syzkaller login: [ 43.172149] BUG: Bad rss-counter state mm:000000009304adbc type:MM_FILEPAGES val:33 [ 43.173171] BUG: Bad rss-counter state mm:000000009304adbc type:MM_ANONPAGES val:22 [ 43.299586] ================================================================== [ 43.300310] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.301006] Read of size 8 at addr ffff88801432d058 by task sshd/221 [ 43.301576] [ 43.301739] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.302377] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.303097] Call Trace: [ 43.303329] [ 43.303539] dump_stack_lvl+0x91/0xf0 [ 43.304110] print_report+0xcc/0x620 [ 43.304469] ? __virt_addr_valid+0x102/0x340 [ 43.304868] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.305321] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.305769] kasan_report+0xbe/0xf0 [ 43.306131] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.306584] vma_interval_tree_remove+0xc75/0xec0 [ 43.307053] vma_prepare+0xc54/0x11a0 [ 43.307406] __split_vma+0x5af/0x950 [ 43.307752] ? __pfx___split_vma+0x10/0x10 [ 43.308136] ? find_held_lock+0x2c/0x110 [ 43.308517] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.308931] ? lock_is_held_type+0x9f/0x120 [ 43.309332] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.309773] ? mtree_range_walk+0x632/0x900 [ 43.310168] ? mas_walk+0x5c7/0x7c0 [ 43.310509] do_vmi_munmap+0x1f1/0x2b0 [ 43.310888] mmap_region+0x1f9/0x2660 [ 43.311265] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.311655] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.312197] ? __pfx_lock_acquire+0x10/0x10 [ 43.312590] ? __pfx_mmap_region+0x10/0x10 [ 43.312969] ? security_mmap_addr+0x7d/0xa0 [ 43.313363] ? get_unmapped_area+0x1f5/0x3f0 [ 43.313770] do_mmap+0x854/0xf00 [ 43.314088] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.314450] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.314878] ksys_mmap_pgoff+0x3af/0x500 [ 43.315248] do_syscall_64+0x3f/0x90 [ 43.315607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.316077] RIP: 0033:0x7fcf1d771d82 [ 43.316409] 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 [ 43.317981] RSP: 002b:00007ffe29f0f908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.318653] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf1d771d82 [ 43.319355] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf1cbab000 [ 43.319982] RBP: 00007fcf1cbab000 R08: 0000000000000009 R09: 0000000000001000 [ 43.320618] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b2a7d2ec0 [ 43.321246] R13: 00007ffe29f0f920 R14: 00007ffe29f0f950 R15: 00007ffe29f0fcb0 [ 43.321900] [ 43.322112] [ 43.322268] Allocated by task 214: [ 43.322584] kasan_save_stack+0x22/0x50 [ 43.323004] kasan_set_track+0x25/0x30 [ 43.323370] __kasan_slab_alloc+0x59/0x70 [ 43.323760] kmem_cache_alloc+0x16b/0x370 [ 43.324144] vm_area_dup+0x20/0x160 [ 43.324491] __split_vma+0x170/0x950 [ 43.324854] split_vma+0xc6/0x110 [ 43.325187] mprotect_fixup+0x8d2/0xb30 [ 43.325561] do_mprotect_pkey+0x87e/0xd40 [ 43.325952] __x64_sys_mprotect+0x78/0xc0 [ 43.326338] do_syscall_64+0x3f/0x90 [ 43.326689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.327197] [ 43.327354] Freed by task 214: [ 43.327652] kasan_save_stack+0x22/0x50 [ 43.328025] kasan_set_track+0x25/0x30 [ 43.328411] kasan_save_free_info+0x2b/0x50 [ 43.328805] __kasan_slab_free+0x10a/0x190 [ 43.329185] kmem_cache_free+0x10d/0x4d0 [ 43.329551] rcu_core+0x8c8/0x2860 [ 43.329880] __do_softirq+0x1b7/0x7d4 [ 43.330229] [ 43.330387] Last potentially related work creation: [ 43.330824] kasan_save_stack+0x22/0x50 [ 43.331249] __kasan_record_aux_stack+0x8e/0xa0 [ 43.331668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.332145] remove_vma+0x139/0x170 [ 43.332478] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.332893] do_vmi_munmap+0x1f1/0x2b0 [ 43.333242] __vm_munmap+0x138/0x3a0 [ 43.333589] __x64_sys_munmap+0x59/0x80 [ 43.333963] do_syscall_64+0x3f/0x90 [ 43.334308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.334794] [ 43.334977] The buggy address belongs to the object at ffff88801432d000 [ 43.334977] which belongs to the cache vm_area_struct of size 168 [ 43.336068] The buggy address is located 88 bytes inside of [ 43.336068] freed 168-byte region [ffff88801432d000, ffff88801432d0a8) [ 43.337127] [ 43.337290] The buggy address belongs to the physical page: [ 43.337751] page:000000008d1f1fc5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1432d [ 43.338560] memcg:ffff88801432e001 [ 43.338895] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.339375] page_type: 0xffffffff() [ 43.339721] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.340424] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801432e001 [ 43.341093] page dumped because: kasan: bad access detected [ 43.341589] [ 43.341747] Memory state around the buggy address: [ 43.342178] ffff88801432cf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 43.342808] ffff88801432cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 43.343489] >ffff88801432d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.344127] ^ [ 43.344822] ffff88801432d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 43.345458] ffff88801432d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.346080] ================================================================== [ 43.346801] Disabling lock debugging due to kernel taint [ 44.980792] BUG: Bad rss-counter state mm:00000000cd08b762 type:MM_FILEPAGES val:33 [ 44.981503] BUG: Bad rss-counter state mm:00000000cd08b762 type:MM_ANONPAGES val:22 [ 45.349136] BUG: Bad rss-counter state mm:00000000097c3bc3 type:MM_FILEPAGES val:33 [ 45.349879] BUG: Bad rss-counter state mm:00000000097c3bc3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10189' (ECDSA) to the list of known hosts. 2023/06/20 09:08:31 fuzzer started 2023/06/20 09:08:31 dialing manager at localhost:44161 2023/06/20 09:08:31 checking machine... 2023/06/20 09:08:31 checking revisions... [ 45.941151] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:08:31 testing simple program... [ 45.982248] cgroup: Unknown subsys name 'net' [ 46.013940] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:08:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016314d90 RCX=ffffffff81370c61 RDX=1ffff1100d9c6a00 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000200 RSP=ffff88806ce09dc0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88806ce35000 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff8137111b RFL=00000016 [----AP-] 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 00007f4abf9c3900 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=00007f4abff7a618 CR3=000000000ca52000 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=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=00007fb1742bbb30 CR3=0000000010124000 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=9d5ba506f1ad56937441bc4a34cd5335 XMM02=000000000011ccd0eff9b2d0a8fce9cb XMM03=000000000011cda02c67c8bc2e329bc3 XMM04=37bd2423e50eab4700000000000ae988 XMM05=e4cb8bb95a7664b60000000000133de8 XMM06=c291bd5c70af25b90000000000133c70 XMM07=e042d86d42eb936e0000000000124190 XMM08=d0e3fee0df04f6cd000000000011cda0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000