[ 32.126299] BUG: Bad rss-counter state mm:00000000895ca1c9 type:MM_FILEPAGES val:33 [ 32.127552] BUG: Bad rss-counter state mm:00000000895ca1c9 type:MM_ANONPAGES val:22 [ 32.167574] ================================================================== [ 32.168602] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.169541] Read of size 8 at addr ffff88800cf9c140 by task sshd/219 [ 32.170301] [ 32.170516] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.171398] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.172354] Call Trace: [ 32.172675] [ 32.172955] dump_stack_lvl+0x91/0xf0 [ 32.173438] print_report+0xcc/0x620 [ 32.173915] ? __virt_addr_valid+0x102/0x340 [ 32.174457] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.175077] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.175685] kasan_report+0xbe/0xf0 [ 32.176159] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.176775] vma_interval_tree_remove+0xc75/0xec0 [ 32.177367] vma_prepare+0xc54/0x11a0 [ 32.177846] __split_vma+0x5af/0x950 [ 32.178322] ? __pfx___split_vma+0x10/0x10 [ 32.178873] ? find_held_lock+0x2c/0x110 [ 32.179388] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.179954] ? lock_is_held_type+0x9f/0x120 [ 32.180494] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.181092] ? mtree_range_walk+0x632/0x900 [ 32.181633] ? mas_walk+0x5c7/0x7c0 [ 32.182101] do_vmi_munmap+0x1f1/0x2b0 [ 32.182595] mmap_region+0x1f9/0x2660 [ 32.183081] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.183597] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.184317] ? __pfx_lock_acquire+0x10/0x10 [ 32.184857] ? __pfx_mmap_region+0x10/0x10 [ 32.185389] ? security_mmap_addr+0x7d/0xa0 [ 32.185919] ? get_unmapped_area+0x1f5/0x3f0 [ 32.186465] do_mmap+0x854/0xf00 [ 32.186914] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.187411] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.187971] ksys_mmap_pgoff+0x3af/0x500 [ 32.188475] do_syscall_64+0x3f/0x90 [ 32.188948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.189585] RIP: 0033:0x7f0fa8215d82 [ 32.190046] 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 [ 32.192198] RSP: 002b:00007fffb1228438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.193116] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0fa8215d82 [ 32.193974] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0fa764f000 [ 32.194829] RBP: 00007f0fa764f000 R08: 0000000000000009 R09: 0000000000001000 [ 32.195673] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f013937ec0 [ 32.196520] R13: 00007fffb1228450 R14: 00007fffb1228480 R15: 00007fffb12287e0 [ 32.197382] [ 32.197668] [ 32.197882] Allocated by task 211: [ 32.198337] kasan_save_stack+0x22/0x50 [ 32.198871] kasan_set_track+0x25/0x30 [ 32.199362] __kasan_slab_alloc+0x59/0x70 [ 32.199908] kmem_cache_alloc+0x16b/0x370 [ 32.200434] vm_area_dup+0x20/0x160 [ 32.200899] __split_vma+0x170/0x950 [ 32.201371] split_vma+0xc6/0x110 [ 32.201826] mprotect_fixup+0x8d2/0xb30 [ 32.202326] do_mprotect_pkey+0x87e/0xd40 [ 32.202884] __x64_sys_mprotect+0x78/0xc0 [ 32.203402] do_syscall_64+0x3f/0x90 [ 32.203885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.204537] [ 32.204757] Freed by task 211: [ 32.205153] kasan_save_stack+0x22/0x50 [ 32.205674] kasan_set_track+0x25/0x30 [ 32.206176] kasan_save_free_info+0x2b/0x50 [ 32.206741] __kasan_slab_free+0x10a/0x190 [ 32.207277] kmem_cache_free+0x10d/0x4d0 [ 32.207784] rcu_core+0x8c8/0x2860 [ 32.208244] __do_softirq+0x1b7/0x7d4 [ 32.208736] [ 32.208952] Last potentially related work creation: [ 32.209552] kasan_save_stack+0x22/0x50 [ 32.210055] __kasan_record_aux_stack+0x8e/0xa0 [ 32.210646] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.211297] remove_vma+0x139/0x170 [ 32.211748] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.212311] do_vmi_munmap+0x1f1/0x2b0 [ 32.212803] __vm_munmap+0x138/0x3a0 [ 32.213268] __x64_sys_munmap+0x59/0x80 [ 32.213776] do_syscall_64+0x3f/0x90 [ 32.214246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.214893] [ 32.215109] The buggy address belongs to the object at ffff88800cf9c0e8 [ 32.215109] which belongs to the cache vm_area_struct of size 168 [ 32.216576] The buggy address is located 88 bytes inside of [ 32.216576] freed 168-byte region [ffff88800cf9c0e8, ffff88800cf9c190) [ 32.217977] [ 32.218192] The buggy address belongs to the physical page: [ 32.218861] page:00000000c145a994 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcf9c [ 32.219938] memcg:ffff888014562d01 [ 32.220361] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.221009] page_type: 0xffffffff() [ 32.221462] raw: 0100000000000200 ffff88800879fc80 ffffea0000326c00 000000000000000e [ 32.222376] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014562d01 [ 32.223297] page dumped because: kasan: bad access detected [ 32.223953] [ 32.224170] Memory state around the buggy address: [ 32.224756] ffff88800cf9c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.225613] ffff88800cf9c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.226494] >ffff88800cf9c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.227350] ^ [ 32.227985] ffff88800cf9c180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 32.228849] ffff88800cf9c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.229703] ================================================================== [ 32.230836] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.995411] BUG: Bad rss-counter state mm:00000000611b558b type:MM_FILEPAGES val:33 [ 34.996473] BUG: Bad rss-counter state mm:00000000611b558b type:MM_ANONPAGES val:22 [ 35.476019] BUG: Bad rss-counter state mm:00000000ea49c0f7 type:MM_FILEPAGES val:33 [ 35.477251] BUG: Bad rss-counter state mm:00000000ea49c0f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24397' (ECDSA) to the list of known hosts. 2023/06/20 06:10:12 fuzzer started 2023/06/20 06:10:12 dialing manager at localhost:44161 2023/06/20 06:10:12 checking machine... 2023/06/20 06:10:12 checking revisions... [ 36.257550] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:10:13 testing simple program... [ 36.301256] cgroup: Unknown subsys name 'net' [ 36.342499] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:10:11 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000000 RCX=ffffffff818e84c0 RDX=ffff8880197a8000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888015cd4ca0 RSP=ffff88800eedfd90 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800dfd9400 R13=ffff888015cd4ba0 R14=ffff888015cd4ba8 R15=dffffc0000000000 RIP=ffffffff814c01e1 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 00007f94e1894900 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=00007ffe83c1d000 CR3=0000000018344000 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=00007fcd08d7a400 CR3=000000000c988000 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=9ba44cb1064a2fa40e48e6cb27fd692a XMM02=000000000011e4c8ec2efd57dc4c00df XMM03=00000000001246f00572ab9181bf932a XMM04=e9978c5bbe84130100000000000ae988 XMM05=980f4159a38782a00000000000134df8 XMM06=806171799158d9670000000000133eb0 XMM07=e042d86d42eb936e00000000001249c8 XMM08=0572ab9181bf932a000000000011e528 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000