[ 24.082172] BUG: Bad rss-counter state mm:00000000db1e96b6 type:MM_FILEPAGES val:33 [ 24.083485] BUG: Bad rss-counter state mm:00000000db1e96b6 type:MM_ANONPAGES val:22 [ 24.233860] ================================================================== [ 24.234964] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.236082] Read of size 8 at addr ffff88800d625058 by task sshd/219 [ 24.237233] [ 24.237482] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.238358] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.239347] Call Trace: [ 24.239667] [ 24.239956] dump_stack_lvl+0x91/0xf0 [ 24.240469] print_report+0xcc/0x620 [ 24.240979] ? __virt_addr_valid+0x102/0x340 [ 24.241544] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.242162] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.242787] kasan_report+0xbe/0xf0 [ 24.243263] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.243894] vma_interval_tree_remove+0xc75/0xec0 [ 24.244524] vma_prepare+0xc54/0x11a0 [ 24.245038] __split_vma+0x5af/0x950 [ 24.245516] ? __pfx___split_vma+0x10/0x10 [ 24.246053] ? find_held_lock+0x2c/0x110 [ 24.246584] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.247150] ? lock_is_held_type+0x9f/0x120 [ 24.247692] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.248299] ? mtree_range_walk+0x632/0x900 [ 24.248900] ? mas_walk+0x5c7/0x7c0 [ 24.249381] do_vmi_munmap+0x1f1/0x2b0 [ 24.249882] mmap_region+0x1f9/0x2660 [ 24.250375] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.250898] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.251612] ? __pfx_lock_acquire+0x10/0x10 [ 24.252147] ? __pfx_mmap_region+0x10/0x10 [ 24.252697] ? security_mmap_addr+0x7d/0xa0 [ 24.253251] ? get_unmapped_area+0x1f5/0x3f0 [ 24.253801] do_mmap+0x854/0xf00 [ 24.254239] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.254737] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.255299] ksys_mmap_pgoff+0x3af/0x500 [ 24.255806] do_syscall_64+0x3f/0x90 [ 24.256286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.256984] RIP: 0033:0x7f34c867fd82 [ 24.257445] 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 [ 24.259570] RSP: 002b:00007ffe20598628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.260488] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34c867fd82 [ 24.261362] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f34c7ab9000 [ 24.262217] RBP: 00007f34c7ab9000 R08: 0000000000000009 R09: 0000000000001000 [ 24.263079] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a889f9b20 [ 24.263934] R13: 00007ffe20598640 R14: 00007ffe20598670 R15: 00007ffe205989d0 [ 24.264833] [ 24.265133] [ 24.265350] Allocated by task 212: [ 24.265782] kasan_save_stack+0x22/0x50 [ 24.266298] kasan_set_track+0x25/0x30 [ 24.266802] __kasan_slab_alloc+0x59/0x70 [ 24.267329] kmem_cache_alloc+0x16b/0x370 [ 24.267853] vm_area_dup+0x20/0x160 [ 24.268311] __split_vma+0x170/0x950 [ 24.268831] split_vma+0xc6/0x110 [ 24.269285] mprotect_fixup+0x8d2/0xb30 [ 24.269803] do_mprotect_pkey+0x87e/0xd40 [ 24.270339] __x64_sys_mprotect+0x78/0xc0 [ 24.270868] do_syscall_64+0x3f/0x90 [ 24.271346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.271996] [ 24.272214] Freed by task 212: [ 24.272619] kasan_save_stack+0x22/0x50 [ 24.273157] kasan_set_track+0x25/0x30 [ 24.273655] kasan_save_free_info+0x2b/0x50 [ 24.274191] __kasan_slab_free+0x10a/0x190 [ 24.274722] kmem_cache_free+0x10d/0x4d0 [ 24.275230] rcu_core+0x8c8/0x2860 [ 24.275678] __do_softirq+0x1b7/0x7d4 [ 24.276222] [ 24.276463] Last potentially related work creation: [ 24.277083] kasan_save_stack+0x22/0x50 [ 24.277593] __kasan_record_aux_stack+0x8e/0xa0 [ 24.278208] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.278860] remove_vma+0x139/0x170 [ 24.279310] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.279868] do_vmi_munmap+0x1f1/0x2b0 [ 24.280355] __vm_munmap+0x138/0x3a0 [ 24.280838] __x64_sys_munmap+0x59/0x80 [ 24.281340] do_syscall_64+0x3f/0x90 [ 24.281812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.282457] [ 24.282670] The buggy address belongs to the object at ffff88800d625000 [ 24.282670] which belongs to the cache vm_area_struct of size 168 [ 24.284126] The buggy address is located 88 bytes inside of [ 24.284126] freed 168-byte region [ffff88800d625000, ffff88800d6250a8) [ 24.285521] [ 24.285738] The buggy address belongs to the physical page: [ 24.286415] page:00000000c632c314 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd625 [ 24.287503] memcg:ffff888013b88d01 [ 24.287931] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.288644] page_type: 0xffffffff() [ 24.289090] raw: 0100000000000200 ffff8880087a0c80 ffffea000037b600 dead000000000003 [ 24.290021] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013b88d01 [ 24.290936] page dumped because: kasan: bad access detected [ 24.291599] [ 24.291820] Memory state around the buggy address: [ 24.292399] ffff88800d624f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 24.293262] ffff88800d624f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.294119] >ffff88800d625000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.294981] ^ [ 24.295705] ffff88800d625080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 24.296579] ffff88800d625100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.297430] ================================================================== [ 24.298351] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.146244] BUG: Bad rss-counter state mm:000000006fee7276 type:MM_FILEPAGES val:33 [ 26.147032] BUG: Bad rss-counter state mm:000000006fee7276 type:MM_ANONPAGES val:22 [ 26.603190] BUG: Bad rss-counter state mm:00000000dadff03b type:MM_FILEPAGES val:33 [ 26.604233] BUG: Bad rss-counter state mm:00000000dadff03b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13764' (ECDSA) to the list of known hosts. 2023/06/21 07:54:49 fuzzer started 2023/06/21 07:54:49 dialing manager at localhost:36067 2023/06/21 07:54:49 checking machine... 2023/06/21 07:54:49 checking revisions... [ 27.347305] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:54:49 testing simple program... [ 27.392949] cgroup: Unknown subsys name 'net' [ 27.436038] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:54:49 Registers: info registers vcpu 0 RAX=0000000045759a2d RBX=00000000421f7b3c RCX=ffff888018057100 RDX=0000000000000011 RSI=0000000000000016 RDI=000000005fddb30a RBP=ffff88800844f780 RSP=ffff888018057068 R8 =000000005752f25b R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092800 R14=ffff8880180570d0 R15=0000000000000011 RIP=ffffffff82270472 RFL=00000a16 [-O--AP-] 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 00007f9693954900 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=00007f9693933020 CR3=0000000015a0c000 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=00000000005b8d7d RBX=ffff8880142a3700 RCX=000000000016e360 RDX=00000000000e710d RSI=0000000000000020 RDI=ffff8880142a3770 RBP=dffffc0000000000 RSP=ffff88806cf09d30 R8 =ffff88806cf395c0 R9 =000000000000ee4a R10=000000000000ee4a R11=0000000000000001 R12=ffff88806cf39730 R13=0000000000000000 R14=ffff8880142a3680 R15=ffff88806cf395c0 RIP=ffffffff8125e5be RFL=00000083 [--S---C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f16b8ef7900 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=00007f16b82e5640 CR3=000000000f61a000 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=64657669656365523d4547415353454d XMM01=352074726f7020322e322e302e303120 XMM02=63736964203a31313a32323936352074 XMM03=66207463656e6e6f6373696420646576 XMM04=74280c970b2cc3f900000000000ae988 XMM05=1319e678c5640f8a00000000001315a8 XMM06=e8008b1642ea3e600000000000131510 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000