syzkaller login: [ 30.363743] BUG: Bad rss-counter state mm:000000001f568400 type:MM_FILEPAGES val:33 [ 30.365824] BUG: Bad rss-counter state mm:000000001f568400 type:MM_ANONPAGES val:22 [ 30.538977] ================================================================== [ 30.539907] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.540870] Read of size 8 at addr ffff888019cde5c8 by task sshd/219 [ 30.541657] [ 30.541881] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.542890] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.543899] Call Trace: [ 30.544242] [ 30.544524] dump_stack_lvl+0x91/0xf0 [ 30.545039] print_report+0xcc/0x620 [ 30.545542] ? __virt_addr_valid+0x102/0x340 [ 30.546128] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.546792] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.547437] kasan_report+0xbe/0xf0 [ 30.547941] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.548566] vma_interval_tree_remove+0xc75/0xec0 [ 30.549206] vma_prepare+0xc54/0x11a0 [ 30.549697] __split_vma+0x5af/0x950 [ 30.550200] ? __pfx___split_vma+0x10/0x10 [ 30.550744] ? find_held_lock+0x2c/0x110 [ 30.551284] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.551850] ? lock_is_held_type+0x9f/0x120 [ 30.552410] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.553040] ? mtree_range_walk+0x632/0x900 [ 30.553604] ? mas_walk+0x5c7/0x7c0 [ 30.554111] do_vmi_munmap+0x1f1/0x2b0 [ 30.554632] mmap_region+0x1f9/0x2660 [ 30.555158] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.555681] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.556577] ? __pfx_lock_acquire+0x10/0x10 [ 30.557128] ? __pfx_mmap_region+0x10/0x10 [ 30.557662] ? security_mmap_addr+0x7d/0xa0 [ 30.558219] ? get_unmapped_area+0x1f5/0x3f0 [ 30.558789] do_mmap+0x854/0xf00 [ 30.559248] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.559751] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.560346] ksys_mmap_pgoff+0x3af/0x500 [ 30.560867] do_syscall_64+0x3f/0x90 [ 30.561369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.562044] RIP: 0033:0x7f603d31dd82 [ 30.562507] 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 [ 30.564739] RSP: 002b:00007fff8f3fb278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.565705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f603d31dd82 [ 30.566573] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f603c757000 [ 30.567431] RBP: 00007f603c757000 R08: 0000000000000009 R09: 0000000000001000 [ 30.568288] R10: 0000000000000812 R11: 0000000000000206 R12: 00005556a3467ec0 [ 30.569160] R13: 00007fff8f3fb290 R14: 00007fff8f3fb2c0 R15: 00007fff8f3fb620 [ 30.570032] [ 30.570331] [ 30.570563] Allocated by task 212: [ 30.570996] kasan_save_stack+0x22/0x50 [ 30.571506] kasan_set_track+0x25/0x30 [ 30.571999] __kasan_slab_alloc+0x59/0x70 [ 30.572527] kmem_cache_alloc+0x16b/0x370 [ 30.573054] vm_area_dup+0x20/0x160 [ 30.573510] __split_vma+0x170/0x950 [ 30.573983] split_vma+0xc6/0x110 [ 30.574428] mprotect_fixup+0x8d2/0xb30 [ 30.574948] do_mprotect_pkey+0x87e/0xd40 [ 30.575475] __x64_sys_mprotect+0x78/0xc0 [ 30.576001] do_syscall_64+0x3f/0x90 [ 30.576479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.577134] [ 30.577348] Freed by task 212: [ 30.577747] kasan_save_stack+0x22/0x50 [ 30.578264] kasan_set_track+0x25/0x30 [ 30.578783] kasan_save_free_info+0x2b/0x50 [ 30.579327] __kasan_slab_free+0x10a/0x190 [ 30.579865] kmem_cache_free+0x10d/0x4d0 [ 30.580381] rcu_core+0x8c8/0x2860 [ 30.580837] __do_softirq+0x1b7/0x7d4 [ 30.581317] [ 30.581538] Last potentially related work creation: [ 30.582144] kasan_save_stack+0x22/0x50 [ 30.582658] __kasan_record_aux_stack+0x8e/0xa0 [ 30.583231] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.583873] remove_vma+0x139/0x170 [ 30.584320] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.584880] do_vmi_munmap+0x1f1/0x2b0 [ 30.585363] __vm_munmap+0x138/0x3a0 [ 30.585837] __x64_sys_munmap+0x59/0x80 [ 30.586338] do_syscall_64+0x3f/0x90 [ 30.586837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.587476] [ 30.587693] The buggy address belongs to the object at ffff888019cde570 [ 30.587693] which belongs to the cache vm_area_struct of size 168 [ 30.589155] The buggy address is located 88 bytes inside of [ 30.589155] freed 168-byte region [ffff888019cde570, ffff888019cde618) [ 30.590579] [ 30.590795] The buggy address belongs to the physical page: [ 30.591448] page:0000000047586868 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cde [ 30.592548] memcg:ffff888019ee3a01 [ 30.592978] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.593618] page_type: 0xffffffff() [ 30.594074] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.594998] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ee3a01 [ 30.595910] page dumped because: kasan: bad access detected [ 30.596573] [ 30.596787] Memory state around the buggy address: [ 30.597366] ffff888019cde480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.598237] ffff888019cde500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.599117] >ffff888019cde580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.599967] ^ [ 30.600632] ffff888019cde600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.601486] ffff888019cde680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.602335] ================================================================== [ 30.603410] Disabling lock debugging due to kernel taint [ 32.621832] BUG: Bad rss-counter state mm:000000003b0bcec9 type:MM_FILEPAGES val:33 [ 32.622456] BUG: Bad rss-counter state mm:000000003b0bcec9 type:MM_ANONPAGES val:22 [ 33.097404] BUG: Bad rss-counter state mm:00000000ba4f7627 type:MM_FILEPAGES val:33 [ 33.098409] BUG: Bad rss-counter state mm:00000000ba4f7627 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53951' (ECDSA) to the list of known hosts. 2023/06/20 20:35:27 fuzzer started 2023/06/20 20:35:28 dialing manager at localhost:36067 2023/06/20 20:35:28 checking machine... 2023/06/20 20:35:28 checking revisions... [ 33.825410] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:35:28 testing simple program... [ 33.878506] cgroup: Unknown subsys name 'net' [ 33.930385] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:35:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880147cf800 RCX=0000000000000001 RDX=1ffff110028f9f01 RSI=ffff8880147cfae8 RDI=ffff8880147cf808 RBP=ffff8880147cfae8 RSP=ffff8880147cf758 R8 =0000000000000001 R9 =ffff8880147cf840 R10=0000000000038001 R11=00000000000229c7 R12=0000000000000008 R13=ffff8880147cf848 R14=ffff8880147cfae8 R15=ffff8880147cf800 RIP=ffffffff81130445 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 00007f08579c7900 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=00007f0856df7d70 CR3=000000000e0ba000 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=930c7628480064b100000000000ae988 XMM05=2ea4972b13e410aa0000000000134430 XMM06=4fda316b135da52b0000000000133220 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8450cc7f RBX=0000000000000001 RCX=ffffffff863b4448 RDX=dffffc0000000000 RSI=ffff88800f0e7f38 RDI=1ffff11001e1ceb4 RBP=ffff88800f0e75a0 RSP=ffff88800f0e74d8 R8 =ffffffff863b444c R9 =ffff88800f0e7588 R10=0000000000038001 R11=000000000008abe0 R12=ffff88800f0e75a8 R13=ffff88800f0e7590 R14=ffff88800f0e7f40 R15=ffff88800f0e7548 RIP=ffffffff8113106f 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 00007f9bf03ab700 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=00007f55dca45618 CR3=0000000019c24000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732037323a3533 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303535 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000