[ 24.607424] BUG: Bad rss-counter state mm:00000000f1371556 type:MM_FILEPAGES val:33 [ 24.608484] BUG: Bad rss-counter state mm:00000000f1371556 type:MM_ANONPAGES val:22 [ 24.774195] ================================================================== [ 24.775118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.776072] Read of size 8 at addr ffff88800eaaab38 by task sshd/219 [ 24.776851] [ 24.777120] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.778043] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.779022] Call Trace: [ 24.779370] [ 24.779661] dump_stack_lvl+0x91/0xf0 [ 24.780172] print_report+0xcc/0x620 [ 24.780668] ? __virt_addr_valid+0x102/0x340 [ 24.781237] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.781894] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.782510] kasan_report+0xbe/0xf0 [ 24.782986] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.783601] vma_interval_tree_remove+0xc75/0xec0 [ 24.784207] vma_prepare+0xc54/0x11a0 [ 24.784689] __split_vma+0x5af/0x950 [ 24.785162] ? __pfx___split_vma+0x10/0x10 [ 24.785688] ? find_held_lock+0x2c/0x110 [ 24.786227] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.786789] ? lock_is_held_type+0x9f/0x120 [ 24.787335] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.787940] ? mtree_range_walk+0x632/0x900 [ 24.788493] ? mas_walk+0x5c7/0x7c0 [ 24.788969] do_vmi_munmap+0x1f1/0x2b0 [ 24.789462] mmap_region+0x1f9/0x2660 [ 24.789954] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.790474] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.791181] ? __pfx_lock_acquire+0x10/0x10 [ 24.791710] ? __pfx_mmap_region+0x10/0x10 [ 24.792236] ? security_mmap_addr+0x7d/0xa0 [ 24.792767] ? get_unmapped_area+0x1f5/0x3f0 [ 24.793316] do_mmap+0x854/0xf00 [ 24.793779] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.794278] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.794838] ksys_mmap_pgoff+0x3af/0x500 [ 24.795347] do_syscall_64+0x3f/0x90 [ 24.795829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.796477] RIP: 0033:0x7eff825ecd82 [ 24.796934] 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 [ 24.799054] RSP: 002b:00007ffee6981be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.799948] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff825ecd82 [ 24.800790] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff81a26000 [ 24.801631] RBP: 00007eff81a26000 R08: 0000000000000009 R09: 0000000000001000 [ 24.802487] R10: 0000000000000812 R11: 0000000000000206 R12: 000055797f1acd90 [ 24.803331] R13: 00007ffee6981c00 R14: 00007ffee6981c30 R15: 00007ffee6981f90 [ 24.804189] [ 24.804485] [ 24.804700] Allocated by task 212: [ 24.805126] kasan_save_stack+0x22/0x50 [ 24.805633] kasan_set_track+0x25/0x30 [ 24.806164] __kasan_slab_alloc+0x59/0x70 [ 24.806688] kmem_cache_alloc+0x16b/0x370 [ 24.807207] vm_area_dup+0x20/0x160 [ 24.807669] __split_vma+0x170/0x950 [ 24.808149] split_vma+0xc6/0x110 [ 24.808598] mprotect_fixup+0x8d2/0xb30 [ 24.809110] do_mprotect_pkey+0x87e/0xd40 [ 24.809639] __x64_sys_mprotect+0x78/0xc0 [ 24.810173] do_syscall_64+0x3f/0x90 [ 24.810653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.811311] [ 24.811531] Freed by task 212: [ 24.811941] kasan_save_stack+0x22/0x50 [ 24.812462] kasan_set_track+0x25/0x30 [ 24.812967] kasan_save_free_info+0x2b/0x50 [ 24.813511] __kasan_slab_free+0x10a/0x190 [ 24.814064] kmem_cache_free+0x10d/0x4d0 [ 24.814576] rcu_core+0x8c8/0x2860 [ 24.815036] __do_softirq+0x1b7/0x7d4 [ 24.815524] [ 24.815743] Last potentially related work creation: [ 24.816340] kasan_save_stack+0x22/0x50 [ 24.816851] __kasan_record_aux_stack+0x8e/0xa0 [ 24.817436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.818120] remove_vma+0x139/0x170 [ 24.818585] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.819160] do_vmi_munmap+0x1f1/0x2b0 [ 24.819663] __vm_munmap+0x138/0x3a0 [ 24.820141] __x64_sys_munmap+0x59/0x80 [ 24.820649] do_syscall_64+0x3f/0x90 [ 24.821124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.821785] [ 24.822012] Second to last potentially related work creation: [ 24.822707] kasan_save_stack+0x22/0x50 [ 24.823222] __kasan_record_aux_stack+0x8e/0xa0 [ 24.823805] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.824460] remove_vma+0x139/0x170 [ 24.824921] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.825493] do_vmi_munmap+0x1f1/0x2b0 [ 24.825995] mmap_region+0x1f9/0x2660 [ 24.826482] do_mmap+0x854/0xf00 [ 24.826925] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.827423] ksys_mmap_pgoff+0x3af/0x500 [ 24.827932] do_syscall_64+0x3f/0x90 [ 24.828424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.829085] [ 24.829303] The buggy address belongs to the object at ffff88800eaaaae0 [ 24.829303] which belongs to the cache vm_area_struct of size 168 [ 24.830802] The buggy address is located 88 bytes inside of [ 24.830802] freed 168-byte region [ffff88800eaaaae0, ffff88800eaaab88) [ 24.832230] [ 24.832449] The buggy address belongs to the physical page: [ 24.833118] page:00000000a5435900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeaaa [ 24.834220] memcg:ffff88800e71d201 [ 24.834654] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.835306] page_type: 0xffffffff() [ 24.835758] raw: 0100000000000200 ffff88800879fc80 ffffea00003a9080 dead000000000004 [ 24.836677] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e71d201 [ 24.837605] page dumped because: kasan: bad access detected [ 24.838283] [ 24.838504] Memory state around the buggy address: [ 24.839100] ffff88800eaaaa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.839966] ffff88800eaaaa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 24.840838] >ffff88800eaaab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.841697] ^ [ 24.842325] ffff88800eaaab80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 24.843191] ffff88800eaaac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.844054] ================================================================== [ 24.845037] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.434488] BUG: Bad rss-counter state mm:00000000e16cedf4 type:MM_FILEPAGES val:33 [ 27.435424] BUG: Bad rss-counter state mm:00000000e16cedf4 type:MM_ANONPAGES val:22 [ 27.935921] BUG: Bad rss-counter state mm:00000000c8ab7d28 type:MM_FILEPAGES val:33 [ 27.936947] BUG: Bad rss-counter state mm:00000000c8ab7d28 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42678' (ECDSA) to the list of known hosts. 2023/06/19 17:57:36 fuzzer started 2023/06/19 17:57:36 dialing manager at localhost:44161 2023/06/19 17:57:36 checking machine... 2023/06/19 17:57:36 checking revisions... [ 28.751980] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:57:37 testing simple program... [ 28.805408] cgroup: Unknown subsys name 'net' [ 28.875664] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:57:35 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800e2b7b78 RCX=0000000000000000 RDX=ffff888016623680 RSI=ffffffff844f039b RDI=0000000000000005 RBP=0000000000000013 RSP=ffff88800e2b7ad0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff8880088fbc80 R13=ffff88800eaa1e80 R14=0000000000000000 R15=ffff888008f92808 RIP=ffffffff814c0800 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 00007f5ec0e66900 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=00007f5ec141b650 CR3=0000000016560000 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=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 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=00007f21a9d84820 CR3=000000000ca02000 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=4c91bbf65267b2a74241c13c1e25fd5c XMM02=2c67c8bc2e329bc3000000000011dfe0 XMM03=fb795ef6d65770560000000000123e88 XMM04=1e418ee7704f832100000000000ae988 XMM05=0fe4ab51aaa0bafe0000000000135f38 XMM06=806171799158d9670000000000134c68 XMM07=e042d86d42eb936e0000000000124160 XMM08=ad5440e2b0130dbc000000000011e040 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000