syzkaller login: [ 112.544820] BUG: Bad rss-counter state mm:00000000b2132287 type:MM_FILEPAGES val:33 [ 112.545846] BUG: Bad rss-counter state mm:00000000b2132287 type:MM_ANONPAGES val:22 [ 112.719103] ================================================================== [ 112.720120] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 112.721162] Read of size 8 at addr ffff888016834b38 by task sshd/220 [ 112.722062] [ 112.722296] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 112.723397] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 112.724475] Call Trace: [ 112.724818] [ 112.725128] dump_stack_lvl+0x91/0xf0 [ 112.725671] print_report+0xcc/0x620 [ 112.726190] ? __virt_addr_valid+0x102/0x340 [ 112.726777] ? vma_interval_tree_remove+0xc75/0xec0 [ 112.727450] ? vma_interval_tree_remove+0xc75/0xec0 [ 112.728149] kasan_report+0xbe/0xf0 [ 112.728664] ? vma_interval_tree_remove+0xc75/0xec0 [ 112.729343] vma_interval_tree_remove+0xc75/0xec0 [ 112.730049] vma_prepare+0xc54/0x11a0 [ 112.730566] __split_vma+0x5af/0x950 [ 112.731101] ? __pfx___split_vma+0x10/0x10 [ 112.731678] ? find_held_lock+0x2c/0x110 [ 112.732289] do_vmi_align_munmap+0x2ba/0x11f0 [ 112.732933] ? lock_is_held_type+0x9f/0x120 [ 112.733533] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 112.734211] ? mtree_range_walk+0x632/0x900 [ 112.734823] ? mas_walk+0x5c7/0x7c0 [ 112.735348] do_vmi_munmap+0x1f1/0x2b0 [ 112.735925] mmap_region+0x1f9/0x2660 [ 112.736463] ? vm_mmap_pgoff+0x15c/0x3a0 [ 112.737036] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 112.737847] ? __pfx_lock_acquire+0x10/0x10 [ 112.738422] ? __pfx_mmap_region+0x10/0x10 [ 112.739005] ? security_mmap_addr+0x7d/0xa0 [ 112.739594] ? get_unmapped_area+0x1f5/0x3f0 [ 112.740248] do_mmap+0x854/0xf00 [ 112.740751] vm_mmap_pgoff+0x1a6/0x3a0 [ 112.741308] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 112.741967] ksys_mmap_pgoff+0x3af/0x500 [ 112.742536] do_syscall_64+0x3f/0x90 [ 112.743067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 112.743818] RIP: 0033:0x7f771862cd82 [ 112.744360] 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 [ 112.746757] RSP: 002b:00007ffc1d8156b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 112.747795] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f771862cd82 [ 112.748809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7717a66000 [ 112.749816] RBP: 00007f7717a66000 R08: 0000000000000009 R09: 0000000000001000 [ 112.750774] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac32e2cec0 [ 112.751730] R13: 00007ffc1d8156d0 R14: 00007ffc1d815700 R15: 00007ffc1d815a60 [ 112.752756] [ 112.753100] [ 112.753346] Allocated by task 213: [ 112.753855] kasan_save_stack+0x22/0x50 [ 112.754432] kasan_set_track+0x25/0x30 [ 112.755011] __kasan_slab_alloc+0x59/0x70 [ 112.755615] kmem_cache_alloc+0x16b/0x370 [ 112.756254] vm_area_dup+0x20/0x160 [ 112.756782] __split_vma+0x170/0x950 [ 112.757330] split_vma+0xc6/0x110 [ 112.757848] mprotect_fixup+0x8d2/0xb30 [ 112.758435] do_mprotect_pkey+0x87e/0xd40 [ 112.759036] __x64_sys_mprotect+0x78/0xc0 [ 112.759640] do_syscall_64+0x3f/0x90 [ 112.760221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 112.760975] [ 112.761227] Freed by task 19: [ 112.761699] kasan_save_stack+0x22/0x50 [ 112.762314] kasan_set_track+0x25/0x30 [ 112.762921] kasan_save_free_info+0x2b/0x50 [ 112.763580] __kasan_slab_free+0x10a/0x190 [ 112.764262] kmem_cache_free+0x10d/0x4d0 [ 112.764895] rcu_core+0x8c8/0x2860 [ 112.765448] __do_softirq+0x1b7/0x7d4 [ 112.766070] [ 112.766333] Last potentially related work creation: [ 112.767061] kasan_save_stack+0x22/0x50 [ 112.767678] __kasan_record_aux_stack+0x8e/0xa0 [ 112.768427] __call_rcu_common.constprop.0+0x6a/0xb90 [ 112.769223] remove_vma+0x139/0x170 [ 112.769800] do_vmi_align_munmap+0xd4a/0x11f0 [ 112.770502] do_vmi_munmap+0x1f1/0x2b0 [ 112.771118] __vm_munmap+0x138/0x3a0 [ 112.771693] __x64_sys_munmap+0x59/0x80 [ 112.772339] do_syscall_64+0x3f/0x90 [ 112.772940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 112.773764] [ 112.774040] The buggy address belongs to the object at ffff888016834ae0 [ 112.774040] which belongs to the cache vm_area_struct of size 168 [ 112.775901] The buggy address is located 88 bytes inside of [ 112.775901] freed 168-byte region [ffff888016834ae0, ffff888016834b88) [ 112.777690] [ 112.777966] The buggy address belongs to the physical page: [ 112.778782] page:00000000cb86af6c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16834 [ 112.780180] memcg:ffff88801a31be01 [ 112.780730] flags: 0x100000000000200(slab|node=0|zone=1) [ 112.781575] page_type: 0xffffffff() [ 112.782149] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 112.783334] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a31be01 [ 112.784528] page dumped because: kasan: bad access detected [ 112.785369] [ 112.785658] Memory state around the buggy address: [ 112.786398] ffff888016834a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 112.787485] ffff888016834a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 112.788627] >ffff888016834b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 112.789775] ^ [ 112.790557] ffff888016834b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 112.791618] ffff888016834c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 112.792650] ================================================================== [ 112.793932] Disabling lock debugging due to kernel taint [ 114.775059] BUG: Bad rss-counter state mm:000000005211f599 type:MM_FILEPAGES val:33 [ 114.776066] BUG: Bad rss-counter state mm:000000005211f599 type:MM_ANONPAGES val:22 [ 115.213797] BUG: Bad rss-counter state mm:00000000caaa723e type:MM_FILEPAGES val:33 [ 115.215621] BUG: Bad rss-counter state mm:00000000caaa723e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11298' (ECDSA) to the list of known hosts. 2023/06/20 03:10:43 fuzzer started 2023/06/20 03:10:43 dialing manager at localhost:44161 2023/06/20 03:10:43 checking machine... 2023/06/20 03:10:43 checking revisions... [ 115.949930] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:10:43 testing simple program... [ 116.000974] cgroup: Unknown subsys name 'net' [ 116.037484] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:09:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002d34f43 RSI=ffffffff81ef13be RDI=ffff8880169a7a88 RBP=ffff8880169a7a58 RSP=ffff8880169a79b0 R8 =0000000000000001 R9 =ffff8880169a7a00 R10=0000000000038001 R11=0000000000020cb4 R12=ffff8880169a7a88 R13=0000000000000000 R14=ffff88800d9ad1c0 R15=ffff88800eace680 RIP=ffffffff813ad42f RFL=00000286 [--S--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 00007f4852fd3900 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=00007ffda9aa5000 CR3=000000001be76000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007ff66f3cc3d0 CR3=000000000f09a000 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=2032343a30313a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a30313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000