syzkaller login: [ 41.538931] BUG: Bad rss-counter state mm:00000000f4bd4015 type:MM_FILEPAGES val:33 [ 41.540020] BUG: Bad rss-counter state mm:00000000f4bd4015 type:MM_ANONPAGES val:22 [ 41.584697] ================================================================== [ 41.585470] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.586270] Read of size 8 at addr ffff88800d961d08 by task sshd/220 [ 41.586923] [ 41.587058] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.587663] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.588375] Call Trace: [ 41.588632] [ 41.588809] dump_stack_lvl+0x91/0xf0 [ 41.589196] print_report+0xcc/0x620 [ 41.589495] ? __virt_addr_valid+0x102/0x340 [ 41.589835] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.590213] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.590599] kasan_report+0xbe/0xf0 [ 41.590897] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.591302] vma_interval_tree_remove+0xc75/0xec0 [ 41.591670] vma_prepare+0xc54/0x11a0 [ 41.591965] __split_vma+0x5af/0x950 [ 41.592256] ? __pfx___split_vma+0x10/0x10 [ 41.592580] ? find_held_lock+0x2c/0x110 [ 41.592902] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.593248] ? lock_is_held_type+0x9f/0x120 [ 41.593578] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.593960] ? mtree_range_walk+0x632/0x900 [ 41.594322] ? mas_walk+0x5c7/0x7c0 [ 41.594633] do_vmi_munmap+0x1f1/0x2b0 [ 41.594948] mmap_region+0x1f9/0x2660 [ 41.595259] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.595595] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.596062] ? __pfx_lock_acquire+0x10/0x10 [ 41.596411] ? __pfx_mmap_region+0x10/0x10 [ 41.596757] ? security_mmap_addr+0x7d/0xa0 [ 41.597102] ? get_unmapped_area+0x1f5/0x3f0 [ 41.597460] do_mmap+0x854/0xf00 [ 41.597747] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.598068] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.598435] ksys_mmap_pgoff+0x3af/0x500 [ 41.598779] do_syscall_64+0x3f/0x90 [ 41.599092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.599512] RIP: 0033:0x7f76c8860d82 [ 41.599815] 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 [ 41.601196] RSP: 002b:00007ffea2265168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.601781] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76c8860d82 [ 41.602335] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76c7c9a000 [ 41.602894] RBP: 00007f76c7c9a000 R08: 0000000000000009 R09: 0000000000001000 [ 41.603454] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c25f9f9ec0 [ 41.604015] R13: 00007ffea2265180 R14: 00007ffea22651b0 R15: 00007ffea2265510 [ 41.604578] [ 41.604766] [ 41.604904] Allocated by task 213: [ 41.605183] kasan_save_stack+0x22/0x50 [ 41.605515] kasan_set_track+0x25/0x30 [ 41.605830] __kasan_slab_alloc+0x59/0x70 [ 41.606174] kmem_cache_alloc+0x16b/0x370 [ 41.606504] vm_area_dup+0x20/0x160 [ 41.606803] __split_vma+0x170/0x950 [ 41.607110] split_vma+0xc6/0x110 [ 41.607398] mprotect_fixup+0x8d2/0xb30 [ 41.607722] do_mprotect_pkey+0x87e/0xd40 [ 41.608061] __x64_sys_mprotect+0x78/0xc0 [ 41.608399] do_syscall_64+0x3f/0x90 [ 41.608706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.609138] [ 41.609277] Freed by task 213: [ 41.609531] kasan_save_stack+0x22/0x50 [ 41.609855] kasan_set_track+0x25/0x30 [ 41.610182] kasan_save_free_info+0x2b/0x50 [ 41.610523] __kasan_slab_free+0x10a/0x190 [ 41.610883] kmem_cache_free+0x10d/0x4d0 [ 41.611209] rcu_core+0x8c8/0x2860 [ 41.611495] __do_softirq+0x1b7/0x7d4 [ 41.611802] [ 41.611943] Last potentially related work creation: [ 41.612324] kasan_save_stack+0x22/0x50 [ 41.612658] __kasan_record_aux_stack+0x8e/0xa0 [ 41.613032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.613454] remove_vma+0x139/0x170 [ 41.613749] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.614122] do_vmi_munmap+0x1f1/0x2b0 [ 41.614430] __vm_munmap+0x138/0x3a0 [ 41.614739] __x64_sys_munmap+0x59/0x80 [ 41.615058] do_syscall_64+0x3f/0x90 [ 41.615363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.615781] [ 41.615921] Second to last potentially related work creation: [ 41.616368] kasan_save_stack+0x22/0x50 [ 41.616688] __kasan_record_aux_stack+0x8e/0xa0 [ 41.617060] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.617475] remove_vma+0x139/0x170 [ 41.617769] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.618132] do_vmi_munmap+0x1f1/0x2b0 [ 41.618440] mmap_region+0x1f9/0x2660 [ 41.618752] do_mmap+0x854/0xf00 [ 41.619032] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.619345] ksys_mmap_pgoff+0x3af/0x500 [ 41.619668] do_syscall_64+0x3f/0x90 [ 41.619969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.620384] [ 41.620525] The buggy address belongs to the object at ffff88800d961cb0 [ 41.620525] which belongs to the cache vm_area_struct of size 168 [ 41.621490] The buggy address is located 88 bytes inside of [ 41.621490] freed 168-byte region [ffff88800d961cb0, ffff88800d961d58) [ 41.622398] [ 41.622549] The buggy address belongs to the physical page: [ 41.622983] page:00000000f065b126 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd961 [ 41.623691] memcg:ffff88800d9e3701 [ 41.623968] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.624390] page_type: 0xffffffff() [ 41.624686] raw: 0100000000000200 ffff88800879fc80 ffffea000031ee40 dead000000000004 [ 41.625299] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9e3701 [ 41.625895] page dumped because: kasan: bad access detected [ 41.626326] [ 41.626465] Memory state around the buggy address: [ 41.626855] ffff88800d961c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 41.627408] ffff88800d961c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 41.627964] >ffff88800d961d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 41.628519] ^ [ 41.628806] ffff88800d961d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.629352] ffff88800d961e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 41.629905] ================================================================== [ 41.630504] Disabling lock debugging due to kernel taint [ 43.966225] BUG: Bad rss-counter state mm:000000006e39a22f type:MM_FILEPAGES val:33 [ 43.967601] BUG: Bad rss-counter state mm:000000006e39a22f type:MM_ANONPAGES val:22 [ 44.436476] BUG: Bad rss-counter state mm:0000000047b82885 type:MM_FILEPAGES val:33 [ 44.437915] BUG: Bad rss-counter state mm:0000000047b82885 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43002' (ECDSA) to the list of known hosts. 2023/06/19 20:37:04 fuzzer started 2023/06/19 20:37:04 dialing manager at localhost:44161 2023/06/19 20:37:04 checking machine... 2023/06/19 20:37:04 checking revisions... [ 45.138178] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:37:04 testing simple program... [ 45.187119] cgroup: Unknown subsys name 'net' [ 45.224820] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:37:01 Registers: info registers vcpu 0 RAX=ffffffff810bd090 RBX=ffffffff85d8840c RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff86088c1a RDI=ffffffff85d88408 RBP=ffffffff85d88408 RSP=ffff88800c4c7418 R8 =ffffffff86088c1a R9 =ffff88800c4c7560 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d88410 R13=ffffffff85d88408 R14=ffffffff85d88408 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000283 [--S---C] 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 00007f7eeaa21700 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=00007f5777c9b618 CR3=000000000ed06000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732033303a3733 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383836 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=000000000000fdc6 RBX=0000000000000002 RCX=ffffffff813782a7 RDX=000000000000fdc8 RSI=0000000000003782 RDI=000000000002f952 RBP=ffff88806cf09a78 RSP=ffff88806cf099b0 R8 =ffffffff860d1670 R9 =ffff88806cf09a60 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09a80 R13=ffff88806cf09a68 R14=ffff88806cf09a61 R15=ffff88806cf09a20 RIP=ffffffff81130843 RFL=00000246 [---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 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=00007f93d37947c0 CR3=000000000d586000 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=95d90961fb48ef90ec455b96b96cbace XMM02=000000000011df90eff9b2d0a8fce9cb XMM03=000000000011e0602c67c8bc2e329bc3 XMM04=3e84f415a6d7bcf400000000000ae988 XMM05=19e9129bd510f2350000000000134e10 XMM06=3b99cca12f709bdd0000000000133fe8 XMM07=e042d86d42eb936e0000000000124488 XMM08=0a061d3007786bef000000000011e060 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000