syzkaller login: [ 31.071799] BUG: Bad rss-counter state mm:000000002d1cc0b2 type:MM_FILEPAGES val:33 [ 31.073458] BUG: Bad rss-counter state mm:000000002d1cc0b2 type:MM_ANONPAGES val:22 [ 31.241623] ================================================================== [ 31.242555] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.243517] Read of size 8 at addr ffff88800fdc1ed8 by task sshd/221 [ 31.244430] [ 31.244648] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.245515] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.246526] Call Trace: [ 31.246843] <TASK> [ 31.247134] dump_stack_lvl+0x91/0xf0 [ 31.247642] print_report+0xcc/0x620 [ 31.248119] ? __virt_addr_valid+0x102/0x340 [ 31.248671] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.249293] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.249926] kasan_report+0xbe/0xf0 [ 31.250408] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.251022] vma_interval_tree_remove+0xc75/0xec0 [ 31.251639] vma_prepare+0xc54/0x11a0 [ 31.252125] __split_vma+0x5af/0x950 [ 31.252600] ? __pfx___split_vma+0x10/0x10 [ 31.253134] ? find_held_lock+0x2c/0x110 [ 31.253655] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.254227] ? lock_is_held_type+0x9f/0x120 [ 31.254772] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.255408] ? mtree_range_walk+0x632/0x900 [ 31.255966] ? mas_walk+0x5c7/0x7c0 [ 31.256454] do_vmi_munmap+0x1f1/0x2b0 [ 31.256946] mmap_region+0x1f9/0x2660 [ 31.257435] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.257948] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.258666] ? __pfx_lock_acquire+0x10/0x10 [ 31.259225] ? __pfx_mmap_region+0x10/0x10 [ 31.259773] ? security_mmap_addr+0x7d/0xa0 [ 31.260307] ? get_unmapped_area+0x1f5/0x3f0 [ 31.260866] do_mmap+0x854/0xf00 [ 31.261302] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.261817] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.262387] ksys_mmap_pgoff+0x3af/0x500 [ 31.262898] do_syscall_64+0x3f/0x90 [ 31.263407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.264068] RIP: 0033:0x7f1986ea5d82 [ 31.264528] 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 [ 31.266684] RSP: 002b:00007ffc59b276d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.267603] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1986ea5d82 [ 31.268477] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19862df000 [ 31.269340] RBP: 00007f19862df000 R08: 0000000000000009 R09: 0000000000001000 [ 31.270197] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605ce4bab20 [ 31.271059] R13: 00007ffc59b276f0 R14: 00007ffc59b27720 R15: 00007ffc59b27a80 [ 31.271944] </TASK> [ 31.272241] [ 31.272461] Allocated by task 214: [ 31.272889] kasan_save_stack+0x22/0x50 [ 31.273394] kasan_set_track+0x25/0x30 [ 31.273884] __kasan_slab_alloc+0x59/0x70 [ 31.274414] kmem_cache_alloc+0x16b/0x370 [ 31.274930] vm_area_dup+0x20/0x160 [ 31.275405] __split_vma+0x170/0x950 [ 31.275884] split_vma+0xc6/0x110 [ 31.276336] mprotect_fixup+0x8d2/0xb30 [ 31.276849] do_mprotect_pkey+0x87e/0xd40 [ 31.277373] __x64_sys_mprotect+0x78/0xc0 [ 31.277896] do_syscall_64+0x3f/0x90 [ 31.278367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.279028] [ 31.279268] Freed by task 214: [ 31.279680] kasan_save_stack+0x22/0x50 [ 31.280188] kasan_set_track+0x25/0x30 [ 31.280696] kasan_save_free_info+0x2b/0x50 [ 31.281231] __kasan_slab_free+0x10a/0x190 [ 31.281783] kmem_cache_free+0x10d/0x4d0 [ 31.282305] rcu_core+0x8c8/0x2860 [ 31.282759] __do_softirq+0x1b7/0x7d4 [ 31.283250] [ 31.283464] Last potentially related work creation: [ 31.284062] kasan_save_stack+0x22/0x50 [ 31.284570] __kasan_record_aux_stack+0x8e/0xa0 [ 31.285138] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.285787] remove_vma+0x139/0x170 [ 31.286248] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.286806] do_vmi_munmap+0x1f1/0x2b0 [ 31.287306] __vm_munmap+0x138/0x3a0 [ 31.287776] __x64_sys_munmap+0x59/0x80 [ 31.288269] do_syscall_64+0x3f/0x90 [ 31.288759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.289415] [ 31.289638] The buggy address belongs to the object at ffff88800fdc1e80 [ 31.289638] which belongs to the cache vm_area_struct of size 168 [ 31.291141] The buggy address is located 88 bytes inside of [ 31.291141] freed 168-byte region [ffff88800fdc1e80, ffff88800fdc1f28) [ 31.292575] [ 31.292791] The buggy address belongs to the physical page: [ 31.293451] page:000000005015844a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdc1 [ 31.294544] memcg:ffff8880146ab301 [ 31.294992] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.295668] page_type: 0xffffffff() [ 31.296123] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.297090] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146ab301 [ 31.297996] page dumped because: kasan: bad access detected [ 31.298654] [ 31.298872] Memory state around the buggy address: [ 31.299457] ffff88800fdc1d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.300324] ffff88800fdc1e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.301181] >ffff88800fdc1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.302027] ^ [ 31.302762] ffff88800fdc1f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.303647] ffff88800fdc1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.304513] ================================================================== [ 31.305502] Disabling lock debugging due to kernel taint [ 34.061573] BUG: Bad rss-counter state mm:00000000fc53e44e type:MM_FILEPAGES val:33 [ 34.062342] BUG: Bad rss-counter state mm:00000000fc53e44e type:MM_ANONPAGES val:22 [ 34.470842] BUG: Bad rss-counter state mm:00000000d3a1228b type:MM_FILEPAGES val:33 [ 34.471634] BUG: Bad rss-counter state mm:00000000d3a1228b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58761' (ECDSA) to the list of known hosts. 2023/06/21 07:49:09 fuzzer started 2023/06/21 07:49:09 dialing manager at localhost:36067 2023/06/21 07:49:09 checking machine... 2023/06/21 07:49:09 checking revisions... [ 35.112692] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:49:09 testing simple program... [ 35.163570] cgroup: Unknown subsys name 'net' [ 35.213259] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:49:08 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800ff42ca0 RCX=ffffffff8184683f RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800dd79d10 RBP=ffff88800dd79d10 RSP=ffff88800daa7d40 R8 =0000000000000000 R9 =ffffed1001baf3b4 R10=ffff88800dd79da3 R11=00000000000b6a61 R12=0000000000000202 R13=ffff88800dd79d50 R14=ffffffff81ef10be R15=ffff888009cf3400 RIP=ffffffff84535d0d 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 00007f1446e79900 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=00007f1446397040 CR3=000000000f220000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4a41f5417ced38f100000000000ae988 XMM05=164b807cd247bb2c0000000000132db0 XMM06=c291bd5c70af25b90000000000131e50 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800daad1c0 RCX=ffff888015f874b0 RDX=ffff888015f87490 RSI=ffff88800daad1c0 RDI=ffff888015f87440 RBP=ffff888015f874b0 RSP=ffff888015f87418 R8 =0000000000000130 R9 =0000000000000000 R10=ffff888015f87490 R11=0000000000000000 R12=ffff888015f87490 R13=ffff888015f874b8 R14=ffff888015f874d8 R15=ffff888015f87490 RIP=ffffffff8450e080 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 00007ff650ef5700 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=00007f585aa25618 CR3=0000000019e9e000 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=2038303a39343a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a39343a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000