syzkaller login: [ 52.984248] BUG: Bad rss-counter state mm:00000000ee335eaf type:MM_FILEPAGES val:33 [ 52.985620] BUG: Bad rss-counter state mm:00000000ee335eaf type:MM_ANONPAGES val:22 [ 53.104886] ================================================================== [ 53.105831] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 53.106772] Read of size 8 at addr ffff8880097ca058 by task sshd/221 [ 53.107640] [ 53.107883] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 53.108765] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 53.109738] Call Trace: [ 53.110054] [ 53.110336] dump_stack_lvl+0x91/0xf0 [ 53.110820] print_report+0xcc/0x620 [ 53.111328] ? __virt_addr_valid+0x102/0x340 [ 53.111886] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.112496] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.113118] kasan_report+0xbe/0xf0 [ 53.113585] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.114202] vma_interval_tree_remove+0xc75/0xec0 [ 53.114801] vma_prepare+0xc54/0x11a0 [ 53.115275] __split_vma+0x5af/0x950 [ 53.115757] ? __pfx___split_vma+0x10/0x10 [ 53.116286] ? find_held_lock+0x2c/0x110 [ 53.116808] do_vmi_align_munmap+0x2ba/0x11f0 [ 53.117373] ? lock_is_held_type+0x9f/0x120 [ 53.117907] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 53.118509] ? mtree_range_walk+0x632/0x900 [ 53.119059] ? mas_walk+0x5c7/0x7c0 [ 53.119549] do_vmi_munmap+0x1f1/0x2b0 [ 53.120044] mmap_region+0x1f9/0x2660 [ 53.120529] ? vm_mmap_pgoff+0x15c/0x3a0 [ 53.121033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 53.121745] ? __pfx_lock_acquire+0x10/0x10 [ 53.122280] ? __pfx_mmap_region+0x10/0x10 [ 53.122805] ? security_mmap_addr+0x7d/0xa0 [ 53.123349] ? get_unmapped_area+0x1f5/0x3f0 [ 53.123892] do_mmap+0x854/0xf00 [ 53.124327] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.124815] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 53.125384] ksys_mmap_pgoff+0x3af/0x500 [ 53.125887] do_syscall_64+0x3f/0x90 [ 53.126362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.127002] RIP: 0033:0x7f754dde8d82 [ 53.127460] 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 [ 53.129552] RSP: 002b:00007ffc89b46dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 53.130447] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f754dde8d82 [ 53.131322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f754d222000 [ 53.132185] RBP: 00007f754d222000 R08: 0000000000000009 R09: 0000000000001000 [ 53.133031] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562458efcb20 [ 53.133867] R13: 00007ffc89b46df0 R14: 00007ffc89b46e20 R15: 00007ffc89b47180 [ 53.134729] [ 53.135018] [ 53.135239] Allocated by task 214: [ 53.135675] kasan_save_stack+0x22/0x50 [ 53.136179] kasan_set_track+0x25/0x30 [ 53.136675] __kasan_slab_alloc+0x59/0x70 [ 53.137197] kmem_cache_alloc+0x16b/0x370 [ 53.137716] vm_area_dup+0x20/0x160 [ 53.138163] __split_vma+0x170/0x950 [ 53.138624] split_vma+0xc6/0x110 [ 53.139067] mprotect_fixup+0x8d2/0xb30 [ 53.139580] do_mprotect_pkey+0x87e/0xd40 [ 53.140102] __x64_sys_mprotect+0x78/0xc0 [ 53.140619] do_syscall_64+0x3f/0x90 [ 53.141112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.141779] [ 53.142005] Freed by task 214: [ 53.142407] kasan_save_stack+0x22/0x50 [ 53.142922] kasan_set_track+0x25/0x30 [ 53.143451] kasan_save_free_info+0x2b/0x50 [ 53.144008] __kasan_slab_free+0x10a/0x190 [ 53.144558] kmem_cache_free+0x10d/0x4d0 [ 53.145087] rcu_core+0x8c8/0x2860 [ 53.145550] __do_softirq+0x1b7/0x7d4 [ 53.146042] [ 53.146267] Last potentially related work creation: [ 53.146873] kasan_save_stack+0x22/0x50 [ 53.147406] __kasan_record_aux_stack+0x8e/0xa0 [ 53.147999] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.148664] remove_vma+0x139/0x170 [ 53.149134] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.149732] do_vmi_munmap+0x1f1/0x2b0 [ 53.150237] __vm_munmap+0x138/0x3a0 [ 53.150725] __x64_sys_munmap+0x59/0x80 [ 53.151250] do_syscall_64+0x3f/0x90 [ 53.151764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.152431] [ 53.152653] The buggy address belongs to the object at ffff8880097ca000 [ 53.152653] which belongs to the cache vm_area_struct of size 168 [ 53.154188] The buggy address is located 88 bytes inside of [ 53.154188] freed 168-byte region [ffff8880097ca000, ffff8880097ca0a8) [ 53.155677] [ 53.155897] The buggy address belongs to the physical page: [ 53.156578] page:0000000084fc8e17 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97ca [ 53.157710] memcg:ffff8880099d1b01 [ 53.158154] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 53.158876] page_type: 0xffffffff() [ 53.159362] raw: 0100000000000200 ffff88800879fc80 ffffea000037cac0 dead000000000007 [ 53.160314] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099d1b01 [ 53.161252] page dumped because: kasan: bad access detected [ 53.161940] [ 53.162162] Memory state around the buggy address: [ 53.162763] ffff8880097c9f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 53.163668] ffff8880097c9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 53.164552] >ffff8880097ca000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.165433] ^ [ 53.166186] ffff8880097ca080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 53.167076] ffff8880097ca100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.167985] ================================================================== [ 53.169151] Disabling lock debugging due to kernel taint [ 55.560232] BUG: Bad rss-counter state mm:00000000a6041482 type:MM_FILEPAGES val:33 [ 55.561229] BUG: Bad rss-counter state mm:00000000a6041482 type:MM_ANONPAGES val:22 [ 56.051186] BUG: Bad rss-counter state mm:00000000bf77f414 type:MM_FILEPAGES val:33 [ 56.052389] BUG: Bad rss-counter state mm:00000000bf77f414 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17157' (ECDSA) to the list of known hosts. 2023/06/19 21:04:44 fuzzer started 2023/06/19 21:04:45 dialing manager at localhost:44161 2023/06/19 21:04:45 checking machine... 2023/06/19 21:04:45 checking revisions... [ 56.806297] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:04:45 testing simple program... [ 56.851822] cgroup: Unknown subsys name 'net' [ 56.893553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:04:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c76fb00 RCX=ffff888008441640 RDX=ffffea000039b400 RSI=ffff88800e6d0f00 RDI=ffff888008441640 RBP=0000000000000000 RSP=ffff88800d9cfa38 R8 =ffff88800e6d0c00 R9 =0000000000000000 R10=ffffea000039b400 R11=0000000000200016 R12=dffffc0000000000 R13=ffff88800d9cfa78 R14=ffff888008441640 R15=ffff88800e6d0f00 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007f2a2ee95900 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=00007fffcf839000 CR3=000000000f27a000 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=00007f254bec0f10 CR3=000000000ca68000 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=cfe48cb8e8a31f8d1048aeb8d3086298 XMM02=000000000011cd20eff9b2d0a8fce9cb XMM03=000000000011cdf02c67c8bc2e329bc3 XMM04=2160238d5aa3850b00000000000ae988 XMM05=59d5b690e0af863b0000000000133d00 XMM06=45fee5d6e0c3f1f00000000000132b68 XMM07=e042d86d42eb936e0000000000124478 XMM08=5156f5cc900f0388000000000011cdf0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000