syzkaller login: [ 38.808683] BUG: Bad rss-counter state mm:000000003484e64b type:MM_FILEPAGES val:33 [ 38.810340] BUG: Bad rss-counter state mm:000000003484e64b type:MM_ANONPAGES val:22 [ 38.990855] ================================================================== [ 38.991894] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.993033] Read of size 8 at addr ffff88800c61c140 by task sshd/218 [ 38.993922] [ 38.994188] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.995180] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.996297] Call Trace: [ 38.996661] [ 38.996988] dump_stack_lvl+0x91/0xf0 [ 38.997543] print_report+0xcc/0x620 [ 38.998121] ? __virt_addr_valid+0x102/0x340 [ 38.998753] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.999461] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.000173] kasan_report+0xbe/0xf0 [ 39.000749] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.001485] vma_interval_tree_remove+0xc75/0xec0 [ 39.002208] vma_prepare+0xc54/0x11a0 [ 39.002769] __split_vma+0x5af/0x950 [ 39.003312] ? __pfx___split_vma+0x10/0x10 [ 39.003923] ? find_held_lock+0x2c/0x110 [ 39.004523] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.005184] ? lock_is_held_type+0x9f/0x120 [ 39.005823] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.006564] ? mtree_range_walk+0x632/0x900 [ 39.007219] ? mas_walk+0x5c7/0x7c0 [ 39.007779] do_vmi_munmap+0x1f1/0x2b0 [ 39.008354] mmap_region+0x1f9/0x2660 [ 39.008924] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.009520] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.010359] ? __pfx_lock_acquire+0x10/0x10 [ 39.010987] ? __pfx_mmap_region+0x10/0x10 [ 39.011609] ? security_mmap_addr+0x7d/0xa0 [ 39.012233] ? get_unmapped_area+0x1f5/0x3f0 [ 39.012881] do_mmap+0x854/0xf00 [ 39.013396] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.013975] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.014631] ksys_mmap_pgoff+0x3af/0x500 [ 39.015210] do_syscall_64+0x3f/0x90 [ 39.015751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.016480] RIP: 0033:0x7f4b0f9d3d82 [ 39.017001] 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 [ 39.019429] RSP: 002b:00007ffd920b35a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.020477] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b0f9d3d82 [ 39.021463] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b0ee0d000 [ 39.022458] RBP: 00007f4b0ee0d000 R08: 0000000000000009 R09: 0000000000001000 [ 39.023442] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560046d55ec0 [ 39.024423] R13: 00007ffd920b35c0 R14: 00007ffd920b35f0 R15: 00007ffd920b3950 [ 39.025419] [ 39.025759] [ 39.026028] Allocated by task 211: [ 39.026531] kasan_save_stack+0x22/0x50 [ 39.027117] kasan_set_track+0x25/0x30 [ 39.027698] __kasan_slab_alloc+0x59/0x70 [ 39.028310] kmem_cache_alloc+0x16b/0x370 [ 39.028915] vm_area_dup+0x20/0x160 [ 39.029447] __split_vma+0x170/0x950 [ 39.030000] split_vma+0xc6/0x110 [ 39.030508] mprotect_fixup+0x8d2/0xb30 [ 39.031090] do_mprotect_pkey+0x87e/0xd40 [ 39.031688] __x64_sys_mprotect+0x78/0xc0 [ 39.032281] do_syscall_64+0x3f/0x90 [ 39.032821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.033530] [ 39.033770] Freed by task 211: [ 39.034212] kasan_save_stack+0x22/0x50 [ 39.034778] kasan_set_track+0x25/0x30 [ 39.035329] kasan_save_free_info+0x2b/0x50 [ 39.035922] __kasan_slab_free+0x10a/0x190 [ 39.036510] kmem_cache_free+0x10d/0x4d0 [ 39.037081] rcu_core+0x8c8/0x2860 [ 39.037577] __do_softirq+0x1b7/0x7d4 [ 39.038121] [ 39.038358] Last potentially related work creation: [ 39.039008] kasan_save_stack+0x22/0x50 [ 39.039568] __kasan_record_aux_stack+0x8e/0xa0 [ 39.040205] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.040914] remove_vma+0x139/0x170 [ 39.041421] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.042041] do_vmi_munmap+0x1f1/0x2b0 [ 39.042583] __vm_munmap+0x138/0x3a0 [ 39.043097] __x64_sys_munmap+0x59/0x80 [ 39.043643] do_syscall_64+0x3f/0x90 [ 39.044164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.044877] [ 39.045114] The buggy address belongs to the object at ffff88800c61c0e8 [ 39.045114] which belongs to the cache vm_area_struct of size 168 [ 39.046750] The buggy address is located 88 bytes inside of [ 39.046750] freed 168-byte region [ffff88800c61c0e8, ffff88800c61c190) [ 39.048337] [ 39.048582] The buggy address belongs to the physical page: [ 39.049338] page:000000001093a0e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc61c [ 39.050591] memcg:ffff888016d8e401 [ 39.051080] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.051811] page_type: 0xffffffff() [ 39.052324] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.053389] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d8e401 [ 39.054445] page dumped because: kasan: bad access detected [ 39.055197] [ 39.055438] Memory state around the buggy address: [ 39.056103] ffff88800c61c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.057085] ffff88800c61c080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.058077] >ffff88800c61c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.059043] ^ [ 39.059763] ffff88800c61c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.060725] ffff88800c61c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.061683] ================================================================== [ 39.062836] Disabling lock debugging due to kernel taint [ 41.235652] BUG: Bad rss-counter state mm:0000000025a4ae5d type:MM_FILEPAGES val:33 [ 41.236905] BUG: Bad rss-counter state mm:0000000025a4ae5d type:MM_ANONPAGES val:22 [ 41.678864] BUG: Bad rss-counter state mm:00000000be9bc8bf type:MM_FILEPAGES val:33 [ 41.679856] BUG: Bad rss-counter state mm:00000000be9bc8bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56698' (ECDSA) to the list of known hosts. 2023/06/19 20:34:34 fuzzer started 2023/06/19 20:34:34 dialing manager at localhost:44161 2023/06/19 20:34:34 checking machine... 2023/06/19 20:34:34 checking revisions... [ 42.469325] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:34:34 testing simple program... [ 42.522320] cgroup: Unknown subsys name 'net' [ 42.573429] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:34:34 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f92cc438c10 CR3=000000000ca22000 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=e33e1909fb8d5baeea457196f82d9a96 XMM02=2c67c8bc2e329bc3000000000011e0c0 XMM03=fb795ef6d657705600000000001242c8 XMM04=0b7f76d4a2bae1d900000000000ae988 XMM05=0ff658b71cdbaeb20000000000134d58 XMM06=bdf2e299e47b49d50000000000133a88 XMM07=e042d86d42eb936e0000000000124548 XMM08=2c029cb77bcdf0e7000000000011e120 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008c78ea0 RCX=0000000000000000 RDX=ffff888018088000 RSI=0000000000000004 RDI=ffff888008c78ff8 RBP=ffff8880098bfd90 RSP=ffff8880098bfc90 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008c78ff8 R13=0000000000000001 R14=ffff888019c1e6b8 R15=0000000000000200 RIP=ffffffff8180fd50 RFL=00000293 [--S-A-C] 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 00007fd012946900 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=00007fffc33a9000 CR3=0000000015aea000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000