syzkaller login: [ 33.959316] BUG: Bad rss-counter state mm:0000000032388298 type:MM_FILEPAGES val:33 [ 33.960073] BUG: Bad rss-counter state mm:0000000032388298 type:MM_ANONPAGES val:22 [ 33.990253] ================================================================== [ 33.990872] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.991529] Read of size 8 at addr ffff88800e601880 by task sshd/220 [ 33.992040] [ 33.992183] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.992740] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.993391] Call Trace: [ 33.993600] [ 33.993786] dump_stack_lvl+0x91/0xf0 [ 33.994115] print_report+0xcc/0x620 [ 33.994433] ? __virt_addr_valid+0x102/0x340 [ 33.994784] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.995172] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.995675] kasan_report+0xbe/0xf0 [ 33.995993] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.996393] vma_interval_tree_remove+0xc75/0xec0 [ 33.996779] vma_prepare+0xc54/0x11a0 [ 33.997115] __split_vma+0x5af/0x950 [ 33.997418] ? __pfx___split_vma+0x10/0x10 [ 33.997759] ? find_held_lock+0x2c/0x110 [ 33.998138] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.998509] ? lock_is_held_type+0x9f/0x120 [ 33.998851] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.999249] ? mtree_range_walk+0x632/0x900 [ 33.999621] ? mas_walk+0x5c7/0x7c0 [ 33.999947] do_vmi_munmap+0x1f1/0x2b0 [ 34.000262] mmap_region+0x1f9/0x2660 [ 34.000567] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.000892] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.001360] ? __pfx_lock_acquire+0x10/0x10 [ 34.001713] ? __pfx_mmap_region+0x10/0x10 [ 34.002054] ? security_mmap_addr+0x7d/0xa0 [ 34.002387] ? get_unmapped_area+0x1f5/0x3f0 [ 34.003019] do_mmap+0x854/0xf00 [ 34.003300] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.003631] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.003995] ksys_mmap_pgoff+0x3af/0x500 [ 34.004325] do_syscall_64+0x3f/0x90 [ 34.004632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.005112] RIP: 0033:0x7f3dcc4ced82 [ 34.005415] 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 [ 34.006853] RSP: 002b:00007ffc48c17a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.007454] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3dcc4ced82 [ 34.008038] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3dcb908000 [ 34.008602] RBP: 00007f3dcb908000 R08: 0000000000000009 R09: 0000000000001000 [ 34.009199] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561bc2c1eec0 [ 34.009798] R13: 00007ffc48c17a50 R14: 00007ffc48c17a80 R15: 00007ffc48c17de0 [ 34.010386] [ 34.010581] [ 34.010730] Allocated by task 213: [ 34.011133] kasan_save_stack+0x22/0x50 [ 34.011610] kasan_set_track+0x25/0x30 [ 34.011966] __kasan_slab_alloc+0x59/0x70 [ 34.012331] kmem_cache_alloc+0x16b/0x370 [ 34.012662] vm_area_dup+0x20/0x160 [ 34.012969] __split_vma+0x170/0x950 [ 34.013300] split_vma+0xc6/0x110 [ 34.013623] mprotect_fixup+0x8d2/0xb30 [ 34.013977] do_mprotect_pkey+0x87e/0xd40 [ 34.014339] __x64_sys_mprotect+0x78/0xc0 [ 34.014701] do_syscall_64+0x3f/0x90 [ 34.015032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.015469] [ 34.015655] Freed by task 213: [ 34.015943] kasan_save_stack+0x22/0x50 [ 34.016326] kasan_set_track+0x25/0x30 [ 34.016700] kasan_save_free_info+0x2b/0x50 [ 34.017078] __kasan_slab_free+0x10a/0x190 [ 34.017450] kmem_cache_free+0x10d/0x4d0 [ 34.017790] rcu_core+0x8c8/0x2860 [ 34.018122] __do_softirq+0x1b7/0x7d4 [ 34.018458] [ 34.018606] Last potentially related work creation: [ 34.019039] kasan_save_stack+0x22/0x50 [ 34.019403] __kasan_record_aux_stack+0x8e/0xa0 [ 34.019861] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.020328] remove_vma+0x139/0x170 [ 34.020630] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.021054] do_vmi_munmap+0x1f1/0x2b0 [ 34.021442] __vm_munmap+0x138/0x3a0 [ 34.021789] __x64_sys_munmap+0x59/0x80 [ 34.022138] do_syscall_64+0x3f/0x90 [ 34.022463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.022906] [ 34.023066] The buggy address belongs to the object at ffff88800e601828 [ 34.023066] which belongs to the cache vm_area_struct of size 168 [ 34.024140] The buggy address is located 88 bytes inside of [ 34.024140] freed 168-byte region [ffff88800e601828, ffff88800e6018d0) [ 34.025159] [ 34.025306] The buggy address belongs to the physical page: [ 34.025764] page:00000000869fb933 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe601 [ 34.026564] memcg:ffff888019c93a01 [ 34.026866] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.027312] page_type: 0xffffffff() [ 34.027650] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.028300] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c93a01 [ 34.028966] page dumped because: kasan: bad access detected [ 34.029437] [ 34.029580] Memory state around the buggy address: [ 34.029989] ffff88800e601780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 34.030658] ffff88800e601800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.031281] >ffff88800e601880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.031931] ^ [ 34.032268] ffff88800e601900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.032879] ffff88800e601980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 34.033498] ================================================================== [ 34.034265] Disabling lock debugging due to kernel taint [ 35.555235] BUG: Bad rss-counter state mm:00000000f9de75e8 type:MM_FILEPAGES val:33 [ 35.555917] BUG: Bad rss-counter state mm:00000000f9de75e8 type:MM_ANONPAGES val:22 [ 35.850166] BUG: Bad rss-counter state mm:00000000d40385b3 type:MM_FILEPAGES val:33 [ 35.850780] BUG: Bad rss-counter state mm:00000000d40385b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17639' (ECDSA) to the list of known hosts. 2023/06/20 09:53:09 fuzzer started 2023/06/20 09:53:09 dialing manager at localhost:44161 2023/06/20 09:53:09 checking machine... 2023/06/20 09:53:09 checking revisions... [ 36.437863] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:53:09 testing simple program... [ 36.471876] cgroup: Unknown subsys name 'net' [ 36.530547] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:53:07 Registers: info registers vcpu 0 RAX=1ffff11001a1b11d RBX=ffff88800d0d88b8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d0d88e8 RBP=ffff88800d0289f8 RSP=ffff888016ae7d18 R8 =0000000000000001 R9 =ffffed1002d5cf97 R10=0000000000000003 R11=00000000000b6cb2 R12=dffffc0000000000 R13=ffff88800d070000 R14=ffffffff813782a8 R15=ffff88800d070000 RIP=ffffffff81846362 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f393976b900 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=00007f3939d20650 CR3=00000000101fc000 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=23232323232323232323232323232323 XMM01=00000053000002a03b031b01003d0920 XMM02=ff000000000000000000000000000000 XMM03=0030303031200909094e494d5f444955 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=000000ffffffffffffffffffffffffff XMM08=0030303031200909094e494d5f444955 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f7500007328 RBX=000000000000000a RCX=3a5d3932325b6468 RDX=000000000000000a RSI=3932325b64687373 RDI=00007f7500007328 RBP=00007f7500007140 RSP=00007f7505dc36d0 R8 =0000000000000000 R9 =0000000000000000 R10=00007f7505dc3788 R11=000000000000000a R12=000000000000000a R13=00007f7505dc4cd0 R14=00007f7500000ba0 R15=00007f7505dc3788 RIP=000055e710424b89 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7505dc7700 00000000 00000000 GS =0000 0000000000000000 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=00007ffc7c6e2ec8 CR3=000000000e572000 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=33353a3930203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303838 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000