[ 26.206497] BUG: Bad rss-counter state mm:000000008aedfc18 type:MM_FILEPAGES val:33 [ 26.206524] BUG: Bad rss-counter state mm:000000008aedfc18 type:MM_ANONPAGES val:22 [ 26.569873] ================================================================== [ 26.570759] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.571687] Read of size 8 at addr ffff88800edeb880 by task sshd/222 [ 26.572445] [ 26.572662] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.573627] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.574586] Call Trace: [ 26.574900] [ 26.575206] dump_stack_lvl+0x91/0xf0 [ 26.575694] print_report+0xcc/0x620 [ 26.576173] ? __virt_addr_valid+0x102/0x340 [ 26.576721] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.577345] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.577952] kasan_report+0xbe/0xf0 [ 26.578419] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.579037] vma_interval_tree_remove+0xc75/0xec0 [ 26.579633] vma_prepare+0xc54/0x11a0 [ 26.580104] __split_vma+0x5af/0x950 [ 26.580579] ? __pfx___split_vma+0x10/0x10 [ 26.581106] ? find_held_lock+0x2c/0x110 [ 26.581631] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.582190] ? lock_is_held_type+0x9f/0x120 [ 26.582719] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.583316] ? mtree_range_walk+0x632/0x900 [ 26.583858] ? mas_walk+0x5c7/0x7c0 [ 26.584327] do_vmi_munmap+0x1f1/0x2b0 [ 26.584807] mmap_region+0x1f9/0x2660 [ 26.585311] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.585815] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.586523] ? __pfx_lock_acquire+0x10/0x10 [ 26.587060] ? __pfx_mmap_region+0x10/0x10 [ 26.587593] ? security_mmap_addr+0x7d/0xa0 [ 26.588128] ? get_unmapped_area+0x1f5/0x3f0 [ 26.588679] do_mmap+0x854/0xf00 [ 26.589111] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.589620] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.590171] ksys_mmap_pgoff+0x3af/0x500 [ 26.590674] do_syscall_64+0x3f/0x90 [ 26.591152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.591794] RIP: 0033:0x7fe5cfd65d82 [ 26.592253] 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 [ 26.594404] RSP: 002b:00007ffc14d889c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.595313] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5cfd65d82 [ 26.596165] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5cf19f000 [ 26.597011] RBP: 00007fe5cf19f000 R08: 0000000000000009 R09: 0000000000001000 [ 26.597870] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1a95a6ec0 [ 26.598710] R13: 00007ffc14d889e0 R14: 00007ffc14d88a10 R15: 00007ffc14d88d70 [ 26.599559] [ 26.599846] [ 26.600065] Allocated by task 207: [ 26.600494] kasan_save_stack+0x22/0x50 [ 26.600990] kasan_set_track+0x25/0x30 [ 26.601496] __kasan_slab_alloc+0x59/0x70 [ 26.602014] kmem_cache_alloc+0x16b/0x370 [ 26.602534] vm_area_dup+0x20/0x160 [ 26.602981] __split_vma+0x170/0x950 [ 26.603440] split_vma+0xc6/0x110 [ 26.603875] mprotect_fixup+0x8d2/0xb30 [ 26.604373] do_mprotect_pkey+0x87e/0xd40 [ 26.604885] __x64_sys_mprotect+0x78/0xc0 [ 26.605407] do_syscall_64+0x3f/0x90 [ 26.605875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.606514] [ 26.606731] Freed by task 104: [ 26.607123] kasan_save_stack+0x22/0x50 [ 26.607621] kasan_set_track+0x25/0x30 [ 26.608111] kasan_save_free_info+0x2b/0x50 [ 26.608651] __kasan_slab_free+0x10a/0x190 [ 26.609204] kmem_cache_free+0x10d/0x4d0 [ 26.609708] rcu_core+0x8c8/0x2860 [ 26.610146] __do_softirq+0x1b7/0x7d4 [ 26.610619] [ 26.610839] Last potentially related work creation: [ 26.611420] kasan_save_stack+0x22/0x50 [ 26.611918] __kasan_record_aux_stack+0x8e/0xa0 [ 26.612494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.613131] remove_vma+0x139/0x170 [ 26.613583] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.614138] do_vmi_munmap+0x1f1/0x2b0 [ 26.614628] __vm_munmap+0x138/0x3a0 [ 26.615092] __x64_sys_munmap+0x59/0x80 [ 26.615590] do_syscall_64+0x3f/0x90 [ 26.616058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.616693] [ 26.616909] The buggy address belongs to the object at ffff88800edeb828 [ 26.616909] which belongs to the cache vm_area_struct of size 168 [ 26.618375] The buggy address is located 88 bytes inside of [ 26.618375] freed 168-byte region [ffff88800edeb828, ffff88800edeb8d0) [ 26.619766] [ 26.619984] The buggy address belongs to the physical page: [ 26.620643] page:00000000dc795909 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedeb [ 26.621732] memcg:ffff88800ed3fc01 [ 26.622155] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.622792] page_type: 0xffffffff() [ 26.623247] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 26.624157] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed3fc01 [ 26.625059] page dumped because: kasan: bad access detected [ 26.625733] [ 26.625947] Memory state around the buggy address: [ 26.626521] ffff88800edeb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 26.627406] ffff88800edeb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 26.628247] >ffff88800edeb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 26.629086] ^ [ 26.629515] ffff88800edeb900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.630357] ffff88800edeb980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 26.631210] ================================================================== [ 26.632296] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.332107] BUG: Bad rss-counter state mm:000000001a0fdf23 type:MM_FILEPAGES val:33 [ 28.333094] BUG: Bad rss-counter state mm:000000001a0fdf23 type:MM_ANONPAGES val:22 [ 28.862029] BUG: Bad rss-counter state mm:000000007860636f type:MM_FILEPAGES val:33 [ 28.863232] BUG: Bad rss-counter state mm:000000007860636f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22297' (ECDSA) to the list of known hosts. 2023/06/19 12:34:41 fuzzer started 2023/06/19 12:34:41 dialing manager at localhost:44161 2023/06/19 12:34:41 checking machine... 2023/06/19 12:34:41 checking revisions... [ 29.528984] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:34:41 testing simple program... [ 29.578581] cgroup: Unknown subsys name 'net' [ 29.633647] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:34:39 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000123230 RCX=00007f4390205344 RDX=00007fff6bdddf98 RSI=00007fff6bdddf98 RDI=00005577e54a2330 RBP=00007fff6bdde018 RSP=00007fff6bdddf90 R8 =0000000000000058 R9 =0000000000123230 R10=0000000000000002 R11=00007f438eba1430 R12=00007f438eb90230 R13=00005577e54a1440 R14=0000000000000006 R15=00007fff6bdddfa0 RIP=00007f4390205475 RFL=00000202 [-------] 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 00007f438f682900 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=00007f438eb18f40 CR3=000000000ca6a000 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=b3285ca56c489dff000000000010c880 XMM01=588299219228ee8b124e5fa2fb02c96f XMM02=ec2efd57dc4c00df000000000011c7c8 XMM03=81b311f858cc3ba2000000000011c898 XMM04=3209f70a6409777100000000000ae988 XMM05=7bf22072abbc59720000000000133ce8 XMM06=4fda316b135da52b0000000000132a70 XMM07=e042d86d42eb936e0000000000121c60 XMM08=81b311f858cc3ba2000000000011c898 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000002000 RCX=00000000000928c0 RDX=0000000000000001 RSI=0000000000002000 RDI=ffff88800f244000 RBP=ffff888016d5f6e8 RSP=ffff888016d5f670 R8 =0000000000000000 R9 =0000000000000000 R10=ffffed1001e48800 R11=00000000000b6996 R12=ffff888008442280 R13=00000000000928c0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff818470a6 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f54ce9b6900 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=00007f54cef6d618 CR3=000000001bd14000 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