syzkaller login: [ 38.871654] BUG: Bad rss-counter state mm:00000000c8faffd6 type:MM_FILEPAGES val:33 [ 38.873063] BUG: Bad rss-counter state mm:00000000c8faffd6 type:MM_ANONPAGES val:22 [ 39.016927] ================================================================== [ 39.017823] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.018760] Read of size 8 at addr ffff88800d9dbd08 by task sshd/221 [ 39.019537] [ 39.019758] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.020694] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.021651] Call Trace: [ 39.021971] [ 39.022280] dump_stack_lvl+0x91/0xf0 [ 39.022772] print_report+0xcc/0x620 [ 39.023250] ? __virt_addr_valid+0x102/0x340 [ 39.023800] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.024419] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.025030] kasan_report+0xbe/0xf0 [ 39.025502] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.026111] vma_interval_tree_remove+0xc75/0xec0 [ 39.026715] vma_prepare+0xc54/0x11a0 [ 39.027194] __split_vma+0x5af/0x950 [ 39.027663] ? __pfx___split_vma+0x10/0x10 [ 39.028197] ? find_held_lock+0x2c/0x110 [ 39.028713] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.029270] ? lock_is_held_type+0x9f/0x120 [ 39.029802] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.030421] ? mtree_range_walk+0x632/0x900 [ 39.030963] ? mas_walk+0x5c7/0x7c0 [ 39.031429] do_vmi_munmap+0x1f1/0x2b0 [ 39.031911] mmap_region+0x1f9/0x2660 [ 39.032383] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.032887] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.033589] ? __pfx_lock_acquire+0x10/0x10 [ 39.034115] ? __pfx_mmap_region+0x10/0x10 [ 39.034654] ? security_mmap_addr+0x7d/0xa0 [ 39.035173] ? get_unmapped_area+0x1f5/0x3f0 [ 39.035712] do_mmap+0x854/0xf00 [ 39.036150] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.036639] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.037195] ksys_mmap_pgoff+0x3af/0x500 [ 39.037691] do_syscall_64+0x3f/0x90 [ 39.038163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.038834] RIP: 0033:0x7f440b374d82 [ 39.039290] 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 [ 39.041369] RSP: 002b:00007ffe2c8a7658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.042289] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f440b374d82 [ 39.043123] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f440a7ae000 [ 39.043960] RBP: 00007f440a7ae000 R08: 0000000000000009 R09: 0000000000001000 [ 39.044813] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6662aed90 [ 39.045655] R13: 00007ffe2c8a7670 R14: 00007ffe2c8a76a0 R15: 00007ffe2c8a7a00 [ 39.046509] [ 39.046800] [ 39.047014] Allocated by task 213: [ 39.047436] kasan_save_stack+0x22/0x50 [ 39.047929] kasan_set_track+0x25/0x30 [ 39.048420] __kasan_slab_alloc+0x59/0x70 [ 39.048940] kmem_cache_alloc+0x16b/0x370 [ 39.049450] vm_area_dup+0x20/0x160 [ 39.049907] __split_vma+0x170/0x950 [ 39.050385] split_vma+0xc6/0x110 [ 39.050821] mprotect_fixup+0x8d2/0xb30 [ 39.051323] do_mprotect_pkey+0x87e/0xd40 [ 39.051840] __x64_sys_mprotect+0x78/0xc0 [ 39.052352] do_syscall_64+0x3f/0x90 [ 39.052827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.053461] [ 39.053674] Freed by task 213: [ 39.054061] kasan_save_stack+0x22/0x50 [ 39.054564] kasan_set_track+0x25/0x30 [ 39.055054] kasan_save_free_info+0x2b/0x50 [ 39.055591] __kasan_slab_free+0x10a/0x190 [ 39.056121] kmem_cache_free+0x10d/0x4d0 [ 39.056623] rcu_core+0x8c8/0x2860 [ 39.057067] __do_softirq+0x1b7/0x7d4 [ 39.057542] [ 39.057755] Last potentially related work creation: [ 39.058357] kasan_save_stack+0x22/0x50 [ 39.058856] __kasan_record_aux_stack+0x8e/0xa0 [ 39.059422] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.060064] remove_vma+0x139/0x170 [ 39.060512] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.061069] do_vmi_munmap+0x1f1/0x2b0 [ 39.061547] __vm_munmap+0x138/0x3a0 [ 39.062006] __x64_sys_munmap+0x59/0x80 [ 39.062516] do_syscall_64+0x3f/0x90 [ 39.062990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.063633] [ 39.063846] The buggy address belongs to the object at ffff88800d9dbcb0 [ 39.063846] which belongs to the cache vm_area_struct of size 168 [ 39.065296] The buggy address is located 88 bytes inside of [ 39.065296] freed 168-byte region [ffff88800d9dbcb0, ffff88800d9dbd58) [ 39.066689] [ 39.066902] The buggy address belongs to the physical page: [ 39.067559] page:00000000b63b5579 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9db [ 39.068637] memcg:ffff88800f598c01 [ 39.069061] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.069701] page_type: 0xffffffff() [ 39.070147] raw: 0100000000000200 ffff8880087a0c80 ffffea0000386380 dead000000000004 [ 39.071066] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f598c01 [ 39.071956] page dumped because: kasan: bad access detected [ 39.072615] [ 39.072830] Memory state around the buggy address: [ 39.073402] ffff88800d9dbc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.074255] ffff88800d9dbc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.075097] >ffff88800d9dbd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.075940] ^ [ 39.076370] ffff88800d9dbd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.077219] ffff88800d9dbe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.078058] ================================================================== [ 39.079020] Disabling lock debugging due to kernel taint [ 41.027653] BUG: Bad rss-counter state mm:000000007854c85a type:MM_FILEPAGES val:33 [ 41.029290] BUG: Bad rss-counter state mm:000000007854c85a type:MM_ANONPAGES val:22 [ 41.572783] BUG: Bad rss-counter state mm:000000004e2f64ff type:MM_FILEPAGES val:33 [ 41.573964] BUG: Bad rss-counter state mm:000000004e2f64ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12532' (ECDSA) to the list of known hosts. 2023/06/21 07:36:49 fuzzer started 2023/06/21 07:36:49 dialing manager at localhost:36067 2023/06/21 07:36:49 checking machine... 2023/06/21 07:36:49 checking revisions... [ 42.272680] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:36:50 testing simple program... [ 42.317393] cgroup: Unknown subsys name 'net' [ 42.384807] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:36:49 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff864bf101 RDX=ffffffff85407f48 RSI=0000000000000000 RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff864bf1b8 R9 =ffff88806ce09ad8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e0b92e0 RIP=ffffffff81130340 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 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=00007f76b23b8960 CR3=000000000e954000 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=2039343a36333a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a36333a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e3bfe40 RCX=ffff88800844f780 RDX=ffffea000025c740 RSI=ffff88800971d000 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888015b0fa38 R8 =ffff88800971dab0 R9 =0000000000000000 R10=ffffea000025c740 R11=00000000800d0008 R12=dffffc0000000000 R13=ffff888015b0fa78 R14=ffff88800844f780 R15=ffff88800971d000 RIP=ffffffff81810316 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 00007f3073d21900 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=00007fff50481000 CR3=0000000016d10000 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=6720646572637465733a4d41503d706f 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