[ 31.384240] BUG: Bad rss-counter state mm:0000000058db043d type:MM_FILEPAGES val:33 [ 31.385346] BUG: Bad rss-counter state mm:0000000058db043d type:MM_ANONPAGES val:22 [ 31.549521] ================================================================== [ 31.550443] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.551390] Read of size 8 at addr ffff88800ed83d08 by task sshd/220 [ 31.552168] [ 31.552388] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.553340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.554316] Call Trace: [ 31.554644] [ 31.554936] dump_stack_lvl+0x91/0xf0 [ 31.555448] print_report+0xcc/0x620 [ 31.555937] ? __virt_addr_valid+0x102/0x340 [ 31.556506] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.557124] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.557743] kasan_report+0xbe/0xf0 [ 31.558223] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.558838] vma_interval_tree_remove+0xc75/0xec0 [ 31.559453] vma_prepare+0xc54/0x11a0 [ 31.559938] __split_vma+0x5af/0x950 [ 31.560421] ? __pfx___split_vma+0x10/0x10 [ 31.560956] ? find_held_lock+0x2c/0x110 [ 31.561473] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.562038] ? lock_is_held_type+0x9f/0x120 [ 31.562586] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.563194] ? mtree_range_walk+0x632/0x900 [ 31.563747] ? mas_walk+0x5c7/0x7c0 [ 31.564249] do_vmi_munmap+0x1f1/0x2b0 [ 31.564742] mmap_region+0x1f9/0x2660 [ 31.565223] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.565731] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.566442] ? __pfx_lock_acquire+0x10/0x10 [ 31.566995] ? __pfx_mmap_region+0x10/0x10 [ 31.567533] ? security_mmap_addr+0x7d/0xa0 [ 31.568066] ? get_unmapped_area+0x1f5/0x3f0 [ 31.568631] do_mmap+0x854/0xf00 [ 31.569079] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.569593] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.570161] ksys_mmap_pgoff+0x3af/0x500 [ 31.570667] do_syscall_64+0x3f/0x90 [ 31.571153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.571809] RIP: 0033:0x7fa521391d82 [ 31.572278] 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 [ 31.574424] RSP: 002b:00007ffc21642788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.575338] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa521391d82 [ 31.576227] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5207cb000 [ 31.577077] RBP: 00007fa5207cb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.577924] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e84f5e7ec0 [ 31.578773] R13: 00007ffc216427a0 R14: 00007ffc216427d0 R15: 00007ffc21642b30 [ 31.579628] [ 31.579920] [ 31.580143] Allocated by task 213: [ 31.580575] kasan_save_stack+0x22/0x50 [ 31.581077] kasan_set_track+0x25/0x30 [ 31.581575] __kasan_slab_alloc+0x59/0x70 [ 31.582104] kmem_cache_alloc+0x16b/0x370 [ 31.582624] vm_area_dup+0x20/0x160 [ 31.583082] __split_vma+0x170/0x950 [ 31.583549] split_vma+0xc6/0x110 [ 31.583992] mprotect_fixup+0x8d2/0xb30 [ 31.584496] do_mprotect_pkey+0x87e/0xd40 [ 31.585016] __x64_sys_mprotect+0x78/0xc0 [ 31.585544] do_syscall_64+0x3f/0x90 [ 31.586016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.586658] [ 31.586878] Freed by task 213: [ 31.587272] kasan_save_stack+0x22/0x50 [ 31.587789] kasan_set_track+0x25/0x30 [ 31.588311] kasan_save_free_info+0x2b/0x50 [ 31.588841] __kasan_slab_free+0x10a/0x190 [ 31.589380] kmem_cache_free+0x10d/0x4d0 [ 31.589896] rcu_core+0x8c8/0x2860 [ 31.590338] __do_softirq+0x1b7/0x7d4 [ 31.590813] [ 31.591029] Last potentially related work creation: [ 31.591610] kasan_save_stack+0x22/0x50 [ 31.592109] __kasan_record_aux_stack+0x8e/0xa0 [ 31.592698] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.593341] remove_vma+0x139/0x170 [ 31.593795] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.594355] do_vmi_munmap+0x1f1/0x2b0 [ 31.594844] __vm_munmap+0x138/0x3a0 [ 31.595339] __x64_sys_munmap+0x59/0x80 [ 31.595841] do_syscall_64+0x3f/0x90 [ 31.596340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.596986] [ 31.597200] Second to last potentially related work creation: [ 31.597878] kasan_save_stack+0x22/0x50 [ 31.598382] __kasan_record_aux_stack+0x8e/0xa0 [ 31.598952] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.599601] remove_vma+0x139/0x170 [ 31.600049] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.600621] do_vmi_munmap+0x1f1/0x2b0 [ 31.601110] mmap_region+0x1f9/0x2660 [ 31.601591] do_mmap+0x854/0xf00 [ 31.602020] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.602510] ksys_mmap_pgoff+0x3af/0x500 [ 31.603014] do_syscall_64+0x3f/0x90 [ 31.603492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.604145] [ 31.604365] The buggy address belongs to the object at ffff88800ed83cb0 [ 31.604365] which belongs to the cache vm_area_struct of size 168 [ 31.605828] The buggy address is located 88 bytes inside of [ 31.605828] freed 168-byte region [ffff88800ed83cb0, ffff88800ed83d58) [ 31.607229] [ 31.607447] The buggy address belongs to the physical page: [ 31.608113] page:00000000ac9947f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed83 [ 31.609207] memcg:ffff888009433801 [ 31.609636] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.610333] page_type: 0xffffffff() [ 31.610792] raw: 0100000000000200 ffff8880087a0c80 ffffea0000367e00 dead000000000003 [ 31.611712] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009433801 [ 31.612631] page dumped because: kasan: bad access detected [ 31.613288] [ 31.613506] Memory state around the buggy address: [ 31.614093] ffff88800ed83c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.614950] ffff88800ed83c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.615809] >ffff88800ed83d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.616672] ^ [ 31.617115] ffff88800ed83d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.617969] ffff88800ed83e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.618824] ================================================================== [ 31.619783] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.405340] BUG: Bad rss-counter state mm:00000000e7b3a2c5 type:MM_FILEPAGES val:33 [ 33.406320] BUG: Bad rss-counter state mm:00000000e7b3a2c5 type:MM_ANONPAGES val:22 [ 33.877916] BUG: Bad rss-counter state mm:00000000d007c12d type:MM_FILEPAGES val:33 [ 33.879040] BUG: Bad rss-counter state mm:00000000d007c12d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27772' (ECDSA) to the list of known hosts. 2023/06/20 23:15:10 fuzzer started 2023/06/20 23:15:10 dialing manager at localhost:36067 2023/06/20 23:15:10 checking machine... 2023/06/20 23:15:10 checking revisions... [ 34.666740] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:15:11 testing simple program... [ 34.717392] cgroup: Unknown subsys name 'net' [ 34.777191] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:15:10 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffd4425bab8 CR3=000000000e4e0000 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=35313a3332203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030313a3531 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303232 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=1ffffffff0c13012 RBX=0000000000000002 RCX=ffffffff86098092 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88806cf09ab8 RBP=ffff88806cf09aa8 RSP=ffff88806cf09990 R8 =ffffffff86098096 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09a50 R15=ffff88806cf09a50 RIP=ffffffff81131118 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 00007f932148e900 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=00007f9321a43650 CR3=000000000d7bc000 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=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