[ 24.492432] BUG: Bad rss-counter state mm:00000000a1e56290 type:MM_FILEPAGES val:33 [ 24.494086] BUG: Bad rss-counter state mm:00000000a1e56290 type:MM_ANONPAGES val:22 [ 24.572162] ================================================================== [ 24.573518] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.574631] Read of size 8 at addr ffff88800de11ed8 by task sshd/219 [ 24.575638] [ 24.575931] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.577019] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.578318] Call Trace: [ 24.578740] [ 24.579117] dump_stack_lvl+0x91/0xf0 [ 24.579737] print_report+0xcc/0x620 [ 24.580371] ? __virt_addr_valid+0x102/0x340 [ 24.581066] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.581765] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.582463] kasan_report+0xbe/0xf0 [ 24.582998] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.583713] vma_interval_tree_remove+0xc75/0xec0 [ 24.584394] vma_prepare+0xc54/0x11a0 [ 24.584944] __split_vma+0x5af/0x950 [ 24.585484] ? __pfx___split_vma+0x10/0x10 [ 24.586087] ? find_held_lock+0x2c/0x110 [ 24.586678] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.587317] ? lock_is_held_type+0x9f/0x120 [ 24.587942] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.588627] ? mtree_range_walk+0x632/0x900 [ 24.589249] ? mas_walk+0x5c7/0x7c0 [ 24.589780] do_vmi_munmap+0x1f1/0x2b0 [ 24.590338] mmap_region+0x1f9/0x2660 [ 24.590881] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.591473] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.592286] ? __pfx_lock_acquire+0x10/0x10 [ 24.592892] ? __pfx_mmap_region+0x10/0x10 [ 24.593495] ? security_mmap_addr+0x7d/0xa0 [ 24.594097] ? get_unmapped_area+0x1f5/0x3f0 [ 24.594723] do_mmap+0x854/0xf00 [ 24.595216] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.595790] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.596431] ksys_mmap_pgoff+0x3af/0x500 [ 24.597008] do_syscall_64+0x3f/0x90 [ 24.597543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.598269] RIP: 0033:0x7fc9420c5d82 [ 24.598792] 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 [ 24.601219] RSP: 002b:00007fffd36d6bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.602271] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc9420c5d82 [ 24.603236] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc9414ff000 [ 24.604203] RBP: 00007fc9414ff000 R08: 0000000000000009 R09: 0000000000001000 [ 24.605162] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561ffc29b20 [ 24.606133] R13: 00007fffd36d6bd0 R14: 00007fffd36d6c00 R15: 00007fffd36d6f60 [ 24.607118] [ 24.607470] [ 24.607718] Allocated by task 209: [ 24.608216] kasan_save_stack+0x22/0x50 [ 24.608779] kasan_set_track+0x25/0x30 [ 24.609326] __kasan_slab_alloc+0x59/0x70 [ 24.609906] kmem_cache_alloc+0x16b/0x370 [ 24.610514] vm_area_dup+0x20/0x160 [ 24.611035] __split_vma+0x170/0x950 [ 24.611589] split_vma+0xc6/0x110 [ 24.612108] mprotect_fixup+0x8d2/0xb30 [ 24.612690] do_mprotect_pkey+0x87e/0xd40 [ 24.613288] __x64_sys_mprotect+0x78/0xc0 [ 24.613953] do_syscall_64+0x3f/0x90 [ 24.614494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.615227] [ 24.615494] Freed by task 13: [ 24.615938] kasan_save_stack+0x22/0x50 [ 24.616515] kasan_set_track+0x25/0x30 [ 24.617081] kasan_save_free_info+0x2b/0x50 [ 24.617689] __kasan_slab_free+0x10a/0x190 [ 24.618296] kmem_cache_free+0x10d/0x4d0 [ 24.618876] rcu_core+0x8c8/0x2860 [ 24.619383] __do_softirq+0x1b7/0x7d4 [ 24.619942] [ 24.620191] Last potentially related work creation: [ 24.620860] kasan_save_stack+0x22/0x50 [ 24.621449] __kasan_record_aux_stack+0x8e/0xa0 [ 24.622105] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.622837] remove_vma+0x139/0x170 [ 24.623348] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.624007] do_vmi_munmap+0x1f1/0x2b0 [ 24.624555] __vm_munmap+0x138/0x3a0 [ 24.625081] __x64_sys_munmap+0x59/0x80 [ 24.625641] do_syscall_64+0x3f/0x90 [ 24.626170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.626882] [ 24.627124] Second to last potentially related work creation: [ 24.627921] kasan_save_stack+0x22/0x50 [ 24.628484] __kasan_record_aux_stack+0x8e/0xa0 [ 24.629123] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.629854] remove_vma+0x139/0x170 [ 24.630354] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.630971] do_vmi_munmap+0x1f1/0x2b0 [ 24.631514] mmap_region+0x1f9/0x2660 [ 24.632043] do_mmap+0x854/0xf00 [ 24.632530] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.633087] ksys_mmap_pgoff+0x7d/0x500 [ 24.633656] do_syscall_64+0x3f/0x90 [ 24.634197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.634921] [ 24.635167] The buggy address belongs to the object at ffff88800de11e80 [ 24.635167] which belongs to the cache vm_area_struct of size 168 [ 24.636858] The buggy address is located 88 bytes inside of [ 24.636858] freed 168-byte region [ffff88800de11e80, ffff88800de11f28) [ 24.638478] [ 24.638726] The buggy address belongs to the physical page: [ 24.639482] page:00000000295a0d90 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde11 [ 24.640708] memcg:ffff88800d489201 [ 24.641183] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.641898] page_type: 0xffffffff() [ 24.642401] raw: 0100000000000200 ffff88800879fc80 ffffea000037a400 dead000000000008 [ 24.643430] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d489201 [ 24.644444] page dumped because: kasan: bad access detected [ 24.645167] [ 24.645413] Memory state around the buggy address: [ 24.646062] ffff88800de11d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.647016] ffff88800de11e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.647969] >ffff88800de11e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.648912] ^ [ 24.649720] ffff88800de11f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.650666] ffff88800de11f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.651609] ================================================================== [ 24.652784] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.596374] BUG: Bad rss-counter state mm:000000008686859d type:MM_FILEPAGES val:33 [ 26.597030] BUG: Bad rss-counter state mm:000000008686859d type:MM_ANONPAGES val:22 [ 27.014289] BUG: Bad rss-counter state mm:00000000083562ac type:MM_FILEPAGES val:33 [ 27.015967] BUG: Bad rss-counter state mm:00000000083562ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65379' (ECDSA) to the list of known hosts. 2023/06/20 06:22:30 fuzzer started 2023/06/20 06:22:30 dialing manager at localhost:44161 2023/06/20 06:22:30 checking machine... 2023/06/20 06:22:30 checking revisions... [ 27.779681] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:22:30 testing simple program... [ 27.830030] cgroup: Unknown subsys name 'net' [ 27.883347] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:22:29 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88800cbe9181 RCX=0000000000000000 RDX=0000000000000004 RSI=ffffffff8363599f RDI=ffff88800cbe9330 RBP=ffff88800cbe9180 RSP=ffff888016d97dd0 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88800cbe9180 R11=0000000000000000 R12=ffff888016d97e40 R13=ffff888016d97e50 R14=0000000000000001 R15=ffff88800885d640 RIP=ffffffff814c07e4 RFL=00000297 [--S-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 00007f33d1b8c700 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=00007f36cb2d3618 CR3=0000000016f90000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030333a3232 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303438 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=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=00007f787f073d30 CR3=000000000e700000 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=bf719b62076c3082774643f2b3e7d4d0 XMM02=000000000011d930eff9b2d0a8fce9cb XMM03=000000000011da002c67c8bc2e329bc3 XMM04=6e02766a8c5d271b00000000000ae988 XMM05=4d0adabb5065bbfa0000000000135dd0 XMM06=4fda316b135da52b0000000000134b00 XMM07=e042d86d42eb936e00000000001242d8 XMM08=50bfed0f81dbe643000000000011da00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000