syzkaller login: [ 34.312385] BUG: Bad rss-counter state mm:000000001ad9b4e8 type:MM_FILEPAGES val:33 [ 34.313378] BUG: Bad rss-counter state mm:000000001ad9b4e8 type:MM_ANONPAGES val:22 [ 34.471296] ================================================================== [ 34.472197] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.473125] Read of size 8 at addr ffff88800e1fdc20 by task sshd/220 [ 34.474010] [ 34.474225] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.475087] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.476086] Call Trace: [ 34.476406] [ 34.476691] dump_stack_lvl+0x91/0xf0 [ 34.477176] print_report+0xcc/0x620 [ 34.477663] ? __virt_addr_valid+0x102/0x340 [ 34.478222] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.478864] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.479486] kasan_report+0xbe/0xf0 [ 34.479970] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.480628] vma_interval_tree_remove+0xc75/0xec0 [ 34.481254] vma_prepare+0xc54/0x11a0 [ 34.481751] __split_vma+0x5af/0x950 [ 34.482248] ? __pfx___split_vma+0x10/0x10 [ 34.482821] ? find_held_lock+0x2c/0x110 [ 34.483361] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.483972] ? lock_is_held_type+0x9f/0x120 [ 34.484517] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.485131] ? mtree_range_walk+0x632/0x900 [ 34.485677] ? mas_walk+0x5c7/0x7c0 [ 34.486145] do_vmi_munmap+0x1f1/0x2b0 [ 34.486655] mmap_region+0x1f9/0x2660 [ 34.487144] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.487655] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.488371] ? __pfx_lock_acquire+0x10/0x10 [ 34.488907] ? __pfx_mmap_region+0x10/0x10 [ 34.489470] ? security_mmap_addr+0x7d/0xa0 [ 34.490026] ? get_unmapped_area+0x1f5/0x3f0 [ 34.490619] do_mmap+0x854/0xf00 [ 34.491066] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.491570] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.492134] ksys_mmap_pgoff+0x3af/0x500 [ 34.492649] do_syscall_64+0x3f/0x90 [ 34.493126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.493793] RIP: 0033:0x7ffa9a980d82 [ 34.494259] 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 [ 34.496407] RSP: 002b:00007ffef9697458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.497333] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa9a980d82 [ 34.498219] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa99dba000 [ 34.499119] RBP: 00007ffa99dba000 R08: 0000000000000009 R09: 0000000000001000 [ 34.500016] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c2d17cb20 [ 34.500911] R13: 00007ffef9697470 R14: 00007ffef96974a0 R15: 00007ffef9697800 [ 34.501826] [ 34.502138] [ 34.502365] Allocated by task 213: [ 34.502833] kasan_save_stack+0x22/0x50 [ 34.503371] kasan_set_track+0x25/0x30 [ 34.503888] __kasan_slab_alloc+0x59/0x70 [ 34.504447] kmem_cache_alloc+0x16b/0x370 [ 34.505002] vm_area_dup+0x20/0x160 [ 34.505483] __split_vma+0x170/0x950 [ 34.505978] split_vma+0xc6/0x110 [ 34.506448] mprotect_fixup+0x8d2/0xb30 [ 34.506987] do_mprotect_pkey+0x87e/0xd40 [ 34.507543] __x64_sys_mprotect+0x78/0xc0 [ 34.508100] do_syscall_64+0x3f/0x90 [ 34.508596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.509270] [ 34.509498] Freed by task 202: [ 34.509918] kasan_save_stack+0x22/0x50 [ 34.510443] kasan_set_track+0x25/0x30 [ 34.510978] kasan_save_free_info+0x2b/0x50 [ 34.511542] __kasan_slab_free+0x10a/0x190 [ 34.512109] kmem_cache_free+0x10d/0x4d0 [ 34.512654] rcu_core+0x8c8/0x2860 [ 34.513120] __do_softirq+0x1b7/0x7d4 [ 34.513624] [ 34.513847] Last potentially related work creation: [ 34.514467] kasan_save_stack+0x22/0x50 [ 34.515013] __kasan_record_aux_stack+0x8e/0xa0 [ 34.515616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.516296] remove_vma+0x139/0x170 [ 34.516778] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.517364] do_vmi_munmap+0x1f1/0x2b0 [ 34.517873] __vm_munmap+0x138/0x3a0 [ 34.518374] __x64_sys_munmap+0x59/0x80 [ 34.518914] do_syscall_64+0x3f/0x90 [ 34.519415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.520090] [ 34.520319] Second to last potentially related work creation: [ 34.521046] kasan_save_stack+0x22/0x50 [ 34.521572] __kasan_record_aux_stack+0x8e/0xa0 [ 34.522181] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.522868] remove_vma+0x139/0x170 [ 34.523339] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.523930] do_vmi_munmap+0x1f1/0x2b0 [ 34.524446] mmap_region+0x1f9/0x2660 [ 34.524946] do_mmap+0x854/0xf00 [ 34.525409] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.525919] ksys_mmap_pgoff+0x3af/0x500 [ 34.526454] do_syscall_64+0x3f/0x90 [ 34.526972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.527662] [ 34.527890] The buggy address belongs to the object at ffff88800e1fdbc8 [ 34.527890] which belongs to the cache vm_area_struct of size 168 [ 34.529464] The buggy address is located 88 bytes inside of [ 34.529464] freed 168-byte region [ffff88800e1fdbc8, ffff88800e1fdc70) [ 34.530970] [ 34.531192] The buggy address belongs to the physical page: [ 34.531895] page:000000002bb8a1d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1fd [ 34.533053] memcg:ffff88800dac6d01 [ 34.533507] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.534253] page_type: 0xffffffff() [ 34.534742] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 34.535724] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dac6d01 [ 34.536689] page dumped because: kasan: bad access detected [ 34.537382] [ 34.537608] Memory state around the buggy address: [ 34.538224] ffff88800e1fdb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.539132] ffff88800e1fdb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.540057] >ffff88800e1fdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.540961] ^ [ 34.541509] ffff88800e1fdc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.542421] ffff88800e1fdd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.543344] ================================================================== [ 34.544378] Disabling lock debugging due to kernel taint [ 36.504975] BUG: Bad rss-counter state mm:00000000ddb96e04 type:MM_FILEPAGES val:33 [ 36.506192] BUG: Bad rss-counter state mm:00000000ddb96e04 type:MM_ANONPAGES val:22 [ 37.043370] BUG: Bad rss-counter state mm:000000005f0f0811 type:MM_FILEPAGES val:33 [ 37.044548] BUG: Bad rss-counter state mm:000000005f0f0811 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45731' (ECDSA) to the list of known hosts. 2023/06/19 15:55:46 fuzzer started 2023/06/19 15:55:46 dialing manager at localhost:44161 2023/06/19 15:55:46 checking machine... 2023/06/19 15:55:46 checking revisions... [ 37.684851] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:55:46 testing simple program... [ 37.725655] cgroup: Unknown subsys name 'net' [ 37.772258] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:55:42 Registers: info registers vcpu 0 RAX=ffff8880187e7de0 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880187e7d01 RSI=ffff8880187e7d88 RDI=ffff8880187e7d88 RBP=ffff8880187e7a38 RSP=ffff8880187e7968 R8 =0000000000000001 R9 =ffff8880187e7a20 R10=0000000000038001 R11=00000000000229cd R12=ffff8880187e7a40 R13=ffff8880187e7a28 R14=ffff8880187e7d88 R15=ffff8880187e79e0 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007fc4c8791900 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=00007fc4c8d48618 CR3=000000000e7f6000 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=ffffffff8450b05e RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09f01 RSI=ffff88806cf09ff0 RDI=ffff88806cf09ff0 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff8609fb08 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ff8 R15=ffff88806cf09a98 RIP=ffffffff81131041 RFL=00000202 [-------] 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=00007fda36a88840 CR3=0000000019c6e000 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=2035343a35353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a35353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000