[ 26.598405] BUG: Bad rss-counter state mm:00000000a21aeb68 type:MM_FILEPAGES val:33 [ 26.599442] BUG: Bad rss-counter state mm:00000000a21aeb68 type:MM_ANONPAGES val:22 [ 26.752417] ================================================================== [ 26.753496] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.754622] Read of size 8 at addr ffff88801473e058 by task sshd/218 [ 26.755695] [ 26.755962] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.756985] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.758153] Call Trace: [ 26.758500] <TASK> [ 26.758812] dump_stack_lvl+0x91/0xf0 [ 26.759343] print_report+0xcc/0x620 [ 26.759869] ? __virt_addr_valid+0x102/0x340 [ 26.760454] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.761128] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.761796] kasan_report+0xbe/0xf0 [ 26.762317] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.763006] vma_interval_tree_remove+0xc75/0xec0 [ 26.763654] vma_prepare+0xc54/0x11a0 [ 26.764164] __split_vma+0x5af/0x950 [ 26.764680] ? __pfx___split_vma+0x10/0x10 [ 26.765246] ? find_held_lock+0x2c/0x110 [ 26.765811] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.766422] ? lock_is_held_type+0x9f/0x120 [ 26.767023] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.767684] ? mtree_range_walk+0x632/0x900 [ 26.768269] ? mas_walk+0x5c7/0x7c0 [ 26.768777] do_vmi_munmap+0x1f1/0x2b0 [ 26.769305] mmap_region+0x1f9/0x2660 [ 26.769826] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.770381] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.771174] ? __pfx_lock_acquire+0x10/0x10 [ 26.771764] ? __pfx_mmap_region+0x10/0x10 [ 26.772347] ? security_mmap_addr+0x7d/0xa0 [ 26.772933] ? get_unmapped_area+0x1f5/0x3f0 [ 26.773544] do_mmap+0x854/0xf00 [ 26.774033] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.774573] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.775201] ksys_mmap_pgoff+0x3af/0x500 [ 26.775765] do_syscall_64+0x3f/0x90 [ 26.776290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.777000] RIP: 0033:0x7fdbdb596d82 [ 26.777508] 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 [ 26.779879] RSP: 002b:00007ffd998df0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.780884] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbdb596d82 [ 26.781830] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbda9d0000 [ 26.782779] RBP: 00007fdbda9d0000 R08: 0000000000000009 R09: 0000000000001000 [ 26.783727] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b3fd9aec0 [ 26.784666] R13: 00007ffd998df100 R14: 00007ffd998df130 R15: 00007ffd998df490 [ 26.785618] </TASK> [ 26.785945] [ 26.786180] Allocated by task 211: [ 26.786652] kasan_save_stack+0x22/0x50 [ 26.787231] kasan_set_track+0x25/0x30 [ 26.787780] __kasan_slab_alloc+0x59/0x70 [ 26.788357] kmem_cache_alloc+0x16b/0x370 [ 26.788924] vm_area_dup+0x20/0x160 [ 26.789428] __split_vma+0x170/0x950 [ 26.789950] split_vma+0xc6/0x110 [ 26.790437] mprotect_fixup+0x8d2/0xb30 [ 26.791003] do_mprotect_pkey+0x87e/0xd40 [ 26.791583] __x64_sys_mprotect+0x78/0xc0 [ 26.792162] do_syscall_64+0x3f/0x90 [ 26.792684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.793395] [ 26.793631] Freed by task 211: [ 26.794066] kasan_save_stack+0x22/0x50 [ 26.794624] kasan_set_track+0x25/0x30 [ 26.795174] kasan_save_free_info+0x2b/0x50 [ 26.795767] __kasan_slab_free+0x10a/0x190 [ 26.796359] kmem_cache_free+0x10d/0x4d0 [ 26.796922] rcu_core+0x8c8/0x2860 [ 26.797412] __do_softirq+0x1b7/0x7d4 [ 26.797945] [ 26.798183] Last potentially related work creation: [ 26.798844] kasan_save_stack+0x22/0x50 [ 26.799408] __kasan_record_aux_stack+0x8e/0xa0 [ 26.800045] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.800755] remove_vma+0x139/0x170 [ 26.801257] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.801881] do_vmi_munmap+0x1f1/0x2b0 [ 26.802421] __vm_munmap+0x138/0x3a0 [ 26.802945] __x64_sys_munmap+0x59/0x80 [ 26.803495] do_syscall_64+0x3f/0x90 [ 26.804018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.804734] [ 26.804971] The buggy address belongs to the object at ffff88801473e000 [ 26.804971] which belongs to the cache vm_area_struct of size 168 [ 26.806601] The buggy address is located 88 bytes inside of [ 26.806601] freed 168-byte region [ffff88801473e000, ffff88801473e0a8) [ 26.808159] [ 26.808397] The buggy address belongs to the physical page: [ 26.809128] page:00000000ceb8f6c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1473e [ 26.810337] memcg:ffff88801473a201 [ 26.810825] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.811536] page_type: 0xffffffff() [ 26.812039] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.813065] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801473a201 [ 26.814071] page dumped because: kasan: bad access detected [ 26.814808] [ 26.815044] Memory state around the buggy address: [ 26.815699] ffff88801473df00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 26.816660] ffff88801473df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.817618] >ffff88801473e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.818568] ^ [ 26.819389] ffff88801473e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 26.820346] ffff88801473e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.821290] ================================================================== [ 26.822524] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.622570] BUG: Bad rss-counter state mm:00000000adf1a849 type:MM_FILEPAGES val:33 [ 28.623512] BUG: Bad rss-counter state mm:00000000adf1a849 type:MM_ANONPAGES val:22 [ 29.101687] BUG: Bad rss-counter state mm:0000000047a42f6a type:MM_FILEPAGES val:33 [ 29.102987] BUG: Bad rss-counter state mm:0000000047a42f6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24919' (ECDSA) to the list of known hosts. 2023/06/20 05:03:17 fuzzer started 2023/06/20 05:03:17 dialing manager at localhost:44161 2023/06/20 05:03:17 checking machine... 2023/06/20 05:03:17 checking revisions... [ 29.825160] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:03:18 testing simple program... [ 29.877464] cgroup: Unknown subsys name 'net' [ 29.947476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:03:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f946ae79000 RCX=0000000000000000 RDX=ffff888016589b40 RSI=00007f946ae79000 RDI=ffffffffff600000 RBP=0000000000000001 RSP=ffff88800ed07828 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6996 R12=ffff88800ed07970 R13=0000000000000000 R14=ffff888016589b40 R15=ffff88800ed07e9e RIP=ffffffff814c03b0 RFL=00000206 [-----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 00007f946a987900 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=00007f946af3c650 CR3=000000000c522000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffbabe048 RBX=ffffffff85e0942c RCX=ffffffff818c7462 RDX=0000000000000000 RSI=ffffffff8614a426 RDI=ffffffff85e09410 RBP=ffffffff85e09410 RSP=ffff88806cf09998 R8 =ffffffff8614a426 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000002400f R12=ffffffff85e0944c R13=ffffffff85e09410 R14=ffffffff85e09410 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 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=00007f4b2ac24890 CR3=000000000e650000 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=2037313a33303a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a33303a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000