[ 32.210929] BUG: Bad rss-counter state mm:00000000edd5b9c2 type:MM_FILEPAGES val:33 [ 32.212195] BUG: Bad rss-counter state mm:00000000edd5b9c2 type:MM_ANONPAGES val:22 [ 32.251701] ================================================================== [ 32.252935] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.254086] Read of size 8 at addr ffff88800f57f310 by task sshd/218 [ 32.254971] [ 32.255300] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.256306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.257387] Call Trace: [ 32.257707] [ 32.258110] dump_stack_lvl+0x91/0xf0 [ 32.258651] print_report+0xcc/0x620 [ 32.259133] ? __virt_addr_valid+0x102/0x340 [ 32.259705] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.260320] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.260931] kasan_report+0xbe/0xf0 [ 32.261413] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.262034] vma_interval_tree_remove+0xc75/0xec0 [ 32.262634] vma_prepare+0xc54/0x11a0 [ 32.263121] __split_vma+0x5af/0x950 [ 32.263609] ? __pfx___split_vma+0x10/0x10 [ 32.264136] ? find_held_lock+0x2c/0x110 [ 32.264659] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.265224] ? lock_is_held_type+0x9f/0x120 [ 32.265762] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.266368] ? mtree_range_walk+0x632/0x900 [ 32.266917] ? mas_walk+0x5c7/0x7c0 [ 32.267409] do_vmi_munmap+0x1f1/0x2b0 [ 32.267903] mmap_region+0x1f9/0x2660 [ 32.268388] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.268900] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.269620] ? __pfx_lock_acquire+0x10/0x10 [ 32.270159] ? __pfx_mmap_region+0x10/0x10 [ 32.270685] ? security_mmap_addr+0x7d/0xa0 [ 32.271218] ? get_unmapped_area+0x1f5/0x3f0 [ 32.271800] do_mmap+0x854/0xf00 [ 32.272238] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.272730] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.273293] ksys_mmap_pgoff+0x3af/0x500 [ 32.273798] do_syscall_64+0x3f/0x90 [ 32.274275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.274916] RIP: 0033:0x7f90d965fd82 [ 32.275382] 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 [ 32.277515] RSP: 002b:00007fffec28d4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.278422] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90d965fd82 [ 32.279276] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90d8a99000 [ 32.280123] RBP: 00007f90d8a99000 R08: 0000000000000009 R09: 0000000000001000 [ 32.280964] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f47a83b20 [ 32.281810] R13: 00007fffec28d4e0 R14: 00007fffec28d510 R15: 00007fffec28d870 [ 32.282664] [ 32.282954] [ 32.283170] Allocated by task 210: [ 32.283614] kasan_save_stack+0x22/0x50 [ 32.284120] kasan_set_track+0x25/0x30 [ 32.284614] __kasan_slab_alloc+0x59/0x70 [ 32.285139] kmem_cache_alloc+0x16b/0x370 [ 32.285649] vm_area_dup+0x20/0x160 [ 32.286104] __split_vma+0x170/0x950 [ 32.286565] split_vma+0xc6/0x110 [ 32.286999] mprotect_fixup+0x8d2/0xb30 [ 32.287513] do_mprotect_pkey+0x87e/0xd40 [ 32.288026] __x64_sys_mprotect+0x78/0xc0 [ 32.288543] do_syscall_64+0x3f/0x90 [ 32.289014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.289651] [ 32.289865] Freed by task 13: [ 32.290245] kasan_save_stack+0x22/0x50 [ 32.290758] kasan_set_track+0x25/0x30 [ 32.291276] kasan_save_free_info+0x2b/0x50 [ 32.291821] __kasan_slab_free+0x10a/0x190 [ 32.292352] kmem_cache_free+0x10d/0x4d0 [ 32.292857] rcu_core+0x8c8/0x2860 [ 32.293301] __do_softirq+0x1b7/0x7d4 [ 32.293774] [ 32.293988] Last potentially related work creation: [ 32.294574] kasan_save_stack+0x22/0x50 [ 32.295081] __kasan_record_aux_stack+0x8e/0xa0 [ 32.295682] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.296321] remove_vma+0x139/0x170 [ 32.296838] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.297396] do_vmi_munmap+0x1f1/0x2b0 [ 32.297881] __vm_munmap+0x138/0x3a0 [ 32.298349] __x64_sys_munmap+0x59/0x80 [ 32.298843] do_syscall_64+0x3f/0x90 [ 32.299353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.299992] [ 32.300207] The buggy address belongs to the object at ffff88800f57f2b8 [ 32.300207] which belongs to the cache vm_area_struct of size 168 [ 32.301686] The buggy address is located 88 bytes inside of [ 32.301686] freed 168-byte region [ffff88800f57f2b8, ffff88800f57f360) [ 32.303090] [ 32.303316] The buggy address belongs to the physical page: [ 32.303974] page:0000000074c22e2a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf57f [ 32.305054] memcg:ffff88800ee88401 [ 32.305477] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.306127] page_type: 0xffffffff() [ 32.306574] raw: 0100000000000200 ffff88800879fc80 ffffea000039e480 0000000000000008 [ 32.307507] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee88401 [ 32.308423] page dumped because: kasan: bad access detected [ 32.309085] [ 32.309299] Memory state around the buggy address: [ 32.309886] ffff88800f57f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.310753] ffff88800f57f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.311614] >ffff88800f57f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.312460] ^ [ 32.312933] ffff88800f57f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.313796] ffff88800f57f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.314649] ================================================================== [ 32.315601] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.600577] BUG: Bad rss-counter state mm:000000007774afa2 type:MM_FILEPAGES val:33 [ 34.601731] BUG: Bad rss-counter state mm:000000007774afa2 type:MM_ANONPAGES val:22 [ 34.963079] BUG: Bad rss-counter state mm:000000009b52720a type:MM_FILEPAGES val:33 [ 34.964084] BUG: Bad rss-counter state mm:000000009b52720a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28685' (ECDSA) to the list of known hosts. 2023/06/20 02:14:52 fuzzer started 2023/06/20 02:14:52 dialing manager at localhost:44161 2023/06/20 02:14:52 checking machine... 2023/06/20 02:14:52 checking revisions... [ 35.726425] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:14:52 testing simple program... [ 35.778508] cgroup: Unknown subsys name 'net' [ 35.816952] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:14:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff813ad6cf RDX=0000000000003ad6 RSI=0000000000003ad6 RDI=ffffffff864f6718 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =0000000000000000 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09ab9 R15=ffff88806ce09a78 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007f2b2d2c9900 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=00007ffd55179000 CR3=000000000db66000 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=00007f943f39e240 CR3=000000000d9f6000 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=34313a3230203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343339 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000