syzkaller login: [ 31.579883] BUG: Bad rss-counter state mm:00000000f08dde3c type:MM_FILEPAGES val:33 [ 31.580967] BUG: Bad rss-counter state mm:00000000f08dde3c type:MM_ANONPAGES val:22 [ 31.761852] ================================================================== [ 31.762828] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.763910] Read of size 8 at addr ffff88800f164df0 by task sshd/220 [ 31.764728] [ 31.764965] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.765880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.766934] Call Trace: [ 31.767273] [ 31.767583] dump_stack_lvl+0x91/0xf0 [ 31.768137] print_report+0xcc/0x620 [ 31.768647] ? __virt_addr_valid+0x102/0x340 [ 31.769241] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.769891] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.770544] kasan_report+0xbe/0xf0 [ 31.771059] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.771723] vma_interval_tree_remove+0xc75/0xec0 [ 31.772357] vma_prepare+0xc54/0x11a0 [ 31.772867] __split_vma+0x5af/0x950 [ 31.773371] ? __pfx___split_vma+0x10/0x10 [ 31.773933] ? find_held_lock+0x2c/0x110 [ 31.774493] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.775122] ? lock_is_held_type+0x9f/0x120 [ 31.775699] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.776346] ? mtree_range_walk+0x632/0x900 [ 31.776927] ? mas_walk+0x5c7/0x7c0 [ 31.777426] do_vmi_munmap+0x1f1/0x2b0 [ 31.777946] mmap_region+0x1f9/0x2660 [ 31.778464] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.779024] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.779786] ? __pfx_lock_acquire+0x10/0x10 [ 31.780351] ? __pfx_mmap_region+0x10/0x10 [ 31.780913] ? security_mmap_addr+0x7d/0xa0 [ 31.781484] ? get_unmapped_area+0x1f5/0x3f0 [ 31.782070] do_mmap+0x854/0xf00 [ 31.782538] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.783072] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.783671] ksys_mmap_pgoff+0x3af/0x500 [ 31.784216] do_syscall_64+0x3f/0x90 [ 31.784725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.785413] RIP: 0033:0x7f7dc64ced82 [ 31.785901] 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 [ 31.788157] RSP: 002b:00007ffe350b5728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.789118] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7dc64ced82 [ 31.790019] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7dc5908000 [ 31.790932] RBP: 00007f7dc5908000 R08: 0000000000000009 R09: 0000000000001000 [ 31.791833] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558379d26980 [ 31.792733] R13: 00007ffe350b5740 R14: 00007ffe350b5770 R15: 00007ffe350b5ad0 [ 31.793649] [ 31.793958] [ 31.794188] Allocated by task 212: [ 31.794643] kasan_save_stack+0x22/0x50 [ 31.795201] kasan_set_track+0x25/0x30 [ 31.795727] __kasan_slab_alloc+0x59/0x70 [ 31.796281] kmem_cache_alloc+0x16b/0x370 [ 31.796834] vm_area_dup+0x20/0x160 [ 31.797322] __split_vma+0x170/0x950 [ 31.797828] split_vma+0xc6/0x110 [ 31.798293] mprotect_fixup+0x8d2/0xb30 [ 31.798835] do_mprotect_pkey+0x87e/0xd40 [ 31.799388] __x64_sys_mprotect+0x78/0xc0 [ 31.799941] do_syscall_64+0x3f/0x90 [ 31.800450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.801133] [ 31.801364] Freed by task 212: [ 31.801778] kasan_save_stack+0x22/0x50 [ 31.802312] kasan_set_track+0x25/0x30 [ 31.802843] kasan_save_free_info+0x2b/0x50 [ 31.803417] __kasan_slab_free+0x10a/0x190 [ 31.803983] kmem_cache_free+0x10d/0x4d0 [ 31.804526] rcu_core+0x8c8/0x2860 [ 31.804997] __do_softirq+0x1b7/0x7d4 [ 31.805509] [ 31.805742] Last potentially related work creation: [ 31.806369] kasan_save_stack+0x22/0x50 [ 31.806925] __kasan_record_aux_stack+0x8e/0xa0 [ 31.807536] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.808225] remove_vma+0x139/0x170 [ 31.808710] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.809308] do_vmi_munmap+0x1f1/0x2b0 [ 31.809832] __vm_munmap+0x138/0x3a0 [ 31.810339] __x64_sys_munmap+0x59/0x80 [ 31.810879] do_syscall_64+0x3f/0x90 [ 31.811384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.812075] [ 31.812305] The buggy address belongs to the object at ffff88800f164d98 [ 31.812305] which belongs to the cache vm_area_struct of size 168 [ 31.813873] The buggy address is located 88 bytes inside of [ 31.813873] freed 168-byte region [ffff88800f164d98, ffff88800f164e40) [ 31.815383] [ 31.815616] The buggy address belongs to the physical page: [ 31.816318] page:0000000080ffe65e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf164 [ 31.817472] memcg:ffff888016ad7601 [ 31.817934] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.818631] page_type: 0xffffffff() [ 31.819127] raw: 0100000000000200 ffff8880087a0c80 ffffea0000392c40 dead000000000006 [ 31.820131] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ad7601 [ 31.821118] page dumped because: kasan: bad access detected [ 31.821821] [ 31.822053] Memory state around the buggy address: [ 31.822678] ffff88800f164c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.823619] ffff88800f164d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.824536] >ffff88800f164d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.825440] ^ [ 31.826291] ffff88800f164e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.827197] ffff88800f164e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.828096] ================================================================== [ 31.829186] Disabling lock debugging due to kernel taint [ 34.188119] BUG: Bad rss-counter state mm:000000005fa00fdc type:MM_FILEPAGES val:33 [ 34.189445] BUG: Bad rss-counter state mm:000000005fa00fdc type:MM_ANONPAGES val:22 [ 34.567692] BUG: Bad rss-counter state mm:00000000ac30b28b type:MM_FILEPAGES val:33 [ 34.568789] BUG: Bad rss-counter state mm:00000000ac30b28b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55764' (ECDSA) to the list of known hosts. 2023/06/21 08:45:31 fuzzer started 2023/06/21 08:45:31 dialing manager at localhost:36067 2023/06/21 08:45:31 checking machine... 2023/06/21 08:45:31 checking revisions... [ 35.334835] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:45:31 testing simple program... [ 35.404295] cgroup: Unknown subsys name 'net' [ 35.468724] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:45:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000010000 RCX=0000000000000000 RDX=1ffff1100d9c6939 RSI=ffffffff81598848 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff88806ce09dc0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=fffffffffffffe97 R13=ffff88806ce2c240 R14=ffff8880168df938 R15=dffffc0000000000 RIP=ffffffff815988b7 RFL=00000046 [---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 00007f146cdc4900 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=00007f146d379650 CR3=000000001c9ca000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff8617f7d6 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880182b74d0 RSP=ffff8880182b7408 R8 =ffffffff8617f7da R9 =ffff8880182b74b8 R10=0000000000038001 R11=000000000002c9cc R12=ffff8880182b74d8 R13=ffff8880182b74c0 R14=ffff8880182b7ac8 R15=ffff8880182b7478 RIP=ffffffff81130bc1 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 00007f0926ebf700 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=00007ffe04f917e8 CR3=0000000016308000 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=2030333a35343a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a35343a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000