[ 42.896880] BUG: Bad rss-counter state mm:000000007abe8e6b type:MM_FILEPAGES val:33 [ 42.897966] BUG: Bad rss-counter state mm:000000007abe8e6b type:MM_ANONPAGES val:22 [ 43.058758] ================================================================== [ 43.059837] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.060942] Read of size 8 at addr ffff88800dfccc20 by task sshd/219 [ 43.061945] [ 43.062161] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.063020] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.064001] Call Trace: [ 43.064318] [ 43.064603] dump_stack_lvl+0x91/0xf0 [ 43.065089] print_report+0xcc/0x620 [ 43.065589] ? __virt_addr_valid+0x102/0x340 [ 43.066146] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.066759] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.067368] kasan_report+0xbe/0xf0 [ 43.067844] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.068470] vma_interval_tree_remove+0xc75/0xec0 [ 43.069074] vma_prepare+0xc54/0x11a0 [ 43.069547] __split_vma+0x5af/0x950 [ 43.070053] ? __pfx___split_vma+0x10/0x10 [ 43.070594] ? find_held_lock+0x2c/0x110 [ 43.071123] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.071692] ? lock_is_held_type+0x9f/0x120 [ 43.072233] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.072846] ? mtree_range_walk+0x632/0x900 [ 43.073397] ? mas_walk+0x5c7/0x7c0 [ 43.073883] do_vmi_munmap+0x1f1/0x2b0 [ 43.074380] mmap_region+0x1f9/0x2660 [ 43.074859] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.075370] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.076077] ? __pfx_lock_acquire+0x10/0x10 [ 43.076610] ? __pfx_mmap_region+0x10/0x10 [ 43.077141] ? security_mmap_addr+0x7d/0xa0 [ 43.077692] ? get_unmapped_area+0x1f5/0x3f0 [ 43.078242] do_mmap+0x854/0xf00 [ 43.078680] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.079177] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.079735] ksys_mmap_pgoff+0x3af/0x500 [ 43.080243] do_syscall_64+0x3f/0x90 [ 43.080723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.081364] RIP: 0033:0x7f259bce8d82 [ 43.081842] 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 [ 43.083968] RSP: 002b:00007fffae9c2d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.084884] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f259bce8d82 [ 43.085735] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f259b122000 [ 43.086589] RBP: 00007f259b122000 R08: 0000000000000009 R09: 0000000000001000 [ 43.087438] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f52538f70 [ 43.088285] R13: 00007fffae9c2db0 R14: 00007fffae9c2de0 R15: 00007fffae9c3140 [ 43.089139] [ 43.089436] [ 43.089659] Allocated by task 212: [ 43.090087] kasan_save_stack+0x22/0x50 [ 43.090597] kasan_set_track+0x25/0x30 [ 43.091087] __kasan_slab_alloc+0x59/0x70 [ 43.091612] kmem_cache_alloc+0x16b/0x370 [ 43.092123] vm_area_dup+0x20/0x160 [ 43.092579] __split_vma+0x170/0x950 [ 43.093044] split_vma+0xc6/0x110 [ 43.093485] mprotect_fixup+0x8d2/0xb30 [ 43.093999] do_mprotect_pkey+0x87e/0xd40 [ 43.094529] __x64_sys_mprotect+0x78/0xc0 [ 43.095052] do_syscall_64+0x3f/0x90 [ 43.095526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.096169] [ 43.096388] Freed by task 212: [ 43.096779] kasan_save_stack+0x22/0x50 [ 43.097282] kasan_set_track+0x25/0x30 [ 43.097783] kasan_save_free_info+0x2b/0x50 [ 43.098313] __kasan_slab_free+0x10a/0x190 [ 43.098850] kmem_cache_free+0x10d/0x4d0 [ 43.099356] rcu_core+0x8c8/0x2860 [ 43.099801] __do_softirq+0x1b7/0x7d4 [ 43.100277] [ 43.100497] Last potentially related work creation: [ 43.101100] kasan_save_stack+0x22/0x50 [ 43.101620] __kasan_record_aux_stack+0x8e/0xa0 [ 43.102259] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.102904] remove_vma+0x139/0x170 [ 43.103363] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.103926] do_vmi_munmap+0x1f1/0x2b0 [ 43.104414] __vm_munmap+0x138/0x3a0 [ 43.104889] __x64_sys_munmap+0x59/0x80 [ 43.105392] do_syscall_64+0x3f/0x90 [ 43.105892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.106667] [ 43.107015] Second to last potentially related work creation: [ 43.107721] kasan_save_stack+0x22/0x50 [ 43.108227] __kasan_record_aux_stack+0x8e/0xa0 [ 43.108803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.109483] remove_vma+0x139/0x170 [ 43.109954] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.110517] do_vmi_munmap+0x1f1/0x2b0 [ 43.111024] mmap_region+0x1f9/0x2660 [ 43.111540] do_mmap+0x854/0xf00 [ 43.111982] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.112492] ksys_mmap_pgoff+0x3af/0x500 [ 43.113003] do_syscall_64+0x3f/0x90 [ 43.113485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.114170] [ 43.114395] The buggy address belongs to the object at ffff88800dfccbc8 [ 43.114395] which belongs to the cache vm_area_struct of size 168 [ 43.115894] The buggy address is located 88 bytes inside of [ 43.115894] freed 168-byte region [ffff88800dfccbc8, ffff88800dfccc70) [ 43.117314] [ 43.117533] The buggy address belongs to the physical page: [ 43.118221] page:000000006af13011 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfcc [ 43.119326] memcg:ffff88800ee3a701 [ 43.119767] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.120470] page_type: 0xffffffff() [ 43.120927] raw: 0100000000000200 ffff88800879fc80 ffffea000038b880 dead000000000005 [ 43.121856] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee3a701 [ 43.122763] page dumped because: kasan: bad access detected [ 43.123427] [ 43.123649] Memory state around the buggy address: [ 43.124233] ffff88800dfccb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.125090] ffff88800dfccb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 43.125982] >ffff88800dfccc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 43.126838] ^ [ 43.127370] ffff88800dfccc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 43.128240] ffff88800dfccd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 43.129118] ================================================================== [ 43.130269] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 45.345474] BUG: Bad rss-counter state mm:000000006efb40f0 type:MM_FILEPAGES val:33 [ 45.346592] BUG: Bad rss-counter state mm:000000006efb40f0 type:MM_ANONPAGES val:22 [ 45.809496] BUG: Bad rss-counter state mm:0000000068859b56 type:MM_FILEPAGES val:33 [ 45.810787] BUG: Bad rss-counter state mm:0000000068859b56 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46367' (ECDSA) to the list of known hosts. 2023/06/19 23:12:37 fuzzer started 2023/06/19 23:12:37 dialing manager at localhost:44161 2023/06/19 23:12:37 checking machine... 2023/06/19 23:12:37 checking revisions... [ 46.508233] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:12:37 testing simple program... [ 46.558735] cgroup: Unknown subsys name 'net' [ 46.594783] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:12:17 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f0f50fb95f0 CR3=000000001692e000 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=2037333a32313a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a32313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=ffff88806cf09a70 RCX=0000000000000002 RDX=ffff88806cf09f01 RSI=ffff88806cf09f50 RDI=ffff88806cf09a80 RBP=ffff88806cf09f50 RSP=ffff88806cf099c8 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000fdc6 R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09f50 R15=ffff88806cf09a70 RIP=ffffffff8113048d RFL=00000293 [--S-A-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0542805900 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=00007f05427ca008 CR3=000000000fa8e000 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=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