syzkaller login: [ 30.920177] BUG: Bad rss-counter state mm:00000000d1d57744 type:MM_FILEPAGES val:33 [ 30.920881] BUG: Bad rss-counter state mm:00000000d1d57744 type:MM_ANONPAGES val:22 [ 31.066670] ================================================================== [ 31.067787] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.068817] Read of size 8 at addr ffff88800e0e7ed8 by task sshd/220 [ 31.069706] [ 31.069932] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.070819] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.071821] Call Trace: [ 31.072141] [ 31.072424] dump_stack_lvl+0x91/0xf0 [ 31.072914] print_report+0xcc/0x620 [ 31.073400] ? __virt_addr_valid+0x102/0x340 [ 31.073963] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074598] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.075217] kasan_report+0xbe/0xf0 [ 31.075702] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.076327] vma_interval_tree_remove+0xc75/0xec0 [ 31.076924] vma_prepare+0xc54/0x11a0 [ 31.077401] __split_vma+0x5af/0x950 [ 31.077875] ? __pfx___split_vma+0x10/0x10 [ 31.078414] ? find_held_lock+0x2c/0x110 [ 31.078942] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.079536] ? lock_is_held_type+0x9f/0x120 [ 31.080081] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.080695] ? mtree_range_walk+0x632/0x900 [ 31.081251] ? mas_walk+0x5c7/0x7c0 [ 31.081728] do_vmi_munmap+0x1f1/0x2b0 [ 31.082217] mmap_region+0x1f9/0x2660 [ 31.082699] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.083217] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.083950] ? __pfx_lock_acquire+0x10/0x10 [ 31.084486] ? __pfx_mmap_region+0x10/0x10 [ 31.085021] ? security_mmap_addr+0x7d/0xa0 [ 31.085549] ? get_unmapped_area+0x1f5/0x3f0 [ 31.086124] do_mmap+0x854/0xf00 [ 31.086560] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.087066] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.087639] ksys_mmap_pgoff+0x3af/0x500 [ 31.088146] do_syscall_64+0x3f/0x90 [ 31.088631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.089276] RIP: 0033:0x7f6e909ecd82 [ 31.089736] 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 [ 31.091864] RSP: 002b:00007ffd6a23dbf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.092773] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e909ecd82 [ 31.093610] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e8fe26000 [ 31.094449] RBP: 00007f6e8fe26000 R08: 0000000000000009 R09: 0000000000001000 [ 31.095301] R10: 0000000000000812 R11: 0000000000000206 R12: 00005649fc47dec0 [ 31.096141] R13: 00007ffd6a23dc10 R14: 00007ffd6a23dc40 R15: 00007ffd6a23dfa0 [ 31.096996] [ 31.097289] [ 31.097508] Allocated by task 213: [ 31.097945] kasan_save_stack+0x22/0x50 [ 31.098454] kasan_set_track+0x25/0x30 [ 31.098945] __kasan_slab_alloc+0x59/0x70 [ 31.099485] kmem_cache_alloc+0x16b/0x370 [ 31.100007] vm_area_dup+0x20/0x160 [ 31.100461] __split_vma+0x170/0x950 [ 31.100939] split_vma+0xc6/0x110 [ 31.101380] mprotect_fixup+0x8d2/0xb30 [ 31.101910] do_mprotect_pkey+0x87e/0xd40 [ 31.102431] __x64_sys_mprotect+0x78/0xc0 [ 31.102950] do_syscall_64+0x3f/0x90 [ 31.103433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.104078] [ 31.104295] Freed by task 213: [ 31.104688] kasan_save_stack+0x22/0x50 [ 31.105191] kasan_set_track+0x25/0x30 [ 31.105688] kasan_save_free_info+0x2b/0x50 [ 31.106228] __kasan_slab_free+0x10a/0x190 [ 31.106767] kmem_cache_free+0x10d/0x4d0 [ 31.107280] rcu_core+0x8c8/0x2860 [ 31.107890] __do_softirq+0x1b7/0x7d4 [ 31.108485] [ 31.108751] Last potentially related work creation: [ 31.109468] kasan_save_stack+0x22/0x50 [ 31.110076] __kasan_record_aux_stack+0x8e/0xa0 [ 31.110858] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.111658] remove_vma+0x139/0x170 [ 31.112216] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.112905] do_vmi_munmap+0x1f1/0x2b0 [ 31.113502] __vm_munmap+0x138/0x3a0 [ 31.114069] __x64_sys_munmap+0x59/0x80 [ 31.114677] do_syscall_64+0x3f/0x90 [ 31.115261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.116072] [ 31.116334] Second to last potentially related work creation: [ 31.117012] kasan_save_stack+0x22/0x50 [ 31.117506] __kasan_record_aux_stack+0x8e/0xa0 [ 31.118071] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.118711] remove_vma+0x139/0x170 [ 31.119164] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.119737] do_vmi_munmap+0x1f1/0x2b0 [ 31.120227] mmap_region+0x1f9/0x2660 [ 31.120707] do_mmap+0x854/0xf00 [ 31.121131] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.121619] ksys_mmap_pgoff+0x3af/0x500 [ 31.122118] do_syscall_64+0x3f/0x90 [ 31.122588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.123221] [ 31.123443] The buggy address belongs to the object at ffff88800e0e7e80 [ 31.123443] which belongs to the cache vm_area_struct of size 168 [ 31.124912] The buggy address is located 88 bytes inside of [ 31.124912] freed 168-byte region [ffff88800e0e7e80, ffff88800e0e7f28) [ 31.126300] [ 31.126517] The buggy address belongs to the physical page: [ 31.127169] page:000000004135d2d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0e7 [ 31.128258] memcg:ffff8880094b5a01 [ 31.128677] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.129371] page_type: 0xffffffff() [ 31.129817] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.130713] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094b5a01 [ 31.131612] page dumped because: kasan: bad access detected [ 31.132263] [ 31.132474] Memory state around the buggy address: [ 31.133049] ffff88800e0e7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.133903] ffff88800e0e7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.134756] >ffff88800e0e7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.135630] ^ [ 31.136344] ffff88800e0e7f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.137206] ffff88800e0e7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.138052] ================================================================== [ 31.139008] Disabling lock debugging due to kernel taint [ 33.640408] BUG: Bad rss-counter state mm:00000000a1170e75 type:MM_FILEPAGES val:33 [ 33.641540] BUG: Bad rss-counter state mm:00000000a1170e75 type:MM_ANONPAGES val:22 [ 34.038848] BUG: Bad rss-counter state mm:00000000fcd46c69 type:MM_FILEPAGES val:33 [ 34.039906] BUG: Bad rss-counter state mm:00000000fcd46c69 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33896' (ECDSA) to the list of known hosts. 2023/06/20 05:49:15 fuzzer started 2023/06/20 05:49:16 dialing manager at localhost:44161 2023/06/20 05:49:16 checking machine... 2023/06/20 05:49:16 checking revisions... [ 34.763093] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:49:16 testing simple program... [ 34.817666] cgroup: Unknown subsys name 'net' [ 34.857422] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:49:15 Registers: info registers vcpu 0 RAX=000000000000002f RBX=00007ffca41c4a80 RCX=00007f460b066163 RDX=0000000000000000 RSI=00007ffca41c4a40 RDI=0000000000000009 RBP=00007ffca41c4ad0 RSP=00007ffca41c3988 R8 =00007ffca41c4a24 R9 =000000000000000c R10=0000000000000000 R11=0000000000000246 R12=00007ffca41c4a24 R13=00007ffca41c4a40 R14=0000000000000009 R15=00000000000000e5 RIP=ffffffff84600010 RFL=00000002 [-------] 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 00007f460ab73900 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=00007f460b12a618 CR3=0000000019c66000 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=1ffff110011d0c39 RBX=ffff888008e86198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888008e861c8 RBP=ffff88800dc7a000 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800dc2cf00 R14=ffffffff8186b9c5 R15=ffff88800dbe6f80 RIP=ffffffff8184636c RFL=00000046 [---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=00007f78fed19b90 CR3=000000000c7e6000 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=61152084689934bcca49d4e77f964398 XMM02=000000000011cdf8eff9b2d0a8fce9cb XMM03=000000000011cec82c67c8bc2e329bc3 XMM04=a0b4bf75b226d25c00000000000ae988 XMM05=19e9129bd510f2350000000000135268 XMM06=4fda316b135da52b00000000001350f0 XMM07=e042d86d42eb936e0000000000124628 XMM08=d180262621a85c13000000000011cec8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000