[ 23.725529] BUG: Bad rss-counter state mm:00000000b5a745c8 type:MM_FILEPAGES val:33 [ 23.726324] BUG: Bad rss-counter state mm:00000000b5a745c8 type:MM_ANONPAGES val:22 [ 23.842577] ================================================================== [ 23.843265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.843973] Read of size 8 at addr ffff888017c09228 by task sshd/218 [ 23.844542] [ 23.844711] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.845383] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.846223] Call Trace: [ 23.846462] [ 23.846680] dump_stack_lvl+0x91/0xf0 [ 23.847058] print_report+0xcc/0x620 [ 23.847425] ? __virt_addr_valid+0x102/0x340 [ 23.847845] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.848329] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.848789] kasan_report+0xbe/0xf0 [ 23.849101] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.849502] vma_interval_tree_remove+0xc75/0xec0 [ 23.849893] vma_prepare+0xc54/0x11a0 [ 23.850200] __split_vma+0x5af/0x950 [ 23.850508] ? __pfx___split_vma+0x10/0x10 [ 23.850860] ? find_held_lock+0x2c/0x110 [ 23.851187] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.851555] ? lock_is_held_type+0x9f/0x120 [ 23.851911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.852294] ? mtree_range_walk+0x632/0x900 [ 23.852651] ? mas_walk+0x5c7/0x7c0 [ 23.852958] do_vmi_munmap+0x1f1/0x2b0 [ 23.853286] mmap_region+0x1f9/0x2660 [ 23.853595] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.853924] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.854381] ? __pfx_lock_acquire+0x10/0x10 [ 23.854723] ? __pfx_mmap_region+0x10/0x10 [ 23.855061] ? security_mmap_addr+0x7d/0xa0 [ 23.855393] ? get_unmapped_area+0x1f5/0x3f0 [ 23.855743] do_mmap+0x854/0xf00 [ 23.856027] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.856338] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.856697] ksys_mmap_pgoff+0x3af/0x500 [ 23.857016] do_syscall_64+0x3f/0x90 [ 23.857342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.857760] RIP: 0033:0x7f9b40615d82 [ 23.858050] 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 [ 23.859418] RSP: 002b:00007ffcd66bf108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.859998] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b40615d82 [ 23.860542] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b3fa4f000 [ 23.861091] RBP: 00007f9b3fa4f000 R08: 0000000000000009 R09: 0000000000001000 [ 23.861631] R10: 0000000000000812 R11: 0000000000000206 R12: 000056435cf0cd90 [ 23.862177] R13: 00007ffcd66bf120 R14: 00007ffcd66bf150 R15: 00007ffcd66bf4b0 [ 23.862722] [ 23.862910] [ 23.863052] Allocated by task 211: [ 23.863324] kasan_save_stack+0x22/0x50 [ 23.863643] kasan_set_track+0x25/0x30 [ 23.863959] __kasan_slab_alloc+0x59/0x70 [ 23.864293] kmem_cache_alloc+0x16b/0x370 [ 23.864626] vm_area_dup+0x20/0x160 [ 23.864921] __split_vma+0x170/0x950 [ 23.865230] split_vma+0xc6/0x110 [ 23.865511] mprotect_fixup+0x8d2/0xb30 [ 23.865836] do_mprotect_pkey+0x87e/0xd40 [ 23.866168] __x64_sys_mprotect+0x78/0xc0 [ 23.866503] do_syscall_64+0x3f/0x90 [ 23.866805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.867212] [ 23.867348] Freed by task 13: [ 23.867591] kasan_save_stack+0x22/0x50 [ 23.867911] kasan_set_track+0x25/0x30 [ 23.868223] kasan_save_free_info+0x2b/0x50 [ 23.868557] __kasan_slab_free+0x10a/0x190 [ 23.868892] kmem_cache_free+0x10d/0x4d0 [ 23.869220] rcu_core+0x8c8/0x2860 [ 23.869503] __do_softirq+0x1b7/0x7d4 [ 23.869809] [ 23.869948] Last potentially related work creation: [ 23.870324] kasan_save_stack+0x22/0x50 [ 23.870641] __kasan_record_aux_stack+0x8e/0xa0 [ 23.871010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.871414] remove_vma+0x139/0x170 [ 23.871702] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.872050] do_vmi_munmap+0x1f1/0x2b0 [ 23.872355] __vm_munmap+0x138/0x3a0 [ 23.872651] __x64_sys_munmap+0x59/0x80 [ 23.872962] do_syscall_64+0x3f/0x90 [ 23.873280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.873688] [ 23.873827] The buggy address belongs to the object at ffff888017c091d0 [ 23.873827] which belongs to the cache vm_area_struct of size 168 [ 23.874770] The buggy address is located 88 bytes inside of [ 23.874770] freed 168-byte region [ffff888017c091d0, ffff888017c09278) [ 23.875666] [ 23.875808] The buggy address belongs to the physical page: [ 23.876230] page:0000000031dfe281 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c09 [ 23.876927] memcg:ffff88800dcbfb01 [ 23.877206] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.877650] page_type: 0xffffffff() [ 23.877941] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ce8c0 dead000000000005 [ 23.878524] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcbfb01 [ 23.879101] page dumped because: kasan: bad access detected [ 23.879521] [ 23.879658] Memory state around the buggy address: [ 23.880030] ffff888017c09100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.880579] ffff888017c09180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 23.881137] >ffff888017c09200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 23.881681] ^ [ 23.882036] ffff888017c09280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.882580] ffff888017c09300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.883128] ================================================================== [ 23.883741] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.168632] BUG: Bad rss-counter state mm:00000000af37113a type:MM_FILEPAGES val:33 [ 25.169835] BUG: Bad rss-counter state mm:00000000af37113a type:MM_ANONPAGES val:22 [ 25.594971] BUG: Bad rss-counter state mm:0000000009d28ccc type:MM_FILEPAGES val:33 [ 25.596293] BUG: Bad rss-counter state mm:0000000009d28ccc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28469' (ECDSA) to the list of known hosts. 2023/06/20 22:57:14 fuzzer started 2023/06/20 22:57:15 dialing manager at localhost:36067 2023/06/20 22:57:15 checking machine... 2023/06/20 22:57:15 checking revisions... [ 26.327058] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:57:15 testing simple program... [ 26.382533] cgroup: Unknown subsys name 'net' [ 26.436934] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:57:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018efbb98 RCX=1ffff110031df75e RDX=0000000000000004 RSI=ffff88800eb33e44 RDI=ffff888018efbb8c RBP=0000000000000000 RSP=ffff88800ec7fb90 R8 =0000000000000001 R9 =ffff888018efbb8c R10=ffff888018efbb43 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888018efbb9c R14=ffff888018efbb8c R15=ffff888018efbab0 RIP=ffffffff844d8b6f RFL=00000297 [--S-APC] 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 00007f0dccb2e900 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=00007fff03124000 CR3=000000001a3b6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9e13b6 RSP=ffff88806cf09d98 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff8560b520 R13=ffffffff813782e4 R14=ffff88806cf35000 R15=ffff888019d961b0 RIP=ffffffff8180feac RFL=00000246 [---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=00007f8e276a2610 CR3=000000000d9c4000 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=2034313a37353a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a37353a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000