syzkaller login: [ 31.569338] BUG: Bad rss-counter state mm:000000001026fa93 type:MM_FILEPAGES val:33 [ 31.570658] BUG: Bad rss-counter state mm:000000001026fa93 type:MM_ANONPAGES val:22 [ 31.732207] ================================================================== [ 31.733321] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.734506] Read of size 8 at addr ffff888015de6968 by task sshd/222 [ 31.735381] [ 31.735598] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.736449] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.737426] Call Trace: [ 31.737748] [ 31.738031] dump_stack_lvl+0x91/0xf0 [ 31.738533] print_report+0xcc/0x620 [ 31.739025] ? __virt_addr_valid+0x102/0x340 [ 31.739572] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.740189] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.740803] kasan_report+0xbe/0xf0 [ 31.741273] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.741890] vma_interval_tree_remove+0xc75/0xec0 [ 31.742495] vma_prepare+0xc54/0x11a0 [ 31.742976] __split_vma+0x5af/0x950 [ 31.743444] ? __pfx___split_vma+0x10/0x10 [ 31.743967] ? find_held_lock+0x2c/0x110 [ 31.744492] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.745053] ? lock_is_held_type+0x9f/0x120 [ 31.745587] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.746197] ? mtree_range_walk+0x632/0x900 [ 31.746770] ? mas_walk+0x5c7/0x7c0 [ 31.747242] do_vmi_munmap+0x1f1/0x2b0 [ 31.747735] mmap_region+0x1f9/0x2660 [ 31.748218] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.748739] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.749451] ? __pfx_lock_acquire+0x10/0x10 [ 31.749981] ? __pfx_mmap_region+0x10/0x10 [ 31.750511] ? security_mmap_addr+0x7d/0xa0 [ 31.751043] ? get_unmapped_area+0x1f5/0x3f0 [ 31.751591] do_mmap+0x854/0xf00 [ 31.752026] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.752521] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.753089] ksys_mmap_pgoff+0x3af/0x500 [ 31.753601] do_syscall_64+0x3f/0x90 [ 31.754078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.754730] RIP: 0033:0x7f52682d5d82 [ 31.755184] 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 [ 31.757309] RSP: 002b:00007ffd8c355ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.758212] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f52682d5d82 [ 31.759066] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f526770f000 [ 31.759906] RBP: 00007f526770f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.760757] R10: 0000000000000812 R11: 0000000000000206 R12: 000056004fd6bec0 [ 31.761603] R13: 00007ffd8c355ae0 R14: 00007ffd8c355b10 R15: 00007ffd8c355e70 [ 31.762475] [ 31.762765] [ 31.762979] Allocated by task 215: [ 31.763407] kasan_save_stack+0x22/0x50 [ 31.763914] kasan_set_track+0x25/0x30 [ 31.764404] __kasan_slab_alloc+0x59/0x70 [ 31.764926] kmem_cache_alloc+0x16b/0x370 [ 31.765437] vm_area_dup+0x20/0x160 [ 31.765888] __split_vma+0x170/0x950 [ 31.766366] split_vma+0xc6/0x110 [ 31.766801] mprotect_fixup+0x8d2/0xb30 [ 31.767328] do_mprotect_pkey+0x87e/0xd40 [ 31.767852] __x64_sys_mprotect+0x78/0xc0 [ 31.768374] do_syscall_64+0x3f/0x90 [ 31.768852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.769497] [ 31.769714] Freed by task 215: [ 31.770105] kasan_save_stack+0x22/0x50 [ 31.770628] kasan_set_track+0x25/0x30 [ 31.771127] kasan_save_free_info+0x2b/0x50 [ 31.771659] __kasan_slab_free+0x10a/0x190 [ 31.772199] kmem_cache_free+0x10d/0x4d0 [ 31.772714] rcu_core+0x8c8/0x2860 [ 31.773166] __do_softirq+0x1b7/0x7d4 [ 31.773642] [ 31.773857] Last potentially related work creation: [ 31.774451] kasan_save_stack+0x22/0x50 [ 31.774959] __kasan_record_aux_stack+0x8e/0xa0 [ 31.775536] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.776180] remove_vma+0x139/0x170 [ 31.776634] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.777195] do_vmi_munmap+0x1f1/0x2b0 [ 31.777679] __vm_munmap+0x138/0x3a0 [ 31.778147] __x64_sys_munmap+0x59/0x80 [ 31.778648] do_syscall_64+0x3f/0x90 [ 31.779120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.779771] [ 31.779987] The buggy address belongs to the object at ffff888015de6910 [ 31.779987] which belongs to the cache vm_area_struct of size 168 [ 31.781459] The buggy address is located 88 bytes inside of [ 31.781459] freed 168-byte region [ffff888015de6910, ffff888015de69b8) [ 31.782884] [ 31.783099] The buggy address belongs to the physical page: [ 31.783762] page:00000000c27aa56b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15de6 [ 31.784881] memcg:ffff88800eac6401 [ 31.785308] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.786016] page_type: 0xffffffff() [ 31.786487] raw: 0100000000000200 ffff88800879fc80 ffffea0000366740 dead000000000003 [ 31.787409] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eac6401 [ 31.788320] page dumped because: kasan: bad access detected [ 31.788982] [ 31.789202] Memory state around the buggy address: [ 31.789792] ffff888015de6800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.790658] ffff888015de6880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.791514] >ffff888015de6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.792368] ^ [ 31.793157] ffff888015de6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.794018] ffff888015de6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.794880] ================================================================== [ 31.795846] Disabling lock debugging due to kernel taint [ 33.645540] BUG: Bad rss-counter state mm:00000000d25e7859 type:MM_FILEPAGES val:33 [ 33.646136] BUG: Bad rss-counter state mm:00000000d25e7859 type:MM_ANONPAGES val:22 [ 34.052086] BUG: Bad rss-counter state mm:00000000bc60db77 type:MM_FILEPAGES val:33 [ 34.053038] BUG: Bad rss-counter state mm:00000000bc60db77 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41676' (ECDSA) to the list of known hosts. 2023/06/20 06:13:06 fuzzer started 2023/06/20 06:13:06 dialing manager at localhost:44161 2023/06/20 06:13:06 checking machine... 2023/06/20 06:13:06 checking revisions... [ 34.798829] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:13:06 testing simple program... [ 34.849738] cgroup: Unknown subsys name 'net' [ 34.907765] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:13:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88800fe17a30 RSI=ffff88800fe17d10 RDI=ffff88800fe17a30 RBP=ffff88800fe17ac8 RSP=ffff88800fe17a20 R8 =0000000000000001 R9 =ffff88800fe17a70 R10=0000000000038001 R11=0000000000020c55 R12=ffff88800fe17af8 R13=0000000000000000 R14=ffff888014738000 R15=ffff88800e8be720 RIP=ffffffff81130352 RFL=00000202 [-------] 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 00007f09e3d3f900 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=00007f09e42f70b0 CR3=000000000e4f0000 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=33313a3630203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303038 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007fdb00724c90 CR3=000000000de3e000 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=2035303a33313a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a33313a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000