[ 25.194062] BUG: Bad rss-counter state mm:00000000501bbeb7 type:MM_FILEPAGES val:33 [ 25.196015] BUG: Bad rss-counter state mm:00000000501bbeb7 type:MM_ANONPAGES val:22 [ 25.356558] ================================================================== [ 25.357508] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.358442] Read of size 8 at addr ffff8880197ffb38 by task sshd/220 [ 25.359414] [ 25.359634] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.360509] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.361497] Call Trace: [ 25.361815] [ 25.362099] dump_stack_lvl+0x91/0xf0 [ 25.362583] print_report+0xcc/0x620 [ 25.363064] ? __virt_addr_valid+0x102/0x340 [ 25.363606] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.364220] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.364865] kasan_report+0xbe/0xf0 [ 25.365339] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.365968] vma_interval_tree_remove+0xc75/0xec0 [ 25.366571] vma_prepare+0xc54/0x11a0 [ 25.367048] __split_vma+0x5af/0x950 [ 25.367515] ? __pfx___split_vma+0x10/0x10 [ 25.368048] ? find_held_lock+0x2c/0x110 [ 25.368579] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.369140] ? lock_is_held_type+0x9f/0x120 [ 25.369682] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.370293] ? mtree_range_walk+0x632/0x900 [ 25.370847] ? mas_walk+0x5c7/0x7c0 [ 25.371322] do_vmi_munmap+0x1f1/0x2b0 [ 25.371816] mmap_region+0x1f9/0x2660 [ 25.372310] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.372820] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.373535] ? __pfx_lock_acquire+0x10/0x10 [ 25.374070] ? __pfx_mmap_region+0x10/0x10 [ 25.374598] ? security_mmap_addr+0x7d/0xa0 [ 25.375128] ? get_unmapped_area+0x1f5/0x3f0 [ 25.375677] do_mmap+0x854/0xf00 [ 25.376112] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.376625] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.377186] ksys_mmap_pgoff+0x3af/0x500 [ 25.377695] do_syscall_64+0x3f/0x90 [ 25.378173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.378820] RIP: 0033:0x7f6a95f8ed82 [ 25.379273] 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 [ 25.381405] RSP: 002b:00007fffcc048d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.382312] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a95f8ed82 [ 25.383167] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a953c8000 [ 25.384015] RBP: 00007f6a953c8000 R08: 0000000000000009 R09: 0000000000001000 [ 25.384876] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db2bed3ec0 [ 25.385728] R13: 00007fffcc048da0 R14: 00007fffcc048dd0 R15: 00007fffcc049130 [ 25.386584] [ 25.386877] [ 25.387091] Allocated by task 213: [ 25.387519] kasan_save_stack+0x22/0x50 [ 25.388028] kasan_set_track+0x25/0x30 [ 25.388526] __kasan_slab_alloc+0x59/0x70 [ 25.389062] kmem_cache_alloc+0x16b/0x370 [ 25.389586] vm_area_dup+0x20/0x160 [ 25.390045] __split_vma+0x170/0x950 [ 25.390521] split_vma+0xc6/0x110 [ 25.390965] mprotect_fixup+0x8d2/0xb30 [ 25.391469] do_mprotect_pkey+0x87e/0xd40 [ 25.391989] __x64_sys_mprotect+0x78/0xc0 [ 25.392521] do_syscall_64+0x3f/0x90 [ 25.393001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.393650] [ 25.393870] Freed by task 213: [ 25.394265] kasan_save_stack+0x22/0x50 [ 25.394777] kasan_set_track+0x25/0x30 [ 25.395274] kasan_save_free_info+0x2b/0x50 [ 25.395805] __kasan_slab_free+0x10a/0x190 [ 25.396355] kmem_cache_free+0x10d/0x4d0 [ 25.396861] rcu_core+0x8c8/0x2860 [ 25.397317] __do_softirq+0x1b7/0x7d4 [ 25.397795] [ 25.398012] Last potentially related work creation: [ 25.398602] kasan_save_stack+0x22/0x50 [ 25.399109] __kasan_record_aux_stack+0x8e/0xa0 [ 25.399687] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.400346] remove_vma+0x139/0x170 [ 25.400824] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.401385] do_vmi_munmap+0x1f1/0x2b0 [ 25.401878] __vm_munmap+0x138/0x3a0 [ 25.402351] __x64_sys_munmap+0x59/0x80 [ 25.402850] do_syscall_64+0x3f/0x90 [ 25.403325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.403968] [ 25.404181] The buggy address belongs to the object at ffff8880197ffae0 [ 25.404181] which belongs to the cache vm_area_struct of size 168 [ 25.405686] The buggy address is located 88 bytes inside of [ 25.405686] freed 168-byte region [ffff8880197ffae0, ffff8880197ffb88) [ 25.407093] [ 25.407311] The buggy address belongs to the physical page: [ 25.407984] page:00000000561f92e1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x197ff [ 25.409089] memcg:ffff8880168cd901 [ 25.409524] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.410232] page_type: 0xffffffff() [ 25.410687] raw: 0100000000000200 ffff88800879fc80 ffffea00003c3840 0000000000000005 [ 25.411616] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168cd901 [ 25.412539] page dumped because: kasan: bad access detected [ 25.413206] [ 25.413425] Memory state around the buggy address: [ 25.414015] ffff8880197ffa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.414879] ffff8880197ffa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 25.415758] >ffff8880197ffb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.416660] ^ [ 25.417277] ffff8880197ffb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 25.418166] ffff8880197ffc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 25.419031] ================================================================== [ 25.419983] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.359248] BUG: Bad rss-counter state mm:0000000074623e0e type:MM_FILEPAGES val:33 [ 27.360372] BUG: Bad rss-counter state mm:0000000074623e0e type:MM_ANONPAGES val:22 [ 27.881452] BUG: Bad rss-counter state mm:00000000142a61a6 type:MM_FILEPAGES val:33 [ 27.882991] BUG: Bad rss-counter state mm:00000000142a61a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42343' (ECDSA) to the list of known hosts. 2023/06/20 00:43:32 fuzzer started 2023/06/20 00:43:32 dialing manager at localhost:44161 2023/06/20 00:43:32 checking machine... 2023/06/20 00:43:32 checking revisions... [ 28.652341] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:43:32 testing simple program... [ 28.704725] cgroup: Unknown subsys name 'net' [ 28.785808] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:43:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800eb38a00 RCX=0000000000000000 RDX=ffff8880159d0000 RSI=0000000000000008 RDI=ffff88800eb38a58 RBP=ffff88800eb38a58 RSP=ffff88800dbcfe80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000008000 R11=0000000000000000 R12=ffff88800eb38a01 R13=00007f566c031bc0 R14=dffffc0000000000 R15=000000000000005a RIP=ffffffff8180fd24 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 00007f5676dec700 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=00007f9e5e447340 CR3=000000000e2c2000 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=2031333a33343a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a33343a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f1becfdc618 CR3=000000000e2c2000 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=33343a3030203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323437 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000