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acc->k.data should be used with the lock hold: 00221 ========= TEST generic/187 00221 run fstests generic/187 at 2025-02-09 21:08:10 00221 spectre-v4 mitigation disabled by command-line option 00222 bcachefs (vdc): starting version 1.20: directory_size opts=errors=ro 00222 bcachefs (vdc): initializing new filesystem 00222 bcachefs (vdc): going read-write 00222 bcachefs (vdc): marking superblocks 00222 bcachefs (vdc): initializing freespace 00222 bcachefs (vdc): done initializing freespace 00222 bcachefs (vdc): reading snapshots table 00222 bcachefs (vdc): reading snapshots done 00222 bcachefs (vdc): done starting filesystem 00222 bcachefs (vdc): shutting down 00222 bcachefs (vdc): going read-only 00222 bcachefs (vdc): finished waiting for writes to stop 00223 bcachefs (vdc): flushing journal and stopping allocators, journal seq 6 00223 bcachefs (vdc): flushing journal and stopping allocators complete, journal seq 8 00223 bcachefs (vdc): clean shutdown complete, journal seq 9 00223 bcachefs (vdc): marking filesystem clean 00223 bcachefs (vdc): shutdown complete 00223 bcachefs (vdc): starting version 1.20: directory_size opts=errors=ro 00223 bcachefs (vdc): initializing new filesystem 00223 bcachefs (vdc): going read-write 00223 bcachefs (vdc): marking superblocks 00223 bcachefs (vdc): initializing freespace 00223 bcachefs (vdc): done initializing freespace 00223 bcachefs (vdc): reading snapshots table 00223 bcachefs (vdc): reading snapshots done 00223 bcachefs (vdc): done starting filesystem 00244 hrtimer: interrupt took 123350440 ns 00264 bcachefs (vdc): shutting down 00264 bcachefs (vdc): going read-only 00264 bcachefs (vdc): finished waiting for writes to stop 00264 bcachefs (vdc): flushing journal and stopping allocators, journal seq 97 00265 bcachefs (vdc): flushing journal and stopping allocators complete, journal seq 101 00265 bcachefs (vdc): clean shutdown complete, journal seq 102 00265 bcachefs (vdc): marking filesystem clean 00265 bcachefs (vdc): shutdown complete 00265 bcachefs (vdc): starting version 1.20: directory_size opts=errors=ro 00265 bcachefs (vdc): recovering from clean shutdown, journal seq 102 00265 bcachefs (vdc): accounting_read... 00265 ================================================================== 00265 done 00265 BUG: KASAN: slab-use-after-free in bch2_fs_to_text+0x12b4/0x1728 00265 bcachefs (vdc): alloc_read... done 00265 bcachefs (vdc): stripes_read... done 00265 Read of size 4 at addr ffffff80c57eac00 by task cat/7531 00265 bcachefs (vdc): snapshots_read... done 00265 00265 CPU: 6 UID: 0 PID: 7531 Comm: cat Not tainted 6.13.0-rc3-ktest-g16fc6fa3819d #14103 00265 Hardware name: linux,dummy-virt (DT) 00265 Call trace: 00265 show_stack+0x1c/0x30 (C) 00265 dump_stack_lvl+0x6c/0x80 00265 print_report+0xf8/0x5d8 00265 kasan_report+0x90/0xd0 00265 __asan_report_load4_noabort+0x1c/0x28 00265 bch2_fs_to_text+0x12b4/0x1728 00265 bch2_fs_show+0x94/0x188 00265 sysfs_kf_seq_show+0x1a4/0x348 00265 kernfs_seq_show+0x12c/0x198 00265 seq_read_iter+0x27c/0xfd0 00265 kernfs_fop_read_iter+0x390/0x4f8 00265 vfs_read+0x480/0x7f0 00265 ksys_read+0xe0/0x1e8 00265 __arm64_sys_read+0x70/0xa8 00265 invoke_syscall.constprop.0+0x74/0x1e8 00265 do_el0_svc+0xc8/0x1c8 00265 el0_svc+0x20/0x60 00265 el0t_64_sync_handler+0x104/0x130 00265 el0t_64_sync+0x154/0x158 00265 00265 Allocated by task 7510: 00265 kasan_save_stack+0x28/0x50 00265 kasan_save_track+0x1c/0x38 00265 kasan_save_alloc_info+0x3c/0x50 00265 __kasan_kmalloc+0xac/0xb0 00265 __kmalloc_node_noprof+0x168/0x348 00265 __kvmalloc_node_noprof+0x20/0x140 00265 __bch2_darray_resize_noprof+0x90/0x1b0 00265 __bch2_accounting_mem_insert+0x76c/0xb08 00265 bch2_accounting_mem_insert+0x224/0x3b8 00265 bch2_accounting_mem_mod_locked+0x480/0xc58 00265 bch2_accounting_read+0xa94/0x3eb8 00265 bch2_run_recovery_pass+0x80/0x178 00265 bch2_run_recovery_passes+0x340/0x698 00265 bch2_fs_recovery+0x1c98/0x2bd8 00265 bch2_fs_start+0x240/0x490 00265 bch2_fs_get_tree+0xe1c/0x1458 00265 vfs_get_tree+0x7c/0x250 00265 path_mount+0xe24/0x1648 00265 __arm64_sys_mount+0x240/0x438 00265 invoke_syscall.constprop.0+0x74/0x1e8 00265 do_el0_svc+0xc8/0x1c8 00265 el0_svc+0x20/0x60 00265 el0t_64_sync_handler+0x104/0x130 00265 el0t_64_sync+0x154/0x158 00265 00265 Freed by task 7510: 00265 kasan_save_stack+0x28/0x50 00265 kasan_save_track+0x1c/0x38 00265 kasan_save_free_info+0x48/0x88 00265 __kasan_slab_free+0x48/0x60 00265 kfree+0x188/0x408 00265 kvfree+0x3c/0x50 00265 __bch2_darray_resize_noprof+0xe0/0x1b0 00265 __bch2_accounting_mem_insert+0x76c/0xb08 00265 bch2_accounting_mem_insert+0x224/0x3b8 00265 bch2_accounting_mem_mod_locked+0x480/0xc58 00265 bch2_accounting_read+0xa94/0x3eb8 00265 bch2_run_recovery_pass+0x80/0x178 00265 bch2_run_recovery_passes+0x340/0x698 00265 bch2_fs_recovery+0x1c98/0x2bd8 00265 bch2_fs_start+0x240/0x490 00265 bch2_fs_get_tree+0xe1c/0x1458 00265 vfs_get_tree+0x7c/0x250 00265 path_mount+0xe24/0x1648 00265 bcachefs (vdc): going read-write 00265 __arm64_sys_mount+0x240/0x438 00265 invoke_syscall.constprop.0+0x74/0x1e8 00265 do_el0_svc+0xc8/0x1c8 00265 el0_svc+0x20/0x60 00265 el0t_64_sync_handler+0x104/0x130 00265 el0t_64_sync+0x154/0x158 00265 00265 The buggy address belongs to the object at ffffff80c57eac00 00265 which belongs to the cache kmalloc-128 of size 128 00265 The buggy address is located 0 bytes inside of 00265 freed 128-byte region [ffffff80c57eac00, ffffff80c57eac80) 00265 00265 The buggy address belongs to the physical page: 00265 page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1057ea 00265 head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 00265 flags: 0x8000000000000040(head|zone=2) 00265 page_type: f5(slab) 00265 raw: 8000000000000040 ffffff80c0002800 dead000000000100 dead000000000122 00265 raw: 0000000000000000 0000000000200020 00000001f5000000 ffffff80c57a6400 00265 head: 8000000000000040 ffffff80c0002800 dead000000000100 dead000000000122 00265 head: 0000000000000000 0000000000200020 00000001f5000000 ffffff80c57a6400 00265 head: 8000000000000001 fffffffec315fa81 ffffffffffffffff 0000000000000000 00265 head: 0000000000000002 0000000000000000 00000000ffffffff 0000000000000000 00265 page dumped because: kasan: bad access detected 00265 00265 Memory state around the buggy address: 00265 ffffff80c57eab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00265 ffffff80c57eab80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00265 >ffffff80c57eac00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 00265 ^ 00265 ffffff80c57eac80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00265 ffffff80c57ead00: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc 00265 ================================================================== 00265 Kernel panic - not syncing: kasan.fault=panic set ... 00265 CPU: 6 UID: 0 PID: 7531 Comm: cat Not tainted 6.13.0-rc3-ktest-g16fc6fa3819d #14103 00265 Hardware name: linux,dummy-virt (DT) 00265 Call trace: 00265 show_stack+0x1c/0x30 (C) 00265 dump_stack_lvl+0x30/0x80 00265 dump_stack+0x18/0x20 00265 panic+0x4d4/0x518 00265 start_report.constprop.0+0x0/0x90 00265 kasan_report+0xa0/0xd0 00265 __asan_report_load4_noabort+0x1c/0x28 00265 bch2_fs_to_text+0x12b4/0x1728 00265 bch2_fs_show+0x94/0x188 00265 sysfs_kf_seq_show+0x1a4/0x348 00265 kernfs_seq_show+0x12c/0x198 00265 seq_read_iter+0x27c/0xfd0 00265 kernfs_fop_read_iter+0x390/0x4f8 00265 vfs_read+0x480/0x7f0 00265 ksys_read+0xe0/0x1e8 00265 __arm64_sys_read+0x70/0xa8 00265 invoke_syscall.constprop.0+0x74/0x1e8 00265 do_el0_svc+0xc8/0x1c8 00265 el0_svc+0x20/0x60 00265 el0t_64_sync_handler+0x104/0x130 00265 el0t_64_sync+0x154/0x158 00265 SMP: stopping secondary CPUs 00265 Kernel Offset: disabled 00265 CPU features: 0x000,00000070,00000010,8240500b 00265 Memory Limit: none 00265 ---[ end Kernel panic - not syncing: kasan.fault=panic set ... ]--- 00270 ========= FAILED TIMEOUT generic.187 in 1200s Signed-off-by: Alan Huang <mmpgouride@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.