syzkaller login: [ 31.654666] BUG: Bad rss-counter state mm:0000000097394d87 type:MM_FILEPAGES val:33 [ 31.655910] BUG: Bad rss-counter state mm:0000000097394d87 type:MM_ANONPAGES val:22 [ 31.693228] ================================================================== [ 31.694218] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.695149] Read of size 8 at addr ffff8880169495c8 by task sshd/219 [ 31.696014] [ 31.696238] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.697101] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.698108] Call Trace: [ 31.698434] <TASK> [ 31.698720] dump_stack_lvl+0x91/0xf0 [ 31.699221] print_report+0xcc/0x620 [ 31.699711] ? __virt_addr_valid+0x102/0x340 [ 31.700261] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.700871] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.701495] kasan_report+0xbe/0xf0 [ 31.701973] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.702585] vma_interval_tree_remove+0xc75/0xec0 [ 31.703181] vma_prepare+0xc54/0x11a0 [ 31.703677] __split_vma+0x5af/0x950 [ 31.704147] ? __pfx___split_vma+0x10/0x10 [ 31.704670] ? find_held_lock+0x2c/0x110 [ 31.705186] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.705746] ? lock_is_held_type+0x9f/0x120 [ 31.706303] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.706910] ? mtree_range_walk+0x632/0x900 [ 31.707473] ? mas_walk+0x5c7/0x7c0 [ 31.707946] do_vmi_munmap+0x1f1/0x2b0 [ 31.708430] mmap_region+0x1f9/0x2660 [ 31.708907] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.709411] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.710145] ? __pfx_lock_acquire+0x10/0x10 [ 31.710675] ? __pfx_mmap_region+0x10/0x10 [ 31.711227] ? security_mmap_addr+0x7d/0xa0 [ 31.711764] ? get_unmapped_area+0x1f5/0x3f0 [ 31.712310] do_mmap+0x854/0xf00 [ 31.712753] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.713250] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.713812] ksys_mmap_pgoff+0x3af/0x500 [ 31.714320] do_syscall_64+0x3f/0x90 [ 31.714794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.715442] RIP: 0033:0x7f582a68ed82 [ 31.715893] 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 [ 31.718000] RSP: 002b:00007fffdcb76438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.718888] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f582a68ed82 [ 31.719738] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5829ac8000 [ 31.720571] RBP: 00007f5829ac8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.721422] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8f6026980 [ 31.722262] R13: 00007fffdcb76450 R14: 00007fffdcb76480 R15: 00007fffdcb767e0 [ 31.723109] </TASK> [ 31.723420] [ 31.723639] Allocated by task 212: [ 31.724064] kasan_save_stack+0x22/0x50 [ 31.724566] kasan_set_track+0x25/0x30 [ 31.725052] __kasan_slab_alloc+0x59/0x70 [ 31.725585] kmem_cache_alloc+0x16b/0x370 [ 31.726095] vm_area_dup+0x20/0x160 [ 31.726550] __split_vma+0x170/0x950 [ 31.727010] split_vma+0xc6/0x110 [ 31.727458] mprotect_fixup+0x8d2/0xb30 [ 31.727949] do_mprotect_pkey+0x87e/0xd40 [ 31.728463] __x64_sys_mprotect+0x78/0xc0 [ 31.728988] do_syscall_64+0x3f/0x90 [ 31.729456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.730101] [ 31.730317] Freed by task 212: [ 31.730703] kasan_save_stack+0x22/0x50 [ 31.731201] kasan_set_track+0x25/0x30 [ 31.731718] kasan_save_free_info+0x2b/0x50 [ 31.732247] __kasan_slab_free+0x10a/0x190 [ 31.732778] kmem_cache_free+0x10d/0x4d0 [ 31.733277] rcu_core+0x8c8/0x2860 [ 31.733721] __do_softirq+0x1b7/0x7d4 [ 31.734202] [ 31.734419] Last potentially related work creation: [ 31.734997] kasan_save_stack+0x22/0x50 [ 31.735512] __kasan_record_aux_stack+0x8e/0xa0 [ 31.736079] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.736715] remove_vma+0x139/0x170 [ 31.737165] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.737713] do_vmi_munmap+0x1f1/0x2b0 [ 31.738195] __vm_munmap+0x138/0x3a0 [ 31.738669] __x64_sys_munmap+0x59/0x80 [ 31.739174] do_syscall_64+0x3f/0x90 [ 31.739669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.740320] [ 31.740539] The buggy address belongs to the object at ffff888016949570 [ 31.740539] which belongs to the cache vm_area_struct of size 168 [ 31.742017] The buggy address is located 88 bytes inside of [ 31.742017] freed 168-byte region [ffff888016949570, ffff888016949618) [ 31.743413] [ 31.743627] The buggy address belongs to the physical page: [ 31.744279] page:00000000f82ad5a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16949 [ 31.745378] memcg:ffff888019dc2701 [ 31.745806] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.746446] page_type: 0xffffffff() [ 31.746894] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.747814] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dc2701 [ 31.748731] page dumped because: kasan: bad access detected [ 31.749393] [ 31.749606] Memory state around the buggy address: [ 31.750183] ffff888016949480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.751034] ffff888016949500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.751908] >ffff888016949580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.752751] ^ [ 31.753410] ffff888016949600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.754276] ffff888016949680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.755160] ================================================================== [ 31.756206] Disabling lock debugging due to kernel taint [ 33.519539] BUG: Bad rss-counter state mm:00000000f55890c0 type:MM_FILEPAGES val:33 [ 33.520254] BUG: Bad rss-counter state mm:00000000f55890c0 type:MM_ANONPAGES val:22 [ 33.955086] BUG: Bad rss-counter state mm:0000000025861919 type:MM_FILEPAGES val:33 [ 33.956121] BUG: Bad rss-counter state mm:0000000025861919 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6523' (ECDSA) to the list of known hosts. 2023/06/20 23:05:00 fuzzer started 2023/06/20 23:05:00 dialing manager at localhost:36067 2023/06/20 23:05:00 checking machine... 2023/06/20 23:05:00 checking revisions... [ 34.674418] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:05:00 testing simple program... [ 34.714496] cgroup: Unknown subsys name 'net' [ 34.758426] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:04:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535d53 RSP=ffff88806ce09da8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000287 R13=ffffea000064b200 R14=ffffffff818d9c06 R15=ffff88800e8d1b80 RIP=ffffffff8135b955 RFL=00000086 [--S--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 00007f648ec35900 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=000055ca2545f768 CR3=0000000009b12000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=9b56efd70cc01eaa00000000000ae988 XMM05=a752b5ca72b2a2da0000000000132f58 XMM06=806171799158d9670000000000131ff8 XMM07=fb795ef6d65770560000000000122338 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800d16c59c RCX=1ffff11001a2d8a0 RDX=0000000000000000 RSI=ffff88801428a300 RDI=ffff88800d16c59c RBP=00000000000000e8 RSP=ffff888014167790 R8 =0000000000000001 R9 =ffff88800d16c59c R10=ffff88800d16c553 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800d16c5ac R14=ffff88800d16c59c R15=ffff88800d16c4c0 RIP=ffffffff844d8b6b 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 00007fcf1ddac900 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=00007ffd9ef24000 CR3=0000000019fb0000 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=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