syzkaller login: [ 32.587172] BUG: Bad rss-counter state mm:00000000a66774bd type:MM_FILEPAGES val:33 [ 32.588360] BUG: Bad rss-counter state mm:00000000a66774bd type:MM_ANONPAGES val:22 [ 32.628319] ================================================================== [ 32.629443] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.630432] Read of size 8 at addr ffff88800dea6058 by task sshd/221 [ 32.631243] [ 32.631472] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.632378] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.633410] Call Trace: [ 32.633749] <TASK> [ 32.634051] dump_stack_lvl+0x91/0xf0 [ 32.634574] print_report+0xcc/0x620 [ 32.635085] ? __virt_addr_valid+0x102/0x340 [ 32.635667] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.636321] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.636977] kasan_report+0xbe/0xf0 [ 32.637503] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.638161] vma_interval_tree_remove+0xc75/0xec0 [ 32.638801] vma_prepare+0xc54/0x11a0 [ 32.639309] __split_vma+0x5af/0x950 [ 32.639817] ? __pfx___split_vma+0x10/0x10 [ 32.640376] ? find_held_lock+0x2c/0x110 [ 32.640939] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.641558] ? lock_is_held_type+0x9f/0x120 [ 32.642137] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.642784] ? mtree_range_walk+0x632/0x900 [ 32.643375] ? mas_walk+0x5c7/0x7c0 [ 32.643883] do_vmi_munmap+0x1f1/0x2b0 [ 32.644413] mmap_region+0x1f9/0x2660 [ 32.644928] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.645480] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.646241] ? __pfx_lock_acquire+0x10/0x10 [ 32.646807] ? __pfx_mmap_region+0x10/0x10 [ 32.647368] ? security_mmap_addr+0x7d/0xa0 [ 32.647930] ? get_unmapped_area+0x1f5/0x3f0 [ 32.648519] do_mmap+0x854/0xf00 [ 32.648987] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.649520] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.650125] ksys_mmap_pgoff+0x3af/0x500 [ 32.650659] do_syscall_64+0x3f/0x90 [ 32.651166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.651861] RIP: 0033:0x7f078c971d82 [ 32.652348] 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 [ 32.654608] RSP: 002b:00007ffd866835f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.655711] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f078c971d82 [ 32.656614] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f078bdab000 [ 32.657535] RBP: 00007f078bdab000 R08: 0000000000000009 R09: 0000000000001000 [ 32.658433] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee54191ec0 [ 32.659340] R13: 00007ffd86683610 R14: 00007ffd86683640 R15: 00007ffd866839a0 [ 32.660261] </TASK> [ 32.660576] [ 32.660805] Allocated by task 214: [ 32.661285] kasan_save_stack+0x22/0x50 [ 32.661824] kasan_set_track+0x25/0x30 [ 32.662351] __kasan_slab_alloc+0x59/0x70 [ 32.662910] kmem_cache_alloc+0x16b/0x370 [ 32.663460] vm_area_dup+0x20/0x160 [ 32.663946] __split_vma+0x170/0x950 [ 32.664442] split_vma+0xc6/0x110 [ 32.664917] mprotect_fixup+0x8d2/0xb30 [ 32.665467] do_mprotect_pkey+0x87e/0xd40 [ 32.666025] __x64_sys_mprotect+0x78/0xc0 [ 32.666586] do_syscall_64+0x3f/0x90 [ 32.667095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.667780] [ 32.668013] Freed by task 214: [ 32.668441] kasan_save_stack+0x22/0x50 [ 32.668980] kasan_set_track+0x25/0x30 [ 32.669511] kasan_save_free_info+0x2b/0x50 [ 32.670076] __kasan_slab_free+0x10a/0x190 [ 32.670643] kmem_cache_free+0x10d/0x4d0 [ 32.671180] rcu_core+0x8c8/0x2860 [ 32.671649] __do_softirq+0x1b7/0x7d4 [ 32.672169] [ 32.672402] Last potentially related work creation: [ 32.673023] kasan_save_stack+0x22/0x50 [ 32.673570] __kasan_record_aux_stack+0x8e/0xa0 [ 32.674178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.674860] remove_vma+0x139/0x170 [ 32.675344] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.675937] do_vmi_munmap+0x1f1/0x2b0 [ 32.676454] __vm_munmap+0x138/0x3a0 [ 32.676951] __x64_sys_munmap+0x59/0x80 [ 32.677489] do_syscall_64+0x3f/0x90 [ 32.677992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.678675] [ 32.678902] The buggy address belongs to the object at ffff88800dea6000 [ 32.678902] which belongs to the cache vm_area_struct of size 168 [ 32.680445] The buggy address is located 88 bytes inside of [ 32.680445] freed 168-byte region [ffff88800dea6000, ffff88800dea60a8) [ 32.681952] [ 32.682181] The buggy address belongs to the physical page: [ 32.682884] page:000000005e3379c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdea6 [ 32.684059] memcg:ffff88800ddfb301 [ 32.684520] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.685225] page_type: 0xffffffff() [ 32.685713] raw: 0100000000000200 ffff8880087a0c80 ffffea000038b300 dead000000000004 [ 32.686695] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddfb301 [ 32.687678] page dumped because: kasan: bad access detected [ 32.688382] [ 32.688610] Memory state around the buggy address: [ 32.689241] ffff88800dea5f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.690150] ffff88800dea5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.691075] >ffff88800dea6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.691983] ^ [ 32.692776] ffff88800dea6080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 32.693710] ffff88800dea6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.694622] ================================================================== [ 32.695870] Disabling lock debugging due to kernel taint [ 35.096938] BUG: Bad rss-counter state mm:000000003d609639 type:MM_FILEPAGES val:33 [ 35.097967] BUG: Bad rss-counter state mm:000000003d609639 type:MM_ANONPAGES val:22 [ 35.672283] BUG: Bad rss-counter state mm:000000009e67e3b8 type:MM_FILEPAGES val:33 [ 35.673590] BUG: Bad rss-counter state mm:000000009e67e3b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53724' (ECDSA) to the list of known hosts. 2023/06/20 22:28:50 fuzzer started 2023/06/20 22:28:51 dialing manager at localhost:36067 2023/06/20 22:28:51 checking machine... 2023/06/20 22:28:51 checking revisions... [ 36.356990] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:28:51 testing simple program... [ 36.411553] cgroup: Unknown subsys name 'net' [ 36.486444] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:28:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88807ffdc500 RCX=0000000000000003 RDX=1ffffd4000079020 RSI=ffffea00003c8100 RDI=ffff88807ffdc588 RBP=0100000000000000 RSP=ffff88800c6171a0 R8 =0000000000001000 R9 =000000000007ffe0 R10=ffffffff85d3d357 R11=1ffff1100fffb8b9 R12=0000000000000002 R13=ffff88807ffdc500 R14=0000000000000000 R15=0000000000000004 RIP=ffffffff817875ee RFL=00000046 [---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 00007f9f9a718900 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=00007f9f9accf618 CR3=000000000e7f2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c04400 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=00007f74e5707df0 CR3=000000000db3a000 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=e1d3e36cff8739a6af4a6aff27287174 XMM02=ec2efd57dc4c00df000000000011ace8 XMM03=69de4fbdba7751e8000000000011adb8 XMM04=4a922fe262bff21f00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131cf8 XMM06=14df2e2b527f18200000000000130b60 XMM07=e042d86d42eb936e00000000001221a0 XMM08=69de4fbdba7751e8000000000011adb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000