[ 30.519888] BUG: Bad rss-counter state mm:0000000066f7637c type:MM_FILEPAGES val:33 [ 30.521032] BUG: Bad rss-counter state mm:0000000066f7637c type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.680036] ================================================================== [ 30.680920] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.681836] Read of size 8 at addr ffff88801998e228 by task sshd/218 [ 30.682592] [ 30.682812] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.683750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.684718] Call Trace: [ 30.685030] [ 30.685310] dump_stack_lvl+0x91/0xf0 [ 30.685807] print_report+0xcc/0x620 [ 30.686286] ? __virt_addr_valid+0x102/0x340 [ 30.686822] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.687424] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.688035] kasan_report+0xbe/0xf0 [ 30.688515] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.689128] vma_interval_tree_remove+0xc75/0xec0 [ 30.689723] vma_prepare+0xc54/0x11a0 [ 30.690195] __split_vma+0x5af/0x950 [ 30.690661] ? __pfx___split_vma+0x10/0x10 [ 30.691185] ? find_held_lock+0x2c/0x110 [ 30.691706] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.692267] ? lock_is_held_type+0x9f/0x120 [ 30.692806] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.693406] ? mtree_range_walk+0x632/0x900 [ 30.693950] ? mas_walk+0x5c7/0x7c0 [ 30.694419] do_vmi_munmap+0x1f1/0x2b0 [ 30.694908] mmap_region+0x1f9/0x2660 [ 30.695391] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.695898] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.696620] ? __pfx_lock_acquire+0x10/0x10 [ 30.697145] ? __pfx_mmap_region+0x10/0x10 [ 30.697672] ? security_mmap_addr+0x7d/0xa0 [ 30.698197] ? get_unmapped_area+0x1f5/0x3f0 [ 30.698744] do_mmap+0x854/0xf00 [ 30.699178] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.699665] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.700226] ksys_mmap_pgoff+0x3af/0x500 [ 30.700739] do_syscall_64+0x3f/0x90 [ 30.701211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.701849] RIP: 0033:0x7f802bf6ed82 [ 30.702301] 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 [ 30.704384] RSP: 002b:00007fff01a32268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.705293] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f802bf6ed82 [ 30.706131] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f802b3a8000 [ 30.706969] RBP: 00007f802b3a8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.707806] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b85c3f7ec0 [ 30.708650] R13: 00007fff01a32280 R14: 00007fff01a322b0 R15: 00007fff01a32610 [ 30.709496] [ 30.709787] [ 30.710003] Allocated by task 211: [ 30.710426] kasan_save_stack+0x22/0x50 [ 30.710928] kasan_set_track+0x25/0x30 [ 30.711416] __kasan_slab_alloc+0x59/0x70 [ 30.711935] kmem_cache_alloc+0x16b/0x370 [ 30.712457] vm_area_dup+0x20/0x160 [ 30.712910] __split_vma+0x170/0x950 [ 30.713373] split_vma+0xc6/0x110 [ 30.713807] mprotect_fixup+0x8d2/0xb30 [ 30.714303] do_mprotect_pkey+0x87e/0xd40 [ 30.714822] __x64_sys_mprotect+0x78/0xc0 [ 30.715343] do_syscall_64+0x3f/0x90 [ 30.715813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.716457] [ 30.716675] Freed by task 202: [ 30.717065] kasan_save_stack+0x22/0x50 [ 30.717566] kasan_set_track+0x25/0x30 [ 30.718055] kasan_save_free_info+0x2b/0x50 [ 30.718585] __kasan_slab_free+0x10a/0x190 [ 30.719117] kmem_cache_free+0x10d/0x4d0 [ 30.719623] rcu_core+0x8c8/0x2860 [ 30.720062] __do_softirq+0x1b7/0x7d4 [ 30.720535] [ 30.720748] Last potentially related work creation: [ 30.721327] kasan_save_stack+0x22/0x50 [ 30.721827] __kasan_record_aux_stack+0x8e/0xa0 [ 30.722400] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.723039] remove_vma+0x139/0x170 [ 30.723485] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.724040] do_vmi_munmap+0x1f1/0x2b0 [ 30.724535] __vm_munmap+0x138/0x3a0 [ 30.724999] __x64_sys_munmap+0x59/0x80 [ 30.725492] do_syscall_64+0x3f/0x90 [ 30.725962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.726590] [ 30.726806] The buggy address belongs to the object at ffff88801998e1d0 [ 30.726806] which belongs to the cache vm_area_struct of size 168 [ 30.728402] The buggy address is located 88 bytes inside of [ 30.728402] freed 168-byte region [ffff88801998e1d0, ffff88801998e278) [ 30.729815] [ 30.730034] The buggy address belongs to the physical page: [ 30.730687] page:000000005e1e6c25 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1998e [ 30.731778] memcg:ffff8880196b7101 [ 30.732216] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.732888] page_type: 0xffffffff() [ 30.733338] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.734260] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880196b7101 [ 30.735164] page dumped because: kasan: bad access detected [ 30.735823] [ 30.736041] Memory state around the buggy address: [ 30.736634] ffff88801998e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.737490] ffff88801998e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.738377] >ffff88801998e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.739239] ^ [ 30.739792] ffff88801998e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.740668] ffff88801998e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.741517] ================================================================== [ 30.742666] Disabling lock debugging due to kernel taint [ 32.646795] BUG: Bad rss-counter state mm:0000000064593e6e type:MM_FILEPAGES val:33 [ 32.647796] BUG: Bad rss-counter state mm:0000000064593e6e type:MM_ANONPAGES val:22 [ 33.116134] BUG: Bad rss-counter state mm:0000000058cfa14f type:MM_FILEPAGES val:33 [ 33.117809] BUG: Bad rss-counter state mm:0000000058cfa14f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49873' (ECDSA) to the list of known hosts. 2023/06/19 12:47:29 fuzzer started 2023/06/19 12:47:29 dialing manager at localhost:44161 2023/06/19 12:47:29 checking machine... 2023/06/19 12:47:29 checking revisions... [ 33.826850] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:47:29 testing simple program... [ 33.865566] cgroup: Unknown subsys name 'net' [ 33.904396] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:47:22 Registers: info registers vcpu 0 RAX=0000562bc9e130c1 RBX=0000562bc9e130c0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000023 RDI=0000562bc9e130c0 RBP=0000000000000002 RSP=00007ffdd854e438 R8 =0000562bc9e178de R9 =00007f42a1431be0 R10=0000000000000100 R11=0000000000000246 R12=0000562bc9e08d00 R13=00007ffdd854e448 R14=00007f42a0e5ab22 R15=00007f42a0e7f710 RIP=00007f42a13d24ec RFL=00000283 [--S---C] 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 00007f42a0e7f900 00000000 00000000 GS =0000 0000000000000000 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=00007ffdd8548000 CR3=0000000019962000 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=0000000000000000000000000000ff00 XMM02=000000ff00000000000000000000ffff XMM03=6579090942414e455f474f4c4c494146 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffff0000ffffffffffffffffffffffff XMM08=6579090042414e455f474f4c4c000023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f0e0b1d2030 CR3=0000000009a9c000 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=00000000000000000000000000000000 XMM01=46f68f590de34aa49a4535a48351b7b8 XMM02=2c67c8bc2e329bc3000000000011c838 XMM03=fb795ef6d65770560000000000123280 XMM04=df9fb7b441c542ac00000000000ae988 XMM05=751b9502027dc0b90000000000132b48 XMM06=b3a3d9376393747a00000000001315b8 XMM07=e042d86d42eb936e0000000000123500 XMM08=9cb36afc98828a9f000000000011c898 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000