syzkaller login: [ 38.502363] BUG: Bad rss-counter state mm:0000000037aef520 type:MM_FILEPAGES val:33 [ 38.504389] BUG: Bad rss-counter state mm:0000000037aef520 type:MM_ANONPAGES val:22 [ 38.750608] ================================================================== [ 38.751322] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.752116] Read of size 8 at addr ffff88800e0be6b0 by task sshd/230 [ 38.752571] [ 38.752749] CPU: 0 PID: 230 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.753294] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.753959] Call Trace: [ 38.754166] [ 38.754346] dump_stack_lvl+0x91/0xf0 [ 38.754811] print_report+0xcc/0x620 [ 38.755128] ? __virt_addr_valid+0x102/0x340 [ 38.755513] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.755968] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.756361] kasan_report+0xbe/0xf0 [ 38.756764] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.757168] vma_interval_tree_remove+0xc75/0xec0 [ 38.757592] vma_prepare+0xc54/0x11a0 [ 38.757949] __split_vma+0x5af/0x950 [ 38.758254] ? __pfx___split_vma+0x10/0x10 [ 38.758639] ? find_held_lock+0x2c/0x110 [ 38.759031] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.759421] ? lock_is_held_type+0x9f/0x120 [ 38.759874] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.760263] ? mtree_range_walk+0x632/0x900 [ 38.760621] ? mas_walk+0x5c7/0x7c0 [ 38.760979] do_vmi_munmap+0x1f1/0x2b0 [ 38.761296] mmap_region+0x1f9/0x2660 [ 38.761634] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.762011] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.762488] ? __pfx_lock_acquire+0x10/0x10 [ 38.762905] ? __pfx_mmap_region+0x10/0x10 [ 38.763244] ? security_mmap_addr+0x7d/0xa0 [ 38.763616] ? get_unmapped_area+0x1f5/0x3f0 [ 38.764025] do_mmap+0x854/0xf00 [ 38.764307] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.764671] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.765121] ksys_mmap_pgoff+0x3af/0x500 [ 38.765475] do_syscall_64+0x3f/0x90 [ 38.765828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.766243] RIP: 0033:0x7f3fea9ccd82 [ 38.766582] 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 [ 38.768039] RSP: 002b:00007ffee3c25cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.768646] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3fea9ccd82 [ 38.769222] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3fe9e06000 [ 38.769857] RBP: 00007f3fe9e06000 R08: 0000000000000009 R09: 0000000000001000 [ 38.770448] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565158a51d90 [ 38.771078] R13: 00007ffee3c25ce0 R14: 00007ffee3c25d10 R15: 00007ffee3c26070 [ 38.771623] [ 38.771874] [ 38.772041] Allocated by task 221: [ 38.772373] kasan_save_stack+0x22/0x50 [ 38.772804] kasan_set_track+0x25/0x30 [ 38.773160] __kasan_slab_alloc+0x59/0x70 [ 38.773544] kmem_cache_alloc+0x16b/0x370 [ 38.773984] vm_area_dup+0x20/0x160 [ 38.774317] __split_vma+0x170/0x950 [ 38.774658] split_vma+0xc6/0x110 [ 38.775059] mprotect_fixup+0x8d2/0xb30 [ 38.775439] do_mprotect_pkey+0x87e/0xd40 [ 38.775871] __x64_sys_mprotect+0x78/0xc0 [ 38.776189] do_syscall_64+0x3f/0x90 [ 38.776542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.777080] [ 38.777238] Freed by task 213: [ 38.777547] kasan_save_stack+0x22/0x50 [ 38.777982] kasan_set_track+0x25/0x30 [ 38.778343] kasan_save_free_info+0x2b/0x50 [ 38.778767] __kasan_slab_free+0x10a/0x190 [ 38.779155] kmem_cache_free+0x10d/0x4d0 [ 38.779562] rcu_core+0x8c8/0x2860 [ 38.779979] __do_softirq+0x1b7/0x7d4 [ 38.780282] [ 38.780445] Last potentially related work creation: [ 38.780869] kasan_save_stack+0x22/0x50 [ 38.781186] __kasan_record_aux_stack+0x8e/0xa0 [ 38.781584] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.782059] remove_vma+0x139/0x170 [ 38.782355] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.782790] do_vmi_munmap+0x1f1/0x2b0 [ 38.783114] __vm_munmap+0x138/0x3a0 [ 38.783415] __x64_sys_munmap+0x59/0x80 [ 38.783844] do_syscall_64+0x3f/0x90 [ 38.784155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.784568] [ 38.784783] Second to last potentially related work creation: [ 38.785223] kasan_save_stack+0x22/0x50 [ 38.785545] __kasan_record_aux_stack+0x8e/0xa0 [ 38.785974] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.786389] remove_vma+0x139/0x170 [ 38.786746] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.787150] do_vmi_munmap+0x1f1/0x2b0 [ 38.787526] mmap_region+0x1f9/0x2660 [ 38.787942] do_mmap+0x854/0xf00 [ 38.788220] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.788561] ksys_mmap_pgoff+0x3af/0x500 [ 38.788937] do_syscall_64+0x3f/0x90 [ 38.789240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.789650] [ 38.789881] The buggy address belongs to the object at ffff88800e0be658 [ 38.789881] which belongs to the cache vm_area_struct of size 168 [ 38.790887] The buggy address is located 88 bytes inside of [ 38.790887] freed 168-byte region [ffff88800e0be658, ffff88800e0be700) [ 38.791976] [ 38.792126] The buggy address belongs to the physical page: [ 38.792642] page:000000003e2d4914 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0be [ 38.793510] memcg:ffff88800e214c01 [ 38.793893] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.794376] page_type: 0xffffffff() [ 38.794819] raw: 0100000000000200 ffff8880087a0c80 ffffea0000355f00 dead000000000002 [ 38.795482] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e214c01 [ 38.796211] page dumped because: kasan: bad access detected [ 38.796640] [ 38.796827] Memory state around the buggy address: [ 38.797204] ffff88800e0be580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.797813] ffff88800e0be600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.798356] >ffff88800e0be680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.799035] ^ [ 38.799408] ffff88800e0be700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 38.800082] ffff88800e0be780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.800653] ================================================================== [ 38.812139] Disabling lock debugging due to kernel taint [ 42.025755] BUG: Bad rss-counter state mm:00000000e97690cd type:MM_FILEPAGES val:33 [ 42.027625] BUG: Bad rss-counter state mm:00000000e97690cd type:MM_ANONPAGES val:22 [ 42.462746] BUG: Bad rss-counter state mm:000000006143f451 type:MM_FILEPAGES val:33 [ 42.463453] BUG: Bad rss-counter state mm:000000006143f451 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63677' (ECDSA) to the list of known hosts. 2023/06/21 10:26:09 fuzzer started 2023/06/21 10:26:10 dialing manager at localhost:36067 2023/06/21 10:26:10 checking machine... 2023/06/21 10:26:10 checking revisions... 2023/06/21 10:26:10 testing simple program... [ 43.190639] kmemleak: Automatic memory scanning thread ended [ 43.231549] cgroup: Unknown subsys name 'net' [ 43.273519] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:26:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800e5bde80 RCX=0000000000000000 RDX=1ffff11001cb7be2 RSI=ffffffff8116afcc RDI=ffff8880158559e0 RBP=ffff88800fe7fd00 RSP=ffff88800fe7fb60 R8 =0000000000000001 R9 =ffffed1001fcff5e R10=0000000000000003 R11=0000000000000000 R12=0000000000000000 R13=00000000ffffffff R14=0000000001200000 R15=ffff88800fe7fe48 RIP=ffffffff8116b02e 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 00007f88d69dc900 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=000055c93cbb22d4 CR3=0000000009806000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff864bce01 RDX=1ffff1100d9e135e RSI=ffffffff84536004 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff864bce30 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800fead1c0 R15=ffff8880189b51b0 RIP=ffffffff813ad47e RFL=00000282 [--S----] 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 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=00007f2001ad3328 CR3=0000000005482000 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