syzkaller login: [ 40.462308] BUG: Bad rss-counter state mm:000000007074daa0 type:MM_FILEPAGES val:33 [ 40.463610] BUG: Bad rss-counter state mm:000000007074daa0 type:MM_ANONPAGES val:22 [ 40.504355] ================================================================== [ 40.505193] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.506113] Read of size 8 at addr ffff88800f1e2058 by task sshd/225 [ 40.506809] [ 40.507012] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.507841] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.508726] Call Trace: [ 40.509024] [ 40.509291] dump_stack_lvl+0x91/0xf0 [ 40.509744] print_report+0xcc/0x620 [ 40.510190] ? __virt_addr_valid+0x102/0x340 [ 40.510697] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.511272] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.511861] kasan_report+0xbe/0xf0 [ 40.512337] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.512915] vma_interval_tree_remove+0xc75/0xec0 [ 40.513494] vma_prepare+0xc54/0x11a0 [ 40.513945] __split_vma+0x5af/0x950 [ 40.514384] ? __pfx___split_vma+0x10/0x10 [ 40.514870] ? find_held_lock+0x2c/0x110 [ 40.515354] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.515885] ? lock_is_held_type+0x9f/0x120 [ 40.516384] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.516941] ? mtree_range_walk+0x632/0x900 [ 40.517453] ? mas_walk+0x5c7/0x7c0 [ 40.517885] do_vmi_munmap+0x1f1/0x2b0 [ 40.518332] mmap_region+0x1f9/0x2660 [ 40.518773] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.519242] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.519923] ? __pfx_lock_acquire+0x10/0x10 [ 40.520418] ? __pfx_mmap_region+0x10/0x10 [ 40.520902] ? security_mmap_addr+0x7d/0xa0 [ 40.521408] ? get_unmapped_area+0x1f5/0x3f0 [ 40.521921] do_mmap+0x854/0xf00 [ 40.522327] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.522781] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.523298] ksys_mmap_pgoff+0x3af/0x500 [ 40.523771] do_syscall_64+0x3f/0x90 [ 40.524205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.524794] RIP: 0033:0x7f05cbe4bd82 [ 40.525209] 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 [ 40.527128] RSP: 002b:00007ffc1aca5ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.527978] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05cbe4bd82 [ 40.528759] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05cb285000 [ 40.529539] RBP: 00007f05cb285000 R08: 0000000000000009 R09: 0000000000001000 [ 40.530318] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e30cd7cd90 [ 40.531114] R13: 00007ffc1aca5af0 R14: 00007ffc1aca5b20 R15: 00007ffc1aca5e80 [ 40.531917] [ 40.532193] [ 40.532390] Allocated by task 218: [ 40.532787] kasan_save_stack+0x22/0x50 [ 40.533248] kasan_set_track+0x25/0x30 [ 40.533704] __kasan_slab_alloc+0x59/0x70 [ 40.534185] kmem_cache_alloc+0x16b/0x370 [ 40.534662] vm_area_dup+0x20/0x160 [ 40.535087] __split_vma+0x170/0x950 [ 40.535528] split_vma+0xc6/0x110 [ 40.535941] mprotect_fixup+0x8d2/0xb30 [ 40.536402] do_mprotect_pkey+0x87e/0xd40 [ 40.536886] __x64_sys_mprotect+0x78/0xc0 [ 40.537373] do_syscall_64+0x3f/0x90 [ 40.537806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.538390] [ 40.538589] Freed by task 218: [ 40.538949] kasan_save_stack+0x22/0x50 [ 40.539415] kasan_set_track+0x25/0x30 [ 40.539899] kasan_save_free_info+0x2b/0x50 [ 40.540386] __kasan_slab_free+0x10a/0x190 [ 40.540874] kmem_cache_free+0x10d/0x4d0 [ 40.541316] rcu_core+0x8c8/0x2860 [ 40.541722] __do_softirq+0x1b7/0x7d4 [ 40.542158] [ 40.542354] Last potentially related work creation: [ 40.542892] kasan_save_stack+0x22/0x50 [ 40.543349] __kasan_record_aux_stack+0x8e/0xa0 [ 40.543898] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.544480] remove_vma+0x139/0x170 [ 40.544902] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.545416] do_vmi_munmap+0x1f1/0x2b0 [ 40.545856] __vm_munmap+0x138/0x3a0 [ 40.546279] __x64_sys_munmap+0x59/0x80 [ 40.546741] do_syscall_64+0x3f/0x90 [ 40.547171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.547931] [ 40.548201] The buggy address belongs to the object at ffff88800f1e2000 [ 40.548201] which belongs to the cache vm_area_struct of size 168 [ 40.549971] The buggy address is located 88 bytes inside of [ 40.549971] freed 168-byte region [ffff88800f1e2000, ffff88800f1e20a8) [ 40.551693] [ 40.551954] The buggy address belongs to the physical page: [ 40.552750] page:00000000d51840d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1e2 [ 40.554077] memcg:ffff88800c6f0b01 [ 40.554636] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.555514] page_type: 0xffffffff() [ 40.556083] raw: 0100000000000200 ffff88800879fc80 ffffea000067ccc0 dead000000000005 [ 40.557305] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6f0b01 [ 40.558508] page dumped because: kasan: bad access detected [ 40.559389] [ 40.559684] Memory state around the buggy address: [ 40.560467] ffff88800f1e1f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 40.561598] ffff88800f1e1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.562720] >ffff88800f1e2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.563846] ^ [ 40.564621] ffff88800f1e2080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 40.565535] ffff88800f1e2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.566450] ================================================================== [ 40.567634] Disabling lock debugging due to kernel taint [ 42.329117] BUG: Bad rss-counter state mm:0000000093acecb4 type:MM_FILEPAGES val:33 [ 42.329750] BUG: Bad rss-counter state mm:0000000093acecb4 type:MM_ANONPAGES val:22 [ 42.782434] BUG: Bad rss-counter state mm:000000000eb96f04 type:MM_FILEPAGES val:33 [ 42.783662] BUG: Bad rss-counter state mm:000000000eb96f04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9621' (ECDSA) to the list of known hosts. 2023/06/19 15:56:02 fuzzer started 2023/06/19 15:56:02 dialing manager at localhost:44161 2023/06/19 15:56:02 checking machine... 2023/06/19 15:56:02 checking revisions... [ 43.524944] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:56:02 testing simple program... [ 43.593658] cgroup: Unknown subsys name 'net' [ 43.647676] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:56:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0adb045 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff8880165ffbe0 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=0000000000000003 R13=fffffbfff0adb044 R14=0000000000000001 R15=1ffff11002cbff7d RIP=ffffffff84530860 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 00007f1cf6d79900 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=00007f1cf7330618 CR3=0000000016afa000 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=563412feff00545000000000000080fe 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=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=00007fc37ef45fb0 CR3=0000000009a26000 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=af0e993e78b391933144f03c3180e0b6 XMM02=2c67c8bc2e329bc3000000000011d6f8 XMM03=fb795ef6d65770560000000000124098 XMM04=35ccfcc23f77d76b00000000000ae988 XMM05=e7a3b7508224713400000000001338d8 XMM06=259b2b4d3920b8660000000000132ab0 XMM07=e042d86d42eb936e0000000000124370 XMM08=90e965bddb5e5099000000000011d758 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000