syzkaller login: [ 36.275058] BUG: Bad rss-counter state mm:000000009e8f2279 type:MM_FILEPAGES val:33 [ 36.276907] BUG: Bad rss-counter state mm:000000009e8f2279 type:MM_ANONPAGES val:22 [ 36.447369] ================================================================== [ 36.448171] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.448984] Read of size 8 at addr ffff888009a38310 by task sshd/219 [ 36.449662] [ 36.449853] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.450609] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.451473] Call Trace: [ 36.451757] [ 36.452017] dump_stack_lvl+0x91/0xf0 [ 36.452452] print_report+0xcc/0x620 [ 36.452882] ? __virt_addr_valid+0x102/0x340 [ 36.453374] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.453916] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.454470] kasan_report+0xbe/0xf0 [ 36.454893] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.455450] vma_interval_tree_remove+0xc75/0xec0 [ 36.456010] vma_prepare+0xc54/0x11a0 [ 36.456430] __split_vma+0x5af/0x950 [ 36.456848] ? __pfx___split_vma+0x10/0x10 [ 36.457316] ? find_held_lock+0x2c/0x110 [ 36.457783] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.458281] ? lock_is_held_type+0x9f/0x120 [ 36.458761] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.459302] ? mtree_range_walk+0x632/0x900 [ 36.459800] ? mas_walk+0x5c7/0x7c0 [ 36.460222] do_vmi_munmap+0x1f1/0x2b0 [ 36.460660] mmap_region+0x1f9/0x2660 [ 36.461083] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.461529] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.462167] ? __pfx_lock_acquire+0x10/0x10 [ 36.462637] ? __pfx_mmap_region+0x10/0x10 [ 36.463105] ? security_mmap_addr+0x7d/0xa0 [ 36.463576] ? get_unmapped_area+0x1f5/0x3f0 [ 36.464070] do_mmap+0x854/0xf00 [ 36.464471] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.464910] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.465413] ksys_mmap_pgoff+0x3af/0x500 [ 36.465865] do_syscall_64+0x3f/0x90 [ 36.466289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.466862] RIP: 0033:0x7f4f417aed82 [ 36.467273] 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 [ 36.469194] RSP: 002b:00007fff0070c298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.469994] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f417aed82 [ 36.470746] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f40be8000 [ 36.471511] RBP: 00007f4f40be8000 R08: 0000000000000009 R09: 0000000000001000 [ 36.472272] R10: 0000000000000812 R11: 0000000000000206 R12: 00005555bdea4ec0 [ 36.473025] R13: 00007fff0070c2b0 R14: 00007fff0070c2e0 R15: 00007fff0070c640 [ 36.473786] [ 36.474055] [ 36.474247] Allocated by task 212: [ 36.474628] kasan_save_stack+0x22/0x50 [ 36.475086] kasan_set_track+0x25/0x30 [ 36.475529] __kasan_slab_alloc+0x59/0x70 [ 36.476012] kmem_cache_alloc+0x16b/0x370 [ 36.476472] vm_area_dup+0x20/0x160 [ 36.476879] __split_vma+0x170/0x950 [ 36.477299] split_vma+0xc6/0x110 [ 36.477694] mprotect_fixup+0x8d2/0xb30 [ 36.478146] do_mprotect_pkey+0x87e/0xd40 [ 36.478608] __x64_sys_mprotect+0x78/0xc0 [ 36.479072] do_syscall_64+0x3f/0x90 [ 36.479500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.480077] [ 36.480271] Freed by task 212: [ 36.480624] kasan_save_stack+0x22/0x50 [ 36.481071] kasan_set_track+0x25/0x30 [ 36.481513] kasan_save_free_info+0x2b/0x50 [ 36.481991] __kasan_slab_free+0x10a/0x190 [ 36.482488] kmem_cache_free+0x10d/0x4d0 [ 36.482965] rcu_core+0x8c8/0x2860 [ 36.483366] __do_softirq+0x1b7/0x7d4 [ 36.483811] [ 36.484016] Last potentially related work creation: [ 36.484545] kasan_save_stack+0x22/0x50 [ 36.485002] __kasan_record_aux_stack+0x8e/0xa0 [ 36.485533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.486132] remove_vma+0x139/0x170 [ 36.486568] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.487087] do_vmi_munmap+0x1f1/0x2b0 [ 36.487546] __vm_munmap+0x138/0x3a0 [ 36.487996] __x64_sys_munmap+0x59/0x80 [ 36.488465] do_syscall_64+0x3f/0x90 [ 36.488912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.489498] [ 36.489696] Second to last potentially related work creation: [ 36.490351] kasan_save_stack+0x22/0x50 [ 36.490851] __kasan_record_aux_stack+0x8e/0xa0 [ 36.491391] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.491980] remove_vma+0x139/0x170 [ 36.492432] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.492978] do_vmi_munmap+0x1f1/0x2b0 [ 36.493448] mmap_region+0x1f9/0x2660 [ 36.493891] do_mmap+0x854/0xf00 [ 36.494291] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.494738] ksys_mmap_pgoff+0x3af/0x500 [ 36.495195] do_syscall_64+0x3f/0x90 [ 36.495650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.496263] [ 36.496470] The buggy address belongs to the object at ffff888009a382b8 [ 36.496470] which belongs to the cache vm_area_struct of size 168 [ 36.497788] The buggy address is located 88 bytes inside of [ 36.497788] freed 168-byte region [ffff888009a382b8, ffff888009a38360) [ 36.499074] [ 36.499271] The buggy address belongs to the physical page: [ 36.499889] page:0000000059227c08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a38 [ 36.500874] memcg:ffff88800d6e4f01 [ 36.501287] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.501921] page_type: 0xffffffff() [ 36.502350] raw: 0100000000000200 ffff88800879fc80 ffffea00003c5040 dead000000000005 [ 36.503179] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6e4f01 [ 36.504012] page dumped because: kasan: bad access detected [ 36.504825] [ 36.505028] Memory state around the buggy address: [ 36.505573] ffff888009a38200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.506387] ffff888009a38280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.507180] >ffff888009a38300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.507999] ^ [ 36.508443] ffff888009a38380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.509224] ffff888009a38400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.509996] ================================================================== [ 36.511128] Disabling lock debugging due to kernel taint [ 39.065494] BUG: Bad rss-counter state mm:0000000075e22713 type:MM_FILEPAGES val:33 [ 39.066677] BUG: Bad rss-counter state mm:0000000075e22713 type:MM_ANONPAGES val:22 [ 39.617491] BUG: Bad rss-counter state mm:000000004dac22e9 type:MM_FILEPAGES val:33 [ 39.618693] BUG: Bad rss-counter state mm:000000004dac22e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62464' (ECDSA) to the list of known hosts. 2023/06/19 20:20:25 fuzzer started 2023/06/19 20:20:26 dialing manager at localhost:44161 2023/06/19 20:20:26 checking machine... 2023/06/19 20:20:26 checking revisions... [ 40.262605] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:20:26 testing simple program... [ 40.318379] cgroup: Unknown subsys name 'net' [ 40.370333] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:20:18 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000c56db786 RCX=ffff88806cadbc30 RDX=0000000000000011 RSI=0000000000000001 RDI=00000000a33bdaa1 RBP=ffff88800cbfdfd0 RSP=ffff8880185ef478 R8 =000000008a446c72 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092cc0 R14=ffff8880185ef4e0 R15=0000000000000011 RIP=ffffffff82270f13 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 00007fbb50c22900 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=00007fff3aa81000 CR3=000000000e356000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007fdc81ae3000 CR3=000000000ca6c000 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=902c0868df462aab534705aad63a0cd6 XMM02=2c67c8bc2e329bc3000000000011df98 XMM03=fb795ef6d65770560000000000124550 XMM04=83b8a4a9cebdaf0400000000000ae988 XMM05=19e9129bd510f2350000000000135a68 XMM06=96de22c508f4337e00000000001348d0 XMM07=e042d86d42eb936e0000000000124828 XMM08=9dc9e08e8beab5fe000000000011dff8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000