[ 33.598710] BUG: Bad rss-counter state mm:00000000110191bf type:MM_FILEPAGES val:33 [ 33.599899] BUG: Bad rss-counter state mm:00000000110191bf type:MM_ANONPAGES val:22 [ 33.744740] ================================================================== [ 33.745686] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.746833] Read of size 8 at addr ffff88800dfcc4e0 by task sshd/219 [ 33.747633] [ 33.747851] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.748735] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.749716] Call Trace: [ 33.750035] [ 33.750326] dump_stack_lvl+0x91/0xf0 [ 33.750836] print_report+0xcc/0x620 [ 33.751354] ? __virt_addr_valid+0x102/0x340 [ 33.751917] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.752541] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.753153] kasan_report+0xbe/0xf0 [ 33.753630] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.754246] vma_interval_tree_remove+0xc75/0xec0 [ 33.754849] vma_prepare+0xc54/0x11a0 [ 33.755348] __split_vma+0x5af/0x950 [ 33.755826] ? __pfx___split_vma+0x10/0x10 [ 33.756364] ? find_held_lock+0x2c/0x110 [ 33.756888] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.757460] ? lock_is_held_type+0x9f/0x120 [ 33.758015] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.758632] ? mtree_range_walk+0x632/0x900 [ 33.759195] ? mas_walk+0x5c7/0x7c0 [ 33.759677] do_vmi_munmap+0x1f1/0x2b0 [ 33.760178] mmap_region+0x1f9/0x2660 [ 33.760668] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.761187] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.761919] ? __pfx_lock_acquire+0x10/0x10 [ 33.762457] ? __pfx_mmap_region+0x10/0x10 [ 33.762996] ? security_mmap_addr+0x7d/0xa0 [ 33.763558] ? get_unmapped_area+0x1f5/0x3f0 [ 33.764116] do_mmap+0x854/0xf00 [ 33.764561] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.765064] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.765631] ksys_mmap_pgoff+0x3af/0x500 [ 33.766141] do_syscall_64+0x3f/0x90 [ 33.766628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.767294] RIP: 0033:0x7f4b210c2d82 [ 33.767757] 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 [ 33.769900] RSP: 002b:00007ffcf4fe1b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.770824] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b210c2d82 [ 33.771694] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b204fc000 [ 33.772552] RBP: 00007f4b204fc000 R08: 0000000000000009 R09: 0000000000001000 [ 33.773412] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c25a08ec0 [ 33.774275] R13: 00007ffcf4fe1ba0 R14: 00007ffcf4fe1bd0 R15: 00007ffcf4fe1f30 [ 33.775158] [ 33.775456] [ 33.775679] Allocated by task 212: [ 33.776113] kasan_save_stack+0x22/0x50 [ 33.776624] kasan_set_track+0x25/0x30 [ 33.777130] __kasan_slab_alloc+0x59/0x70 [ 33.777663] kmem_cache_alloc+0x16b/0x370 [ 33.778185] vm_area_dup+0x20/0x160 [ 33.778651] __split_vma+0x170/0x950 [ 33.779135] split_vma+0xc6/0x110 [ 33.779591] mprotect_fixup+0x8d2/0xb30 [ 33.780104] do_mprotect_pkey+0x87e/0xd40 [ 33.780643] __x64_sys_mprotect+0x78/0xc0 [ 33.781173] do_syscall_64+0x3f/0x90 [ 33.781685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.782325] [ 33.782541] Freed by task 212: [ 33.782944] kasan_save_stack+0x22/0x50 [ 33.783484] kasan_set_track+0x25/0x30 [ 33.783984] kasan_save_free_info+0x2b/0x50 [ 33.784542] __kasan_slab_free+0x10a/0x190 [ 33.785082] kmem_cache_free+0x10d/0x4d0 [ 33.785594] rcu_core+0x8c8/0x2860 [ 33.786051] __do_softirq+0x1b7/0x7d4 [ 33.786541] [ 33.786763] Last potentially related work creation: [ 33.787404] kasan_save_stack+0x22/0x50 [ 33.787971] __kasan_record_aux_stack+0x8e/0xa0 [ 33.788554] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.789212] remove_vma+0x139/0x170 [ 33.789670] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.790330] do_vmi_munmap+0x1f1/0x2b0 [ 33.790846] __vm_munmap+0x138/0x3a0 [ 33.791372] __x64_sys_munmap+0x59/0x80 [ 33.791885] do_syscall_64+0x3f/0x90 [ 33.792378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.793039] [ 33.793259] The buggy address belongs to the object at ffff88800dfcc488 [ 33.793259] which belongs to the cache vm_area_struct of size 168 [ 33.794745] The buggy address is located 88 bytes inside of [ 33.794745] freed 168-byte region [ffff88800dfcc488, ffff88800dfcc530) [ 33.796211] [ 33.796433] The buggy address belongs to the physical page: [ 33.797088] page:00000000a3cbf26d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfcc [ 33.798196] memcg:ffff88800eb2d501 [ 33.798631] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.799358] page_type: 0xffffffff() [ 33.799810] raw: 0100000000000200 ffff88800879fc80 ffffea0000262ec0 0000000000000003 [ 33.800765] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb2d501 [ 33.801680] page dumped because: kasan: bad access detected [ 33.802345] [ 33.802571] Memory state around the buggy address: [ 33.803162] ffff88800dfcc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.804024] ffff88800dfcc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.804885] >ffff88800dfcc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.805758] ^ [ 33.806528] ffff88800dfcc500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 33.807411] ffff88800dfcc580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.808258] ================================================================== [ 33.809330] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.689070] BUG: Bad rss-counter state mm:00000000793084a6 type:MM_FILEPAGES val:33 [ 35.690621] BUG: Bad rss-counter state mm:00000000793084a6 type:MM_ANONPAGES val:22 [ 36.113312] BUG: Bad rss-counter state mm:00000000011dc0e4 type:MM_FILEPAGES val:33 [ 36.114373] BUG: Bad rss-counter state mm:00000000011dc0e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25180' (ECDSA) to the list of known hosts. 2023/06/20 03:16:00 fuzzer started 2023/06/20 03:16:00 dialing manager at localhost:44161 2023/06/20 03:16:00 checking machine... 2023/06/20 03:16:00 checking revisions... [ 36.788070] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:16:00 testing simple program... [ 36.838710] cgroup: Unknown subsys name 'net' [ 36.877209] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:15:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffedac3a418 CR3=000000000ffd6000 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=2030303a36313a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a35313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea000038da00 RBX=ffff88800e368130 RCX=ffffea0000000000 RDX=ffff88800844f780 RSI=ffffffff813782a8 RDI=ffff88800844f780 RBP=ffff88806cf09e58 RSP=ffff88806cf09e30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=ffff88808e368130 R14=ffffffff813782a8 R15=ffff88800e3681b0 RIP=ffffffff818098cf RFL=00000286 [--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 00007f09e0893900 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=00007fff5f1e2000 CR3=000000000f222000 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