[ 30.864838] BUG: Bad rss-counter state mm:00000000eff629fb type:MM_FILEPAGES val:33 [ 30.865680] BUG: Bad rss-counter state mm:00000000eff629fb type:MM_ANONPAGES val:22 [ 30.966312] ================================================================== [ 30.967355] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.968075] Read of size 8 at addr ffff88801b899b38 by task sshd/219 [ 30.968810] [ 30.968978] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.969649] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.970401] Call Trace: [ 30.970691] <TASK> [ 30.970909] dump_stack_lvl+0x91/0xf0 [ 30.971290] print_report+0xcc/0x620 [ 30.971661] ? __virt_addr_valid+0x102/0x340 [ 30.972081] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.972559] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.973038] kasan_report+0xbe/0xf0 [ 30.973400] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.973890] vma_interval_tree_remove+0xc75/0xec0 [ 30.974359] vma_prepare+0xc54/0x11a0 [ 30.974750] __split_vma+0x5af/0x950 [ 30.975120] ? __pfx___split_vma+0x10/0x10 [ 30.975469] ? find_held_lock+0x2c/0x110 [ 30.975799] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.976153] ? lock_is_held_type+0x9f/0x120 [ 30.976493] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.976874] ? mtree_range_walk+0x632/0x900 [ 30.977226] ? mas_walk+0x5c7/0x7c0 [ 30.977524] do_vmi_munmap+0x1f1/0x2b0 [ 30.977829] mmap_region+0x1f9/0x2660 [ 30.978130] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.978467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.978917] ? __pfx_lock_acquire+0x10/0x10 [ 30.979250] ? __pfx_mmap_region+0x10/0x10 [ 30.979586] ? security_mmap_addr+0x7d/0xa0 [ 30.979922] ? get_unmapped_area+0x1f5/0x3f0 [ 30.980272] do_mmap+0x854/0xf00 [ 30.980550] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.980861] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.981220] ksys_mmap_pgoff+0x3af/0x500 [ 30.981538] do_syscall_64+0x3f/0x90 [ 30.981835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.982241] RIP: 0033:0x7f245700bd82 [ 30.982540] 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 [ 30.983880] RSP: 002b:00007ffdf3f583c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.984452] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f245700bd82 [ 30.984977] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2456445000 [ 30.985523] RBP: 00007f2456445000 R08: 0000000000000009 R09: 0000000000001000 [ 30.986061] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a48b285d90 [ 30.986608] R13: 00007ffdf3f583e0 R14: 00007ffdf3f58410 R15: 00007ffdf3f58770 [ 30.987154] </TASK> [ 30.987336] [ 30.987469] Allocated by task 209: [ 30.987735] kasan_save_stack+0x22/0x50 [ 30.988057] kasan_set_track+0x25/0x30 [ 30.988372] __kasan_slab_alloc+0x59/0x70 [ 30.988700] kmem_cache_alloc+0x16b/0x370 [ 30.989018] vm_area_dup+0x20/0x160 [ 30.989300] __split_vma+0x170/0x950 [ 30.989594] split_vma+0xc6/0x110 [ 30.989869] mprotect_fixup+0x8d2/0xb30 [ 30.990188] do_mprotect_pkey+0x87e/0xd40 [ 30.990523] __x64_sys_mprotect+0x78/0xc0 [ 30.990848] do_syscall_64+0x3f/0x90 [ 30.991143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.991553] [ 30.991689] Freed by task 209: [ 30.991940] kasan_save_stack+0x22/0x50 [ 30.992259] kasan_set_track+0x25/0x30 [ 30.992566] kasan_save_free_info+0x2b/0x50 [ 30.992895] __kasan_slab_free+0x10a/0x190 [ 30.993232] kmem_cache_free+0x10d/0x4d0 [ 30.993548] rcu_core+0x8c8/0x2860 [ 30.993824] __do_softirq+0x1b7/0x7d4 [ 30.994126] [ 30.994261] Last potentially related work creation: [ 30.994636] kasan_save_stack+0x22/0x50 [ 30.994946] __kasan_record_aux_stack+0x8e/0xa0 [ 30.995312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.995710] remove_vma+0x139/0x170 [ 30.995992] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.996341] do_vmi_munmap+0x1f1/0x2b0 [ 30.996642] __vm_munmap+0x138/0x3a0 [ 30.996934] __x64_sys_munmap+0x59/0x80 [ 30.997250] do_syscall_64+0x3f/0x90 [ 30.997547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.997955] [ 30.998087] The buggy address belongs to the object at ffff88801b899ae0 [ 30.998087] which belongs to the cache vm_area_struct of size 168 [ 30.999016] The buggy address is located 88 bytes inside of [ 30.999016] freed 168-byte region [ffff88801b899ae0, ffff88801b899b88) [ 30.999917] [ 31.000049] The buggy address belongs to the physical page: [ 31.000466] page:0000000080ac3aad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b899 [ 31.001161] memcg:ffff88801b875601 [ 31.001427] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.001836] page_type: 0xffffffff() [ 31.002118] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.002698] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b875601 [ 31.003277] page dumped because: kasan: bad access detected [ 31.003684] [ 31.003816] Memory state around the buggy address: [ 31.004180] ffff88801b899a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.004710] ffff88801b899a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.005248] >ffff88801b899b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.005784] ^ [ 31.006168] ffff88801b899b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.006727] ffff88801b899c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.007268] ================================================================== [ 31.007843] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.145252] BUG: Bad rss-counter state mm:00000000e2a48a21 type:MM_FILEPAGES val:33 [ 33.146570] BUG: Bad rss-counter state mm:00000000e2a48a21 type:MM_ANONPAGES val:22 [ 33.550542] BUG: Bad rss-counter state mm:000000005f06a125 type:MM_FILEPAGES val:33 [ 33.551730] BUG: Bad rss-counter state mm:000000005f06a125 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6228' (ECDSA) to the list of known hosts. 2023/06/20 12:43:18 fuzzer started 2023/06/20 12:43:19 dialing manager at localhost:36067 2023/06/20 12:43:19 checking machine... 2023/06/20 12:43:19 checking revisions... [ 34.231951] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:43:19 testing simple program... [ 34.278786] cgroup: Unknown subsys name 'net' [ 34.321458] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:43:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fde05079640 CR3=000000000c5a4000 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=2038313a33343a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a33343a3231203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=00005559b933ca40 RCX=000000000000000a RDX=000000000000004d RSI=00005559b934ac36 RDI=00005559b933cb20 RBP=00007ffe6c383170 RSP=00007ffe6c383110 R8 =00005559b934ac36 R9 =00007f9205c79be0 R10=0000000000000100 R11=0000000000000246 R12=000000000000004d R13=00005559b934ac82 R14=000000000000004d R15=0000000000000000 RIP=00007f9205b3085f RFL=00000246 [---Z-P-] 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 00007f92056c7900 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=00005559b9323954 CR3=000000001ca84000 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=7375206574617669727020726f662023 XMM01=20656874207369206469752065687420 XMM02=202c64696720736120656d6173206568 XMM03=2e69202c7370756f7267207265737520 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000000000000000ffffffffffffff XMM08=5f5350554f5247524553552066492023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000