[ 31.108400] BUG: Bad rss-counter state mm:00000000ac22dd80 type:MM_FILEPAGES val:33 [ 31.109617] BUG: Bad rss-counter state mm:00000000ac22dd80 type:MM_ANONPAGES val:22 [ 31.152486] ================================================================== [ 31.153570] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.154593] Read of size 8 at addr ffff88800e094058 by task sshd/219 [ 31.155606] [ 31.155826] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.156816] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.157875] Call Trace: [ 31.158198] [ 31.158530] dump_stack_lvl+0x91/0xf0 [ 31.159068] print_report+0xcc/0x620 [ 31.159555] ? __virt_addr_valid+0x102/0x340 [ 31.160104] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.160736] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.161354] kasan_report+0xbe/0xf0 [ 31.161833] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.162462] vma_interval_tree_remove+0xc75/0xec0 [ 31.163065] vma_prepare+0xc54/0x11a0 [ 31.163555] __split_vma+0x5af/0x950 [ 31.164028] ? __pfx___split_vma+0x10/0x10 [ 31.164576] ? find_held_lock+0x2c/0x110 [ 31.165107] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.165691] ? lock_is_held_type+0x9f/0x120 [ 31.166253] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.166892] ? mtree_range_walk+0x632/0x900 [ 31.167485] ? mas_walk+0x5c7/0x7c0 [ 31.167967] do_vmi_munmap+0x1f1/0x2b0 [ 31.168504] mmap_region+0x1f9/0x2660 [ 31.168990] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.169506] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.170232] ? __pfx_lock_acquire+0x10/0x10 [ 31.170780] ? __pfx_mmap_region+0x10/0x10 [ 31.171319] ? security_mmap_addr+0x7d/0xa0 [ 31.171850] ? get_unmapped_area+0x1f5/0x3f0 [ 31.172427] do_mmap+0x854/0xf00 [ 31.172883] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.173387] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.173954] ksys_mmap_pgoff+0x3af/0x500 [ 31.174475] do_syscall_64+0x3f/0x90 [ 31.174959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.175611] RIP: 0033:0x7fb4db3f8d82 [ 31.176083] 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 [ 31.178267] RSP: 002b:00007ffcf5af3c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.179197] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4db3f8d82 [ 31.180063] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb4da832000 [ 31.180934] RBP: 00007fb4da832000 R08: 0000000000000009 R09: 0000000000001000 [ 31.181792] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0269f7d90 [ 31.182650] R13: 00007ffcf5af3c90 R14: 00007ffcf5af3cc0 R15: 00007ffcf5af4020 [ 31.183517] [ 31.183816] [ 31.184033] Allocated by task 211: [ 31.184495] kasan_save_stack+0x22/0x50 [ 31.185004] kasan_set_track+0x25/0x30 [ 31.185504] __kasan_slab_alloc+0x59/0x70 [ 31.186035] kmem_cache_alloc+0x16b/0x370 [ 31.186566] vm_area_dup+0x20/0x160 [ 31.187027] __split_vma+0x170/0x950 [ 31.187500] split_vma+0xc6/0x110 [ 31.187944] mprotect_fixup+0x8d2/0xb30 [ 31.188475] do_mprotect_pkey+0x87e/0xd40 [ 31.188998] __x64_sys_mprotect+0x78/0xc0 [ 31.189535] do_syscall_64+0x3f/0x90 [ 31.190022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.190674] [ 31.190897] Freed by task 203: [ 31.191295] kasan_save_stack+0x22/0x50 [ 31.191804] kasan_set_track+0x25/0x30 [ 31.192301] kasan_save_free_info+0x2b/0x50 [ 31.192864] __kasan_slab_free+0x10a/0x190 [ 31.193411] kmem_cache_free+0x10d/0x4d0 [ 31.193923] rcu_core+0x8c8/0x2860 [ 31.194381] __do_softirq+0x1b7/0x7d4 [ 31.194864] [ 31.195089] Last potentially related work creation: [ 31.195689] kasan_save_stack+0x22/0x50 [ 31.196212] __kasan_record_aux_stack+0x8e/0xa0 [ 31.196809] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.197476] remove_vma+0x139/0x170 [ 31.198013] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.198575] do_vmi_munmap+0x1f1/0x2b0 [ 31.199067] __vm_munmap+0x138/0x3a0 [ 31.199550] __x64_sys_munmap+0x59/0x80 [ 31.200057] do_syscall_64+0x3f/0x90 [ 31.200569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.201212] [ 31.201434] Second to last potentially related work creation: [ 31.202126] kasan_save_stack+0x22/0x50 [ 31.202638] __kasan_record_aux_stack+0x8e/0xa0 [ 31.203220] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.203870] remove_vma+0x139/0x170 [ 31.204332] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.204904] do_vmi_munmap+0x1f1/0x2b0 [ 31.205404] mmap_region+0x1f9/0x2660 [ 31.205898] do_mmap+0x854/0xf00 [ 31.206340] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.206834] ksys_mmap_pgoff+0x7d/0x500 [ 31.207340] do_syscall_64+0x3f/0x90 [ 31.207820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.208481] [ 31.208702] The buggy address belongs to the object at ffff88800e094000 [ 31.208702] which belongs to the cache vm_area_struct of size 168 [ 31.210215] The buggy address is located 88 bytes inside of [ 31.210215] freed 168-byte region [ffff88800e094000, ffff88800e0940a8) [ 31.211648] [ 31.211865] The buggy address belongs to the physical page: [ 31.212576] page:00000000b9fe7a08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe094 [ 31.213691] memcg:ffff88800daeff01 [ 31.214125] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.214769] page_type: 0xffffffff() [ 31.215232] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b0440 dead000000000004 [ 31.216162] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800daeff01 [ 31.217090] page dumped because: kasan: bad access detected [ 31.217767] [ 31.217988] Memory state around the buggy address: [ 31.218576] ffff88800e093f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.219448] ffff88800e093f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.220335] >ffff88800e094000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.221202] ^ [ 31.221948] ffff88800e094080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.222820] ffff88800e094100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.223687] ================================================================== [ 31.224651] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.574786] BUG: Bad rss-counter state mm:00000000e4e912e4 type:MM_FILEPAGES val:33 [ 33.576092] BUG: Bad rss-counter state mm:00000000e4e912e4 type:MM_ANONPAGES val:22 [ 34.112596] BUG: Bad rss-counter state mm:00000000966a4e20 type:MM_FILEPAGES val:33 [ 34.113787] BUG: Bad rss-counter state mm:00000000966a4e20 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21870' (ECDSA) to the list of known hosts. 2023/06/20 18:08:34 fuzzer started 2023/06/20 18:08:34 dialing manager at localhost:36067 2023/06/20 18:08:34 checking machine... 2023/06/20 18:08:34 checking revisions... [ 34.814455] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:08:34 testing simple program... [ 34.872789] cgroup: Unknown subsys name 'net' [ 34.939158] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:08:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8542a6c0 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8542aab4 RBP=ffffffff8540a0f8 RSP=ffff88806ce09e70 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff8540f200 R13=ffff88806ce39500 R14=0000000000000000 R15=0000000000039500 RIP=ffffffff8135bd6b RFL=00000217 [----APC] 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=00007ffe13bec268 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f6e72fb05100000564090cb1790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007eff7c003144 RBX=00007eff84019dd0 RCX=3a5d3832325b6468 RDX=0000000000000035 RSI=00007eff7c002cbe RDI=00007eff7c003144 RBP=0000000000000024 RSP=00007eff8bffe758 R8 =00007eff7c002d58 R9 =0000000000000000 R10=0000000000000009 R11=0000000000000286 R12=0000000000000019 R13=00007eff7c002cbe R14=0000000000000035 R15=000000000000005b RIP=00007eff910bca75 RFL=00000287 [--S--PC] 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 00007eff8bfff700 00000000 00000000 GS =0000 0000000000000000 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=00007fc153076840 CR3=000000000e388000 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=733a646873732878696e755f6d617020 XMM01=736f6c63206e6f6973736573203a296e XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a38303a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000