syzkaller login: [ 30.554803] BUG: Bad rss-counter state mm:000000008fe18533 type:MM_FILEPAGES val:33 [ 30.556241] BUG: Bad rss-counter state mm:000000008fe18533 type:MM_ANONPAGES val:22 [ 30.715653] ================================================================== [ 30.716762] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.718008] Read of size 8 at addr ffff88800dc9b968 by task sshd/218 [ 30.718926] [ 30.719188] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.720249] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.721237] Call Trace: [ 30.721564] [ 30.721860] dump_stack_lvl+0x91/0xf0 [ 30.722376] print_report+0xcc/0x620 [ 30.722861] ? __virt_addr_valid+0x102/0x340 [ 30.723424] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.724041] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.724666] kasan_report+0xbe/0xf0 [ 30.725143] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.725774] vma_interval_tree_remove+0xc75/0xec0 [ 30.726403] vma_prepare+0xc54/0x11a0 [ 30.726888] __split_vma+0x5af/0x950 [ 30.727367] ? __pfx___split_vma+0x10/0x10 [ 30.727904] ? find_held_lock+0x2c/0x110 [ 30.728435] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.729009] ? lock_is_held_type+0x9f/0x120 [ 30.729553] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.730181] ? mtree_range_walk+0x632/0x900 [ 30.730737] ? mas_walk+0x5c7/0x7c0 [ 30.731212] do_vmi_munmap+0x1f1/0x2b0 [ 30.731708] mmap_region+0x1f9/0x2660 [ 30.732189] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.732707] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.733423] ? __pfx_lock_acquire+0x10/0x10 [ 30.733962] ? __pfx_mmap_region+0x10/0x10 [ 30.734491] ? security_mmap_addr+0x7d/0xa0 [ 30.735022] ? get_unmapped_area+0x1f5/0x3f0 [ 30.735567] do_mmap+0x854/0xf00 [ 30.736005] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.736503] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.737062] ksys_mmap_pgoff+0x3af/0x500 [ 30.737569] do_syscall_64+0x3f/0x90 [ 30.738059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.738709] RIP: 0033:0x7f7d15935d82 [ 30.739161] 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 [ 30.741283] RSP: 002b:00007ffd02f965a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.742198] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d15935d82 [ 30.743048] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d14d6f000 [ 30.743890] RBP: 00007f7d14d6f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.744740] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596584d0f70 [ 30.745582] R13: 00007ffd02f965c0 R14: 00007ffd02f965f0 R15: 00007ffd02f96950 [ 30.746454] [ 30.746750] [ 30.746966] Allocated by task 211: [ 30.747402] kasan_save_stack+0x22/0x50 [ 30.747915] kasan_set_track+0x25/0x30 [ 30.748414] __kasan_slab_alloc+0x59/0x70 [ 30.748940] kmem_cache_alloc+0x16b/0x370 [ 30.749457] vm_area_dup+0x20/0x160 [ 30.749916] __split_vma+0x170/0x950 [ 30.750395] split_vma+0xc6/0x110 [ 30.750838] mprotect_fixup+0x8d2/0xb30 [ 30.751354] do_mprotect_pkey+0x87e/0xd40 [ 30.751880] __x64_sys_mprotect+0x78/0xc0 [ 30.752404] do_syscall_64+0x3f/0x90 [ 30.752885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.753538] [ 30.753752] Freed by task 211: [ 30.754159] kasan_save_stack+0x22/0x50 [ 30.754677] kasan_set_track+0x25/0x30 [ 30.755173] kasan_save_free_info+0x2b/0x50 [ 30.755712] __kasan_slab_free+0x10a/0x190 [ 30.756246] kmem_cache_free+0x10d/0x4d0 [ 30.756764] rcu_core+0x8c8/0x2860 [ 30.757217] __do_softirq+0x1b7/0x7d4 [ 30.757710] [ 30.757963] Last potentially related work creation: [ 30.758564] kasan_save_stack+0x22/0x50 [ 30.759072] __kasan_record_aux_stack+0x8e/0xa0 [ 30.759656] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.760308] remove_vma+0x139/0x170 [ 30.760767] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.761336] do_vmi_munmap+0x1f1/0x2b0 [ 30.761832] __vm_munmap+0x138/0x3a0 [ 30.762306] __x64_sys_munmap+0x59/0x80 [ 30.762801] do_syscall_64+0x3f/0x90 [ 30.763279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.763965] [ 30.764179] The buggy address belongs to the object at ffff88800dc9b910 [ 30.764179] which belongs to the cache vm_area_struct of size 168 [ 30.765640] The buggy address is located 88 bytes inside of [ 30.765640] freed 168-byte region [ffff88800dc9b910, ffff88800dc9b9b8) [ 30.767059] [ 30.767275] The buggy address belongs to the physical page: [ 30.767925] page:00000000d5f906d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc9b [ 30.768990] memcg:ffff88800dcaa801 [ 30.769411] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.770064] page_type: 0xffffffff() [ 30.770525] raw: 0100000000000200 ffff8880087a0c80 ffffea0000372dc0 dead000000000002 [ 30.771436] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcaa801 [ 30.772327] page dumped because: kasan: bad access detected [ 30.772988] [ 30.773204] Memory state around the buggy address: [ 30.773777] ffff88800dc9b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.774638] ffff88800dc9b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.775484] >ffff88800dc9b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.776323] ^ [ 30.777106] ffff88800dc9b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.777967] ffff88800dc9ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.778815] ================================================================== [ 30.780209] Disabling lock debugging due to kernel taint [ 32.700805] BUG: Bad rss-counter state mm:00000000cee0d5fa type:MM_FILEPAGES val:33 [ 32.701927] BUG: Bad rss-counter state mm:00000000cee0d5fa type:MM_ANONPAGES val:22 [ 33.157050] BUG: Bad rss-counter state mm:000000001c93ee95 type:MM_FILEPAGES val:33 [ 33.158184] BUG: Bad rss-counter state mm:000000001c93ee95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16787' (ECDSA) to the list of known hosts. 2023/06/21 00:14:11 fuzzer started 2023/06/21 00:14:12 dialing manager at localhost:36067 2023/06/21 00:14:12 checking machine... 2023/06/21 00:14:12 checking revisions... [ 33.838805] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:14:12 testing simple program... [ 33.885875] cgroup: Unknown subsys name 'net' [ 33.952606] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:14:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f02df9e9366 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=00007f02df9e9366 RDI=ffffffff85652c60 RBP=00007f02df9e9366 RSP=ffff88806ce09a48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88806ce09b70 R13=0000000000000000 R14=ffff88800df90000 R15=ffff88800f071670 RIP=ffffffff814c845a RFL=00000246 [---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 00007f02df4f6900 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=00007ffffeb3b000 CR3=000000000f046000 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=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=00007f97ab4d0028 CR3=000000000e7e4000 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=1be2bca9462218b7424ff2c518a5bfcb XMM02=ec2efd57dc4c00df000000000011a8a8 XMM03=5d18fe1faa454ee3000000000011a978 XMM04=cac9a56318c105b300000000000ae988 XMM05=751b9502027dc0b900000000001311e8 XMM06=627a284a243a87fb00000000001303c0 XMM07=e042d86d42eb936e0000000000121908 XMM08=5d18fe1faa454ee3000000000011a978 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000