[ 26.547085] BUG: Bad rss-counter state mm:000000002c424bc9 type:MM_FILEPAGES val:33 [ 26.548332] BUG: Bad rss-counter state mm:000000002c424bc9 type:MM_ANONPAGES val:22 [ 26.712828] ================================================================== [ 26.713908] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.715093] Read of size 8 at addr ffff888013f1e3f8 by task sshd/219 [ 26.715925] [ 26.716164] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.717127] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.718187] Call Trace: [ 26.718546] [ 26.718850] dump_stack_lvl+0x91/0xf0 [ 26.719378] print_report+0xcc/0x620 [ 26.719897] ? __virt_addr_valid+0x102/0x340 [ 26.720491] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.721157] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.721826] kasan_report+0xbe/0xf0 [ 26.722337] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.723036] vma_interval_tree_remove+0xc75/0xec0 [ 26.723680] vma_prepare+0xc54/0x11a0 [ 26.724194] __split_vma+0x5af/0x950 [ 26.724693] ? __pfx___split_vma+0x10/0x10 [ 26.725254] ? find_held_lock+0x2c/0x110 [ 26.725806] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.726405] ? lock_is_held_type+0x9f/0x120 [ 26.726993] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.727643] ? mtree_range_walk+0x632/0x900 [ 26.728229] ? mas_walk+0x5c7/0x7c0 [ 26.728732] do_vmi_munmap+0x1f1/0x2b0 [ 26.729260] mmap_region+0x1f9/0x2660 [ 26.729773] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.730317] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.731089] ? __pfx_lock_acquire+0x10/0x10 [ 26.731660] ? __pfx_mmap_region+0x10/0x10 [ 26.732229] ? security_mmap_addr+0x7d/0xa0 [ 26.732803] ? get_unmapped_area+0x1f5/0x3f0 [ 26.733393] do_mmap+0x854/0xf00 [ 26.733857] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.734385] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.735002] ksys_mmap_pgoff+0x3af/0x500 [ 26.735549] do_syscall_64+0x3f/0x90 [ 26.736060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.736745] RIP: 0033:0x7f5a63746d82 [ 26.737238] 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 [ 26.739509] RSP: 002b:00007ffe6dbcffd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.740473] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a63746d82 [ 26.741377] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a62b80000 [ 26.742269] RBP: 00007f5a62b80000 R08: 0000000000000009 R09: 0000000000001000 [ 26.743187] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557047a39b20 [ 26.744093] R13: 00007ffe6dbcfff0 R14: 00007ffe6dbd0020 R15: 00007ffe6dbd0380 [ 26.745002] [ 26.745315] [ 26.745549] Allocated by task 212: [ 26.746005] kasan_save_stack+0x22/0x50 [ 26.746556] kasan_set_track+0x25/0x30 [ 26.747086] __kasan_slab_alloc+0x59/0x70 [ 26.747649] kmem_cache_alloc+0x16b/0x370 [ 26.748203] vm_area_dup+0x20/0x160 [ 26.748709] __split_vma+0x170/0x950 [ 26.749215] split_vma+0xc6/0x110 [ 26.749680] mprotect_fixup+0x8d2/0xb30 [ 26.750217] do_mprotect_pkey+0x87e/0xd40 [ 26.750788] __x64_sys_mprotect+0x78/0xc0 [ 26.751354] do_syscall_64+0x3f/0x90 [ 26.751984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.752677] [ 26.752910] Freed by task 212: [ 26.753331] kasan_save_stack+0x22/0x50 [ 26.753872] kasan_set_track+0x25/0x30 [ 26.754402] kasan_save_free_info+0x2b/0x50 [ 26.754991] __kasan_slab_free+0x10a/0x190 [ 26.755615] kmem_cache_free+0x10d/0x4d0 [ 26.756161] rcu_core+0x8c8/0x2860 [ 26.756643] __do_softirq+0x1b7/0x7d4 [ 26.757153] [ 26.757386] Last potentially related work creation: [ 26.758021] kasan_save_stack+0x22/0x50 [ 26.758571] __kasan_record_aux_stack+0x8e/0xa0 [ 26.759194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.759889] remove_vma+0x139/0x170 [ 26.760378] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.760979] do_vmi_munmap+0x1f1/0x2b0 [ 26.761505] __vm_munmap+0x138/0x3a0 [ 26.762012] __x64_sys_munmap+0x59/0x80 [ 26.762552] do_syscall_64+0x3f/0x90 [ 26.763066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.763764] [ 26.763998] The buggy address belongs to the object at ffff888013f1e3a0 [ 26.763998] which belongs to the cache vm_area_struct of size 168 [ 26.765579] The buggy address is located 88 bytes inside of [ 26.765579] freed 168-byte region [ffff888013f1e3a0, ffff888013f1e448) [ 26.767106] [ 26.767340] The buggy address belongs to the physical page: [ 26.768052] page:000000000080948e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13f1e [ 26.769232] memcg:ffff8880093f1001 [ 26.769687] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.770451] page_type: 0xffffffff() [ 26.770942] raw: 0100000000000200 ffff88800879fc80 ffffea0000561100 dead000000000005 [ 26.771926] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880093f1001 [ 26.772915] page dumped because: kasan: bad access detected [ 26.773638] [ 26.773872] Memory state around the buggy address: [ 26.774507] ffff888013f1e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 26.775427] ffff888013f1e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 26.776349] >ffff888013f1e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 26.777272] ^ [ 26.778189] ffff888013f1e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 26.779181] ffff888013f1e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.780132] ================================================================== [ 26.781145] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.245156] BUG: Bad rss-counter state mm:000000009f69ca4c type:MM_FILEPAGES val:33 [ 29.246290] BUG: Bad rss-counter state mm:000000009f69ca4c type:MM_ANONPAGES val:22 [ 29.685198] BUG: Bad rss-counter state mm:000000002bf0fa43 type:MM_FILEPAGES val:33 [ 29.686232] BUG: Bad rss-counter state mm:000000002bf0fa43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8804' (ECDSA) to the list of known hosts. 2023/06/19 22:46:37 fuzzer started 2023/06/19 22:46:37 dialing manager at localhost:44161 2023/06/19 22:46:37 checking machine... 2023/06/19 22:46:37 checking revisions... [ 30.398815] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:46:37 testing simple program... [ 30.451215] cgroup: Unknown subsys name 'net' [ 30.529606] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:46:34 Registers: info registers vcpu 0 RAX=ffff7fffffffffff RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9c132e RSP=ffff88806ce09940 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff888015b89540 RIP=ffffffff8180eef9 RFL=00000216 [----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 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=00007f4665b9acf0 CR3=000000000c954000 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=04ed67adab596dbca94695f47e8c6c07 XMM02=ec2efd57dc4c00df000000000011c798 XMM03=5b9cd750622e807a000000000011c868 XMM04=302c5bbf4e6e6e1c00000000000ae988 XMM05=5b40ff2c65f1bfa00000000000133bc8 XMM06=806171799158d96700000000001328f8 XMM07=e042d86d42eb936e00000000001230c8 XMM08=5b9cd750622e807a000000000011c868 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=1ffffffff0aca531 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016f47510 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007fbf84da7163 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000000000 RIP=ffffffff814c8451 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 00007fbf848b4900 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=00007ffd974be000 CR3=000000000c63c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000