syzkaller login: [ 40.340548] BUG: Bad rss-counter state mm:0000000087771803 type:MM_FILEPAGES val:33 [ 40.341563] BUG: Bad rss-counter state mm:0000000087771803 type:MM_ANONPAGES val:22 [ 40.515345] ================================================================== [ 40.516457] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.517394] Read of size 8 at addr ffff888018389a50 by task sshd/219 [ 40.518253] [ 40.518470] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.519335] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.520333] Call Trace: [ 40.520651] [ 40.520939] dump_stack_lvl+0x91/0xf0 [ 40.521424] print_report+0xcc/0x620 [ 40.521912] ? __virt_addr_valid+0x102/0x340 [ 40.522454] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.523066] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.523688] kasan_report+0xbe/0xf0 [ 40.524172] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.524799] vma_interval_tree_remove+0xc75/0xec0 [ 40.525397] vma_prepare+0xc54/0x11a0 [ 40.525876] __split_vma+0x5af/0x950 [ 40.526344] ? __pfx___split_vma+0x10/0x10 [ 40.526866] ? find_held_lock+0x2c/0x110 [ 40.527383] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.527969] ? lock_is_held_type+0x9f/0x120 [ 40.528499] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.529098] ? mtree_range_walk+0x632/0x900 [ 40.529654] ? mas_walk+0x5c7/0x7c0 [ 40.530133] do_vmi_munmap+0x1f1/0x2b0 [ 40.530621] mmap_region+0x1f9/0x2660 [ 40.531102] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.531613] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.532331] ? __pfx_lock_acquire+0x10/0x10 [ 40.532860] ? __pfx_mmap_region+0x10/0x10 [ 40.533385] ? security_mmap_addr+0x7d/0xa0 [ 40.533916] ? get_unmapped_area+0x1f5/0x3f0 [ 40.534465] do_mmap+0x854/0xf00 [ 40.534903] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.535397] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.535962] ksys_mmap_pgoff+0x3af/0x500 [ 40.536464] do_syscall_64+0x3f/0x90 [ 40.536934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.537578] RIP: 0033:0x7f953cc9bd82 [ 40.538032] 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 [ 40.540164] RSP: 002b:00007ffd3e27ce78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.541069] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f953cc9bd82 [ 40.541913] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f953c0d5000 [ 40.542754] RBP: 00007f953c0d5000 R08: 0000000000000009 R09: 0000000000001000 [ 40.543590] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558191471ec0 [ 40.544434] R13: 00007ffd3e27ce90 R14: 00007ffd3e27cec0 R15: 00007ffd3e27d220 [ 40.545286] [ 40.545576] [ 40.545790] Allocated by task 212: [ 40.546215] kasan_save_stack+0x22/0x50 [ 40.546713] kasan_set_track+0x25/0x30 [ 40.547203] __kasan_slab_alloc+0x59/0x70 [ 40.547721] kmem_cache_alloc+0x16b/0x370 [ 40.548240] vm_area_dup+0x20/0x160 [ 40.548693] __split_vma+0x170/0x950 [ 40.549154] split_vma+0xc6/0x110 [ 40.549592] mprotect_fixup+0x8d2/0xb30 [ 40.550086] do_mprotect_pkey+0x87e/0xd40 [ 40.550603] __x64_sys_mprotect+0x78/0xc0 [ 40.551117] do_syscall_64+0x3f/0x90 [ 40.551583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.552237] [ 40.552450] Freed by task 212: [ 40.552840] kasan_save_stack+0x22/0x50 [ 40.553336] kasan_set_track+0x25/0x30 [ 40.553827] kasan_save_free_info+0x2b/0x50 [ 40.554355] __kasan_slab_free+0x10a/0x190 [ 40.554880] kmem_cache_free+0x10d/0x4d0 [ 40.555392] rcu_core+0x8c8/0x2860 [ 40.555832] __do_softirq+0x1b7/0x7d4 [ 40.556318] [ 40.556532] Last potentially related work creation: [ 40.557112] kasan_save_stack+0x22/0x50 [ 40.557618] __kasan_record_aux_stack+0x8e/0xa0 [ 40.558194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.558832] remove_vma+0x139/0x170 [ 40.559283] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.559845] do_vmi_munmap+0x1f1/0x2b0 [ 40.560349] __vm_munmap+0x138/0x3a0 [ 40.560814] __x64_sys_munmap+0x59/0x80 [ 40.561307] do_syscall_64+0x3f/0x90 [ 40.561775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.562411] [ 40.562624] The buggy address belongs to the object at ffff8880183899f8 [ 40.562624] which belongs to the cache vm_area_struct of size 168 [ 40.564095] The buggy address is located 88 bytes inside of [ 40.564095] freed 168-byte region [ffff8880183899f8, ffff888018389aa0) [ 40.565498] [ 40.565713] The buggy address belongs to the physical page: [ 40.566369] page:00000000d71211a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18389 [ 40.567460] memcg:ffff888019f45801 [ 40.567895] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.568540] page_type: 0xffffffff() [ 40.568986] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.569897] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f45801 [ 40.570802] page dumped because: kasan: bad access detected [ 40.571456] [ 40.571669] Memory state around the buggy address: [ 40.572263] ffff888018389900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.573118] ffff888018389980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 40.573969] >ffff888018389a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.574816] ^ [ 40.575520] ffff888018389a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 40.576380] ffff888018389b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.577228] ================================================================== [ 40.578195] Disabling lock debugging due to kernel taint [ 42.298974] BUG: Bad rss-counter state mm:0000000061d48192 type:MM_FILEPAGES val:33 [ 42.299589] BUG: Bad rss-counter state mm:0000000061d48192 type:MM_ANONPAGES val:22 [ 42.735564] BUG: Bad rss-counter state mm:0000000033e10541 type:MM_FILEPAGES val:33 [ 42.736789] BUG: Bad rss-counter state mm:0000000033e10541 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5222' (ECDSA) to the list of known hosts. 2023/06/19 18:43:37 fuzzer started 2023/06/19 18:43:37 dialing manager at localhost:44161 2023/06/19 18:43:37 checking machine... 2023/06/19 18:43:37 checking revisions... [ 43.434527] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:43:37 testing simple program... [ 43.486941] cgroup: Unknown subsys name 'net' [ 43.527784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:43:27 Registers: info registers vcpu 0 RAX=000000000000002c RBX=00000000000000e1 RCX=00007f4b52a94366 RDX=00000000000000f4 RSI=00007ffd10af5090 RDI=0000000000000008 RBP=00000000000000f4 RSP=ffff888015ab7ff0 R8 =00007ffd10af507c R9 =000000000000000c R10=0000000000000000 R11=0000000000000246 R12=0000000000000008 R13=00007ffd10af5090 R14=00007ffd10af507c R15=0000000000000452 RIP=ffffffff84600037 RFL=00000002 [-------] 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 00007f4b525a1900 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=00007ffd10af6000 CR3=000000001803c000 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=00007f1793de36a0 CR3=000000000f218000 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=0f728bc89a12299aaf43e39f5d1b0852 XMM02=2c67c8bc2e329bc3000000000011cff0 XMM03=fb795ef6d65770560000000000124568 XMM04=bb007c5c3cf7fe3d00000000000ae988 XMM05=6dce13d47ce7305c0000000000134370 XMM06=806171799158d9670000000000133ff8 XMM07=e042d86d42eb936e00000000001247e8 XMM08=e386c3479a75bb7b000000000011d050 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000