[ 24.016394] BUG: Bad rss-counter state mm:000000004dc45f35 type:MM_FILEPAGES val:33 [ 24.017600] BUG: Bad rss-counter state mm:000000004dc45f35 type:MM_ANONPAGES val:22 [ 24.165949] ================================================================== [ 24.166829] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.167760] Read of size 8 at addr ffff88801bc72a50 by task sshd/219 [ 24.168536] [ 24.168754] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.169724] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.170714] Call Trace: [ 24.171034] [ 24.171344] dump_stack_lvl+0x91/0xf0 [ 24.171847] print_report+0xcc/0x620 [ 24.172332] ? __virt_addr_valid+0x102/0x340 [ 24.172879] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.173495] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.174117] kasan_report+0xbe/0xf0 [ 24.174595] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.175216] vma_interval_tree_remove+0xc75/0xec0 [ 24.175832] vma_prepare+0xc54/0x11a0 [ 24.176309] __split_vma+0x5af/0x950 [ 24.176781] ? __pfx___split_vma+0x10/0x10 [ 24.177313] ? find_held_lock+0x2c/0x110 [ 24.177833] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.178402] ? lock_is_held_type+0x9f/0x120 [ 24.178940] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.179562] ? mtree_range_walk+0x632/0x900 [ 24.180124] ? mas_walk+0x5c7/0x7c0 [ 24.180593] do_vmi_munmap+0x1f1/0x2b0 [ 24.181088] mmap_region+0x1f9/0x2660 [ 24.181566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.182080] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.182803] ? __pfx_lock_acquire+0x10/0x10 [ 24.183344] ? __pfx_mmap_region+0x10/0x10 [ 24.183880] ? security_mmap_addr+0x7d/0xa0 [ 24.184415] ? get_unmapped_area+0x1f5/0x3f0 [ 24.184957] do_mmap+0x854/0xf00 [ 24.185389] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.185883] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.186450] ksys_mmap_pgoff+0x3af/0x500 [ 24.186955] do_syscall_64+0x3f/0x90 [ 24.187435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.188077] RIP: 0033:0x7fa05a916d82 [ 24.188528] 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 [ 24.190656] RSP: 002b:00007ffc2e24eb48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.191582] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa05a916d82 [ 24.192427] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa059d50000 [ 24.193278] RBP: 00007fa059d50000 R08: 0000000000000009 R09: 0000000000001000 [ 24.194260] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561754b71f70 [ 24.195140] R13: 00007ffc2e24eb60 R14: 00007ffc2e24eb90 R15: 00007ffc2e24eef0 [ 24.196045] [ 24.196344] [ 24.196565] Allocated by task 209: [ 24.197006] kasan_save_stack+0x22/0x50 [ 24.197513] kasan_set_track+0x25/0x30 [ 24.198017] __kasan_slab_alloc+0x59/0x70 [ 24.198557] kmem_cache_alloc+0x16b/0x370 [ 24.199093] vm_area_dup+0x20/0x160 [ 24.199565] __split_vma+0x170/0x950 [ 24.200059] split_vma+0xc6/0x110 [ 24.200513] mprotect_fixup+0x8d2/0xb30 [ 24.201037] do_mprotect_pkey+0x87e/0xd40 [ 24.201583] __x64_sys_mprotect+0x78/0xc0 [ 24.202116] do_syscall_64+0x3f/0x90 [ 24.202608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.203268] [ 24.203509] Freed by task 209: [ 24.203916] kasan_save_stack+0x22/0x50 [ 24.204439] kasan_set_track+0x25/0x30 [ 24.204950] kasan_save_free_info+0x2b/0x50 [ 24.205498] __kasan_slab_free+0x10a/0x190 [ 24.206035] kmem_cache_free+0x10d/0x4d0 [ 24.206561] rcu_core+0x8c8/0x2860 [ 24.207012] __do_softirq+0x1b7/0x7d4 [ 24.207508] [ 24.207730] Last potentially related work creation: [ 24.208326] kasan_save_stack+0x22/0x50 [ 24.208838] __kasan_record_aux_stack+0x8e/0xa0 [ 24.209431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.210081] remove_vma+0x139/0x170 [ 24.210544] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.211123] do_vmi_munmap+0x1f1/0x2b0 [ 24.211642] __vm_munmap+0x138/0x3a0 [ 24.212128] __x64_sys_munmap+0x59/0x80 [ 24.212628] do_syscall_64+0x3f/0x90 [ 24.213108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.213773] [ 24.213992] The buggy address belongs to the object at ffff88801bc729f8 [ 24.213992] which belongs to the cache vm_area_struct of size 168 [ 24.215559] The buggy address is located 88 bytes inside of [ 24.215559] freed 168-byte region [ffff88801bc729f8, ffff88801bc72aa0) [ 24.217020] [ 24.217243] The buggy address belongs to the physical page: [ 24.217936] page:000000003a13989f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc72 [ 24.219071] memcg:ffff888019f01f01 [ 24.219525] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.220187] page_type: 0xffffffff() [ 24.220660] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.221605] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f01f01 [ 24.222543] page dumped because: kasan: bad access detected [ 24.223225] [ 24.223466] Memory state around the buggy address: [ 24.224072] ffff88801bc72900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.224961] ffff88801bc72980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.225852] >ffff88801bc72a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.226741] ^ [ 24.227481] ffff88801bc72a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.228368] ffff88801bc72b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.229258] ================================================================== [ 24.230269] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.413095] BUG: Bad rss-counter state mm:00000000d427935e type:MM_FILEPAGES val:33 [ 26.414054] BUG: Bad rss-counter state mm:00000000d427935e type:MM_ANONPAGES val:22 [ 26.931620] BUG: Bad rss-counter state mm:00000000396361ec type:MM_FILEPAGES val:33 [ 26.932816] BUG: Bad rss-counter state mm:00000000396361ec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42760' (ECDSA) to the list of known hosts. 2023/06/21 05:52:45 fuzzer started 2023/06/21 05:52:45 dialing manager at localhost:36067 2023/06/21 05:52:45 checking machine... 2023/06/21 05:52:45 checking revisions... [ 27.575041] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:52:46 testing simple program... [ 27.621387] cgroup: Unknown subsys name 'net' [ 27.658579] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:52:45 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff888015bc7c18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d7d R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce361a0 R15=0000000000000000 RIP=ffffffff8135b980 RFL=00000086 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa591eaf900 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=00007fa5924670b0 CR3=000000000e32c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ff479933320 CR3=000000000c5a4000 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=78413898459e8ab0b545c9d67b6db7b1 XMM02=0000000000119e78ec2efd57dc4c00df XMM03=000000000011fff827f4c806b22205cc XMM04=ad3b96d061c1064400000000000ae988 XMM05=dfcdbad4f1609c370000000000130878 XMM06=806171799158d9670000000000130700 XMM07=e042d86d42eb936e0000000000120f80 XMM08=27f4c806b22205cc0000000000119ed8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000