syzkaller login: [ 40.497914] BUG: Bad rss-counter state mm:00000000af4fc5c6 type:MM_FILEPAGES val:33 [ 40.499604] BUG: Bad rss-counter state mm:00000000af4fc5c6 type:MM_ANONPAGES val:22 [ 40.659783] ================================================================== [ 40.660646] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.661573] Read of size 8 at addr ffff88800ed70310 by task sshd/220 [ 40.662320] [ 40.662614] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.663467] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.664406] Call Trace: [ 40.664730] [ 40.665007] dump_stack_lvl+0x91/0xf0 [ 40.665479] print_report+0xcc/0x620 [ 40.665962] ? __virt_addr_valid+0x102/0x340 [ 40.666523] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.667126] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.667726] kasan_report+0xbe/0xf0 [ 40.668189] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.668788] vma_interval_tree_remove+0xc75/0xec0 [ 40.669375] vma_prepare+0xc54/0x11a0 [ 40.669871] __split_vma+0x5af/0x950 [ 40.670328] ? __pfx___split_vma+0x10/0x10 [ 40.670840] ? find_held_lock+0x2c/0x110 [ 40.671344] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.671931] ? lock_is_held_type+0x9f/0x120 [ 40.672458] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.673049] ? mtree_range_walk+0x632/0x900 [ 40.673594] ? mas_walk+0x5c7/0x7c0 [ 40.674060] do_vmi_munmap+0x1f1/0x2b0 [ 40.674538] mmap_region+0x1f9/0x2660 [ 40.675013] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.675507] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.676201] ? __pfx_lock_acquire+0x10/0x10 [ 40.676714] ? __pfx_mmap_region+0x10/0x10 [ 40.677241] ? security_mmap_addr+0x7d/0xa0 [ 40.677767] ? get_unmapped_area+0x1f5/0x3f0 [ 40.678304] do_mmap+0x854/0xf00 [ 40.678734] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.679216] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.679774] ksys_mmap_pgoff+0x3af/0x500 [ 40.680263] do_syscall_64+0x3f/0x90 [ 40.680727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.681353] RIP: 0033:0x7f164c99fd82 [ 40.681943] 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 [ 40.684075] RSP: 002b:00007ffd14343618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.684989] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f164c99fd82 [ 40.685856] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f164bdd9000 [ 40.686819] RBP: 00007f164bdd9000 R08: 0000000000000009 R09: 0000000000001000 [ 40.687642] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556665d2dec0 [ 40.688457] R13: 00007ffd14343630 R14: 00007ffd14343660 R15: 00007ffd143439c0 [ 40.689287] [ 40.689586] [ 40.689800] Allocated by task 213: [ 40.690215] kasan_save_stack+0x22/0x50 [ 40.690709] kasan_set_track+0x25/0x30 [ 40.691197] __kasan_slab_alloc+0x59/0x70 [ 40.691709] kmem_cache_alloc+0x16b/0x370 [ 40.692209] vm_area_dup+0x20/0x160 [ 40.692650] __split_vma+0x170/0x950 [ 40.693099] split_vma+0xc6/0x110 [ 40.693531] mprotect_fixup+0x8d2/0xb30 [ 40.694024] do_mprotect_pkey+0x87e/0xd40 [ 40.694526] __x64_sys_mprotect+0x78/0xc0 [ 40.695027] do_syscall_64+0x3f/0x90 [ 40.695487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.696125] [ 40.696333] Freed by task 19: [ 40.696709] kasan_save_stack+0x22/0x50 [ 40.697200] kasan_set_track+0x25/0x30 [ 40.697694] kasan_save_free_info+0x2b/0x50 [ 40.698210] __kasan_slab_free+0x10a/0x190 [ 40.698731] kmem_cache_free+0x10d/0x4d0 [ 40.699218] rcu_core+0x8c8/0x2860 [ 40.699652] __do_softirq+0x1b7/0x7d4 [ 40.700114] [ 40.700324] Last potentially related work creation: [ 40.700890] kasan_save_stack+0x22/0x50 [ 40.701383] __kasan_record_aux_stack+0x8e/0xa0 [ 40.701946] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.702571] remove_vma+0x139/0x170 [ 40.703007] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.703548] do_vmi_munmap+0x1f1/0x2b0 [ 40.704021] __vm_munmap+0x138/0x3a0 [ 40.704472] __x64_sys_munmap+0x59/0x80 [ 40.704957] do_syscall_64+0x3f/0x90 [ 40.705413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.706051] [ 40.706260] The buggy address belongs to the object at ffff88800ed702b8 [ 40.706260] which belongs to the cache vm_area_struct of size 168 [ 40.707675] The buggy address is located 88 bytes inside of [ 40.707675] freed 168-byte region [ffff88800ed702b8, ffff88800ed70360) [ 40.709028] [ 40.709238] The buggy address belongs to the physical page: [ 40.709883] page:00000000f13d89ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed70 [ 40.710935] memcg:ffff8880146ac501 [ 40.711346] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.712032] page_type: 0xffffffff() [ 40.712472] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 40.713354] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146ac501 [ 40.714251] page dumped because: kasan: bad access detected [ 40.714889] [ 40.715097] Memory state around the buggy address: [ 40.715660] ffff88800ed70200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 40.716488] ffff88800ed70280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.717312] >ffff88800ed70300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.718134] ^ [ 40.718586] ffff88800ed70380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 40.719423] ffff88800ed70400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 40.720246] ================================================================== [ 40.721269] Disabling lock debugging due to kernel taint [ 42.671904] BUG: Bad rss-counter state mm:000000009e880fed type:MM_FILEPAGES val:33 [ 42.672951] BUG: Bad rss-counter state mm:000000009e880fed type:MM_ANONPAGES val:22 [ 43.108504] BUG: Bad rss-counter state mm:00000000f290b4f6 type:MM_FILEPAGES val:33 [ 43.109494] BUG: Bad rss-counter state mm:00000000f290b4f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15829' (ECDSA) to the list of known hosts. 2023/06/20 06:21:16 fuzzer started 2023/06/20 06:21:17 dialing manager at localhost:44161 2023/06/20 06:21:17 checking machine... 2023/06/20 06:21:17 checking revisions... [ 43.870384] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:21:17 testing simple program... [ 43.917751] cgroup: Unknown subsys name 'net' [ 43.951140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:21:07 Registers: info registers vcpu 0 RAX=0000000000001fb5 RBX=0000000000001fb0 RCX=00007f48340008d0 RDX=00000000000001f9 RSI=00007f4834000b90 RDI=00007f4834000020 RBP=00007f4834000020 RSP=00007f4840bc3680 R8 =00007f4840bc7700 R9 =000055a56e90de88 R10=0000000000000000 R11=0000000000000246 R12=00007f4834000b90 R13=0000000000000000 R14=00007f4834000ba0 R15=00007f4840bc3788 RIP=00007f4840fde9c6 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4840bc7700 00000000 00000000 GS =0000 0000000000000000 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=00007f963ff3d0b0 CR3=000000001594e000 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=31323a3630203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303932 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=0000000000000001 RBX=000000000000009d RCX=ffffffff8186b960 RDX=ffffed1001d101a1 RSI=0000000000000004 RDI=ffff88800e880d00 RBP=ffff88800ca85680 RSP=ffff88806cf09e48 R8 =0000000000000001 R9 =ffffed1001d101a0 R10=ffff88800e880d03 R11=0000000000000000 R12=ffff88800e880d00 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff88800ca85680 RIP=ffffffff8186b965 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 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=00007f3ab0373bc0 CR3=000000000d6a6000 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=15678b8b6b98dc825d4b6a4f2f856b46 XMM02=ec2efd57dc4c00df000000000011eb28 XMM03=089920b7eaf43588000000000011ebf8 XMM04=e858bcb52c9a544900000000000ae988 XMM05=19e9129bd510f23500000000001353f8 XMM06=54dd14280820dd810000000000134260 XMM07=e042d86d42eb936e0000000000125ae8 XMM08=089920b7eaf43588000000000011ebf8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000