[ 37.377845] BUG: Bad rss-counter state mm:000000004f921236 type:MM_FILEPAGES val:33 [ 37.378897] BUG: Bad rss-counter state mm:000000004f921236 type:MM_ANONPAGES val:22 [ 37.545618] ================================================================== [ 37.546558] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.547504] Read of size 8 at addr ffff888019b30798 by task sshd/219 [ 37.548379] [ 37.548608] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.549485] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.550485] Call Trace: [ 37.550809] [ 37.551097] dump_stack_lvl+0x91/0xf0 [ 37.551591] print_report+0xcc/0x620 [ 37.552079] ? __virt_addr_valid+0x102/0x340 [ 37.552634] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.553254] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.553899] kasan_report+0xbe/0xf0 [ 37.554372] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.554994] vma_interval_tree_remove+0xc75/0xec0 [ 37.555601] vma_prepare+0xc54/0x11a0 [ 37.556085] __split_vma+0x5af/0x950 [ 37.556569] ? __pfx___split_vma+0x10/0x10 [ 37.557103] ? find_held_lock+0x2c/0x110 [ 37.557646] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.558224] ? lock_is_held_type+0x9f/0x120 [ 37.558773] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.559386] ? mtree_range_walk+0x632/0x900 [ 37.559944] ? mas_walk+0x5c7/0x7c0 [ 37.560422] do_vmi_munmap+0x1f1/0x2b0 [ 37.560920] mmap_region+0x1f9/0x2660 [ 37.561440] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.561959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.562681] ? __pfx_lock_acquire+0x10/0x10 [ 37.563226] ? __pfx_mmap_region+0x10/0x10 [ 37.563761] ? security_mmap_addr+0x7d/0xa0 [ 37.564291] ? get_unmapped_area+0x1f5/0x3f0 [ 37.564839] do_mmap+0x854/0xf00 [ 37.565278] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.565803] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.566364] ksys_mmap_pgoff+0x3af/0x500 [ 37.566884] do_syscall_64+0x3f/0x90 [ 37.567365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.568017] RIP: 0033:0x7f3a13adfd82 [ 37.568479] 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 [ 37.570627] RSP: 002b:00007ffd84b45338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.571539] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a13adfd82 [ 37.572391] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a12f19000 [ 37.573233] RBP: 00007f3a12f19000 R08: 0000000000000009 R09: 0000000000001000 [ 37.574103] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644436e7ec0 [ 37.574964] R13: 00007ffd84b45350 R14: 00007ffd84b45380 R15: 00007ffd84b456e0 [ 37.575822] [ 37.576115] [ 37.576333] Allocated by task 212: [ 37.576765] kasan_save_stack+0x22/0x50 [ 37.577291] kasan_set_track+0x25/0x30 [ 37.577791] __kasan_slab_alloc+0x59/0x70 [ 37.578324] kmem_cache_alloc+0x16b/0x370 [ 37.578835] vm_area_dup+0x20/0x160 [ 37.579293] __split_vma+0x170/0x950 [ 37.579764] split_vma+0xc6/0x110 [ 37.580200] mprotect_fixup+0x8d2/0xb30 [ 37.580701] do_mprotect_pkey+0x87e/0xd40 [ 37.581221] __x64_sys_mprotect+0x78/0xc0 [ 37.581753] do_syscall_64+0x3f/0x90 [ 37.582226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.582869] [ 37.583083] Freed by task 212: [ 37.583482] kasan_save_stack+0x22/0x50 [ 37.583995] kasan_set_track+0x25/0x30 [ 37.584492] kasan_save_free_info+0x2b/0x50 [ 37.585024] __kasan_slab_free+0x10a/0x190 [ 37.585577] kmem_cache_free+0x10d/0x4d0 [ 37.586084] rcu_core+0x8c8/0x2860 [ 37.586538] __do_softirq+0x1b7/0x7d4 [ 37.587027] [ 37.587245] Last potentially related work creation: [ 37.587834] kasan_save_stack+0x22/0x50 [ 37.588372] __kasan_record_aux_stack+0x8e/0xa0 [ 37.588977] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.589641] remove_vma+0x139/0x170 [ 37.590094] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.590660] do_vmi_munmap+0x1f1/0x2b0 [ 37.591144] __vm_munmap+0x138/0x3a0 [ 37.591627] __x64_sys_munmap+0x59/0x80 [ 37.592126] do_syscall_64+0x3f/0x90 [ 37.592607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.593248] [ 37.593492] The buggy address belongs to the object at ffff888019b30740 [ 37.593492] which belongs to the cache vm_area_struct of size 168 [ 37.594994] The buggy address is located 88 bytes inside of [ 37.594994] freed 168-byte region [ffff888019b30740, ffff888019b307e8) [ 37.596409] [ 37.596631] The buggy address belongs to the physical page: [ 37.597301] page:00000000912ddecd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b30 [ 37.598454] memcg:ffff88801997e401 [ 37.598902] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.599582] page_type: 0xffffffff() [ 37.600056] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.601039] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801997e401 [ 37.602017] page dumped because: kasan: bad access detected [ 37.602717] [ 37.602946] Memory state around the buggy address: [ 37.603558] ffff888019b30680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.604453] ffff888019b30700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.605331] >ffff888019b30780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.606183] ^ [ 37.606678] ffff888019b30800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.607534] ffff888019b30880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.608387] ================================================================== [ 37.609451] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 39.280558] BUG: Bad rss-counter state mm:0000000026d30d2f type:MM_FILEPAGES val:33 [ 39.281194] BUG: Bad rss-counter state mm:0000000026d30d2f type:MM_ANONPAGES val:22 [ 39.714846] BUG: Bad rss-counter state mm:0000000040e75ef1 type:MM_FILEPAGES val:33 [ 39.715913] BUG: Bad rss-counter state mm:0000000040e75ef1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17947' (ECDSA) to the list of known hosts. 2023/06/19 12:44:26 fuzzer started 2023/06/19 12:44:27 dialing manager at localhost:44161 2023/06/19 12:44:27 checking machine... 2023/06/19 12:44:27 checking revisions... [ 40.406889] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:44:27 testing simple program... [ 40.445578] cgroup: Unknown subsys name 'net' [ 40.505854] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:44:19 Registers: info registers vcpu 0 RAX=ffffffff8363c1b1 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001f6ff24 RSI=ffffffff8363c1b1 RDI=ffff88800fb7f990 RBP=ffff88800fb7f960 RSP=ffff88800fb7f8c0 R8 =0000000000000001 R9 =ffff88800fb7f908 R10=0000000000038001 R11=000000000008a6e6 R12=ffff88800fb7f990 R13=0000000000000000 R14=ffff88800fff3680 R15=0000000000092c40 RIP=ffffffff84532440 RFL=00000286 [--S--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 00007f5767276900 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=00007ffc47c04ff8 CR3=000000000f196000 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=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 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=00007fee6f60b360 CR3=000000001033a000 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=2036323a34343a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a34343a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000