syzkaller login: [ 60.591965] BUG: Bad rss-counter state mm:0000000053385678 type:MM_FILEPAGES val:33 [ 60.593049] BUG: Bad rss-counter state mm:0000000053385678 type:MM_ANONPAGES val:22 [ 60.769100] ================================================================== [ 60.770240] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.771511] Read of size 8 at addr ffff88800da7b3f8 by task sshd/221 [ 60.772468] [ 60.772769] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.773842] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.775052] Call Trace: [ 60.775448] [ 60.775796] dump_stack_lvl+0x91/0xf0 [ 60.776417] print_report+0xcc/0x620 [ 60.777049] ? __virt_addr_valid+0x102/0x340 [ 60.777617] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.778233] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.778845] kasan_report+0xbe/0xf0 [ 60.779320] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.779935] vma_interval_tree_remove+0xc75/0xec0 [ 60.780546] vma_prepare+0xc54/0x11a0 [ 60.781029] __split_vma+0x5af/0x950 [ 60.781502] ? __pfx___split_vma+0x10/0x10 [ 60.782038] ? find_held_lock+0x2c/0x110 [ 60.782566] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.783139] ? lock_is_held_type+0x9f/0x120 [ 60.783683] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.784304] ? mtree_range_walk+0x632/0x900 [ 60.784885] ? mas_walk+0x5c7/0x7c0 [ 60.785367] do_vmi_munmap+0x1f1/0x2b0 [ 60.785862] mmap_region+0x1f9/0x2660 [ 60.786344] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.786857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.787565] ? __pfx_lock_acquire+0x10/0x10 [ 60.788100] ? __pfx_mmap_region+0x10/0x10 [ 60.788639] ? security_mmap_addr+0x7d/0xa0 [ 60.789169] ? get_unmapped_area+0x1f5/0x3f0 [ 60.789715] do_mmap+0x854/0xf00 [ 60.790159] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.790654] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.791233] ksys_mmap_pgoff+0x3af/0x500 [ 60.791753] do_syscall_64+0x3f/0x90 [ 60.792234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.792897] RIP: 0033:0x7fa906f73d82 [ 60.793356] 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 [ 60.795486] RSP: 002b:00007ffe2c392ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.796388] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa906f73d82 [ 60.797245] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa9063ad000 [ 60.798085] RBP: 00007fa9063ad000 R08: 0000000000000009 R09: 0000000000001000 [ 60.798927] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad5618fec0 [ 60.799768] R13: 00007ffe2c392ef0 R14: 00007ffe2c392f20 R15: 00007ffe2c393280 [ 60.800632] [ 60.800922] [ 60.801135] Allocated by task 214: [ 60.801558] kasan_save_stack+0x22/0x50 [ 60.802057] kasan_set_track+0x25/0x30 [ 60.802544] __kasan_slab_alloc+0x59/0x70 [ 60.803070] kmem_cache_alloc+0x16b/0x370 [ 60.803586] vm_area_dup+0x20/0x160 [ 60.804041] __split_vma+0x170/0x950 [ 60.804503] split_vma+0xc6/0x110 [ 60.804970] mprotect_fixup+0x8d2/0xb30 [ 60.805470] do_mprotect_pkey+0x87e/0xd40 [ 60.805989] __x64_sys_mprotect+0x78/0xc0 [ 60.806506] do_syscall_64+0x3f/0x90 [ 60.806977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.807613] [ 60.807827] Freed by task 214: [ 60.808219] kasan_save_stack+0x22/0x50 [ 60.808729] kasan_set_track+0x25/0x30 [ 60.809218] kasan_save_free_info+0x2b/0x50 [ 60.809755] __kasan_slab_free+0x10a/0x190 [ 60.810291] kmem_cache_free+0x10d/0x4d0 [ 60.810794] rcu_core+0x8c8/0x2860 [ 60.811349] __do_softirq+0x1b7/0x7d4 [ 60.811828] [ 60.812041] Last potentially related work creation: [ 60.812650] kasan_save_stack+0x22/0x50 [ 60.813148] __kasan_record_aux_stack+0x8e/0xa0 [ 60.813715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.814354] remove_vma+0x139/0x170 [ 60.814802] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.815353] do_vmi_munmap+0x1f1/0x2b0 [ 60.815833] __vm_munmap+0x138/0x3a0 [ 60.816298] __x64_sys_munmap+0x59/0x80 [ 60.816802] do_syscall_64+0x3f/0x90 [ 60.817272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.817911] [ 60.818124] The buggy address belongs to the object at ffff88800da7b3a0 [ 60.818124] which belongs to the cache vm_area_struct of size 168 [ 60.819568] The buggy address is located 88 bytes inside of [ 60.819568] freed 168-byte region [ffff88800da7b3a0, ffff88800da7b448) [ 60.820979] [ 60.821193] The buggy address belongs to the physical page: [ 60.821846] page:0000000055747f03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda7b [ 60.822914] memcg:ffff88800db05501 [ 60.823333] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.823972] page_type: 0xffffffff() [ 60.824420] raw: 0100000000000200 ffff8880087a0c80 ffffea000035efc0 dead000000000004 [ 60.825350] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db05501 [ 60.826251] page dumped because: kasan: bad access detected [ 60.826911] [ 60.827128] Memory state around the buggy address: [ 60.827699] ffff88800da7b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 60.828554] ffff88800da7b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 60.829407] >ffff88800da7b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 60.830248] ^ [ 60.831087] ffff88800da7b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 60.831940] ffff88800da7b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.832803] ================================================================== [ 60.833832] Disabling lock debugging due to kernel taint [ 63.588834] BUG: Bad rss-counter state mm:000000007d5e09ed type:MM_FILEPAGES val:33 [ 63.589822] BUG: Bad rss-counter state mm:000000007d5e09ed type:MM_ANONPAGES val:22 [ 64.072828] BUG: Bad rss-counter state mm:00000000bf04e271 type:MM_FILEPAGES val:33 [ 64.074229] BUG: Bad rss-counter state mm:00000000bf04e271 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58603' (ECDSA) to the list of known hosts. 2023/06/21 00:34:14 fuzzer started 2023/06/21 00:34:14 dialing manager at localhost:36067 2023/06/21 00:34:14 checking machine... 2023/06/21 00:34:14 checking revisions... [ 64.868719] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:34:15 testing simple program... [ 64.917263] cgroup: Unknown subsys name 'net' [ 64.956684] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:34:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffed1002d81100 RBP=ffff888008442000 RSP=ffff88800f0e7c58 R8 =ffff888016c08000 R9 =0000000000000000 R10=ffffed1002d81000 R11=00000000000b6a61 R12=ffff888016c08000 R13=0000000000000dc0 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8180ce64 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 00007f4a4f4ee900 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=00007ffd82a65000 CR3=000000001adf2000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ff7091952b0 CR3=0000000008eb8000 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=2034313a34333a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a34333a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000