syzkaller login: [ 38.773059] BUG: Bad rss-counter state mm:00000000e25a9492 type:MM_FILEPAGES val:33 [ 38.774899] BUG: Bad rss-counter state mm:00000000e25a9492 type:MM_ANONPAGES val:22 [ 38.952424] ================================================================== [ 38.953531] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.954674] Read of size 8 at addr ffff88800e4db880 by task sshd/219 [ 38.955746] [ 38.955980] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.956897] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.957958] Call Trace: [ 38.958298] [ 38.958613] dump_stack_lvl+0x91/0xf0 [ 38.959131] print_report+0xcc/0x620 [ 38.959639] ? __virt_addr_valid+0x102/0x340 [ 38.960214] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.960855] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.961498] kasan_report+0xbe/0xf0 [ 38.961993] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.962651] vma_interval_tree_remove+0xc75/0xec0 [ 38.963284] vma_prepare+0xc54/0x11a0 [ 38.963784] __split_vma+0x5af/0x950 [ 38.964277] ? __pfx___split_vma+0x10/0x10 [ 38.964828] ? find_held_lock+0x2c/0x110 [ 38.965384] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.965997] ? lock_is_held_type+0x9f/0x120 [ 38.966611] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.967263] ? mtree_range_walk+0x632/0x900 [ 38.967862] ? mas_walk+0x5c7/0x7c0 [ 38.968355] do_vmi_munmap+0x1f1/0x2b0 [ 38.968890] mmap_region+0x1f9/0x2660 [ 38.969413] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.969956] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.970733] ? __pfx_lock_acquire+0x10/0x10 [ 38.971289] ? __pfx_mmap_region+0x10/0x10 [ 38.971854] ? security_mmap_addr+0x7d/0xa0 [ 38.972427] ? get_unmapped_area+0x1f5/0x3f0 [ 38.973004] do_mmap+0x854/0xf00 [ 38.973477] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.974005] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.974610] ksys_mmap_pgoff+0x3af/0x500 [ 38.975150] do_syscall_64+0x3f/0x90 [ 38.975649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.976327] RIP: 0033:0x7fa2030f4d82 [ 38.976805] 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 [ 38.979084] RSP: 002b:00007ffd29fab538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.980036] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2030f4d82 [ 38.980896] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa20252e000 [ 38.981749] RBP: 00007fa20252e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.982623] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b7b20ffb20 [ 38.983490] R13: 00007ffd29fab550 R14: 00007ffd29fab580 R15: 00007ffd29fab8e0 [ 38.984366] [ 38.984665] [ 38.984887] Allocated by task 212: [ 38.985328] kasan_save_stack+0x22/0x50 [ 38.985844] kasan_set_track+0x25/0x30 [ 38.986350] __kasan_slab_alloc+0x59/0x70 [ 38.986909] kmem_cache_alloc+0x16b/0x370 [ 38.987449] vm_area_dup+0x20/0x160 [ 38.987922] __split_vma+0x170/0x950 [ 38.988424] split_vma+0xc6/0x110 [ 38.988893] mprotect_fixup+0x8d2/0xb30 [ 38.989410] do_mprotect_pkey+0x87e/0xd40 [ 38.989961] __x64_sys_mprotect+0x78/0xc0 [ 38.990521] do_syscall_64+0x3f/0x90 [ 38.991023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.991710] [ 38.991934] Freed by task 212: [ 38.992349] kasan_save_stack+0x22/0x50 [ 38.992884] kasan_set_track+0x25/0x30 [ 38.993398] kasan_save_free_info+0x2b/0x50 [ 38.993971] __kasan_slab_free+0x10a/0x190 [ 38.994519] kmem_cache_free+0x10d/0x4d0 [ 38.995033] rcu_core+0x8c8/0x2860 [ 38.995482] __do_softirq+0x1b7/0x7d4 [ 38.995968] [ 38.996245] Last potentially related work creation: [ 38.996840] kasan_save_stack+0x22/0x50 [ 38.997353] __kasan_record_aux_stack+0x8e/0xa0 [ 38.997940] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.998641] remove_vma+0x139/0x170 [ 38.999122] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.999722] do_vmi_munmap+0x1f1/0x2b0 [ 39.000224] __vm_munmap+0x138/0x3a0 [ 39.000710] __x64_sys_munmap+0x59/0x80 [ 39.001230] do_syscall_64+0x3f/0x90 [ 39.001733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.002378] [ 39.002607] The buggy address belongs to the object at ffff88800e4db828 [ 39.002607] which belongs to the cache vm_area_struct of size 168 [ 39.004085] The buggy address is located 88 bytes inside of [ 39.004085] freed 168-byte region [ffff88800e4db828, ffff88800e4db8d0) [ 39.005520] [ 39.005742] The buggy address belongs to the physical page: [ 39.006435] page:00000000ec373088 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4db [ 39.007583] memcg:ffff88800ed4a201 [ 39.008026] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.008745] page_type: 0xffffffff() [ 39.009230] raw: 0100000000000200 ffff8880087a0c80 ffffea0000379c40 dead000000000007 [ 39.010179] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed4a201 [ 39.011132] page dumped because: kasan: bad access detected [ 39.011802] [ 39.012021] Memory state around the buggy address: [ 39.012625] ffff88800e4db780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.013492] ffff88800e4db800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.014360] >ffff88800e4db880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.015232] ^ [ 39.015656] ffff88800e4db900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.016531] ffff88800e4db980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.017394] ================================================================== [ 39.018432] Disabling lock debugging due to kernel taint [ 40.756631] BUG: Bad rss-counter state mm:000000006e6345c3 type:MM_FILEPAGES val:33 [ 40.757501] BUG: Bad rss-counter state mm:000000006e6345c3 type:MM_ANONPAGES val:22 [ 41.209026] BUG: Bad rss-counter state mm:000000009cbef331 type:MM_FILEPAGES val:33 [ 41.210096] BUG: Bad rss-counter state mm:000000009cbef331 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43804' (ECDSA) to the list of known hosts. 2023/06/20 20:46:55 fuzzer started 2023/06/20 20:46:56 dialing manager at localhost:36067 2023/06/20 20:46:56 checking machine... 2023/06/20 20:46:56 checking revisions... [ 42.030048] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:46:56 testing simple program... [ 42.070181] cgroup: Unknown subsys name 'net' [ 42.132082] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:46:55 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=00007fe9440da7a0 CR3=000000000ea66000 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=2035353a36343a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a36343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff813710b9 RSP=ffff88806cf09db8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000095 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff8135b935 RFL=00000047 [---Z-PC] 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 00007f54feeae900 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=00007ffdf7ced000 CR3=000000000e70e000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000