syzkaller login: [ 28.694399] BUG: Bad rss-counter state mm:0000000074f77252 type:MM_FILEPAGES val:33 [ 28.695100] BUG: Bad rss-counter state mm:0000000074f77252 type:MM_ANONPAGES val:22 [ 28.834945] ================================================================== [ 28.835893] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.836884] Read of size 8 at addr ffff888019b33058 by task sshd/220 [ 28.837779] [ 28.838005] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.838888] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.839898] Call Trace: [ 28.840252] [ 28.840537] dump_stack_lvl+0x91/0xf0 [ 28.841037] print_report+0xcc/0x620 [ 28.841537] ? __virt_addr_valid+0x102/0x340 [ 28.842099] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.842738] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.843374] kasan_report+0xbe/0xf0 [ 28.843862] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.844513] vma_interval_tree_remove+0xc75/0xec0 [ 28.845124] vma_prepare+0xc54/0x11a0 [ 28.845608] __split_vma+0x5af/0x950 [ 28.846095] ? __pfx___split_vma+0x10/0x10 [ 28.846638] ? find_held_lock+0x2c/0x110 [ 28.847173] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.847744] ? lock_is_held_type+0x9f/0x120 [ 28.848306] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.848917] ? mtree_range_walk+0x632/0x900 [ 28.849485] ? mas_walk+0x5c7/0x7c0 [ 28.849964] do_vmi_munmap+0x1f1/0x2b0 [ 28.850464] mmap_region+0x1f9/0x2660 [ 28.850950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.851463] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.852199] ? __pfx_lock_acquire+0x10/0x10 [ 28.852736] ? __pfx_mmap_region+0x10/0x10 [ 28.853267] ? security_mmap_addr+0x7d/0xa0 [ 28.853797] ? get_unmapped_area+0x1f5/0x3f0 [ 28.854352] do_mmap+0x854/0xf00 [ 28.854795] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.855303] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.855880] ksys_mmap_pgoff+0x3af/0x500 [ 28.856410] do_syscall_64+0x3f/0x90 [ 28.856906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.857568] RIP: 0033:0x7fca8ca58d82 [ 28.858039] 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 [ 28.860260] RSP: 002b:00007ffe500fc6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.861191] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca8ca58d82 [ 28.862059] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca8be92000 [ 28.862946] RBP: 00007fca8be92000 R08: 0000000000000009 R09: 0000000000001000 [ 28.863821] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e07754f70 [ 28.864683] R13: 00007ffe500fc710 R14: 00007ffe500fc740 R15: 00007ffe500fcaa0 [ 28.865540] [ 28.865835] [ 28.866054] Allocated by task 212: [ 28.866489] kasan_save_stack+0x22/0x50 [ 28.866998] kasan_set_track+0x25/0x30 [ 28.867504] __kasan_slab_alloc+0x59/0x70 [ 28.868028] kmem_cache_alloc+0x16b/0x370 [ 28.868560] vm_area_dup+0x20/0x160 [ 28.869019] __split_vma+0x170/0x950 [ 28.869495] split_vma+0xc6/0x110 [ 28.869946] mprotect_fixup+0x8d2/0xb30 [ 28.870449] do_mprotect_pkey+0x87e/0xd40 [ 28.870971] __x64_sys_mprotect+0x78/0xc0 [ 28.871493] do_syscall_64+0x3f/0x90 [ 28.871972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.872639] [ 28.872859] Freed by task 212: [ 28.873252] kasan_save_stack+0x22/0x50 [ 28.873757] kasan_set_track+0x25/0x30 [ 28.874253] kasan_save_free_info+0x2b/0x50 [ 28.874786] __kasan_slab_free+0x10a/0x190 [ 28.875319] kmem_cache_free+0x10d/0x4d0 [ 28.875833] rcu_core+0x8c8/0x2860 [ 28.876285] __do_softirq+0x1b7/0x7d4 [ 28.876765] [ 28.876979] Last potentially related work creation: [ 28.877571] kasan_save_stack+0x22/0x50 [ 28.878075] __kasan_record_aux_stack+0x8e/0xa0 [ 28.878649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.879295] remove_vma+0x139/0x170 [ 28.879758] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.880331] do_vmi_munmap+0x1f1/0x2b0 [ 28.880818] __vm_munmap+0x138/0x3a0 [ 28.881289] __x64_sys_munmap+0x59/0x80 [ 28.881793] do_syscall_64+0x3f/0x90 [ 28.882278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.882922] [ 28.883136] The buggy address belongs to the object at ffff888019b33000 [ 28.883136] which belongs to the cache vm_area_struct of size 168 [ 28.884639] The buggy address is located 88 bytes inside of [ 28.884639] freed 168-byte region [ffff888019b33000, ffff888019b330a8) [ 28.886042] [ 28.886257] The buggy address belongs to the physical page: [ 28.886917] page:00000000c71774a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b33 [ 28.888012] memcg:ffff888010032201 [ 28.888462] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.889110] page_type: 0xffffffff() [ 28.889568] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.890487] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010032201 [ 28.891397] page dumped because: kasan: bad access detected [ 28.892058] [ 28.892302] Memory state around the buggy address: [ 28.892890] ffff888019b32f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 28.893745] ffff888019b32f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.894601] >ffff888019b33000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.895461] ^ [ 28.896198] ffff888019b33080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.897059] ffff888019b33100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.897933] ================================================================== [ 28.899361] Disabling lock debugging due to kernel taint [ 30.863437] BUG: Bad rss-counter state mm:00000000eeac70c5 type:MM_FILEPAGES val:33 [ 30.864681] BUG: Bad rss-counter state mm:00000000eeac70c5 type:MM_ANONPAGES val:22 [ 31.327825] BUG: Bad rss-counter state mm:000000009951017b type:MM_FILEPAGES val:33 [ 31.329673] BUG: Bad rss-counter state mm:000000009951017b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19000' (ECDSA) to the list of known hosts. 2023/06/20 23:01:56 fuzzer started 2023/06/20 23:01:56 dialing manager at localhost:36067 2023/06/20 23:01:56 checking machine... 2023/06/20 23:01:56 checking revisions... [ 31.935806] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:01:56 testing simple program... [ 31.981422] cgroup: Unknown subsys name 'net' [ 32.025385] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:01:56 Registers: info registers vcpu 0 RAX=000000000000000b RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bbb58 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88801693ff58 R15=ffff88806ce09a98 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 00007f79807b3900 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=00007f7980d6a618 CR3=000000000f6a0000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f447061dfb0 CR3=000000000dcd8000 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=2036353a31303a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a31303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000