[ 24.437657] BUG: Bad rss-counter state mm:00000000b6980e15 type:MM_FILEPAGES val:33 [ 24.438928] BUG: Bad rss-counter state mm:00000000b6980e15 type:MM_ANONPAGES val:22 [ 24.519747] ================================================================== [ 24.520436] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.521169] Read of size 8 at addr ffff88800eec4d08 by task sshd/219 [ 24.521759] [ 24.521924] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.522595] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.523363] Call Trace: [ 24.523612] [ 24.523835] dump_stack_lvl+0x91/0xf0 [ 24.524216] print_report+0xcc/0x620 [ 24.524596] ? __virt_addr_valid+0x102/0x340 [ 24.525194] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.525680] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.526159] kasan_report+0xbe/0xf0 [ 24.526526] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.527008] vma_interval_tree_remove+0xc75/0xec0 [ 24.527483] vma_prepare+0xc54/0x11a0 [ 24.527855] __split_vma+0x5af/0x950 [ 24.528217] ? __pfx___split_vma+0x10/0x10 [ 24.528628] ? find_held_lock+0x2c/0x110 [ 24.529033] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.529475] ? lock_is_held_type+0x9f/0x120 [ 24.529898] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.530364] ? mtree_range_walk+0x632/0x900 [ 24.530795] ? mas_walk+0x5c7/0x7c0 [ 24.531163] do_vmi_munmap+0x1f1/0x2b0 [ 24.531558] mmap_region+0x1f9/0x2660 [ 24.531930] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.532264] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.532728] ? __pfx_lock_acquire+0x10/0x10 [ 24.533076] ? __pfx_mmap_region+0x10/0x10 [ 24.533422] ? security_mmap_addr+0x7d/0xa0 [ 24.533771] ? get_unmapped_area+0x1f5/0x3f0 [ 24.534131] do_mmap+0x854/0xf00 [ 24.534420] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.534745] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.535112] ksys_mmap_pgoff+0x3af/0x500 [ 24.535552] do_syscall_64+0x3f/0x90 [ 24.535991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.536441] RIP: 0033:0x7fb738281d82 [ 24.536741] 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 [ 24.538135] RSP: 002b:00007fff09e716d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.538730] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb738281d82 [ 24.539296] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7376bb000 [ 24.539844] RBP: 00007fb7376bb000 R08: 0000000000000009 R09: 0000000000001000 [ 24.540402] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd272d0ec0 [ 24.540951] R13: 00007fff09e716f0 R14: 00007fff09e71720 R15: 00007fff09e71a80 [ 24.541507] [ 24.541699] [ 24.541841] Allocated by task 212: [ 24.542122] kasan_save_stack+0x22/0x50 [ 24.542450] kasan_set_track+0x25/0x30 [ 24.542775] __kasan_slab_alloc+0x59/0x70 [ 24.543130] kmem_cache_alloc+0x16b/0x370 [ 24.543476] vm_area_dup+0x20/0x160 [ 24.543774] __split_vma+0x170/0x950 [ 24.544097] split_vma+0xc6/0x110 [ 24.544387] mprotect_fixup+0x8d2/0xb30 [ 24.544715] do_mprotect_pkey+0x87e/0xd40 [ 24.545059] __x64_sys_mprotect+0x78/0xc0 [ 24.545402] do_syscall_64+0x3f/0x90 [ 24.545714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.546138] [ 24.546280] Freed by task 212: [ 24.546535] kasan_save_stack+0x22/0x50 [ 24.546862] kasan_set_track+0x25/0x30 [ 24.547183] kasan_save_free_info+0x2b/0x50 [ 24.547537] __kasan_slab_free+0x10a/0x190 [ 24.547884] kmem_cache_free+0x10d/0x4d0 [ 24.548219] rcu_core+0x8c8/0x2860 [ 24.548510] __do_softirq+0x1b7/0x7d4 [ 24.548822] [ 24.548962] Last potentially related work creation: [ 24.549345] kasan_save_stack+0x22/0x50 [ 24.549674] __kasan_record_aux_stack+0x8e/0xa0 [ 24.550052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.550471] remove_vma+0x139/0x170 [ 24.550766] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.551129] do_vmi_munmap+0x1f1/0x2b0 [ 24.551459] __vm_munmap+0x138/0x3a0 [ 24.551765] __x64_sys_munmap+0x59/0x80 [ 24.552092] do_syscall_64+0x3f/0x90 [ 24.552402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.552822] [ 24.552963] The buggy address belongs to the object at ffff88800eec4cb0 [ 24.552963] which belongs to the cache vm_area_struct of size 168 [ 24.553921] The buggy address is located 88 bytes inside of [ 24.553921] freed 168-byte region [ffff88800eec4cb0, ffff88800eec4d58) [ 24.554832] [ 24.554977] The buggy address belongs to the physical page: [ 24.555418] page:000000001b6fed90 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeec4 [ 24.556131] memcg:ffff888010055401 [ 24.556408] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.556868] page_type: 0xffffffff() [ 24.557165] raw: 0100000000000200 ffff88800879fc80 ffffea00003b6840 dead000000000005 [ 24.557763] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010055401 [ 24.558353] page dumped because: kasan: bad access detected [ 24.558785] [ 24.558925] Memory state around the buggy address: [ 24.559321] ffff88800eec4c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.559879] ffff88800eec4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.560435] >ffff88800eec4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.560996] ^ [ 24.561285] ffff88800eec4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.561845] ffff88800eec4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.562399] ================================================================== [ 24.563014] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.481790] BUG: Bad rss-counter state mm:000000002fc021a2 type:MM_FILEPAGES val:33 [ 26.482964] BUG: Bad rss-counter state mm:000000002fc021a2 type:MM_ANONPAGES val:22 [ 26.929351] BUG: Bad rss-counter state mm:00000000d0d6914c type:MM_FILEPAGES val:33 [ 26.930524] BUG: Bad rss-counter state mm:00000000d0d6914c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60167' (ECDSA) to the list of known hosts. 2023/06/19 15:50:02 fuzzer started 2023/06/19 15:50:03 dialing manager at localhost:44161 2023/06/19 15:50:03 checking machine... 2023/06/19 15:50:03 checking revisions... [ 27.576166] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:50:03 testing simple program... [ 27.620330] cgroup: Unknown subsys name 'net' [ 27.671164] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:50:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801605a340 RCX=ffffffff818dca39 RDX=ffff88800c990000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880146c7c48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88801605a4f8 R13=0000000000000020 R14=ffff88801605a3c8 R15=ffff88801605a418 RIP=ffffffff814c07e4 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 00007f339b5b6900 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=00007fffca406000 CR3=000000001ca9e000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f3c552d0940 CR3=000000000dcd2000 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=2032303a30353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a30353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000