[ 26.177411] BUG: Bad rss-counter state mm:000000001e34edb5 type:MM_FILEPAGES val:33 [ 26.179615] BUG: Bad rss-counter state mm:000000001e34edb5 type:MM_ANONPAGES val:22 [ 26.346614] ================================================================== [ 26.347860] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.349320] Read of size 8 at addr ffff88801bc894e0 by task sshd/219 [ 26.350346] [ 26.350643] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.351790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.352888] Call Trace: [ 26.353260] [ 26.353577] dump_stack_lvl+0x91/0xf0 [ 26.354127] print_report+0xcc/0x620 [ 26.354662] ? __virt_addr_valid+0x102/0x340 [ 26.355285] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.355980] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.356688] kasan_report+0xbe/0xf0 [ 26.357222] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.357949] vma_interval_tree_remove+0xc75/0xec0 [ 26.358646] vma_prepare+0xc54/0x11a0 [ 26.359202] __split_vma+0x5af/0x950 [ 26.359748] ? __pfx___split_vma+0x10/0x10 [ 26.360369] ? find_held_lock+0x2c/0x110 [ 26.361006] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.361668] ? lock_is_held_type+0x9f/0x120 [ 26.362288] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.362994] ? mtree_range_walk+0x632/0x900 [ 26.363635] ? mas_walk+0x5c7/0x7c0 [ 26.364189] do_vmi_munmap+0x1f1/0x2b0 [ 26.364773] mmap_region+0x1f9/0x2660 [ 26.365342] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.365941] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.366769] ? __pfx_lock_acquire+0x10/0x10 [ 26.367363] ? __pfx_mmap_region+0x10/0x10 [ 26.367963] ? security_mmap_addr+0x7d/0xa0 [ 26.368552] ? get_unmapped_area+0x1f5/0x3f0 [ 26.369194] do_mmap+0x854/0xf00 [ 26.369683] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.370243] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.370885] ksys_mmap_pgoff+0x3af/0x500 [ 26.371459] do_syscall_64+0x3f/0x90 [ 26.371999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.372727] RIP: 0033:0x7fcb3142cd82 [ 26.373208] 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 [ 26.375365] RSP: 002b:00007ffe735616e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.376278] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb3142cd82 [ 26.377172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb30866000 [ 26.378031] RBP: 00007fcb30866000 R08: 0000000000000009 R09: 0000000000001000 [ 26.378898] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb60c6aec0 [ 26.379757] R13: 00007ffe73561700 R14: 00007ffe73561730 R15: 00007ffe73561a90 [ 26.380647] [ 26.380944] [ 26.381160] Allocated by task 209: [ 26.381601] kasan_save_stack+0x22/0x50 [ 26.382125] kasan_set_track+0x25/0x30 [ 26.382627] __kasan_slab_alloc+0x59/0x70 [ 26.383160] kmem_cache_alloc+0x16b/0x370 [ 26.383692] vm_area_dup+0x20/0x160 [ 26.384150] __split_vma+0x170/0x950 [ 26.384650] split_vma+0xc6/0x110 [ 26.385099] mprotect_fixup+0x8d2/0xb30 [ 26.385615] do_mprotect_pkey+0x87e/0xd40 [ 26.386145] __x64_sys_mprotect+0x78/0xc0 [ 26.386669] do_syscall_64+0x3f/0x90 [ 26.387151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.387808] [ 26.388025] Freed by task 209: [ 26.388427] kasan_save_stack+0x22/0x50 [ 26.389060] kasan_set_track+0x25/0x30 [ 26.389564] kasan_save_free_info+0x2b/0x50 [ 26.390108] __kasan_slab_free+0x10a/0x190 [ 26.390645] kmem_cache_free+0x10d/0x4d0 [ 26.391154] rcu_core+0x8c8/0x2860 [ 26.391608] __do_softirq+0x1b7/0x7d4 [ 26.392084] [ 26.392306] Last potentially related work creation: [ 26.392914] kasan_save_stack+0x22/0x50 [ 26.393424] __kasan_record_aux_stack+0x8e/0xa0 [ 26.394006] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.394665] remove_vma+0x139/0x170 [ 26.395121] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.395679] do_vmi_munmap+0x1f1/0x2b0 [ 26.396170] __vm_munmap+0x138/0x3a0 [ 26.396665] __x64_sys_munmap+0x59/0x80 [ 26.397169] do_syscall_64+0x3f/0x90 [ 26.397652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.398306] [ 26.398522] The buggy address belongs to the object at ffff88801bc89488 [ 26.398522] which belongs to the cache vm_area_struct of size 168 [ 26.399998] The buggy address is located 88 bytes inside of [ 26.399998] freed 168-byte region [ffff88801bc89488, ffff88801bc89530) [ 26.401447] [ 26.401663] The buggy address belongs to the physical page: [ 26.402337] page:00000000c22c9564 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc89 [ 26.403448] memcg:ffff88801bc77301 [ 26.403876] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.404520] page_type: 0xffffffff() [ 26.405002] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.405937] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc77301 [ 26.406857] page dumped because: kasan: bad access detected [ 26.407528] [ 26.407743] Memory state around the buggy address: [ 26.408329] ffff88801bc89380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.409203] ffff88801bc89400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 26.410067] >ffff88801bc89480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.410928] ^ [ 26.411693] ffff88801bc89500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 26.412558] ffff88801bc89580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.413428] ================================================================== [ 26.414386] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.085333] BUG: Bad rss-counter state mm:0000000073e412ff type:MM_FILEPAGES val:33 [ 29.087464] BUG: Bad rss-counter state mm:0000000073e412ff type:MM_ANONPAGES val:22 [ 29.527369] BUG: Bad rss-counter state mm:000000003c0fbb7d type:MM_FILEPAGES val:33 [ 29.528827] BUG: Bad rss-counter state mm:000000003c0fbb7d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50911' (ECDSA) to the list of known hosts. 2023/06/19 13:27:03 fuzzer started 2023/06/19 13:27:03 dialing manager at localhost:44161 2023/06/19 13:27:03 checking machine... 2023/06/19 13:27:03 checking revisions... [ 30.139753] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:27:03 testing simple program... [ 30.212525] cgroup: Unknown subsys name 'net' [ 30.266823] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:27:01 Registers: info registers vcpu 0 RAX=ffffffff863b1c9b RBX=0000000000000001 RCX=ffffffff863b1c96 RDX=dffffc0000000000 RSI=ffffffff863b1c9a RDI=ffffffff863b1c9b RBP=ffff888019a5f980 RSP=ffff888019a5f8b8 R8 =ffffffff863b1c9a R9 =ffff888019a5f968 R10=0000000000038001 R11=000000000008a977 R12=ffff888019a5f988 R13=ffff888019a5f970 R14=ffff888019a5f969 R15=ffff888019a5f928 RIP=ffffffff81130a98 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 00007f84dd45f900 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=00007f84dda170b0 CR3=0000000009a94000 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=2033303a37323a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a37323a3331203931 XMM08=3d656e696c646d632022656369767265 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=00007ff6f37dd090 CR3=000000000d736000 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=86be52d26d733392824140e47fa094ab XMM02=000000000011d1a8eff9b2d0a8fce9cb XMM03=000000000011d2782c67c8bc2e329bc3 XMM04=facd0e805da5b68900000000000ae988 XMM05=07cb4b6cd223fd8b0000000000134070 XMM06=806171799158d96700000000001336f8 XMM07=e042d86d42eb936e0000000000123230 XMM08=456e94d31d159187000000000011d278 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000