syzkaller login: [ 30.526665] sshd (212) used greatest stack depth: 24128 bytes left [ 30.528347] BUG: Bad rss-counter state mm:00000000bdd37ce8 type:MM_FILEPAGES val:33 [ 30.529954] BUG: Bad rss-counter state mm:00000000bdd37ce8 type:MM_ANONPAGES val:22 [ 30.675421] ================================================================== [ 30.676324] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.677263] Read of size 8 at addr ffff88800f698310 by task sshd/220 [ 30.678051] [ 30.678272] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.679278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.680259] Call Trace: [ 30.680577] [ 30.680866] dump_stack_lvl+0x91/0xf0 [ 30.681475] print_report+0xcc/0x620 [ 30.682060] ? __virt_addr_valid+0x102/0x340 [ 30.682784] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.683515] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.684245] kasan_report+0xbe/0xf0 [ 30.684805] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.685567] vma_interval_tree_remove+0xc75/0xec0 [ 30.686331] vma_prepare+0xc54/0x11a0 [ 30.686957] __split_vma+0x5af/0x950 [ 30.687684] ? __pfx___split_vma+0x10/0x10 [ 30.688421] ? find_held_lock+0x2c/0x110 [ 30.689067] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.689779] ? lock_is_held_type+0x9f/0x120 [ 30.690507] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.691188] ? mtree_range_walk+0x632/0x900 [ 30.691771] ? mas_walk+0x5c7/0x7c0 [ 30.692245] do_vmi_munmap+0x1f1/0x2b0 [ 30.692733] mmap_region+0x1f9/0x2660 [ 30.693223] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.693734] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.694497] ? __pfx_lock_acquire+0x10/0x10 [ 30.695044] ? __pfx_mmap_region+0x10/0x10 [ 30.695578] ? security_mmap_addr+0x7d/0xa0 [ 30.696120] ? get_unmapped_area+0x1f5/0x3f0 [ 30.696676] do_mmap+0x854/0xf00 [ 30.697117] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.697654] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.698217] ksys_mmap_pgoff+0x3af/0x500 [ 30.698727] do_syscall_64+0x3f/0x90 [ 30.699212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.699865] RIP: 0033:0x7fd8e31b5d82 [ 30.700329] 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 [ 30.702489] RSP: 002b:00007ffd2acaf788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.703388] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd8e31b5d82 [ 30.704234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd8e25ef000 [ 30.705073] RBP: 00007fd8e25ef000 R08: 0000000000000009 R09: 0000000000001000 [ 30.705915] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd93e1bec0 [ 30.706772] R13: 00007ffd2acaf7a0 R14: 00007ffd2acaf7d0 R15: 00007ffd2acafb30 [ 30.707629] [ 30.707919] [ 30.708137] Allocated by task 212: [ 30.708570] kasan_save_stack+0x22/0x50 [ 30.709074] kasan_set_track+0x25/0x30 [ 30.709604] __kasan_slab_alloc+0x59/0x70 [ 30.710131] kmem_cache_alloc+0x16b/0x370 [ 30.710675] vm_area_dup+0x20/0x160 [ 30.711131] __split_vma+0x170/0x950 [ 30.711593] split_vma+0xc6/0x110 [ 30.712035] mprotect_fixup+0x8d2/0xb30 [ 30.712538] do_mprotect_pkey+0x87e/0xd40 [ 30.713064] __x64_sys_mprotect+0x78/0xc0 [ 30.713615] do_syscall_64+0x3f/0x90 [ 30.714091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.714749] [ 30.714965] Freed by task 212: [ 30.715362] kasan_save_stack+0x22/0x50 [ 30.715860] kasan_set_track+0x25/0x30 [ 30.716348] kasan_save_free_info+0x2b/0x50 [ 30.716879] __kasan_slab_free+0x10a/0x190 [ 30.717451] kmem_cache_free+0x10d/0x4d0 [ 30.717961] rcu_core+0x8c8/0x2860 [ 30.718411] __do_softirq+0x1b7/0x7d4 [ 30.718921] [ 30.719140] Last potentially related work creation: [ 30.719730] kasan_save_stack+0x22/0x50 [ 30.720233] __kasan_record_aux_stack+0x8e/0xa0 [ 30.720801] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.721484] remove_vma+0x139/0x170 [ 30.721942] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.722514] do_vmi_munmap+0x1f1/0x2b0 [ 30.722997] __vm_munmap+0x138/0x3a0 [ 30.723467] __x64_sys_munmap+0x59/0x80 [ 30.723966] do_syscall_64+0x3f/0x90 [ 30.724446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.725084] [ 30.725325] The buggy address belongs to the object at ffff88800f6982b8 [ 30.725325] which belongs to the cache vm_area_struct of size 168 [ 30.726822] The buggy address is located 88 bytes inside of [ 30.726822] freed 168-byte region [ffff88800f6982b8, ffff88800f698360) [ 30.728227] [ 30.728442] The buggy address belongs to the physical page: [ 30.729114] page:00000000db90e286 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf698 [ 30.730239] memcg:ffff88800e609001 [ 30.730690] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.731395] page_type: 0xffffffff() [ 30.731842] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.732769] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e609001 [ 30.733718] page dumped because: kasan: bad access detected [ 30.734386] [ 30.734619] Memory state around the buggy address: [ 30.735205] ffff88800f698200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.736061] ffff88800f698280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.736927] >ffff88800f698300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.737808] ^ [ 30.738280] ffff88800f698380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.739168] ffff88800f698400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.740015] ================================================================== [ 30.741179] Disabling lock debugging due to kernel taint [ 33.307557] BUG: Bad rss-counter state mm:0000000028de057e type:MM_FILEPAGES val:32 [ 33.308631] BUG: Bad rss-counter state mm:0000000028de057e type:MM_ANONPAGES val:22 [ 33.783087] BUG: Bad rss-counter state mm:0000000092e83591 type:MM_FILEPAGES val:33 [ 33.784511] BUG: Bad rss-counter state mm:0000000092e83591 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13404' (ECDSA) to the list of known hosts. 2023/06/19 20:42:52 fuzzer started 2023/06/19 20:42:52 dialing manager at localhost:44161 2023/06/19 20:42:52 checking machine... 2023/06/19 20:42:52 checking revisions... [ 34.563730] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:42:52 testing simple program... [ 34.618679] cgroup: Unknown subsys name 'net' [ 34.666904] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:42:50 Registers: info registers vcpu 0 RAX=1ffffffff0bcc786 RBX=ffffffff85e63c34 RCX=ffffffff81f553e2 RDX=0000000000000000 RSI=ffffffff861d1ff6 RDI=ffffffff85e63bf0 RBP=ffffffff85e63c34 RSP=ffff8880143af350 R8 =ffffffff861d1ff6 R9 =ffff8880143af448 R10=0000000000038001 R11=000000000003aa07 R12=ffffffff85e63c38 R13=ffffffff85e63bf0 R14=ffffffff85e63c30 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-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 00007f14d4071900 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=00007f14d34e0b00 CR3=000000000f32c000 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=c457a826fd79f3ba1647459f0da314af XMM02=000000000011fa48eff9b2d0a8fce9cb XMM03=000000000011fb182c67c8bc2e329bc3 XMM04=5cb4fca25ba9284700000000000ae988 XMM05=898f5389240791420000000000135000 XMM06=4fda316b135da52b0000000000133df0 XMM07=fb795ef6d657705600000000001241f0 XMM08=2c67c8bc2e329bc3000000000011fab8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800d79a900 RCX=0000000000000000 RDX=ffff88800c8f8000 RSI=ffffffff8185192c RDI=ffff88800d79a900 RBP=ffff8880192a4808 RSP=ffff88801641fa78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88801641fc48 R13=ffff88800d79a900 R14=0000000000008000 R15=ffff88800d79a910 RIP=ffffffff814c07e4 RFL=00000293 [--S-A-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 00007f2461063900 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=00007ffd296f0000 CR3=00000000100f2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000