syzkaller login: [ 31.410959] BUG: Bad rss-counter state mm:0000000066d93eb7 type:MM_FILEPAGES val:33 [ 31.411488] BUG: Bad rss-counter state mm:0000000066d93eb7 type:MM_ANONPAGES val:22 [ 31.522505] ================================================================== [ 31.523627] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.524936] Read of size 8 at addr ffff888015b8ddf0 by task sshd/220 [ 31.525720] [ 31.525898] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.526550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.527308] Call Trace: [ 31.527553] <TASK> [ 31.527784] dump_stack_lvl+0x91/0xf0 [ 31.528170] print_report+0xcc/0x620 [ 31.528538] ? __virt_addr_valid+0x102/0x340 [ 31.528979] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.529447] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.529924] kasan_report+0xbe/0xf0 [ 31.530282] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.530758] vma_interval_tree_remove+0xc75/0xec0 [ 31.531220] vma_prepare+0xc54/0x11a0 [ 31.531583] __split_vma+0x5af/0x950 [ 31.531969] ? __pfx___split_vma+0x10/0x10 [ 31.532369] ? find_held_lock+0x2c/0x110 [ 31.532788] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.533224] ? lock_is_held_type+0x9f/0x120 [ 31.533635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.534120] ? mtree_range_walk+0x632/0x900 [ 31.534548] ? mas_walk+0x5c7/0x7c0 [ 31.534923] do_vmi_munmap+0x1f1/0x2b0 [ 31.535300] mmap_region+0x1f9/0x2660 [ 31.535668] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.536092] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.536648] ? __pfx_lock_acquire+0x10/0x10 [ 31.537038] ? __pfx_mmap_region+0x10/0x10 [ 31.537339] ? security_mmap_addr+0x7d/0xa0 [ 31.537646] ? get_unmapped_area+0x1f5/0x3f0 [ 31.537986] do_mmap+0x854/0xf00 [ 31.538237] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.538517] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.538845] ksys_mmap_pgoff+0x3af/0x500 [ 31.539140] do_syscall_64+0x3f/0x90 [ 31.539416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.539802] RIP: 0033:0x7f7842f3ed82 [ 31.540072] 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 [ 31.541328] RSP: 002b:00007ffc58a69538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.541862] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7842f3ed82 [ 31.542354] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7842378000 [ 31.542853] RBP: 00007f7842378000 R08: 0000000000000009 R09: 0000000000001000 [ 31.543343] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606180b5ec0 [ 31.543845] R13: 00007ffc58a69550 R14: 00007ffc58a69580 R15: 00007ffc58a698e0 [ 31.544380] </TASK> [ 31.544546] [ 31.544672] Allocated by task 213: [ 31.544935] kasan_save_stack+0x22/0x50 [ 31.545235] kasan_set_track+0x25/0x30 [ 31.545517] __kasan_slab_alloc+0x59/0x70 [ 31.545825] kmem_cache_alloc+0x16b/0x370 [ 31.546113] vm_area_dup+0x20/0x160 [ 31.546372] __split_vma+0x170/0x950 [ 31.546633] split_vma+0xc6/0x110 [ 31.546892] mprotect_fixup+0x8d2/0xb30 [ 31.547187] do_mprotect_pkey+0x87e/0xd40 [ 31.547489] __x64_sys_mprotect+0x78/0xc0 [ 31.547799] do_syscall_64+0x3f/0x90 [ 31.548085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.548457] [ 31.548585] Freed by task 213: [ 31.548825] kasan_save_stack+0x22/0x50 [ 31.549119] kasan_set_track+0x25/0x30 [ 31.549406] kasan_save_free_info+0x2b/0x50 [ 31.549718] __kasan_slab_free+0x10a/0x190 [ 31.550036] kmem_cache_free+0x10d/0x4d0 [ 31.550326] rcu_core+0x8c8/0x2860 [ 31.550580] __do_softirq+0x1b7/0x7d4 [ 31.550864] [ 31.550989] Last potentially related work creation: [ 31.551332] kasan_save_stack+0x22/0x50 [ 31.551629] __kasan_record_aux_stack+0x8e/0xa0 [ 31.551975] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.552345] remove_vma+0x139/0x170 [ 31.552602] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.552939] do_vmi_munmap+0x1f1/0x2b0 [ 31.553224] __vm_munmap+0x138/0x3a0 [ 31.553495] __x64_sys_munmap+0x59/0x80 [ 31.553789] do_syscall_64+0x3f/0x90 [ 31.554063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.554438] [ 31.554563] Second to last potentially related work creation: [ 31.554959] kasan_save_stack+0x22/0x50 [ 31.555248] __kasan_record_aux_stack+0x8e/0xa0 [ 31.555583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.555969] remove_vma+0x139/0x170 [ 31.556229] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.556553] do_vmi_munmap+0x1f1/0x2b0 [ 31.556847] mmap_region+0x1f9/0x2660 [ 31.557125] do_mmap+0x854/0xf00 [ 31.557377] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.557654] ksys_mmap_pgoff+0x7d/0x500 [ 31.557947] do_syscall_64+0x3f/0x90 [ 31.558221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.558593] [ 31.558722] The buggy address belongs to the object at ffff888015b8dd98 [ 31.558722] which belongs to the cache vm_area_struct of size 168 [ 31.559585] The buggy address is located 88 bytes inside of [ 31.559585] freed 168-byte region [ffff888015b8dd98, ffff888015b8de40) [ 31.560424] [ 31.560548] The buggy address belongs to the physical page: [ 31.560945] page:00000000c95dce5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b8d [ 31.561563] memcg:ffff88801605f301 [ 31.561816] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.562189] page_type: 0xffffffff() [ 31.562458] raw: 0100000000000200 ffff8880087a0c80 ffffea000051df00 dead000000000008 [ 31.563001] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801605f301 [ 31.563530] page dumped because: kasan: bad access detected [ 31.563927] [ 31.564058] Memory state around the buggy address: [ 31.564392] ffff888015b8dc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.564895] ffff888015b8dd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.565388] >ffff888015b8dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.565880] ^ [ 31.566337] ffff888015b8de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.566840] ffff888015b8de80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.567336] ================================================================== [ 31.567992] Disabling lock debugging due to kernel taint [ 33.064031] BUG: Bad rss-counter state mm:0000000057dbeb88 type:MM_FILEPAGES val:33 [ 33.064799] BUG: Bad rss-counter state mm:0000000057dbeb88 type:MM_ANONPAGES val:22 [ 33.486446] BUG: Bad rss-counter state mm:000000007a620b22 type:MM_FILEPAGES val:33 [ 33.487222] BUG: Bad rss-counter state mm:000000007a620b22 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50004' (ECDSA) to the list of known hosts. 2023/06/20 11:15:16 fuzzer started 2023/06/20 11:15:16 dialing manager at localhost:36067 2023/06/20 11:15:17 checking machine... 2023/06/20 11:15:17 checking revisions... [ 34.182338] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:15:17 testing simple program... [ 34.230339] cgroup: Unknown subsys name 'net' [ 34.283613] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:15:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000100 RCX=0000000000000000 RDX=1ffff11002d1acc1 RSI=ffffffff8164ffa2 RDI=ffff8880168d6608 RBP=ffff88806ce35018 RSP=ffff888019b9fa78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=00000000000000cf R14=ffff888010288000 R15=ffff8880168d51c0 RIP=ffffffff8164fff0 RFL=00000246 [---Z-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 00007fcd5f870700 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=00007fba03a280b0 CR3=000000001827e000 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=2036313a35313a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a35313a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff860a1440 RDX=1ffff1100d9e1354 RSI=1ffff1100d9e1353 RDI=1ffff1100d9e1353 RBP=ffff88806cf09a98 RSP=ffff88806cf099d0 R8 =ffffffff860a1444 R9 =ffff88806cf09a80 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09aa0 R13=ffff88806cf09a88 R14=ffff88806cf09ff8 R15=ffff88806cf09a40 RIP=ffffffff811310ce RFL=00000246 [---Z-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 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=00007fa33e3a52b0 CR3=000000000c788000 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=c344b8a01131ae9937480a027fd2e03d XMM02=2c67c8bc2e329bc3000000000011d380 XMM03=fb795ef6d65770560000000000121a48 XMM04=90e28c076854c11000000000000ae988 XMM05=19e9129bd510f2350000000000132ba8 XMM06=cfcc633bb3ac41210000000000131a10 XMM07=e042d86d42eb936e0000000000121cc8 XMM08=34e39c4cb632d547000000000011d3e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000