716715] ? __virt_addr_valid+0x102/0x340 [ 30.717097] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.717521] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.717993] kasan_report+0xbe/0xf0 [ 30.718811] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.719320] vma_interval_tree_remove+0xc75/0xec0 [ 30.719753] vma_prepare+0xc54/0x11a0 [ 30.720099] __split_vma+0x5af/0x950 [ 30.720443] ? __pfx___split_vma+0x10/0x10 [ 30.720811] ? find_held_lock+0x2c/0x110 [ 30.721175] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.721566] ? lock_is_held_type+0x9f/0x120 [ 30.721946] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.722381] ? mtree_range_walk+0x632/0x900 [ 30.722779] ? mas_walk+0x5c7/0x7c0 [ 30.723174] do_vmi_munmap+0x1f1/0x2b0 [ 30.723525] mmap_region+0x1f9/0x2660 [ 30.723875] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.724246] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.724768] ? __pfx_lock_acquire+0x10/0x10 [ 30.725149] ? __pfx_mmap_region+0x10/0x10 [ 30.725526] ? security_mmap_addr+0x7d/0xa0 [ 30.725897] ? get_unmapped_area+0x1f5/0x3f0 [ 30.726301] do_mmap+0x854/0xf00 [ 30.726626] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.727020] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.727430] ksys_mmap_pgoff+0x3af/0x500 [ 30.727793] do_syscall_64+0x3f/0x90 [ 30.728144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.728602] RIP: 0033:0x7f88d84c8d82 [ 30.728930] 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 [ 30.730437] RSP: 002b:00007ffcd68417f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.731180] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88d84c8d82 [ 30.731803] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88d7902000 [ 30.732442] RBP: 00007f88d7902000 R08: 0000000000000009 R09: 0000000000001000 [ 30.733043] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d6deeab20 [ 30.733655] R13: 00007ffcd6841810 R14: 00007ffcd6841840 R15: 00007ffcd6841ba0 [ 30.734320] [ 30.734534] [ 30.734689] Allocated by task 213: [ 30.735023] kasan_save_stack+0x22/0x50 [ 30.735409] kasan_set_track+0x25/0x30 [ 30.735800] __kasan_slab_alloc+0x59/0x70 [ 30.736198] kmem_cache_alloc+0x16b/0x370 [ 30.736571] vm_area_dup+0x20/0x160 [ 30.736903] __split_vma+0x170/0x950 [ 30.737300] split_vma+0xc6/0x110 [ 30.737623] mprotect_fixup+0x8d2/0xb30 [ 30.737995] do_mprotect_pkey+0x87e/0xd40 [ 30.738379] __x64_sys_mprotect+0x78/0xc0 [ 30.738765] do_syscall_64+0x3f/0x90 [ 30.739131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739590] [ 30.739744] Freed by task 204: [ 30.740050] kasan_save_stack+0x22/0x50 [ 30.740567] kasan_set_track+0x25/0x30 [ 30.740910] kasan_save_free_info+0x2b/0x50 [ 30.741447] __kasan_slab_free+0x10a/0x190 [ 30.741845] kmem_cache_free+0x10d/0x4d0 [ 30.742257] rcu_core+0x8c8/0x2860 [ 30.742574] __do_softirq+0x1b7/0x7d4 [ 30.742925] [ 30.743085] Last potentially related work creation: [ 30.743484] kasan_save_stack+0x22/0x50 [ 30.743851] __kasan_record_aux_stack+0x8e/0xa0 [ 30.744290] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.744756] remove_vma+0x139/0x170 [ 30.745088] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.745494] do_vmi_munmap+0x1f1/0x2b0 [ 30.745831] __vm_munmap+0x138/0x3a0 [ 30.746173] __x64_sys_munmap+0x59/0x80 [ 30.746516] do_syscall_64+0x3f/0x90 [ 30.746861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.747446] [ 30.747606] The buggy address belongs to the object at ffff88800d54c570 [ 30.747606] which belongs to the cache vm_area_struct of size 168 [ 30.748603] The buggy address is located 88 bytes inside of [ 30.748603] freed 168-byte region [ffff88800d54c570, ffff88800d54c618) [ 30.749609] [ 30.749764] The buggy address belongs to the physical page: [ 30.750238] page:000000006194f74b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd54c [ 30.751014] memcg:ffff88800d714c01 [ 30.751318] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.751810] page_type: 0xffffffff() [ 30.752138] raw: 0100000000000200 ffff8880087a0c80 ffffea0000329800 dead000000000003 [ 30.752797] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d714c01 [ 30.753495] page dumped because: kasan: bad access detected [ 30.753960] [ 30.754124] Memory state around the buggy address: [ 30.754519] ffff88800d54c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.755191] ffff88800d54c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.755819] >ffff88800d54c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.756426] ^ [ 30.756898] ffff88800d54c600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.757516] ffff88800d54c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.758131] ================================================================== [ 30.759347] Disabling lock debugging due to kernel taint [ 32.553921] BUG: Bad rss-counter state mm:000000000c76ee8c type:MM_FILEPAGES val:33 [ 32.554652] BUG: Bad rss-counter state mm:000000000c76ee8c type:MM_ANONPAGES val:22 [ 33.109741] BUG: Bad rss-counter state mm:0000000050c866e3 type:MM_FILEPAGES val:33 [ 33.112321] BUG: Bad rss-counter state mm:0000000050c866e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7183' (ECDSA) to the list of known hosts. 2023/06/21 00:12:26 fuzzer started 2023/06/21 00:12:26 dialing manager at localhost:36067 2023/06/21 00:12:26 checking machine... 2023/06/21 00:12:26 checking revisions... [ 33.738145] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:12:26 testing simple program... [ 33.786074] cgroup: Unknown subsys name 'net' [ 33.828217] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:12:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fff67399b18 CR3=000000000c5d6000 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=32313a3030203132206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34363833342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343638 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888016b8f970 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88800d0ca5f0 R12=ffff88800844e918 R13=ffffffff81806afe R14=ffff88800844e900 R15=ffff8880103b7ab0 RIP=ffffffff8180f0a8 RFL=00000083 [--S---C] 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 00007f1880b55900 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=00007f188110a650 CR3=000000000946c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000