[ 36.782474] BUG: Bad rss-counter state mm:0000000015b460ca type:MM_FILEPAGES val:33 [ 36.783991] BUG: Bad rss-counter state mm:0000000015b460ca type:MM_ANONPAGES val:22 [ 36.948827] ================================================================== [ 36.949780] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.950781] Read of size 8 at addr ffff888010162ed8 by task sshd/219 [ 36.951685] [ 36.951913] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.952825] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.953843] Call Trace: [ 36.954185] [ 36.954493] dump_stack_lvl+0x91/0xf0 [ 36.955002] print_report+0xcc/0x620 [ 36.955505] ? __virt_addr_valid+0x102/0x340 [ 36.956079] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.956732] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.957379] kasan_report+0xbe/0xf0 [ 36.957878] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.958559] vma_interval_tree_remove+0xc75/0xec0 [ 36.959194] vma_prepare+0xc54/0x11a0 [ 36.959694] __split_vma+0x5af/0x950 [ 36.960197] ? __pfx___split_vma+0x10/0x10 [ 36.960762] ? find_held_lock+0x2c/0x110 [ 36.961311] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.961891] ? lock_is_held_type+0x9f/0x120 [ 36.962466] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.963099] ? mtree_range_walk+0x632/0x900 [ 36.963668] ? mas_walk+0x5c7/0x7c0 [ 36.964160] do_vmi_munmap+0x1f1/0x2b0 [ 36.964666] mmap_region+0x1f9/0x2660 [ 36.965171] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.965708] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.966463] ? __pfx_lock_acquire+0x10/0x10 [ 36.967027] ? __pfx_mmap_region+0x10/0x10 [ 36.967586] ? security_mmap_addr+0x7d/0xa0 [ 36.968137] ? get_unmapped_area+0x1f5/0x3f0 [ 36.968713] do_mmap+0x854/0xf00 [ 36.969169] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.969682] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.970264] ksys_mmap_pgoff+0x3af/0x500 [ 36.970821] do_syscall_64+0x3f/0x90 [ 36.971318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.972009] RIP: 0033:0x7f2c38e8cd82 [ 36.972485] 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 [ 36.974723] RSP: 002b:00007ffe1b4c1c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.975670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c38e8cd82 [ 36.976564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c382c6000 [ 36.977466] RBP: 00007f2c382c6000 R08: 0000000000000009 R09: 0000000000001000 [ 36.978355] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f213fd980 [ 36.979252] R13: 00007ffe1b4c1c80 R14: 00007ffe1b4c1cb0 R15: 00007ffe1b4c2010 [ 36.980145] [ 36.980447] [ 36.980667] Allocated by task 211: [ 36.981115] kasan_save_stack+0x22/0x50 [ 36.981646] kasan_set_track+0x25/0x30 [ 36.982167] __kasan_slab_alloc+0x59/0x70 [ 36.982727] kmem_cache_alloc+0x16b/0x370 [ 36.983261] vm_area_dup+0x20/0x160 [ 36.983732] __split_vma+0x170/0x950 [ 36.984218] split_vma+0xc6/0x110 [ 36.984677] mprotect_fixup+0x8d2/0xb30 [ 36.985201] do_mprotect_pkey+0x87e/0xd40 [ 36.985750] __x64_sys_mprotect+0x78/0xc0 [ 36.986305] do_syscall_64+0x3f/0x90 [ 36.986803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.987470] [ 36.987693] Freed by task 13: [ 36.988093] kasan_save_stack+0x22/0x50 [ 36.988620] kasan_set_track+0x25/0x30 [ 36.989131] kasan_save_free_info+0x2b/0x50 [ 36.989686] __kasan_slab_free+0x10a/0x190 [ 36.990234] kmem_cache_free+0x10d/0x4d0 [ 36.990794] rcu_core+0x8c8/0x2860 [ 36.991261] __do_softirq+0x1b7/0x7d4 [ 36.991764] [ 36.991989] Last potentially related work creation: [ 36.992621] kasan_save_stack+0x22/0x50 [ 36.993144] __kasan_record_aux_stack+0x8e/0xa0 [ 36.993743] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.994421] remove_vma+0x139/0x170 [ 36.994893] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.995484] do_vmi_munmap+0x1f1/0x2b0 [ 36.995997] __vm_munmap+0x138/0x3a0 [ 36.996479] __x64_sys_munmap+0x59/0x80 [ 36.997006] do_syscall_64+0x3f/0x90 [ 36.997509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.998173] [ 36.998411] Second to last potentially related work creation: [ 36.999140] kasan_save_stack+0x22/0x50 [ 36.999674] __kasan_record_aux_stack+0x8e/0xa0 [ 37.000278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.000947] remove_vma+0x139/0x170 [ 37.001426] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.002013] do_vmi_munmap+0x1f1/0x2b0 [ 37.002535] mmap_region+0x1f9/0x2660 [ 37.003035] do_mmap+0x854/0xf00 [ 37.003481] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.003992] ksys_mmap_pgoff+0x3af/0x500 [ 37.004517] do_syscall_64+0x3f/0x90 [ 37.005016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.005689] [ 37.005913] The buggy address belongs to the object at ffff888010162e80 [ 37.005913] which belongs to the cache vm_area_struct of size 168 [ 37.007470] The buggy address is located 88 bytes inside of [ 37.007470] freed 168-byte region [ffff888010162e80, ffff888010162f28) [ 37.008944] [ 37.009169] The buggy address belongs to the physical page: [ 37.009855] page:000000000d8bb608 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10162 [ 37.011021] memcg:ffff88800d2edc01 [ 37.011469] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.012199] page_type: 0xffffffff() [ 37.012672] raw: 0100000000000200 ffff88800879fc80 ffffea0000375ec0 dead000000000003 [ 37.013645] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2edc01 [ 37.014619] page dumped because: kasan: bad access detected [ 37.015308] [ 37.015528] Memory state around the buggy address: [ 37.016150] ffff888010162d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.017058] ffff888010162e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 37.017985] >ffff888010162e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.018904] ^ [ 37.019671] ffff888010162f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 37.020577] ffff888010162f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.021484] ================================================================== [ 37.022643] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.816124] BUG: Bad rss-counter state mm:00000000279486f9 type:MM_FILEPAGES val:33 [ 38.816880] BUG: Bad rss-counter state mm:00000000279486f9 type:MM_ANONPAGES val:22 [ 39.193491] BUG: Bad rss-counter state mm:000000008b8b7f8e type:MM_FILEPAGES val:33 [ 39.194586] BUG: Bad rss-counter state mm:000000008b8b7f8e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63495' (ECDSA) to the list of known hosts. 2023/06/20 03:39:22 fuzzer started 2023/06/20 03:39:23 dialing manager at localhost:44161 2023/06/20 03:39:23 checking machine... 2023/06/20 03:39:23 checking revisions... [ 39.842703] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:39:23 testing simple program... [ 39.876417] cgroup: Unknown subsys name 'net' [ 39.912201] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:39:10 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88800e857468 RSI=ffff88800e857438 RDI=ffff88800e8570d8 RBP=ffff88800e857170 RSP=ffff88800e8570d0 R8 =0000000000000001 R9 =ffff88800e857118 R10=0000000000038001 R11=00000000000b3b3c R12=ffff88800e8571a0 R13=0000000000000000 R14=ffff88801709b680 R15=ffff888016137130 RIP=ffffffff81130340 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 00007feddc506900 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=00007feddc4d0008 CR3=0000000016bca000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f1f1d6328e0 CR3=0000000010380000 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=2032323a39333a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a39333a3330203032 XMM08=00007f00940047e00000006600000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000