syzkaller login: [ 30.864772] BUG: Bad rss-counter state mm:0000000034751a41 type:MM_FILEPAGES val:33 [ 30.866345] BUG: Bad rss-counter state mm:0000000034751a41 type:MM_ANONPAGES val:22 [ 31.022191] ================================================================== [ 31.023418] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.024752] Read of size 8 at addr ffff88801a13a140 by task sshd/220 [ 31.025628] [ 31.025883] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.026853] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.027893] Call Trace: [ 31.028244] [ 31.028543] dump_stack_lvl+0x91/0xf0 [ 31.029084] print_report+0xcc/0x620 [ 31.029595] ? __virt_addr_valid+0x102/0x340 [ 31.030204] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.030853] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.031531] kasan_report+0xbe/0xf0 [ 31.032079] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.032757] vma_interval_tree_remove+0xc75/0xec0 [ 31.033472] vma_prepare+0xc54/0x11a0 [ 31.034050] __split_vma+0x5af/0x950 [ 31.034571] ? __pfx___split_vma+0x10/0x10 [ 31.035165] ? find_held_lock+0x2c/0x110 [ 31.035746] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.036411] ? lock_is_held_type+0x9f/0x120 [ 31.037022] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.037680] ? mtree_range_walk+0x632/0x900 [ 31.038315] ? mas_walk+0x5c7/0x7c0 [ 31.038843] do_vmi_munmap+0x1f1/0x2b0 [ 31.039453] mmap_region+0x1f9/0x2660 [ 31.040012] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.040576] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.041350] ? __pfx_lock_acquire+0x10/0x10 [ 31.041960] ? __pfx_mmap_region+0x10/0x10 [ 31.042545] ? security_mmap_addr+0x7d/0xa0 [ 31.043129] ? get_unmapped_area+0x1f5/0x3f0 [ 31.043724] do_mmap+0x854/0xf00 [ 31.044232] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.044773] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.045394] ksys_mmap_pgoff+0x3af/0x500 [ 31.045965] do_syscall_64+0x3f/0x90 [ 31.046491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.047202] RIP: 0033:0x7fbe8680ed82 [ 31.047699] 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 [ 31.050027] RSP: 002b:00007ffc0c275a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.051007] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe8680ed82 [ 31.051923] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe85c48000 [ 31.052856] RBP: 00007fbe85c48000 R08: 0000000000000009 R09: 0000000000001000 [ 31.053780] R10: 0000000000000812 R11: 0000000000000206 R12: 000056439dda9ec0 [ 31.054725] R13: 00007ffc0c275ab0 R14: 00007ffc0c275ae0 R15: 00007ffc0c275e40 [ 31.055652] [ 31.055975] [ 31.056218] Allocated by task 213: [ 31.056678] kasan_save_stack+0x22/0x50 [ 31.057231] kasan_set_track+0x25/0x30 [ 31.057760] __kasan_slab_alloc+0x59/0x70 [ 31.058352] kmem_cache_alloc+0x16b/0x370 [ 31.058905] vm_area_dup+0x20/0x160 [ 31.059408] __split_vma+0x170/0x950 [ 31.059909] split_vma+0xc6/0x110 [ 31.060403] mprotect_fixup+0x8d2/0xb30 [ 31.060942] do_mprotect_pkey+0x87e/0xd40 [ 31.061515] __x64_sys_mprotect+0x78/0xc0 [ 31.062092] do_syscall_64+0x3f/0x90 [ 31.062601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.063300] [ 31.063530] Freed by task 213: [ 31.063951] kasan_save_stack+0x22/0x50 [ 31.064517] kasan_set_track+0x25/0x30 [ 31.065142] kasan_save_free_info+0x2b/0x50 [ 31.065708] __kasan_slab_free+0x10a/0x190 [ 31.066299] kmem_cache_free+0x10d/0x4d0 [ 31.066838] rcu_core+0x8c8/0x2860 [ 31.067319] __do_softirq+0x1b7/0x7d4 [ 31.067827] [ 31.068077] Last potentially related work creation: [ 31.068701] kasan_save_stack+0x22/0x50 [ 31.069251] __kasan_record_aux_stack+0x8e/0xa0 [ 31.069872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.070575] remove_vma+0x139/0x170 [ 31.071067] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.071662] do_vmi_munmap+0x1f1/0x2b0 [ 31.072194] __vm_munmap+0x138/0x3a0 [ 31.072693] __x64_sys_munmap+0x59/0x80 [ 31.073228] do_syscall_64+0x3f/0x90 [ 31.073728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.074447] [ 31.074677] The buggy address belongs to the object at ffff88801a13a0e8 [ 31.074677] which belongs to the cache vm_area_struct of size 168 [ 31.076246] The buggy address is located 88 bytes inside of [ 31.076246] freed 168-byte region [ffff88801a13a0e8, ffff88801a13a190) [ 31.077734] [ 31.077985] The buggy address belongs to the physical page: [ 31.078680] page:00000000dc2a0754 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a13a [ 31.079850] memcg:ffff888016542801 [ 31.080328] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.081023] page_type: 0xffffffff() [ 31.081499] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.082497] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016542801 [ 31.083455] page dumped because: kasan: bad access detected [ 31.084172] [ 31.084401] Memory state around the buggy address: [ 31.085025] ffff88801a13a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.085969] ffff88801a13a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.086889] >ffff88801a13a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.087801] ^ [ 31.088501] ffff88801a13a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.089417] ffff88801a13a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.090335] ================================================================== [ 31.091429] Disabling lock debugging due to kernel taint [ 33.345641] BUG: Bad rss-counter state mm:00000000d78aa2e6 type:MM_FILEPAGES val:33 [ 33.347133] BUG: Bad rss-counter state mm:00000000d78aa2e6 type:MM_ANONPAGES val:22 [ 33.780328] BUG: Bad rss-counter state mm:0000000085fc4606 type:MM_FILEPAGES val:33 [ 33.781678] BUG: Bad rss-counter state mm:0000000085fc4606 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64393' (ECDSA) to the list of known hosts. 2023/06/20 10:38:42 fuzzer started 2023/06/20 10:38:42 dialing manager at localhost:44161 2023/06/20 10:38:42 checking machine... 2023/06/20 10:38:42 checking revisions... [ 34.445280] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:38:42 testing simple program... [ 34.476111] cgroup: Unknown subsys name 'net' [ 34.525838] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:38:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f525b12d970 CR3=0000000015c94000 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=2032343a38333a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a38333a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1002cdcdf6 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015f89b40 RSI=ffffffff814c84f5 RDI=ffffffff8560b640 RBP=1ffff11002cdcdf6 RSP=ffff8880166e6fa0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff88801a27d5f0 RIP=ffffffff812d8660 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 00007f836fe2a900 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=00007f836fde3008 CR3=000000000970e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000