syzkaller login: [ 38.769186] BUG: Bad rss-counter state mm:00000000c30a6989 type:MM_FILEPAGES val:33 [ 38.771232] BUG: Bad rss-counter state mm:00000000c30a6989 type:MM_ANONPAGES val:22 [ 38.940374] ================================================================== [ 38.941231] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.942137] Read of size 8 at addr ffff888019d0dd08 by task sshd/227 [ 38.942963] [ 38.943177] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.944029] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.944965] Call Trace: [ 38.945271] [ 38.945544] dump_stack_lvl+0x91/0xf0 [ 38.946040] print_report+0xcc/0x620 [ 38.946500] ? __virt_addr_valid+0x102/0x340 [ 38.947017] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.947638] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.948222] kasan_report+0xbe/0xf0 [ 38.948675] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.949261] vma_interval_tree_remove+0xc75/0xec0 [ 38.949836] vma_prepare+0xc54/0x11a0 [ 38.950320] __split_vma+0x5af/0x950 [ 38.950769] ? __pfx___split_vma+0x10/0x10 [ 38.951315] ? find_held_lock+0x2c/0x110 [ 38.951858] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.952417] ? lock_is_held_type+0x9f/0x120 [ 38.952955] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.953564] ? mtree_range_walk+0x632/0x900 [ 38.954128] ? mas_walk+0x5c7/0x7c0 [ 38.954594] do_vmi_munmap+0x1f1/0x2b0 [ 38.955084] mmap_region+0x1f9/0x2660 [ 38.955611] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.956124] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.956830] ? __pfx_lock_acquire+0x10/0x10 [ 38.957370] ? __pfx_mmap_region+0x10/0x10 [ 38.957895] ? security_mmap_addr+0x7d/0xa0 [ 38.958446] ? get_unmapped_area+0x1f5/0x3f0 [ 38.958998] do_mmap+0x854/0xf00 [ 38.959478] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.959967] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.960531] ksys_mmap_pgoff+0x3af/0x500 [ 38.961041] do_syscall_64+0x3f/0x90 [ 38.961514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.962155] RIP: 0033:0x7f6422527d82 [ 38.962617] 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 [ 38.964798] RSP: 002b:00007fff125b6668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.965716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6422527d82 [ 38.966554] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6421961000 [ 38.967447] RBP: 00007f6421961000 R08: 0000000000000009 R09: 0000000000001000 [ 38.968304] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0234ffec0 [ 38.969159] R13: 00007fff125b6680 R14: 00007fff125b66b0 R15: 00007fff125b6a10 [ 38.970030] [ 38.970325] [ 38.970544] Allocated by task 220: [ 38.970978] kasan_save_stack+0x22/0x50 [ 38.971526] kasan_set_track+0x25/0x30 [ 38.972024] __kasan_slab_alloc+0x59/0x70 [ 38.972538] kmem_cache_alloc+0x16b/0x370 [ 38.973044] vm_area_dup+0x20/0x160 [ 38.973493] __split_vma+0x170/0x950 [ 38.973975] split_vma+0xc6/0x110 [ 38.974409] mprotect_fixup+0x8d2/0xb30 [ 38.974905] do_mprotect_pkey+0x87e/0xd40 [ 38.975471] __x64_sys_mprotect+0x78/0xc0 [ 38.975999] do_syscall_64+0x3f/0x90 [ 38.976478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.977115] [ 38.977333] Freed by task 19: [ 38.977719] kasan_save_stack+0x22/0x50 [ 38.978249] kasan_set_track+0x25/0x30 [ 38.978735] kasan_save_free_info+0x2b/0x50 [ 38.979282] __kasan_slab_free+0x10a/0x190 [ 38.979848] kmem_cache_free+0x10d/0x4d0 [ 38.980361] rcu_core+0x8c8/0x2860 [ 38.980809] __do_softirq+0x1b7/0x7d4 [ 38.981296] [ 38.981511] Last potentially related work creation: [ 38.982118] kasan_save_stack+0x22/0x50 [ 38.982628] __kasan_record_aux_stack+0x8e/0xa0 [ 38.983210] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.983910] remove_vma+0x139/0x170 [ 38.984372] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.984940] do_vmi_munmap+0x1f1/0x2b0 [ 38.985440] __vm_munmap+0x138/0x3a0 [ 38.985913] __x64_sys_munmap+0x59/0x80 [ 38.986425] do_syscall_64+0x3f/0x90 [ 38.986898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.987587] [ 38.987803] The buggy address belongs to the object at ffff888019d0dcb0 [ 38.987803] which belongs to the cache vm_area_struct of size 168 [ 38.989285] The buggy address is located 88 bytes inside of [ 38.989285] freed 168-byte region [ffff888019d0dcb0, ffff888019d0dd58) [ 38.990728] [ 38.990946] The buggy address belongs to the physical page: [ 38.991666] page:000000000b3842e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d0d [ 38.992767] memcg:ffff888016e8b901 [ 38.993204] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.993859] page_type: 0xffffffff() [ 38.994334] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.995239] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e8b901 [ 38.996204] page dumped because: kasan: bad access detected [ 38.996880] [ 38.997094] Memory state around the buggy address: [ 38.997680] ffff888019d0dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.998556] ffff888019d0dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.999456] >ffff888019d0dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.000309] ^ [ 39.000748] ffff888019d0dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.001609] ffff888019d0de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.002481] ================================================================== [ 39.003485] Disabling lock debugging due to kernel taint [ 40.982185] BUG: Bad rss-counter state mm:00000000e35a9c3c type:MM_FILEPAGES val:33 [ 40.983420] BUG: Bad rss-counter state mm:00000000e35a9c3c type:MM_ANONPAGES val:22 [ 41.481593] BUG: Bad rss-counter state mm:000000002636e65c type:MM_FILEPAGES val:33 [ 41.482603] BUG: Bad rss-counter state mm:000000002636e65c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25695' (ECDSA) to the list of known hosts. 2023/06/21 02:45:08 fuzzer started 2023/06/21 02:45:08 dialing manager at localhost:36067 2023/06/21 02:45:08 checking machine... 2023/06/21 02:45:08 checking revisions... [ 42.230898] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:45:08 testing simple program... [ 42.279488] cgroup: Unknown subsys name 'net' [ 42.340681] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:45:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81a58524 RDX=000000000000a585 RSI=000000000000a585 RDI=ffffffff86513004 RBP=ffff8880102b7480 RSP=ffff8880102b73b8 R8 =0000000000000000 R9 =ffff8880102b7468 R10=0000000000038001 R11=0000000000029d8d R12=ffff8880102b7488 R13=ffff8880102b7470 R14=ffff8880102b7469 R15=ffff8880102b7428 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007f7d33a4c900 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=0000561cd4393768 CR3=000000000cc64000 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=25252525252525252525252525252525 XMM01=0000000000ff000000000000000000ff XMM02=0000000000ff000000000000000000ff XMM03=000000000011bf18ec2efd57dc4c00df XMM04=c31864c7bf445b7400000000000ae988 XMM05=ceaad7a4308560d40000000000132e38 XMM06=16bbfc4fa606b6250000000000131c10 XMM07=fb795ef6d65770560000000000122120 XMM08=636f72702f0064696e6f697373657300 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015d11b40 RSI=ffffffff817650e5 RDI=0000000000000007 RBP=ffffea000074f200 RSP=ffff88800dd37910 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea000074f200 R13=ffff888016b060e8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c086b 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 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=000055823e5e6040 CR3=000000000eeb0000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=5f65676e61686378655f78656b203a72 XMM04=000000300000002800007f48e7160b6b XMM05=00007ffe0a1a1ac000007ffe0a1a1b80 XMM06=00000000000000020c035b488d60e300 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=f1ae70f3b593b355508c0132662801da XMM11=f6b565626617696be7722f5ac2ba5a70 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000