syzkaller login: [ 38.595246] BUG: Bad rss-counter state mm:0000000048774552 type:MM_FILEPAGES val:33 [ 38.596004] BUG: Bad rss-counter state mm:0000000048774552 type:MM_ANONPAGES val:22 [ 38.711058] ================================================================== [ 38.712044] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.713066] Read of size 8 at addr ffff888015cca968 by task sshd/219 [ 38.714008] [ 38.714245] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.715180] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.716222] Call Trace: [ 38.716547] [ 38.716829] dump_stack_lvl+0x91/0xf0 [ 38.717320] print_report+0xcc/0x620 [ 38.717808] ? __virt_addr_valid+0x102/0x340 [ 38.718402] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.719033] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.719658] kasan_report+0xbe/0xf0 [ 38.720194] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.720888] vma_interval_tree_remove+0xc75/0xec0 [ 38.721534] vma_prepare+0xc54/0x11a0 [ 38.722071] __split_vma+0x5af/0x950 [ 38.722578] ? __pfx___split_vma+0x10/0x10 [ 38.723146] ? find_held_lock+0x2c/0x110 [ 38.723709] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.724339] ? lock_is_held_type+0x9f/0x120 [ 38.724925] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.725610] ? mtree_range_walk+0x632/0x900 [ 38.726219] ? mas_walk+0x5c7/0x7c0 [ 38.726734] do_vmi_munmap+0x1f1/0x2b0 [ 38.727309] mmap_region+0x1f9/0x2660 [ 38.727864] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.728451] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.729276] ? __pfx_lock_acquire+0x10/0x10 [ 38.729892] ? __pfx_mmap_region+0x10/0x10 [ 38.730530] ? security_mmap_addr+0x7d/0xa0 [ 38.731139] ? get_unmapped_area+0x1f5/0x3f0 [ 38.731779] do_mmap+0x854/0xf00 [ 38.732284] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.732853] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.733510] ksys_mmap_pgoff+0x3af/0x500 [ 38.734114] do_syscall_64+0x3f/0x90 [ 38.734664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.735414] RIP: 0033:0x7f67fb832d82 [ 38.735946] 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 [ 38.738343] RSP: 002b:00007ffc014cb4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.739321] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f67fb832d82 [ 38.740235] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f67fac6c000 [ 38.741151] RBP: 00007f67fac6c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.742093] R10: 0000000000000812 R11: 0000000000000206 R12: 000055867030aec0 [ 38.743004] R13: 00007ffc014cb4d0 R14: 00007ffc014cb500 R15: 00007ffc014cb860 [ 38.743922] [ 38.744233] [ 38.744466] Allocated by task 212: [ 38.744926] kasan_save_stack+0x22/0x50 [ 38.745474] kasan_set_track+0x25/0x30 [ 38.746010] __kasan_slab_alloc+0x59/0x70 [ 38.746578] kmem_cache_alloc+0x16b/0x370 [ 38.747130] vm_area_dup+0x20/0x160 [ 38.747615] __split_vma+0x170/0x950 [ 38.748113] split_vma+0xc6/0x110 [ 38.748583] mprotect_fixup+0x8d2/0xb30 [ 38.749121] do_mprotect_pkey+0x87e/0xd40 [ 38.749685] __x64_sys_mprotect+0x78/0xc0 [ 38.750251] do_syscall_64+0x3f/0x90 [ 38.750759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.751441] [ 38.751671] Freed by task 13: [ 38.752082] kasan_save_stack+0x22/0x50 [ 38.752620] kasan_set_track+0x25/0x30 [ 38.753148] kasan_save_free_info+0x2b/0x50 [ 38.753716] __kasan_slab_free+0x10a/0x190 [ 38.754306] kmem_cache_free+0x10d/0x4d0 [ 38.754849] rcu_core+0x8c8/0x2860 [ 38.755323] __do_softirq+0x1b7/0x7d4 [ 38.755836] [ 38.756067] Last potentially related work creation: [ 38.756692] kasan_save_stack+0x22/0x50 [ 38.757231] __kasan_record_aux_stack+0x8e/0xa0 [ 38.757837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.758530] remove_vma+0x139/0x170 [ 38.759012] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.759610] do_vmi_munmap+0x1f1/0x2b0 [ 38.760130] __vm_munmap+0x138/0x3a0 [ 38.760632] __x64_sys_munmap+0x59/0x80 [ 38.761165] do_syscall_64+0x3f/0x90 [ 38.761667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.762356] [ 38.762587] Second to last potentially related work creation: [ 38.763340] kasan_save_stack+0x22/0x50 [ 38.763879] __kasan_record_aux_stack+0x8e/0xa0 [ 38.764499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.765189] remove_vma+0x139/0x170 [ 38.765668] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.766283] do_vmi_munmap+0x1f1/0x2b0 [ 38.766806] mmap_region+0x1f9/0x2660 [ 38.767318] do_mmap+0x854/0xf00 [ 38.767786] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.768315] ksys_mmap_pgoff+0x3af/0x500 [ 38.768849] do_syscall_64+0x3f/0x90 [ 38.769361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.770071] [ 38.770301] The buggy address belongs to the object at ffff888015cca910 [ 38.770301] which belongs to the cache vm_area_struct of size 168 [ 38.771865] The buggy address is located 88 bytes inside of [ 38.771865] freed 168-byte region [ffff888015cca910, ffff888015cca9b8) [ 38.773364] [ 38.773603] The buggy address belongs to the physical page: [ 38.774318] page:0000000005dd11f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15cca [ 38.775497] memcg:ffff88800ef02e01 [ 38.775956] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.776696] page_type: 0xffffffff() [ 38.777180] raw: 0100000000000200 ffff8880087a0c80 ffffea000067af00 dead000000000005 [ 38.778191] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef02e01 [ 38.779159] page dumped because: kasan: bad access detected [ 38.779868] [ 38.780098] Memory state around the buggy address: [ 38.780713] ffff888015cca800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.781623] ffff888015cca880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.782551] >ffff888015cca900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.783473] ^ [ 38.784305] ffff888015cca980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.785218] ffff888015ccaa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.786132] ================================================================== [ 38.787210] Disabling lock debugging due to kernel taint [ 40.713579] BUG: Bad rss-counter state mm:000000008d675602 type:MM_FILEPAGES val:33 [ 40.714566] BUG: Bad rss-counter state mm:000000008d675602 type:MM_ANONPAGES val:22 [ 41.208388] BUG: Bad rss-counter state mm:000000006e2b7ba0 type:MM_FILEPAGES val:33 [ 41.210000] BUG: Bad rss-counter state mm:000000006e2b7ba0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37969' (ECDSA) to the list of known hosts. 2023/06/21 01:47:37 fuzzer started 2023/06/21 01:47:37 dialing manager at localhost:36067 2023/06/21 01:47:37 checking machine... 2023/06/21 01:47:37 checking revisions... [ 41.927382] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:47:38 testing simple program... [ 41.969825] cgroup: Unknown subsys name 'net' [ 42.028764] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:47:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002b8aeb9 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888015c575b8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f06 RFL=00000256 [---ZAP-] 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 00007f56ed688900 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=00007f576001d650 CR3=000000000c52a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=1f5440d87cb608c100000000000ae988 XMM05=ef291f45ac4533d20000000000133d88 XMM06=fe517fc0af3ae3850000000000132190 XMM07=fb795ef6d65770560000000000121340 XMM08=4f5453444600273d67736d000d0a0920 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=00007ffe02ac3a38 CR3=000000000fc2c000 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=2037333a37343a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a37343a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000