[ 25.401804] BUG: Bad rss-counter state mm:0000000002849025 type:MM_FILEPAGES val:33 [ 25.403043] BUG: Bad rss-counter state mm:0000000002849025 type:MM_ANONPAGES val:22 [ 25.441400] ================================================================== [ 25.442375] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.443456] Read of size 8 at addr ffff88800f0a2058 by task sshd/220 [ 25.444223] [ 25.444439] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.445304] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.446309] Call Trace: [ 25.446625] [ 25.446910] dump_stack_lvl+0x91/0xf0 [ 25.447400] print_report+0xcc/0x620 [ 25.447884] ? __virt_addr_valid+0x102/0x340 [ 25.448439] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.449062] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.449676] kasan_report+0xbe/0xf0 [ 25.450166] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.450796] vma_interval_tree_remove+0xc75/0xec0 [ 25.451404] vma_prepare+0xc54/0x11a0 [ 25.451886] __split_vma+0x5af/0x950 [ 25.452371] ? __pfx___split_vma+0x10/0x10 [ 25.452898] ? find_held_lock+0x2c/0x110 [ 25.453418] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.454006] ? lock_is_held_type+0x9f/0x120 [ 25.454547] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.455159] ? mtree_range_walk+0x632/0x900 [ 25.455708] ? mas_walk+0x5c7/0x7c0 [ 25.456181] do_vmi_munmap+0x1f1/0x2b0 [ 25.456667] mmap_region+0x1f9/0x2660 [ 25.457152] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.457668] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.458401] ? __pfx_lock_acquire+0x10/0x10 [ 25.458934] ? __pfx_mmap_region+0x10/0x10 [ 25.459465] ? security_mmap_addr+0x7d/0xa0 [ 25.459993] ? get_unmapped_area+0x1f5/0x3f0 [ 25.460543] do_mmap+0x854/0xf00 [ 25.460981] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.461473] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.462052] ksys_mmap_pgoff+0x3af/0x500 [ 25.462557] do_syscall_64+0x3f/0x90 [ 25.463030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.463674] RIP: 0033:0x7fb7db97ed82 [ 25.464127] 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 [ 25.466282] RSP: 002b:00007fffcc2dfab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.467191] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7db97ed82 [ 25.468046] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7dadb8000 [ 25.468886] RBP: 00007fb7dadb8000 R08: 0000000000000009 R09: 0000000000001000 [ 25.469753] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c180a2df60 [ 25.470605] R13: 00007fffcc2dfad0 R14: 00007fffcc2dfb00 R15: 00007fffcc2dfe60 [ 25.471474] [ 25.471767] [ 25.471984] Allocated by task 213: [ 25.472407] kasan_save_stack+0x22/0x50 [ 25.472911] kasan_set_track+0x25/0x30 [ 25.473401] __kasan_slab_alloc+0x59/0x70 [ 25.473939] kmem_cache_alloc+0x16b/0x370 [ 25.474463] vm_area_dup+0x20/0x160 [ 25.474918] __split_vma+0x170/0x950 [ 25.475384] split_vma+0xc6/0x110 [ 25.475823] mprotect_fixup+0x8d2/0xb30 [ 25.476322] do_mprotect_pkey+0x87e/0xd40 [ 25.476856] __x64_sys_mprotect+0x78/0xc0 [ 25.477378] do_syscall_64+0x3f/0x90 [ 25.477855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.478501] [ 25.478719] Freed by task 213: [ 25.479118] kasan_save_stack+0x22/0x50 [ 25.479623] kasan_set_track+0x25/0x30 [ 25.480124] kasan_save_free_info+0x2b/0x50 [ 25.480659] __kasan_slab_free+0x10a/0x190 [ 25.481195] kmem_cache_free+0x10d/0x4d0 [ 25.481712] rcu_core+0x8c8/0x2860 [ 25.482181] __do_softirq+0x1b7/0x7d4 [ 25.482657] [ 25.482874] Last potentially related work creation: [ 25.483460] kasan_save_stack+0x22/0x50 [ 25.483968] __kasan_record_aux_stack+0x8e/0xa0 [ 25.484628] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.485271] remove_vma+0x139/0x170 [ 25.485758] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.486430] do_vmi_munmap+0x1f1/0x2b0 [ 25.487024] __vm_munmap+0x138/0x3a0 [ 25.487586] __x64_sys_munmap+0x59/0x80 [ 25.488198] do_syscall_64+0x3f/0x90 [ 25.488773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.489565] [ 25.489827] The buggy address belongs to the object at ffff88800f0a2000 [ 25.489827] which belongs to the cache vm_area_struct of size 168 [ 25.491661] The buggy address is located 88 bytes inside of [ 25.491661] freed 168-byte region [ffff88800f0a2000, ffff88800f0a20a8) [ 25.493399] [ 25.493657] The buggy address belongs to the physical page: [ 25.494472] page:00000000ead321c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0a2 [ 25.495788] memcg:ffff88801a3c1401 [ 25.496303] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.497079] page_type: 0xffffffff() [ 25.497610] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.498750] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3c1401 [ 25.499852] page dumped because: kasan: bad access detected [ 25.500654] [ 25.500905] Memory state around the buggy address: [ 25.501609] ffff88800f0a1f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.502668] ffff88800f0a1f80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 25.503695] >ffff88800f0a2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.504728] ^ [ 25.505617] ffff88800f0a2080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 25.506478] ffff88800f0a2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.507275] ================================================================== [ 25.508175] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.119951] BUG: Bad rss-counter state mm:00000000fea6c337 type:MM_FILEPAGES val:33 [ 28.121320] BUG: Bad rss-counter state mm:00000000fea6c337 type:MM_ANONPAGES val:22 [ 28.536949] BUG: Bad rss-counter state mm:000000000f2d642c type:MM_FILEPAGES val:33 [ 28.538087] BUG: Bad rss-counter state mm:000000000f2d642c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57663' (ECDSA) to the list of known hosts. 2023/06/19 22:02:09 fuzzer started 2023/06/19 22:02:10 dialing manager at localhost:44161 2023/06/19 22:02:10 checking machine... 2023/06/19 22:02:10 checking revisions... [ 29.307673] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:02:10 testing simple program... [ 29.348271] cgroup: Unknown subsys name 'net' [ 29.389149] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:02:08 Registers: info registers vcpu 0 RAX=ffffffffffffffff RBX=0000000000018f00 RCX=000000000000003b RDX=0000000000001000 RSI=00000000000000ff RDI=ffffed10031e0100 RBP=0000000000000000 RSP=ffff888008d7fca0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffed10031e0000 R11=0000000000000128 R12=0000000000000003 R13=ffffffff852c41f8 R14=ffffffff852c41e8 R15=ffffea000063c000 RIP=ffffffff8450d40a RFL=00000202 [-------] 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 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=00007fe373f3f650 CR3=000000000cb28000 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=2039303a32303a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a32303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff110028f6f13 RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff8880147b7888 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ed0 RFL=00000247 [---Z-PC] 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 00007fc68d0ca900 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=00007fc68c540ee0 CR3=000000000d572000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2d4bffdaabf3355c00000000000ae988 XMM05=00112cd76b0b50ab00000000001343f0 XMM06=4fda316b135da52b0000000000132e70 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000