{"id":"CVE-2023-52770","summary":"f2fs: split initial and dynamic conditions for extent_cache","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: split initial and dynamic conditions for extent_cache\n\nLet's allocate the extent_cache tree without dynamic conditions to avoid a\nmissing condition causing a panic as below.\n\n # create a file w/ a compressed flag\n # disable the compression\n # panic while updating extent_cache\n\nF2FS-fs (dm-64): Swapfile: last extent is not aligned to section\nF2FS-fs (dm-64): Swapfile (3) is not align to section: 1) creat(), 2) ioctl(F2FS_IOC_SET_PIN_FILE), 3) fallocate(2097152 * N)\nAdding 124996k swap on ./swap-file.  Priority:0 extents:2 across:17179494468k\n==================================================================\nBUG: KASAN: null-ptr-deref in instrument_atomic_read_write out/common/include/linux/instrumented.h:101 [inline]\nBUG: KASAN: null-ptr-deref in atomic_try_cmpxchg_acquire out/common/include/asm-generic/atomic-instrumented.h:705 [inline]\nBUG: KASAN: null-ptr-deref in queued_write_lock out/common/include/asm-generic/qrwlock.h:92 [inline]\nBUG: KASAN: null-ptr-deref in __raw_write_lock out/common/include/linux/rwlock_api_smp.h:211 [inline]\nBUG: KASAN: null-ptr-deref in _raw_write_lock+0x5a/0x110 out/common/kernel/locking/spinlock.c:295\nWrite of size 4 at addr 0000000000000030 by task syz-executor154/3327\n\nCPU: 0 PID: 3327 Comm: syz-executor154 Tainted: G           O      5.10.185 #1\nHardware name: emulation qemu-x86/qemu-x86, BIOS 2023.01-21885-gb3cc1cd24d 01/01/2023\nCall Trace:\n __dump_stack out/common/lib/dump_stack.c:77 [inline]\n dump_stack_lvl+0x17e/0x1c4 out/common/lib/dump_stack.c:118\n __kasan_report+0x16c/0x260 out/common/mm/kasan/report.c:415\n kasan_report+0x51/0x70 out/common/mm/kasan/report.c:428\n kasan_check_range+0x2f3/0x340 out/common/mm/kasan/generic.c:186\n __kasan_check_write+0x14/0x20 out/common/mm/kasan/shadow.c:37\n instrument_atomic_read_write out/common/include/linux/instrumented.h:101 [inline]\n atomic_try_cmpxchg_acquire out/common/include/asm-generic/atomic-instrumented.h:705 [inline]\n queued_write_lock out/common/include/asm-generic/qrwlock.h:92 [inline]\n __raw_write_lock out/common/include/linux/rwlock_api_smp.h:211 [inline]\n _raw_write_lock+0x5a/0x110 out/common/kernel/locking/spinlock.c:295\n __drop_extent_tree+0xdf/0x2f0 out/common/fs/f2fs/extent_cache.c:1155\n f2fs_drop_extent_tree+0x17/0x30 out/common/fs/f2fs/extent_cache.c:1172\n f2fs_insert_range out/common/fs/f2fs/file.c:1600 [inline]\n f2fs_fallocate+0x19fd/0x1f40 out/common/fs/f2fs/file.c:1764\n vfs_fallocate+0x514/0x9b0 out/common/fs/open.c:310\n ksys_fallocate out/common/fs/open.c:333 [inline]\n __do_sys_fallocate out/common/fs/open.c:341 [inline]\n __se_sys_fallocate out/common/fs/open.c:339 [inline]\n __x64_sys_fallocate+0xb8/0x100 out/common/fs/open.c:339\n do_syscall_64+0x35/0x50 out/common/arch/x86/entry/common.c:46","modified":"2026-08-12T03:51:18.921662559Z","published":"2024-05-21T15:30:52.970Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52770.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/9de787139b0258a5dd1f498780c26d76b61d2958"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d83309e7e006cee8afca83523559017c824fbf7a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f803982190f0265fd36cf84670aa6daefc2b0768"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52770.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52770"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"72840cccc0a1a0a0dc1bb27b669a9111be6d0f6a"},{"fixed":"9de787139b0258a5dd1f498780c26d76b61d2958"},{"fixed":"d83309e7e006cee8afca83523559017c824fbf7a"},{"fixed":"f803982190f0265fd36cf84670aa6daefc2b0768"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"4377b1d3b19e1369d094a94596211a9815ddbb04"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.1.29"},{"fixed":"6.2"}]}],"versions":["v6.1.28","v6.1.27","v6.1.26","v6.1.25","v6.1.24","v6.1.23","v6.1.22","v6.1.21","v6.1.20","v6.1.19","v6.1.18","v6.1.17","v6.1.16","v6.1.15","v6.1.14","v6.1.13","v6.1.12","v6.1.11","v6.1.10","v6.1.9","v6.1.8","v6.1.7","v6.1.6","v6.1-rc1","v6.1.5","v6.1.4","v6.1.3","v6.1.2","v6.1.1","v6.1","v6.1-rc8","v6.1-rc3","v6.1-rc6","v6.1-rc7","v6.1-rc4","v6.1-rc2","v6.1-rc5","v6.0-rc1","v6.0","v6.0-rc7","v6.0-rc3","v6.0-rc2","v6.0-rc6","v6.0-rc4","v6.0-rc5","v5.19","v5.19-rc1","v5.19-rc5","v5.19-rc8","v5.19-rc6","v5.18","v5.19-rc2","v5.19-rc7","v5.19-rc3","v5.19-rc4","v5.18-rc1","v5.18-rc7","v5.18-rc2","v5.18-rc5","v5.17","v5.18-rc4","v5.18-rc3","v5.18-rc6","v5.17-rc6","v5.17-rc4","v5.17-rc8","v5.17-rc7","v5.17-rc1","v5.17-rc3","v5.17-rc2","v5.17-rc5","v5.16","v5.16-rc1","v5.16-rc8","v5.16-rc5","v5.16-rc6","v5.16-rc7","v5.16-rc3","v5.16-rc2","v5.16-rc4","v5.15","v5.15-rc2","v5.15-rc1","v5.15-rc4","v5.15-rc7","v5.15-rc3","v5.15-rc5","v5.15-rc6","v5.14","v5.14-rc3","v5.14-rc1","v5.14-rc2","v5.14-rc7","v5.14-rc6","v5.13-rc1","v5.14-rc5","v5.14-rc4","v5.13","v5.13-rc6","v5.13-rc7","v5.13-rc3","v5.13-rc2","v5.13-rc4","v5.13-rc5","v5.12","v5.12-rc2","v5.12-rc1-dontuse","v5.12-rc1","v5.12-rc8","v5.12-rc3","v5.12-rc7","v5.12-rc5","v5.12-rc6","v5.12-rc4","v5.10","v5.11","v5.11-rc3","v5.11-rc7","v5.11-rc6","v5.11-rc5","v5.11-rc1","v5.11-rc4","v5.11-rc2","v5.10-rc1","v5.10-rc7","v5.10-rc4","v5.10-rc3","v5.10-rc6","v5.9","v5.10-rc2","v5.10-rc5","v5.9-rc1","v5.9-rc7","v5.9-rc8","v5.9-rc6","v5.9-rc4","v5.9-rc5","v5.9-rc3","v5.9-rc2","v5.8","v5.7","v5.8-rc2","v5.8-rc1","v5.8-rc7","v5.8-rc5","v5.8-rc3","v5.8-rc4","v5.8-rc6","v5.7-rc4","v5.7-rc7","v5.7-rc1","v5.7-rc3","v5.7-rc2","v5.7-rc5","v5.7-rc6","v5.6","v5.6-rc1","v5.6-rc7","v5.6-rc6","v5.6-rc3","v5.6-rc4","v5.6-rc2","v5.6-rc5","v5.5","v5.5-rc5","v5.5-rc7","v5.5-rc2","v5.5-rc1","v5.4","v5.5-rc4","v5.5-rc3","v5.5-rc6","v5.4-rc1","v5.4-rc6","v5.4-rc3","v5.4-rc4","v5.4-rc8","v5.4-rc7","v5.4-rc5","v5.3","v5.4-rc2","v5.3-rc5","v5.3-rc1","v5.3-rc2","v5.3-rc3","v5.3-rc8","v5.3-rc7","v5.3-rc4","v5.2","v5.3-rc6","v5.2-rc2","v5.2-rc7","v5.2-rc4","v5.2-rc1","v5.2-rc5","v5.2-rc6","v5.2-rc3","v5.1","v5.0-rc8","v5.1-rc7","v5.1-rc1","v5.1-rc6","v5.1-rc5","v5.0","v5.1-rc3","v5.1-rc2","v5.1-rc4","v5.0-rc1","v5.0-rc4","v5.0-rc3","v5.0-rc6","v5.0-rc7","v5.0-rc2","v5.0-rc5","v4.20-rc1","v4.19","v4.20","v4.20-rc7","v4.20-rc5","v4.20-rc6","v4.20-rc4","v4.20-rc2","v4.20-rc3","v4.19-rc2","v4.19-rc8","v4.19-rc4","v4.19-rc1","v4.19-rc7","v4.19-rc6","v4.19-rc5","v4.19-rc3","v4.18","v4.18-rc1","v4.18-rc8","v4.18-rc2","v4.18-rc5","v4.18-rc6","v4.18-rc7","v4.17","v4.18-rc3","v4.18-rc4","v4.17-rc1","v4.17-rc2","v4.17-rc7","v4.17-rc3","v4.17-rc4","v4.16","v4.17-rc6","v4.17-rc5","v4.16-rc7","v4.16-rc4","v4.16-rc1","v4.16-rc2","v4.16-rc5","v4.16-rc3","v4.16-rc6","v4.14","v4.15","v4.15-rc1","v4.15-rc4","v4.15-rc9","v4.15-rc8","v4.15-rc7","v4.15-rc3","v4.15-rc2","v4.15-rc5","v4.15-rc6","v4.14-rc1","v4.14-rc7","v4.14-rc3","v4.13","v4.14-rc8","v4.14-rc4","v4.14-rc6","v4.14-rc2","v4.14-rc5","v4.13-rc2","v4.13-rc1","v4.13-rc3","v4.13-rc7","v4.13-rc4","v4.13-rc5","v4.13-rc6","v4.12-rc1","v4.12","v4.12-rc5","v4.12-rc7","v4.12-rc6","v4.12-rc4","v4.12-rc2","v4.12-rc3","v4.11","v4.11-rc1","v4.11-rc6","v4.11-rc8","v4.11-rc7","v4.11-rc3","v4.11-rc5","v4.11-rc2","v4.11-rc4","v4.10","v4.9","v4.10-rc8","v4.10-rc3","v4.10-rc1","v4.10-rc7","v4.10-rc6","v4.10-rc2","v4.10-rc5","v4.10-rc4","v4.9-rc7","v4.9-rc6","v4.9-rc8","v4.9-rc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