syzkaller login: [ 38.885809] BUG: Bad rss-counter state mm:00000000efde6c73 type:MM_FILEPAGES val:33 [ 38.886831] BUG: Bad rss-counter state mm:00000000efde6c73 type:MM_ANONPAGES val:22 [ 39.054430] ================================================================== [ 39.055364] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.056343] Read of size 8 at addr ffff888016749d08 by task sshd/227 [ 39.057139] [ 39.057363] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.058411] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.059402] Call Trace: [ 39.059730] [ 39.060027] dump_stack_lvl+0x91/0xf0 [ 39.060532] print_report+0xcc/0x620 [ 39.061009] ? __virt_addr_valid+0x102/0x340 [ 39.061558] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.062171] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.062790] kasan_report+0xbe/0xf0 [ 39.063261] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.063892] vma_interval_tree_remove+0xc75/0xec0 [ 39.064486] vma_prepare+0xc54/0x11a0 [ 39.064960] __split_vma+0x5af/0x950 [ 39.065424] ? __pfx___split_vma+0x10/0x10 [ 39.065949] ? find_held_lock+0x2c/0x110 [ 39.066464] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.067022] ? lock_is_held_type+0x9f/0x120 [ 39.067552] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.068178] ? mtree_range_walk+0x632/0x900 [ 39.068729] ? mas_walk+0x5c7/0x7c0 [ 39.069196] do_vmi_munmap+0x1f1/0x2b0 [ 39.069681] mmap_region+0x1f9/0x2660 [ 39.070159] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.070663] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.071384] ? __pfx_lock_acquire+0x10/0x10 [ 39.071930] ? __pfx_mmap_region+0x10/0x10 [ 39.072453] ? security_mmap_addr+0x7d/0xa0 [ 39.072976] ? get_unmapped_area+0x1f5/0x3f0 [ 39.073524] do_mmap+0x854/0xf00 [ 39.073957] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.074449] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.075004] ksys_mmap_pgoff+0x3af/0x500 [ 39.075514] do_syscall_64+0x3f/0x90 [ 39.075997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.076634] RIP: 0033:0x7fc5f3bf9d82 [ 39.077084] 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 [ 39.079218] RSP: 002b:00007ffcd858f8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.080128] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5f3bf9d82 [ 39.080966] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5f3033000 [ 39.081815] RBP: 00007fc5f3033000 R08: 0000000000000009 R09: 0000000000001000 [ 39.082658] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563172c74d90 [ 39.083501] R13: 00007ffcd858f900 R14: 00007ffcd858f930 R15: 00007ffcd858fc90 [ 39.084358] [ 39.084652] [ 39.084870] Allocated by task 220: [ 39.085297] kasan_save_stack+0x22/0x50 [ 39.085802] kasan_set_track+0x25/0x30 [ 39.086293] __kasan_slab_alloc+0x59/0x70 [ 39.086817] kmem_cache_alloc+0x16b/0x370 [ 39.087333] vm_area_dup+0x20/0x160 [ 39.087812] __split_vma+0x170/0x950 [ 39.088282] split_vma+0xc6/0x110 [ 39.088720] mprotect_fixup+0x8d2/0xb30 [ 39.089219] do_mprotect_pkey+0x87e/0xd40 [ 39.089735] __x64_sys_mprotect+0x78/0xc0 [ 39.090257] do_syscall_64+0x3f/0x90 [ 39.090737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.091366] [ 39.091582] Freed by task 220: [ 39.091983] kasan_save_stack+0x22/0x50 [ 39.092483] kasan_set_track+0x25/0x30 [ 39.092975] kasan_save_free_info+0x2b/0x50 [ 39.093496] __kasan_slab_free+0x10a/0x190 [ 39.094029] kmem_cache_free+0x10d/0x4d0 [ 39.094527] rcu_core+0x8c8/0x2860 [ 39.094964] __do_softirq+0x1b7/0x7d4 [ 39.095430] [ 39.095642] Last potentially related work creation: [ 39.096241] kasan_save_stack+0x22/0x50 [ 39.096748] __kasan_record_aux_stack+0x8e/0xa0 [ 39.097314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.097957] remove_vma+0x139/0x170 [ 39.098413] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.098972] do_vmi_munmap+0x1f1/0x2b0 [ 39.099451] __vm_munmap+0x138/0x3a0 [ 39.099932] __x64_sys_munmap+0x59/0x80 [ 39.100427] do_syscall_64+0x3f/0x90 [ 39.100900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.101534] [ 39.101750] The buggy address belongs to the object at ffff888016749cb0 [ 39.101750] which belongs to the cache vm_area_struct of size 168 [ 39.103196] The buggy address is located 88 bytes inside of [ 39.103196] freed 168-byte region [ffff888016749cb0, ffff888016749d58) [ 39.104590] [ 39.104806] The buggy address belongs to the physical page: [ 39.105453] page:00000000ad1a9b4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16749 [ 39.106529] memcg:ffff88800fc11401 [ 39.106954] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.107591] page_type: 0xffffffff() [ 39.108056] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.108963] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc11401 [ 39.109866] page dumped because: kasan: bad access detected [ 39.110518] [ 39.110733] Memory state around the buggy address: [ 39.111305] ffff888016749c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.112162] ffff888016749c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.113010] >ffff888016749d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.113853] ^ [ 39.114285] ffff888016749d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.115138] ffff888016749e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.116021] ================================================================== [ 39.117143] Disabling lock debugging due to kernel taint [ 41.744186] BUG: Bad rss-counter state mm:000000007a94a094 type:MM_FILEPAGES val:33 [ 41.745165] BUG: Bad rss-counter state mm:000000007a94a094 type:MM_ANONPAGES val:22 [ 42.166491] BUG: Bad rss-counter state mm:00000000f4a33845 type:MM_FILEPAGES val:33 [ 42.167944] BUG: Bad rss-counter state mm:00000000f4a33845 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30660' (ECDSA) to the list of known hosts. 2023/06/19 15:28:39 fuzzer started 2023/06/19 15:28:39 dialing manager at localhost:44161 2023/06/19 15:28:39 checking machine... 2023/06/19 15:28:39 checking revisions... [ 42.868135] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:28:39 testing simple program... [ 42.909592] cgroup: Unknown subsys name 'net' [ 42.958392] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:28:39 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=00007ffeff459bb8 CR3=0000000019cce000 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=38323a3531203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3733325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383531 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=1ffff11001b222f7 RBX=ffff88800d911788 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d9117b8 RBP=ffff88800dbceda0 RSP=ffff88800eed7d28 R8 =0000000000000001 R9 =ffffed1001ddaf99 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800dbce920 R14=ffffffff81ef13be R15=ffff88800c6e0900 RIP=ffffffff81846362 RFL=00000046 [---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 00007fe549588900 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=00007ffe6bdee000 CR3=000000000da9a000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000