[ 33.625012] BUG: Bad rss-counter state mm:00000000cea1c976 type:MM_FILEPAGES val:33 [ 33.626035] BUG: Bad rss-counter state mm:00000000cea1c976 type:MM_ANONPAGES val:22 [ 33.786810] ================================================================== [ 33.787701] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.788644] Read of size 8 at addr ffff88800e312968 by task sshd/218 [ 33.789510] [ 33.789726] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.790599] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.791584] Call Trace: [ 33.791903] [ 33.792196] dump_stack_lvl+0x91/0xf0 [ 33.792694] print_report+0xcc/0x620 [ 33.793181] ? __virt_addr_valid+0x102/0x340 [ 33.793732] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.794368] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.794982] kasan_report+0xbe/0xf0 [ 33.795455] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.796076] vma_interval_tree_remove+0xc75/0xec0 [ 33.796673] vma_prepare+0xc54/0x11a0 [ 33.797146] __split_vma+0x5af/0x950 [ 33.797612] ? __pfx___split_vma+0x10/0x10 [ 33.798149] ? find_held_lock+0x2c/0x110 [ 33.798671] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.799230] ? lock_is_held_type+0x9f/0x120 [ 33.799762] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.800363] ? mtree_range_walk+0x632/0x900 [ 33.800915] ? mas_walk+0x5c7/0x7c0 [ 33.801385] do_vmi_munmap+0x1f1/0x2b0 [ 33.801872] mmap_region+0x1f9/0x2660 [ 33.802371] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.802885] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.803598] ? __pfx_lock_acquire+0x10/0x10 [ 33.804126] ? __pfx_mmap_region+0x10/0x10 [ 33.804654] ? security_mmap_addr+0x7d/0xa0 [ 33.805183] ? get_unmapped_area+0x1f5/0x3f0 [ 33.805732] do_mmap+0x854/0xf00 [ 33.806189] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.806684] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.807248] ksys_mmap_pgoff+0x3af/0x500 [ 33.807751] do_syscall_64+0x3f/0x90 [ 33.808224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.808860] RIP: 0033:0x7f8e2e96bd82 [ 33.809310] 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 [ 33.811430] RSP: 002b:00007ffcf55e2498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.812325] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e2e96bd82 [ 33.813162] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e2dda5000 [ 33.814005] RBP: 00007f8e2dda5000 R08: 0000000000000009 R09: 0000000000001000 [ 33.814839] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a5ffd1cb20 [ 33.815671] R13: 00007ffcf55e24b0 R14: 00007ffcf55e24e0 R15: 00007ffcf55e2840 [ 33.816517] [ 33.816808] [ 33.817020] Allocated by task 211: [ 33.817450] kasan_save_stack+0x22/0x50 [ 33.817968] kasan_set_track+0x25/0x30 [ 33.818470] __kasan_slab_alloc+0x59/0x70 [ 33.818992] kmem_cache_alloc+0x16b/0x370 [ 33.819510] vm_area_dup+0x20/0x160 [ 33.819964] __split_vma+0x170/0x950 [ 33.820430] split_vma+0xc6/0x110 [ 33.820868] mprotect_fixup+0x8d2/0xb30 [ 33.821374] do_mprotect_pkey+0x87e/0xd40 [ 33.821892] __x64_sys_mprotect+0x78/0xc0 [ 33.822424] do_syscall_64+0x3f/0x90 [ 33.822892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.823538] [ 33.823760] Freed by task 19: [ 33.824140] kasan_save_stack+0x22/0x50 [ 33.824640] kasan_set_track+0x25/0x30 [ 33.825140] kasan_save_free_info+0x2b/0x50 [ 33.825683] __kasan_slab_free+0x10a/0x190 [ 33.826228] kmem_cache_free+0x10d/0x4d0 [ 33.826741] rcu_core+0x8c8/0x2860 [ 33.827180] __do_softirq+0x1b7/0x7d4 [ 33.827659] [ 33.827876] Last potentially related work creation: [ 33.828449] kasan_save_stack+0x22/0x50 [ 33.828950] __kasan_record_aux_stack+0x8e/0xa0 [ 33.829516] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.830161] remove_vma+0x139/0x170 [ 33.830607] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.831167] do_vmi_munmap+0x1f1/0x2b0 [ 33.831647] __vm_munmap+0x138/0x3a0 [ 33.832112] __x64_sys_munmap+0x59/0x80 [ 33.832602] do_syscall_64+0x3f/0x90 [ 33.833070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.833702] [ 33.833931] Second to last potentially related work creation: [ 33.834618] kasan_save_stack+0x22/0x50 [ 33.835117] __kasan_record_aux_stack+0x8e/0xa0 [ 33.835684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.836318] remove_vma+0x139/0x170 [ 33.836772] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.837322] do_vmi_munmap+0x1f1/0x2b0 [ 33.837803] mmap_region+0x1f9/0x2660 [ 33.838294] do_mmap+0x854/0xf00 [ 33.838723] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.839217] ksys_mmap_pgoff+0x3af/0x500 [ 33.839712] do_syscall_64+0x3f/0x90 [ 33.840185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.840817] [ 33.841029] The buggy address belongs to the object at ffff88800e312910 [ 33.841029] which belongs to the cache vm_area_struct of size 168 [ 33.842503] The buggy address is located 88 bytes inside of [ 33.842503] freed 168-byte region [ffff88800e312910, ffff88800e3129b8) [ 33.843929] [ 33.844140] The buggy address belongs to the physical page: [ 33.844808] page:000000005385d023 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe312 [ 33.845892] memcg:ffff88800e59e901 [ 33.846348] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.847049] page_type: 0xffffffff() [ 33.847504] raw: 0100000000000200 ffff88800879fc80 ffffea000032a100 dead000000000003 [ 33.848419] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e59e901 [ 33.849341] page dumped because: kasan: bad access detected [ 33.850016] [ 33.850235] Memory state around the buggy address: [ 33.850812] ffff88800e312800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 33.851697] ffff88800e312880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 33.852548] >ffff88800e312900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.853390] ^ [ 33.854176] ffff88800e312980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.855019] ffff88800e312a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.855856] ================================================================== [ 33.856901] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.003917] BUG: Bad rss-counter state mm:000000002c449ea6 type:MM_FILEPAGES val:33 [ 36.005286] BUG: Bad rss-counter state mm:000000002c449ea6 type:MM_ANONPAGES val:22 [ 36.544966] BUG: Bad rss-counter state mm:000000006ee8952f type:MM_FILEPAGES val:33 [ 36.545951] BUG: Bad rss-counter state mm:000000006ee8952f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22641' (ECDSA) to the list of known hosts. 2023/06/20 01:31:03 fuzzer started 2023/06/20 01:31:03 dialing manager at localhost:44161 2023/06/20 01:31:03 checking machine... 2023/06/20 01:31:03 checking revisions... [ 37.262798] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:31:03 testing simple program... [ 37.310511] cgroup: Unknown subsys name 'net' [ 37.357170] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:30:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800b56c040 RCX=ffffffff818d53b3 RDX=ffff8880167eb680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000003 RSP=ffff888016407928 R8 =0000000000000005 R9 =0000000000000007 R10=0000000000000003 R11=0000000000000001 R12=69676f6c2f000000 R13=69676f6c2f637465 R14=dffffc0000000000 R15=ffff88800b56c070 RIP=ffffffff814c07e4 RFL=00000206 [-----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 00007ff5cbd4a900 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=00007ffcbb0c3000 CR3=00000000168f6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f7d21df6150 CR3=000000000d96e000 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=2032303a31333a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a31333a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000